Hydrologic and Nutrient Monitoring of the Lake Decatur Watershed

Contract Report 2010-07 | Prepared for the City of Decatur Hydrologic and Nutrient Monitoring of the Lake Decatur Watershed Final Report 1993-2008 Laura Keefer, Erin Bauer, Momcilo Markus Illinois State Water Survey, Center for Watershed Science Institute of Natural Resource Sustainability University of Illinois at Urbana-Champaign Hydrologic and Nutrient Monitoring of the Lake Decatur Watershed: Final Report 1993–2008 by Laura Keefer, Erin Bauer, and Momcilo Markus Center for Watershed Science Illinois State Water Survey Institute of Natural Resource Sustainability University of Illinois at Urbana-Champaign Champaign, IL Prepared for the City of Decatur Keith Alexander, Director of Water Management September 2010 This report was printed on recycled and recyclable papers. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the City of Decatur or the Illinois State Water Survey. Abstract Lake Decatur is the water supply reservoir for the City of Decatur. The reservoir was created in 1922 by constructing a dam to impound the flow of the Sangamon River. The dam was modified in 1956 to increase the maximum capacity of the lake to 28,000 acre-feet. The lake receives water from the 925-square-mile watershed of the Upper Sangamon River that includes portions of seven counties in east-central Illinois. Lake Decatur has high nitrate-N concentrations which have been consistently exceeding the Illinois Environmental Protection Agency (IEPA) drinking water standard of 10 milligrams per liter (mg/L) since 1980. This has created a serious situation for the drinking water supply of the City of Decatur, since nitrate-nitrogen (N) cannot be removed from finished drinking water through regular water purification processes. Since 1993, the Illinois State Water Survey (ISWS) has been monitoring the Lake Decatur watershed for trends in discharge, nitrate-N concentration, and nitrate-N yield and to identify any significant changes in the watershed. The purpose of the monitoring was to collect reliable scientific data throughout the watershed for use by city planners and resource managers to develop watershed management alternatives based on scientific data. The ISWS originally established eight monitoring stations in the Upper Sangamon River watershed. Three of those stations have been in continuous operation from May 1993 to April 2008. A companion study funded by the Agricultural Watershed Institute allowed for continued monitoring at those three stations from May 2008 through September 2008. The purpose of this report is to document and present the discharge, nitrate-N concentration, and nitrate-N yield data for the 15 water years of monitoring (October 1993–September 2008), as well as to determine any annual trends in the Lake Decatur watershed. The intended purpose of the monitoring data and trends investigation results is to assist the City of Decatur planners and resource managers in developing watershed management alternatives to manage the current and future city water supply. In summary, eight of the 15 water years experienced above or extremely above normal precipitation. Based on the 100-year streamflow record at the Monticello station, 4 of the top 11 total annual discharges occurred during the monitoring period (Water Year (WY) 1993 - 2nd, WY2008 - 3rd, WY1994 - 10th, and WY1998 - 11th), whereas WY2000 had the fourth lowest annual discharge. The 15-year mean annual nitrate-N yield delivered to Lake Decatur from the Upper Sangamon River watershed was 23 lb/acre and varied from 6 lb/acre (WY2000) to 42 lb/acre (WY2008). During the 15-year monitoring period, there were no significant trends in discharge and nitrate-N yields for the Long Creek (101), Friends Creek (102), and Monticello (111) stations in the Lake Decatur watershed. Annual average nitrate-N concentration for the Monticello (111) station had a statistically significant increasing trend with an increase of 0.087 mg/L per year based on the statistical fit of the annual average data. This dataset was augmented by a longer data record (WY1975–2006) from the downstream gaging station near Oakford to investigate longer-term trends in the Sangamon River watershed. There were no trends detected for nitrate-N concentration or yield within the 32-year record from the Oakford gage. iii Contents Page Introduction .................................................................................................................................... 1 Acknowledgments.................................................................................................................... 2 Background .................................................................................................................................... 5 Water Quality Issues in Lake Decatur ..................................................................................... 5 Watershed Physical Characteristics ......................................................................................... 5 Soil ..................................................................................................................................... 8 Channel Gradient ............................................................................................................. 12 Lake Sedimentation History ............................................................................................ 14 Land Use and Land Cover ............................................................................................... 15 Fertilizer Use .................................................................................................................... 20 Atmospheric Deposition .................................................................................................. 21 Hydrologic and Nitrate-N Monitoring ......................................................................................... 23 Hydrologic Monitoring .......................................................................................................... 23 Precipitation ..................................................................................................................... 24 Stream Stage .................................................................................................................... 24 Monitoring Equipment ............................................................................................... 24 Station Site Descriptions ............................................................................................ 28 Streamflow ....................................................................................................................... 32 Discharge ................................................................................................................... 32 Runoff ........................................................................................................................ 36 Nitrate-N Monitoring ............................................................................................................. 40 Sample Collection, Preservation, and Handling .............................................................. 40 Analytical Methods and QA/QC Procedures ................................................................... 40 Nitrate-N Concentrations ................................................................................................. 41 Nitrate-N Yields ............................................................................................................... 44 Flow-Weighted Nitrate-N Concentration ........................................................................ 48 Trends Investigation..................................................................................................................... 53 Data ....................................................................................................................................... 53 Statistical Approach ............................................................................................................... 55 Statistical Methods ................................................................................................................. 56 Statistical Results ................................................................................................................... 56 Spatial and Temporal Variability ........................................................................................... 57 Trends Summary .................................................................................................................... 63 v Contents (concluded) Page Summary and Conclusions .......................................................................................................... 67 Bibliography ................................................................................................................................ 69 Appendix A. Starting and Ending Dates of Water Years and Project Years........................... A-1 Appendix B. NASS Attribute Values and Definitions ............................................................ A-3 Appendix C. Monthly Precipitation at Selected Stations (May 1993–September 1998) ........ A-7 Appendix D. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) by Station ......................................................................................................... A-13 Appendix E. Nitrate-N Sample Concentrations (WY1993–2008) by Station .................... A-119 Appendix F. Annual Mean, Minimum, and Maximum Nitrate-N Concentrations (mg/L) by Station, WY1993–2008............................................................................. A-299 Appendix G. Monthly Nitrate-N Yields (WY1993–2008) .................................................. A-303 vi List of Tables Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Percent Area of Soil Association within the Lake Decatur Watershed ......................12 Mean Stream Slope of the Sangamon River and Selected Tributaries.......................13 Sources of Sediment to Lake Decatur: Estimated Proportion of Total Lake Sediment and Sediment Yield by Source Area .................................................14 Station Number, Name and Location, Period of Monitoring, and Drainage Area, Lake Decatur Watershed Monitoring Stations ..................................23 Monthly and Annual 30-Year (1971–2000) Mean Precipitation for Selected Stations (inches) ...........................................................................................26 Annual Precipitation for WY1993–2008 for Selected Stations (inches) ...................26 Annual Discharge for All Stations, WY1993–2008 ...................................................33 Annual Runoff for All Stations, WY1993–2008........................................................37 Annual Nitrate-N Yields in the Lake Decatur Watershed for the 15-Year Study Period .................................................................................................47 Summary of Rainfall, Streamflow, Flow-Weighted Nitrate-N Concentration, and Nitrate-N Yield for the Sangamon River at Monticello (111) for WY1993–2008 .........................................................................49 Summary of Rainfall, Runoff, Flow-Weighted Nitrate-N Concentration, and Nitrate-N Yield for the Friends Creek at Argenta (102) for WY1993–2008 ..............................................................................50 Summary of Rainfall, Runoff, Flow-Weighted Nitrate-N Concentration, and Nitrate-N Yield for the Long Creek at Twin Bridge Road (101) for WY1993–2008 .............................................................51 Station Number, Name and Location, Period of Record, and Drainage Area Used in Trend Analysis ......................................................................54 Significant Trends Based on Kendall-Tau Test (orange), T-test (blue), and Hotelling-Pabst Test (grey), for Variable Confidence Levels .............................57 vii List of Figures Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Location of Lake Decatur watershed ............................................................................6 Historical nitrate-N concentrations in Lake Decatur from a) 1923–2008 and b) 1967–2008 ..................................................................................7 Annual maximum, mean, and minimum nitrate-N concentrations in Lake Decatur for WY 1967–2008 ................................................................................8 Location of the Lake Decatur watershed in the physiographic divisions of Illinois ......................................................................................................................9 Map of soil associations in the Lake Decatur watershed ...........................................10 Map of soil parent material within the Lake Decatur watershed................................11 Stream profiles of the Upper Sangamon River and selected tributaries in the Lake Decatur watershed ...................................................................................13 Crop acreage harvested in the Lake Decatur watershed, 1925–2008 .........................16 Map of 2007 NASS land cover categories in Lake Decatur watershed .....................17 Percent difference in NASS land cover category areas between 1999 and 2007 datasets ........................................................................................................18 Percent difference in NASS 1999 and 2007 land cover category areas for Lake Decatur monitored watersheds and downstream regional watersheds ........19 Nitrogen fertilizer consumption for State of Illinois ..................................................20 Annual mean precipitation-weighted concentration and wet deposition at NADP/NTN site IL11 near Bondville, Illinois for WY1979–2008: a) Nitrate-N and b) Ammonium-N ........................................................................................................22 Location of the Lake Decatur sub-watershed boundaries and stream and precipitation monitoring stations .........................................................................25 Annual precipitation for WY1993–2008 ....................................................................27 Streamgaging equipment: (a) Leupold & Stevens data logger and (b) CR10X data logger ...............................................................................................28 Downstream (left) and upstream (right) views from stations in the study area ....................................................................................................................29 Annual discharge for river stations WY1993–2008 ...................................................34 Annual discharge for tributary stations WY1993–2008 .............................................35 Annual runoff for river stations WY1993–2008 ........................................................38 Annual runoff for tributary stations WY1993–2008 ..................................................39 Annual nitrate-N concentrations in the Sangamon River stations and Lake Decatur: a) minimum, b) mean, and c) maximum ......................................42 ix List of Figures (concluded) Page 23 24 25 26 27 28 29 Annual nitrate-N concentrations in the tributary stations: a) minimum, b) mean, and c) maximum ....................................................................43 Annual nitrate-N yield for Sangamon River stations during WY1993–2008 ...........................................................................................................45 Annual nitrate-N yield for tributary stations during WY1993–2008 .........................46 Runoff, nitrate-N yield, and flow-weighted nitrate-N concentration for the Long Creek, Friends Creek, and Sangamon River at Monticello and for the 15-Year Study Period (WY1993–2008) .............................................................................................52 Map of stations used in statistical analyses ................................................................54 Annual average nitrate-N concentrations at project and regional stations ........................................................................................................................58 Annual runoff at three of the monitoring study stations (revised from Figures 20 and 21) ......................................................................................................59 30 Annual runoff vs. annual precipitation for WY1994–2008........................................60 31 Long-term mean nitrate-N concentration, standard deviation, and coefficient of variation (CV) versus project and regional station drainage areas ............................60 Long-term mean discharge, standard deviation, and coefficient of variation (CV) versus project and regional station drainage areas .....................................................61 Long-term mean nitrate-N yield per acre, standard deviation, and coefficient of variation (CV) versus project and regional station drainage areas .............................62 Long-term mean monthly runoff for the project and regional stations ......................62 Long-term mean monthly nitrate-N yield per acre for the project and regional stations ...................................................................................................63 Long-term annual precipitation, 5- and 11-year moving averages for a) Illinois and b) Decatur precipitation station ..................................................................................65 32 33 34 35 36 x Hydrologic and Nutrient Monitoring of the Lake Decatur Watershed: Final Report 1993–2008 by Illinois State Water Survey Champaign, IL Introduction Lake Decatur is the water supply reservoir for the City of Decatur and several surrounding communities. The reservoir was built in 1922 by constructing a dam to impound the flow of the Sangamon River. The original dam had a crest elevation of 28 feet above the river bottom and a length of one-third of a mile. The dam created a lake with a surface area of 4.4 square miles and volume of 20,000 acre-feet (6,518 million gallons). The dam was modified in 1956 to increase the maximum capacity of the lake to 28,000 acre-feet (9,125 million gallons). Water withdrawal from the lake and pumping of nine groundwater wells combined provide drinking water for 82,000 people and average 34.9 million gallons per day (mgd). The Village of Mt. Zion is a full-time water customer of the City of Decatur. Harristown and the Long Creek Township Water Department periodically purchase water from the city (City of Decatur, 2008). The drainage area of the Sangamon River at the Lake Decatur dam is 925 square miles. The watershed includes portions of seven counties in east-central Illinois. The predominant land use in the watershed is row crop agriculture, which composes nearly 90 percent of the land area (Keefer and Bauer, 2005). The major urban areas within the watershed are Decatur, Monticello, Mahomet, Rantoul, and Gibson City. Lake Decatur has a history of high concentrations of total dissolved solids and nitratenitrogen (nitrate-N). This created a serious situation for the drinking water supply of the City of Decatur, since nitrate-N cannot be removed from finished drinking water through regular water purification processes. Nitrate-N concentrations in Lake Decatur have exceeded the Illinois Environmental Protection Agency (IEPA) drinking water standard of 10 milligrams per liter (mg/L), generally occurring on a seasonal basis (spring through mid-summer and late winter). In 1992, a Letter of Commitment (LOC) between the IEPA and the City of Decatur required the city to take several steps to reduce nitrate-N drinking water levels to acceptable concentrations within nine years. One of the steps required the city to conduct a two-year monitoring study to better understand nitrate-N yields in the Lake Decatur watershed. The Illinois State Water Survey (ISWS) received a grant from the City of Decatur in 1993 to conduct the two-year monitoring study and develop land-use management strategies that could assist the city in complying with IEPA drinking water standards (Demissie et al., 1994, 1996). The City of Decatur has continued to fund data collection to monitor the Lake Decatur watershed for nitrateN concentration and yields to detect possible trends and collect reliable hydrologic and water quality data throughout the watershed for use by city planners and resource managers to develop watershed management alternatives based on scientific data. In July 2000, the City of Decatur and the State of Illinois agreed to a Consent Order to construct an ion exchange facility at the South Water Treatment Plant to remove nitrate-N from the drinking water by July 1, 2002. The ion exchange facility went online in June 2002. Several ISWS publications report the monitoring results from 1993 to 2006. Demissie and Keefer (1996) present a technical report on the watershed investigation, modeling, and results of the first two project years (PY) of monitoring (May 1993–April 1995). Subsequent reports present monitoring for PY3–13 (May 1995–April 2006): PY3–4 in Keefer et al. (1996); PY5–7 in Keefer and Demissie (1999, 2000, and 2002); and PY8–13 in Keefer and Bauer (2005 and 2008). Reports for PY3–13 present annual results in the context of the longer term records and can be found in electronic format on the Illinois State Water Survey Web site (http://www.isws.illinois.edu/). Another product based on the earlier monitoring data is a model created by the ISWS to assist the city in forecasting weekly nitrate-N concentrations in Lake Decatur, which could assist in the operation of the South Water Treatment Plant ion exchange facility (Markus et al., 2003; Amenu et al., 2007; and Markus et al., 2009). Also, additional analysis using the dataset compared annual nitrate-N yield estimation methods as a function of dataset length, sampling frequency, and method of yield estimation (Guo et al., 2002). The conclusion was that similar accuracy in estimating annual nitrate-N yields can be achieved by frequent sampling for short time periods and less frequent sampling for much longer time periods. This final report reorganizes the annual data into water years (WY) rather than in the project years (PY) that were presented in earlier reports (see Appendix A). A water year begins in October and ends in September with the water year determined by the calendar year of the final month (September). For example, Water Year 2000 (WY2000) begins on October 1, 1999 and ends on September 30, 2000. This report will present annual results of the monitoring period from May 1993 through September 2008, which includes data from WY1993 through WY2008. Water year 1993 contains data from May 1993 through September 1993, and therefore is a partial year except where noted. The monitoring network initially consisted of eight stations and concluded with three stations. Data from each station will be discussed to the extent of the individual monitoring periods. The report is organized into five main sections: Introduction, Background, Hydrologic and Nitrate-N Monitoring, Trends Investigation, and Summary and Conclusions. The Background section is updated from the corresponding sections in Keefer and Bauer (2005, 2008). The Hydrologic and Nitrate-N Monitoring section discusses the annual monitoring results through WY2008. Using the hydrologic and monitoring results, a discharge and nitrate-N trends investigation was performed and presented in the Trends Investigation section. An extensive appendix (provided as PDF files on a CD insert in the hard copy of this report or as PDF files at the end of the electronic report file) is also included which contains data for the entire monitoring period. Acknowledgments This work was supported by the City of Decatur. Keith Alexander, Water Management Director, served as project manager, and his constant support, cooperation, and assistance are 2 greatly appreciated. Several other city officials and staff were very cooperative and supportive: the Decatur City Council, Mayor Paul Osborne, City Manager Steve Garman, and Assistant City Manager for Public Services John Smith. We would also like to acknowledge the cooperation and support from the Champaign, DeWitt, McLean, Macon, and Piatt Soil and Water Conservation Districts. During the last three years of this study, the U.S. Environmental Protection Agency (USEPA) funded a separate study through the Agricultural Watershed Institute (AWI). Much of the cost share for the USEPA study was provided by City of Decatur funding for the original monitoring study. This provided the means to continue hydrologic and nitrate monitoring at three of the City of Decatur stations, which extended the data for this report from April 2008 to the end of Water Year 2008 (September 2008). The authors gratefully acknowledge the support of the USEPA and AWI for providing these additional five months of data. The authors wish to acknowledge the significant contributions of the current ISWS project staff: Ryan Williams, Field Technician, was responsible for field data collection; Sandy Jones and Mary Richardson assisted with data entry and analysis; and Yi Han, Sediment Chemist, for assistance in preparing water samples for delivery to the ISWS Analytical Services Group. We gratefully acknowledge the nitrate-N analyses performed by the following chemists at the Illinois State Water Survey Center for Chemistry and Technology, Analytical Services Group: Sofia Lazovski, Ruthann Nichols, Lauren Sievers, Kaye Surratt, and Daniel Webb. Becky Howard prepared the final version of the report, which was edited by Lisa Sheppard. Sara Olson provided expert advice on illustration layout. We also acknowledge the extensive and thoughtful review of this report by Vern Knapp, Interim Head, Center for Watershed Science. This study was overseen by Dr. Misganaw Demissie, Director of Illinois State Water Survey, throughout the study period, and his expertise and guidance in various capacities are deeply appreciated. Over the course of the 15-year duration of this project we would like to acknowledge the many ISWS staff that at one time or another contributed their expertise toward the successful completion of this study: Field staff Data processing Lab analysis Louis Arighi Bill Bogner Kevin Rennels Amy Russell Susan Shaw James Slowikowski Josh Stevens Marguerite Tan Ryan Williams Ben Bromiel Brian Chaille Brad Chapin Robert Gardner Sandy Jones David Preston Mary Richardson Amy Russell Susan Shaw Sue Bachman Saada Hamdy Troy Foster Sofia Lazovski Matt Lowell RuthAnn Nicols Todd Peters Lavany Reddy Lauren Sievers Loretta Skowron Kay Surratt Dan Webb 3 Background Water Quality Issues in Lake Decatur Lake Decatur has experienced water quality problems for many years. Past studies by the U.S. Environmental Protection Agency (USEPA) and the Illinois Environmental Protection Agency (IEPA) documented historical water quality problems in the lake (USEPA, 1975; IEPA, 1978). Most of the problems are associated with nonpoint source pollution generated in the watershed of the Upper Sangamon River. The most pressing water quality problem in Lake Decatur is high concentration of nitrate-N. Nitrate-N cannot be removed from finished drinking water through regular water purification processes. Consequently, an ion-exchange nitrate removal facility was constructed at the South Water Treatment Plant and began operating in June 2002. The nitrate-N yield that eventually reaches Lake Decatur originates in the watershed of the Upper Sangamon River (Figure 1). To characterize and quantify the spatial and temporal distribution of nitrate-N yield in the Upper Sangamon, the City of Decatur supported watershed monitoring from 1993 to 2008 through a grant to the Illinois State Water Survey (ISWS). The purpose of the monitoring was to collect reliable hydrologic and water quality data throughout the watershed for use by city planners and resource managers to develop watershed management alternatives based on scientific data. Final results of the entire monitoring period are presented in this report. To put Lake Decatur nitrate-N concentrations in a historical perspective, Figure 2 presents available data from 1923 to 2008. As can be seen in Figure 2a, prior to 1967 nitrate-N concentration obtained from IEPA, raw records are significantly less dense than data following 1967. Consequently, this older data can provide a perspective only on data availability and not magnitude of concentrations during that period. The laboratory analytical method utilized to derive these older concentrations was not reported. Analytical methods used by ISWS laboratories for this study can be found later in this report. As can be seen in Figure 2b, nitrate-N concentrations in Lake Decatur raw water samples from the South Water Treatment Plant (SWTP) have exceeded the IEPA drinking water standard of 10 milligrams per liter (mg/L) at least once during the years of 1967, 1980–1991, 1996–1999, 2001–2002, 2004, and 2007–2008. For regulatory purposes, maximum concentrations are important for drinking water standards. Figure 3 shows that the maximum concentration measured from Lake Decatur exceeded the maximum contaminant level (MCL) most years since WY1980. The 42-year (WY1967–2008) average annual maximum concentration was 10.6 mg/L, whereas the average annual mean and minimum concentrations were below the MCL (5.0 and 0.5 mg/L, respectively). Watershed Physical Characteristics The Sangamon River is a major tributary to the Illinois River with the confluence near Chandlerville in Cass County. The drainage area of the Sangamon River at the Decatur dam is 925 square miles. The headwaters of the Sangamon River are in McLean County near the town of Ellsworth. The watershed lies across seven counties in east-central Illinois: Champaign, Christian, Dewitt, Ford, Macon, McLean, and Piatt, as shown in Figure 1. The major urban areas 5 Figure 1. Location of Lake Decatur watershed 6 18 16 Nitrate-N concentration MCL Historical Nitrate-N a) Nitrate-N Concentration (mg/L) 14 12 10 MCL 8 6 4 2 0 1920 1925 1930 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 Water Year 18 b) 16 Nitrate-N Concentration (mg/L) 14 12 10 MCL 8 6 4 2 0 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 Water Year Figure 2. Historical nitrate-N concentrations in Lake Decatur from a) 1923–2008 and b) 1967–2008 7 18 Annual Maximum Concentration Annual Mean Concentration Annual Minimum Concentration 16 Nitrate-N Concentration (mg/L) 14 12 10 MCL 8 6 4 2 0 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 Water Year Figure 3. Annual maximum, mean, and minimum nitrate-N concentrations in Lake Decatur for WY1967–2008 within the watershed are Decatur, Monticello, Mahomet, Rantoul, and Gibson City. The predominant land use in the watershed is row crop agriculture, which composes nearly 90 percent of the land area (Keefer and Bauer, 2005). The Lake Decatur watershed is in the humid, continental, climate region, typical for central Illinois. It lies exclusively in the Bloomington Ridged Plain of the Till Plains Section of the Central Lowland Province (Figure 4). The Till Plains section has broad till plains in a youthful erosion stage. Low, broad, morainic ridges with intervening wide stretches of relatively flat or gently undulating ground moraine characterize the Bloomington Ridged Plain (Leighton et al., 1948). Soil There are 14 major soil association types in the watershed. Figures 5 and 6 show the distribution of the different soil associations and parent material, respectively. The percentage of watershed area of each soil association also is presented (Table 1). The dominant soil associations in the Lake Decatur watershed consist of poorly drained Drummer and Sable silty clay loams and somewhat poorly drained Flanagan and Ipava silt loams (IL003, IL009, IL011, 8 Wisconsin Driftless Section Till Plains Section Great Lake Section Wheaton Morainal Country Chicago Lake Plain n io Green River Lowland Dissected Till Pla ins Se ct Rock River Hill Country Bloomington Ridged Plain Kankakee Plain CENTRAL LOWLAND PROVINCE Galesburg Plain Ancient Illinois Floodplain Till Plains Section Griggsville Plain Springfield Plain Lincoln Hills Section OZARK PLATEAUS PROVINCE ± Mt. Vernon Hill Country Salem Plateau Section Study Area Shawnee Hills INTERIOR Section LOW PLATEAUS Major Physiographic Province Physiographic Section PROVINCE COASTAL PLAIN PROVINCE Physiographic Division 0 15 30 60 90 Miles Figure 4. Location of the Lake Decatur watershed in the physiographic divisions of Illinois 9 14 16 44 14 12 Sa 9 9 42 39 ngam 12 14 on R 11 iver 14 14 11 11 12 21 14 14 DEWITT 14 11 44 s Creek MACON 39 3 mo ga San n ve Ri 11 r 9 IL012 : Saybrook-Dana-Drummer IL014 : Varna-Elliott-Ashkum ree k 9 C IL016 : Swygert-Bryce-Mokena g 39 39 L Soil Association Types IL011 : Plano-Proctor-Worthen PIATT 3 9 IL009 : Catlin-Flanagan-Drummer 24 39 11 IL003 : Tama-Ipava-Sable 9 12 11 Lake Decatur k 39 3 11 r ee nd 12 pC ie 3 41 Ca m Fr 12 41 42 3 34 11 12 24 34 12 11 42 9 CHAMPAIGN h tc Di Big 11 9 20 14 11 14 MCLEAN FORD 16 14 on 12 IL020 : Lorenzo-Warsaw-Wea 12 IL021 : Jasper-LaHogue-Selma 9 9 IL024 : Lawson-Sawmill-Darwin ± 12 0 2 4 8 IL034 : Clinton-Keomah-Rushville IL039 : Birkbeck-Sabina-Sunbury IL041 : St. Charles-Camden-Drury 12 16 Miles IL042 : Dodge-Russell-Miami IL044 : Morley-Blount-Beecher Scale 1 : 550,000 Figure 5. Map of soil associations in the Lake Decatur watershed 10 7 6 8 Sa 6 4 6 n ga m on R 5 7 5 i ve r 7 FORD 7 7 8 7 7 5 6 7 7 4 7 DEWITT 11 Bi g Di tc h 6 5 7 6 6 5 1 CHAMPAIGN 5 5 7 MCLEAN 10 7 1 5 1 ie 6 s Cr e e k 1 4 4 MACON San 1 mo ga nR 6 15 6 Parent Material 15 4 4 ree k PIATT 1 Thick loess (>60 inches) 4 Moderately thick loess (40-60 inches) on medium- to fine-textured, Wisconsinan till or lacustrine sediments Moderately thick to thin loess or silty material (24-60+ inches) on medium-textured, Wisconsinan outwash 5 g C 1 4 5 r ive 5 6 Lake Decatur L on 6 4 6 7 4 ± 6 MOULTRIE 0 2 4 12 Scale 1 : 550,000 16 Miles Thin loess (10-40 inches) on silty clay loam, Wisconsinan till or lacustrine sediments Thin loess (<20 inches) on loess, local wash, or Wisconsinan till 8 Thin loess (<20 inches) on silty clay or clay, Wisconsinan till or lacustrine sediments 10 Thin loamy or silty material on gravelly Wisconsinan outwash Thin silty or loamy materials on sandy and loamy Wisconsinan outwash 11 8 5 m nd 1 Ca Fr pC r ee k 4 15 Sandy to clayey alluvial sediments on bottomlands Figure 6. Map of soil parent material within the Lake Decatur watershed 11 Table 1. Percent Area of Soil Association within the Lake Decatur Watershed Association code IL003 IL012 IL009 IL011 IL014 IL039 IL016 IL024 IL044 IL042 IL041 IL021 IL034 IL020 Association name Percent watershed area Tama-Ipava-Sable Saybrook-Dana-Drummer Catlin-Flanagan-Drummer Plano-Proctor-Worthen Varna-Elliott-Ashkum Birkbeck-Sabina-Sunbury Swygert-Bryce-Mokena Lawson-Sawmill-Darwin Morley-Blount-Beecher Dodge-Russell-Miami St. Charles-Camden-Drury Jasper-LaHogue-Selma Clinton-Keomah-Rushville Lorenzo-Warsaw-Wea Water 27.4 17.7 15.4 13.4 8.4 7.7 3.3 1.9 1.7 1.6 0.3 0.3 0.2 0.1 0.5 and IL012), which cover 74 percent of the watershed area. These very fertile soils, the most productive in the watershed, are very resistant to drought, and have relatively high organic matter content. The watershed can be divided into three areas with respect to the drainage characteristics of the soil; these correspond closely with the distribution of the parent material. One area is in the west-central portion of the watershed on the north side of the Sangamon River. The dominant soil association in this area is Tama-Ipava-Sable, which are “poorly drained to moderately well drained soils formed in loess, on uplands” (Martin, 1991). The second area is along the southeastern watershed boundary where the dominant soils are poorly drained to moderately well-drained silty soils formed in loess on nearly level to moderately sloping terrain (Martin, 1991). The third area in the northeastern end of the watershed has two types of soil: poorly to moderately drained silty soils formed in loess, local wash, or glacial material on nearly level to gently sloping terrain, and moderately well to well drained silty soils formed in loess and the underlying glacial outwash on nearly level to moderately sloping ridges, outwash plains, or terraces (Fehrenbacher, 1990; National Agricultural Statistics Service, 2003). Channel Gradient Channel gradient (slope) is an indicator of erosion and stream velocity. Figure 7 shows the channel profiles for the Upper Sangamon River and selected tributaries with respect to the monitoring station locations and elevations. Each tributary is plotted relative to other tributaries and Lake Decatur. Data were retrieved from the Illinois Streams Information System (Day, 1999), version 3.0 from May 2003. Table 2 presents the mean percent slope of each tributary 12 900 850 Elevation (feet) 800 Big Ditch 750 Long Creek Sangamon River Friends Creek Camp Creek 700 650 Monitoring Stations 600 Lake Decatur 550 130 140 150 160 170 180 190 River Mile 200 210 220 230 Figure 7. Stream profiles of the Upper Sangamon River and selected tributaries in the Lake Decatur watershed Table 2. Mean Stream Slope of the Sangamon River and Selected Tributaries Mean slope (percent) Location Sangamon River Upstream of Lake Decatur Dam 0.059 Long Creek Long Creek upstream of Station 101 Big Creek #1 tributary Big Creek #2 tributary 0.223 0.223 0.199 0.296 Friends Creek Friends Creek upstream of Station 102 0.095 0.106 Sangamon River upstream of Station 111 0.068 Camp Creek Camp Creek upstream of Station 104 0.069 0.057 Sangamon River upstream of Station 105 0.082 Big Ditch Big Ditch upstream of Station 106 Big Ditch upper reach 0.141 0.154 0.538 13 240 and the river. The mean slope of the Sangamon River upstream of Lake Decatur Dam is 0.059 percent. The greatest slopes are found on the upper reach of Big Ditch (0.538 percent), Big Creek, a tributary to Long Creek (0.296 percent), and Long Creek upstream of Station 101 at Twin Bridges Road bridge (0.223 percent). Lake Sedimentation History Soil erosion in the Lake Decatur watershed is recognized as a long-term problem to be controlled so that Lake Decatur can provide an adequate water supply to the City of Decatur (Demissie and Keefer, 1996). The ISWS has conducted eight sedimentation surveys in Lake Decatur (1931 1932, 1936, 1946, 1956, 1966, 1983, 2000, and 2001). A report by Fitzpatrick et al. (1987) summarizes the surveys from 1931–1932 through 1983, and Bogner (2001, 2002) summarizes the 2000 and 2001 surveys. Analysis of the lake sedimentation surveys from 1922 until 1983 showed that total lake storage capacity dropped from 27,900 to 18,800 acre-feet (ac-ft), a loss of one-third of the original capacity in 61 years (Fitzpatrick et al., 1987). The annual capacity loss rate for Lake Decatur averaged 149 ac-ft. The total sediment delivered to the lake between 1922 and 1983 was 21.4 tons per acre of watershed. The 1922–1983 annual rate of sediment delivered to the lake is 0.35 tons per acre, and 77 percent of that sediment is trapped (deposited) in the lake for an annual accumulation rate of 0.27 tons per acre. Table 3 delineates the sources of sediment delivered to the lake for this period (Fitzpatrick et al., 1987). Sediment size fractions of samples taken in 1983 were 57 percent clay, 36 percent silt, and 7 percent sand (Bogner, 2001, 2002; Fitzpatrick et al., 1987). Sedimentation surveys conducted in 2000 and 2001 focused on three basins of Lake Decatur: the basin at the headwater of the main lake body (Basin 6) and the basin areas of the Sand Creek and Big/Long Creek tributaries at the southern end of the lake (Bogner, 2001, 2002). The capacity of Basin 6 decreased from 2,797 ac-ft in 1922 to 1,451 ac-ft in 2000, a loss of 48.1 percent. Annual sedimentation rates for Basin 6 decreased over time. The most recent rate, 8.3 ac-ft, occurred in 1983–2000 (Bogner, 2001). The capacity of the Big/Long Creek Basin Table 3. Sources of Sediment to Lake Decatur: Estimated Proportion of Total Lake Sediment and Sediment Yield by Source Area (Fitzpatrick et al., 1987) Lake Total lake watershed area sediment Yield to lake (percent) (percent) (tons/acre/year) Source All sources Sangamon River above Monticello Sangamon River below Monticello and above the lake Bluff watersheds Big/Long and Sand Creeks Lakeshore erosion Note: – indicates incomplete data or no data available. 14 100 59 25 6 9 – 100 22 27 29 19 2 0.27 0.10 0.29 1.25 0.56 – decreased from 2,754 ac-ft in 1922 to 1,512 ac-ft in 2001, a loss of 54.9 percent. Annual sedimentation rates for the basin were 9.9 ac-ft. Sediment consolidation was not as apparent in the deeper Big/Long Creek basin as in the shallower Basin 6 (Bogner, 2002). Land Use and Land Cover Land Use: Agriculture is the dominant land use in the Lake Decatur watershed. The following crop data are from the Illinois Agricultural Statistics Service (IASS). Figure 8 shows changes in acreage for selected crops in the watershed from 1925 to 2008. Agricultural land use increased from 416,400 acres (70 percent of the total watershed area) in 1925 to 496,000 acres (84 percent) in 2008. Since 1925, the percentage of land in agricultural use within the watershed was lowest in 1934 (62 percent) and highest in 1980 (90 percent). Corn and soybeans, the dominant crops, composed 83 percent of the watershed in 2008. Row crops (corn and soybeans) more than doubled from 1925 (221,020 acres) to 2008 (492,264 acres). However, corn acreage increased by only 67,077 acres over 84 years, averaging 227,949 acres and ranging from 163,470 acres in 1934 to 309,156 acres in 2008. Corn acreage sharply increased by 41,495 acres from 2006 to 2007 (15.5 percent). This dramatic increase in acreage was accompanied by an even greater decrease in soybean acres by 49,906 acres (-22 percent). The increased acreage of corn is assumed to be due to increased demand from ethanol producers. Corn acres dropped by 7 percent between 2007 and 2008 (21,059 acres), while soybeans rebounded by 18 percent (31,676 acres). As shown in Figure 8, soybean acreage gradually increased from 13,400 acres in 1927 to 204,200 acres in 2008. This increase had a reciprocating decrease in acreage of small grain crops such as wheat, oats, hay, and sorghum. Acreage for small grains began a steady decline from almost 34 percent of the watershed area in 1927 to less than 1 percent in 2008. In 2008 corn and soybean acreage accounted for nearly all the agricultural acreage in the watershed, whereas in 1925 corn and small grains acreage dominated. Land Cover: The United States Department of Agriculture, National Agricultural Statistics Service (USDA-NASS) Cropland Data Layer (CDL) is a raster, geo-referenced, categorized land cover data layer developed from satellite imagery. The Illinois CDL is categorized annually based on extensive field observations and a national survey based on a stratified random sample of land areas selected from each state. The survey focus is on cropland, but all land covers are recorded within the sampled land area. NASS uses broad land use categories to define land that is not under cultivation, including non-agricultural, pasture/rangeland, water, woods, and farmstead. The Illinois CDL uses 13 land categories for all land types of land cover. A list of all categorization codes and land covers can be found in Appendix B. Land cover data for 1999 and 2007 were retrieved for this report. A detailed description of the USDA-NASS Illinois Cropland Data Layers can be found in the Illinois Geospatial Clearinghouse at the Illinois State Geological Survey (http://www.isgs.illinois.edu/nsdihome/webdocs/landcover/index.html). The 2007 Illinois CDL data for the Lake Decatur watershed are illustrated in Figure 9. Corn and soybean acreage was 77 percent of the watershed area, developed areas (urban land cover) were 12 percent, grassland and forest were 5 percent each, and 1 percent of the watershed was covered with small grains, wetlands, open water, and other uses. As can be seen, the nonagricultural land covers (developed areas, forest, water/wetlands) are easily discernable from 15 600 All Acres Corn and Beans Corn Soybeans Small Grains 500 Acres ( x 1000) 400 300 200 100 0 1940 1960 1980 Year Figure 8. Crop acreage harvested in the Lake Decatur watershed, 1925–2008 16 2000 MCLEAN FORD § ¦ ¨ 57 § ¦ ¨ 74 DEWITT § ¦ ¨ 74 § ¦ ¨ 57 ® MACON § ¦ ¨ CHAMPAIGN 72 PIATT 2007 NASS Corn Other Ag Soybeans Winter Wheat Winter Wheat/Soybeans DOUGLAS Wetlands Water Developed Barren MOULTRIE Forest Grassland 0 SHELBY 3 COLES 6 9 Figure 9. Map of 2007 NASS land cover categories in Lake Decatur watershed 17 12 Miles the dominant distribution of agricultural land cover, predominantly corn and soybeans. In 2007, cropland area calculated from the IASS data was 82 percent of the watershed area, which is reasonably comparable to the 78 percent of cropland calculated from the Illinois CDL data. Cropland area information was also similar between the IASS and CDL datasets for 1999, 84 and 81 percent, respectively. The 1999 CDL data show corn and soybean acreage was 82 percent of the watershed area, developed areas were 3 percent, grassland was 10 percent, forest was 3 percent, and 2 percent of the watershed area was covered with all other crops, wetlands, open water, and other uses. Figure 10 illustrates the percent difference in area for each land cover category between 1999 and 2007. The largest difference in land cover area was the increases in corn and developed (urban) covers and decreases in soybean and grassland covers. Soybeans had the largest decrease (11 percent) and developed land had the largest increase (9 percent). Due to differences in technology and satellite data acquisition used to compute CDL data between 1999 and 2007, these percentages are not considered absolute but do represent relative changes over this time period. Figure 11 illustrates the difference between 1999 and 2007 for the 13 land cover categories for each of the eight monitored watersheds as well as the Sangamon River near Oakford. The Oakford station drainage area also was investigated to determine changes at increasingly larger scales and give regional context to the Lake Decatur watershed land cover Figure 10. Percent difference in NASS land cover category areas between 1999 and 2007 datasets 18 20 15 Percent Difference in Area 10 5 0 -5 Sangamon River near Oakford Sangamon River at Monticello Sangamon River near Mahomet -10 Sangamon River near Fisher Long Creek Friends Creek -15 Goose Creek Camp Creek Big Ditch -20 Figure 11. Percent difference in NASS 1999 and 2007 land cover category areas for Lake Decatur monitored watersheds and downstream regional watersheds 19 changes. All watersheds have similar patterns in the relative changes in land cover categories between 1999 and 2007; therefore these patterns are not unique to the Lake Decatur watershed. A general observation is the decrease in soybeans is more than twice as much as the increase in corn. Also, the Long Creek watershed seems to have some of the highest changes in land cover as compared to other watersheds. Long Creek had the highest increase and decrease in corn and soybean acres, respectively. Of all the Lake Decatur watersheds, Long Creek appears to have the highest decrease of grassland and highest increase in developed lands. The Long Creek watershed is within the City of Decatur metropolitan area, which includes the Village of Mt. Zion and Harristown and Long Creek Township communities. Fertilizer Use Row crop agriculture requires application of nitrogen fertilizer to produce viable yields at harvest. This is just one of several sources of nitrogen in a watershed (Demissie and Keefer, 1996). The following nitrogen consumption data were retrieved primarily from the Illinois Department of Agriculture and the United States Department of Agriculture Annual Summary reports (2003, 2002, 2001, 2000, 1994, 1984, 1976, 1970, and 1968), and NASS (online 2008), as well as from Mehring (1957), TVA (1994), and Jordan (1961). The data are reported for the State of Illinois and not by county, which makes it difficult to determine applications strictly for the Lake Decatur watershed. However, the general statewide trends for fertilizer consumption shown in Figure 12 are thought to be comparable to the Lake Decatur watershed. As can be seen in the figure, statewide nitrogen fertilizer consumption was extremely low in 1930, but steadily rose from generally 1,000 tons in the late 1940s to 1 million tons by 1980. Although some annual 1200 Nitrogen Consumption (tons x 1000) Source: Illinois Department of Agriculture and U.S. Department of Agriculture 1050 900 750 600 450 300 150 0 1930 1940 1950 1960 1970 Year 1980 1990 2000 Figure 12. Nitrogen fertilizer consumption for State of Illinois 20 2010 variation in nitrogen consumption is evident from 1980 through 2008, it was fairly steady during this period. Average nitrogen fertilizer consumption in the state averaged 923,800 tons from 1980 through 2008 and varied between a high of 1,055,600 tons in 1984 to a low of 778,700 tons in 1983. Atmospheric Deposition The National Atmospheric Deposition Program (NADP) is a long-term monitoring program which supports research on the effects of atmospheric chemical deposition. The NADP Program Office and Central Analytical Laboratory (CAL) are housed at the Illinois State Water Survey. The National Trends Network (NTN) in NADP provides a long-term record of precipitation chemistry across the United States. The purpose of the NTN is to provide weekly data on the amounts, trends, and geographic distributions of the atmospheric deposition of acids, nutrients, and base cations. The CAL analyzes NTN samples for pH (as pH), sulfate, nitrate, ammonium, chloride, calcium, magnesium, potassium, and sodium. The Bondville, Illinois (IL11) NTN station is the one closest to the Lake Decatur watershed of the four located in Illinois. The Bondville annual average precipitation-weighted concentration and wet deposition from WY1979 to 2007 for nitrate-N and ammonium-N were retrieved from the NADP Web site (http://nadp.sws.uiuc.edu). The unpublished data for WY2008 was computed for this study and is considered provisional. Annual data for the WY1979–2008 monitoring period are presented in Figure 13. The original data units were incompatible with the units used in this report, therefore the concentration and deposition data were converted from the ionic weight to nitrate and ammonium as nitrogen, and then wet deposition was converted to pounds per acre rather than kilograms per hectare. As seen in Figure 13a, the three-year moving average of annual mean nitrate-N precipitation-weighted concentrations and wet deposition appears to be decreasing from WY1979 to 2008. The concentrations varied from highs of 0.46 and 0.37 mg/L in WY1980 and WY1996, respectively, to lows of 0.27 and 0.32 mg/L in WY2004 and 2007. The mean annual nitrate-N concentration for the period of record is 0.34 mg/L. The wet deposition of nitrate-N ranged from 3.78 lb/acre in WY1998 and 1.63 lb/acre in WY2007. The mean annual wet deposition of nitrate-N was 2.61 lb/acre for the 30-year monitoring period. Another form of nitrogen measured by the NTN is ammonium. Figure 13b appears to show an increase in ammonium-N concentration and deposition for the period of record. There were three years with concentrations above 0.4 mg/L: WY1998, 2006, and 2008. The lowest concentration was 0.18 mg/L in WY1986. The mean annual ammonium-N concentration was 0.31 mg/L. The ammonium-N wet deposition ranged from 4.05 to 1.29 lb/acre in WY1998 and 1988, respectively. The 30-year mean annual wet deposition of ammonium-N was 2.39 lb/acre. 21 Precipitation-Weighted Concentration of Nitrate-N 3-yr Moving Average of Nitrate-N 0.5 a) Nitrate-N Wet Deposition of Nitrate-N Wet Deposition (lb/acre) 3-yr Moving Average of Nitrate-N 4 0.4 3 0.3 2 0.2 Precipitation-Weighted Concentration (mg/L) 5 Note: WY2008 is provisional 1 0.1 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 Water Year 0.5 Precipitation-Weighted Concentration of Ammonium-N 3-yr Moving Average of Ammonium-N b) Ammonium-N Wet Deposition of Ammonium-N Wet Deposition (lb/acre) 3-yr Moving Average of Ammonium-N 4 0.4 3 0.3 2 0.2 Precipitation-Weighted Concentration (mg/L) 5 Note: WY2008 is provisional 1 0.1 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 Water Year Figure 13. Annual mean precipitation-weighted concentration and wet deposition at NADP/NTN site IL11 near Bondville, Illinois for WY1979–2008: a) Nitrate-N and b) Ammonium N 22 Hydrologic and Nitrate-N Monitoring The watershed monitoring network was established in 1993 to provide streamflow and water quality data for the Upper Sangamon River and selected tributaries. The network originally comprised eight sampling stations (see Figure 14) throughout the watershed upstream of Lake Decatur. Table 4 presents the station number, location, monitoring period, and drainage area for each station. In this report the data from these stations are presented and discussed as annual data for Water Years (WY) 1993–2008 for the period May 1993 through September 2008. Therefore unless specified otherwise, WY1993 is a partial water year. The original study period was designed to conclude data collection at the end of April 2008. However, a separate but parallel monitoring study funded by the U.S. Environmental Protection Agency (USEPA) occurred at three of the stations (Long Creek, Friends Creek, and Monticello) through September 2008. The City of Decatur provided matching support for the additional study; therefore these additional five months of hydrologic and nitrate monitoring data were added to the report analysis to complete WY2008. Hydrologic Monitoring Continuous hydrologic monitoring of the water level at each station facilitates the calculation of streamflow (discharge). This is essential for establishing the nitrate-N contribution to Lake Decatur from the Upper Sangamon River and its tributaries. The ISWS installed streamgages at all monitoring sites, except the U.S. Geological Survey (USGS) streamgaging station at Monticello (111) and Fisher (112). At each ISWS station, stage was automatically recorded at 15-minute intervals and discharge measurements were made periodically. Water levels were checked manually on a weekly basis, and mean daily streamflow data were obtained from the USGS for the Monticello (111) and Fisher (112) stations. Table 4. Station Number, Name and Location, Period of Monitoring, and Drainage Area, Lake Decatur Watershed Monitoring Stations Station 101 102 103 104 105 106 111 112 Period of ISWS monitoring (water years) Name/location Long Creek: at Twin Bridge Road Friends Creek: at Route 48 near Argenta Goose Creek: near Deland Camp Creek: near White Heath Mahomet: Sangamon River at Shively Bridge near Mahomet Big Ditch: at Champaign County Road 700 East near Fisher Monticello: Sangamon River USGS Station (#05572000) near Monticello Fisher: Sangamon River USGS Station (#05570910) near Fisher 23 Drainage area (mi2) (acres) 1993 – 2008 1993 – 2008 1993 – 2000 1993 – 2002 46.2 111.9 45.1 47.2 29,568 71,616 28,864 30,208 1993 – 2003 368.2 235,648 1993 – 2003 38.2 24,448 1993 – 2008 543.4 347,776 1993 – 2000 245.6 157,184 Precipitation Precipitation data for selected locations around the watershed were retrieved predominantly from the Midwestern Regional Climate Center (MRCC) database at the ISWS (http://mrcc.sws.uiuc.edu). Figure 14 shows the locations of the six precipitation stations selected from within and around the Lake Decatur watershed: Clinton, Decatur, Gibson City, Rantoul, Monticello, and Urbana. Precipitation data were not available at the Monticello station from October 2003 through September 2006. Daily precipitation data were estimated from a method developed by Liang et al. (2004) using observational data from 7,235 National Oceanic and Atmospheric Administration (NOAA) cooperative stations across the United States. The Liang et al. (2004) method produces grid cell values based on the observed data. The four grid cells around Monticello were averaged to produce the daily data for the missing time period. The MRCC data for Gibson City ended in March 2008; therefore precipitation data from the Community Collaborative Rain, Hail & Snow Network (CoCoRaHS) Web site (http://www.cocorahs.org) were used for April–September 2008 by averaging two CoCoRaHS stations (IL-FD-5 and IL-MCL-2). CoCoRaHS data were also used to supplement a few days of missing data in June 2008 at Monticello. The monthly and annual 30-year (1971–2000) mean precipitation data are provided in Table 5. Table 6 presents the annual precipitation totals for each station and the 15-year mean annual precipitation for the study period. The dataset for WY1993 is complete. Both tables list each station in order from north to south in the watershed. The Gibson City station is the closest to the northern (headwater) portion of the watershed and the Decatur station is the farthest south (downstream). The 30-year (1971–2000) mean annual precipitation based on the six stations was 38.94 inches. The mean annual precipitation (39.14 inches) during the 15-year study period (WY1993– 2008) was only slightly higher than the 30-year mean. During WY1993–2008, annual precipitation varied from 37.71 to 40.84 inches. Annual precipitation for all 15 years of monitoring is presented in Figure 15. As can be seen in Figure 15, the highest annual precipitation occurred in the first and last water years of the monitoring period with a station average of approximately 54 inches for both years (15 inches above the 30-year mean). Water Year 2000 had the lowest station average annual precipitation of approximately 30 inches. Mean monthly and annual precipitation values for October 1992–September 2008 are presented in Appendix C. Stream Stage The “stage” of a stream is the measurement of the water surface elevation from an arbitrary datum. The stage is recorded at discrete intervals that make it possible to calculate the volume of water flowing past a gaging station (Demissie et al., 2001). Monitoring Equipment. Each ISWS streamgaging station housed a water-level recorder that continuously monitored and recorded the stage of the stream every 15 minutes. Water level was measured with a float-and-pulley system enclosed within a polyvinyl chloride pipe (PVC) 24 FISHER Gibson City ! < Sa n gam on R ive r ! < ! . MCLEAN 112 DEWITT 106 ! < ! . Rantoul BIG DITCH GOOSE CREEK ! . 105 FRIENDS CREEK ! < Clinton ! < 103 ! . CAMP CREEK ! . 111 ! . MACON ! . 102 La k ! < ! < Monticello PIATT ± CHAMPAIGN eD Decatur ! < ga 104 ec atu r San nR mo r i ve Urbana ! < ! . 101 BIG/LONG CREEK Sub-watershed Boundary Major Stream ! . Stream Monitoring Station ! < Precipitation Station 0 1.5 3 6 9 Figure 14. Location of the Lake Decatur sub-watershed boundaries and stream and precipitation monitoring stations 25 12 Miles Table 5. Monthly and Annual 30-Year (1971–2000) Mean Precipitation for Selected Stations (inches) Month Gibson City Rantoul Urbana Clinton Monticello Decatur October November December January February March April May June July August September 2.66 3.01 2.54 1.60 1.59 2.99 3.30 4.07 4.04 3.74 3.91 2.83 2.89 2.80 2.38 1.94 1.94 2.96 3.84 3.99 3.97 3.95 3.50 3.03 2.81 3.45 2.76 1.89 2.01 3.21 3.65 4.80 4.21 4.67 4.37 3.22 3.16 3.28 2.85 1.84 1.93 3.43 4.03 4.28 4.06 4.34 3.93 2.81 2.77 3.38 2.86 1.98 1.93 3.12 3.75 4.41 3.97 4.57 4.15 2.79 2.76 3.16 2.86 2.11 1.94 3.25 3.63 4.50 3.79 4.60 4.10 2.98 Annual 36.28 37.01 41.05 39.94 39.66 39.68 Table 6. Annual Precipitation for WY1993–2008 for Selected Stations (inches) Water year Gibson City Rantoul 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Urbana Clinton Monticello Decatur 51.78 36.00 40.53 33.85 36.01 37.51 30.30 27.21 34.01 41.09 32.87 37.80 38.22 36.84 37.14 52.25* 57.30 36.40 37.76 32.15 38.21 44.35 31.53 26.81 32.04 39.39 38.89 40.31 44.54 37.32 35.47 55.82 61.06 37.37 39.12 38.84 37.49 46.34 40.28 34.25 34.07 44.48 36.19 41.38 40.41 33.93 34.86 53.30 55.30 38.77 41.27 33.97 38.13 39.65 39.66 33.91 33.37 46.05 33.37 41.13 40.02 39.99 37.20 45.69 51.46 36.40 37.76 32.15 38.21 44.35 31.53 26.81 32.04 44.14 35.71 31.18* 30.14* 26.24* 29.66 56.55 52.35 34.35 36.30 39.06 30.17 38.90 34.54 29.52 38.03 46.93 33.59 37.94 42.19 36.51 31.87 59.95 15-yr mean 37.71 39.27 40.84 39.84 38.27 38.89 1971-2000 30-yr mean 36.28 37.01 41.05 39.94 39.66 39.68 Note: * Estimated record 26 70 Rantoul Urbana Clinton Gibson City Monticello Decatur 60 50 40 30 20 10 0 1993 1994 1995 1996 1997 1998 70 Precipitation (inches) 60 50 40 30 20 10 0 1999 70 2000 2001 2002 2003 2007 2008 * Monticello precipitation estimated - October 2003 through Oct 2006 60 50 40 * 30 * * 20 10 0 2004 2005 2006 Water Year Figure 15. Annual precipitation for WY1993–2008 27 (a) (b) Figure 16. Streamgaging equipment: (a) Leupold & Stevens data logger and (b) CR10X data logger stilling well. The stage was recorded using either a Leupold & Stevens data logger or a Campbell Scientific CR10X data logger/controller connected to an SM192 storage module (Figure 16a and 16b, respectively). Each station housed stage recording equipment in an ISWS-designed security shelter for protection from weather and vandalism. Station Site Descriptions. A detailed description of the location and period of record for each station follows. Refer to Figure 14 for the location of each station within the watershed. Figure 17 shows downstream and upstream views from each monitoring station. Long/Big Creek near Twin Bridge Road, Long Creek, IL (Station 101). The ISWS started monitoring this station in May 1993. The gage was located on Long Creek at Twin Bridge Road approximately 1.5 miles southeast of Long Creek, Illinois. The shelter and stilling well were located on the downstream bridge rail on the southernmost bridge pier, left descending bank. The station had a drainage area of 46.2 square miles. Friends Creek at Rt. 48 near Argenta, IL (Station 102). The USGS monitored Friends Creek from October 1966 through October 1982 with a graphic water-stage recorder (USGS #05572450). A Type A wire-weight gage also was installed. The graphic stage recorder was replaced with a digital water-stage recorder in July 1971. The USGS streamflow data are available online (http://waterdata.usgs.gov/nwis/discharge/?site_no=05572450). In May 1993, the ISWS began monitoring the same gage site, using the existing USGS steel stilling well, oil tube, and wire-weight gage. The gage on Friends Creek at Illinois Route 48 was approximately 0.5 miles east-northeast of Argenta, Illinois. The shelter and stilling well were located on the upstream bridge rail, right descending bank. The station had a drainage area of 111.9 square miles. Goose Creek near Deland, IL (Station 103). The Goose Creek station was a USGS gage from May 1951 through September 1959 (USGS #05571500), and those data are available online (http://waterdata.usgs.gov/il/nwis/uv?05571500). The ISWS conducted monitoring from May 1993 through September 2000. The ISWS gage was located on Goose Creek at Piatt County 28 Station 101: Long Creek at Twin Bridges Road in the town of Long Creek Station 102: Friends Creek near Argenta Station 103: Goose Creek near Deland Figure 17. Downstream (left) and upstream (right) views from stations in the study area 29 Station 104: Camp Creek near White Heath Station 105: Sangamon River southwest of Mahomet Station 106: Big Ditch near Fisher Figure 17. Continued 30 Station 111: Sangamon River near Monticello Station 112: Sangamon River near Fisher Figure 17. Concluded Road 600 East, approximately two miles southeast of DeLand, Illinois. The shelter and stilling well were located on the downstream bridge rail, right descending bank. The station had a drainage area of 45.1 square miles. Camp Creek near White Heath, IL (Station 104). The ISWS monitored the Camp Creek station from April 1993 through July 2002. The station was located on Camp Creek at Piatt County Road 1200 East, approximately two miles south of White Heath, Illinois. The shelter and stilling well were located on the downstream side of the bridge on the northern bridge pylon near the right descending bank. The station had a drainage area of 47.2 square miles. Sangamon River at Shively Bridge near Mahomet, IL (Station 105). The ISWS began monitoring at the Mahomet station in May 1993. The station was located on the Sangamon River at Champaign County Road 2000 North, approximately 2.5 miles southwest of Mahomet, Illinois. The shelter and stilling well were located on the downstream side of the bridge on the pylon nearest the right descending bank. The station had a drainage area of 368.2 square miles. 31 Big Ditch near Fisher, IL (Station 106). The ISWS began monitoring at Big Ditch in April 1993. The station was located on Big Ditch at Champaign County Road 700 East, approximately 3.5 miles south-southeast of Fisher, Illinois. The shelter and stilling well were located on the downstream side of the bridge in line with the pylon nearest the left descending bank. The station had a drainage area of 38.2 square miles. Sangamon River at Monticello, IL (Station 111). The USGS began streamflow monitoring at the Monticello station (USGS #05572000) in February 1908. The ISWS began monitoring water quality at this station in May 1993. The USGS streamflow data are available online (http://waterdata.usgs.gov/il/nwis/uv?05572000). The station is located on the Sangamon River at Bridge Street, west of Monticello, Illinois. Suspended sediment samples are collected by the ISWS using the single vertical method with a bridge-mounted DH-59 (depth-integrated sampler). The station has a drainage area of 543.4 square miles. Sangamon River at Fisher, IL (Station 112). The USGS began streamflow monitoring at the Fisher station (USGS #05570910) in September 1978. The ISWS monitored water quality at this station from April 1993 through July 2000. The USGS streamflow data are available online through September 2001 (http://waterdata.usgs.gov/il/nwis/uv?05570910). The station is located on the Sangamon River at U.S. Route 136 in Champaign County, east of Fisher, Illinois. The station has a drainage area of 245.6 square miles. Streamflow Streamflow data (discharge) are generated from the stage record collected at a gaging station. The stage-discharge rating relationship is developed by taking detailed discharge measurements in the stream at various known stages. Each measurement is plotted against the corresponding stage at which the discharge measurement occurred. A curve is developed to express the relationship between stage and discharge. Using this stage-discharge (rating) curve, the stage data are converted to discharge. Discharge data then are used to calculate runoff. During monitoring, the rating curve may require recalibration due to changes in the channel cross section caused by extreme streamflow events or human modifications to the stream channel geometry. In these cases, the stage-discharge curve is adjusted and applied only to the portion of the stage record affected by the disturbance. Methods used in this study to determine stream discharge followed established USGS procedures as outlined by Rantz (1982a, 1982b). Discharge data from the streamgaging stations at Monticello (111) and Fisher (112) were obtained from the USGS. Discharge. The following section presents annual discharge (streamflow) data for WY1993–2008. The annual discharges at all stations are summarized in Table 7 and presented in Figures 18 and 19. Figure 18 presents the stations located on the Sangamon River: Sangamon River near Fisher (112), Sangamon River near Mahomet (105), and Sangamon River at Monticello (111), and Figure 19 presents the stations located on tributaries of the Sangamon River: Long Creek (101), Friends Creek (102), Goose Creek (103), Camp Creek (104), and Big Ditch (106). Figure 14 shows the location of all these stations. Except for the two USGS stations located near Fisher and Monticello, the remaining six stations are partial datasets for WY1993, 32 Table 7. Annual Discharge for All Stations, WY1993–2008 Water year Station 101 Station 102 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2.9* 16.9 8.2 14.0 4.6 21.0 19.8 5.1 17.1 23.2 3.2 13.5 21.1 11.0 12.1 29.1 20.4* 47.2 34.3 23.1 23.0 46.2 27.3 21.2 25.6 49.5 13.8 41.5 46.0 27.1 54.8 53.1 Note: Annual streamflow (cfs * 1000) Station Station Station Station 103 104 105 106 Station 111 Station 112 8.6* 17.6 13.3 6.4 8.5 16.8 7.7 5.3 – – – – – – – – 383.8 247.2 187.5 114.4 136.3 247.3 111.7 41.0 120.7 243.0 78.9 219.6 213.0 87.0 177.0 317.4 182.0 101.9 91.2 58.5 66.1 99.0 51.2 12.0 55.7 92.7 37.2 85.9 93.6 41.8 100.5 143.0 10.6* 17.1 11.9 7.5 7.8 25.3 8.6 4.6 7.9 16.3 – – – – – – 102.2* 149.3 124.8 75.5 90.3 142.8 70.9 24.3 80.9 125.0 12.8 – – – – – – Incomplete data or no data available; * Partial water year, May – September 1993 only 33 10.8* 15.7 9.8 7.5 11.1 16.0 9.3 3.2 7.3 14.0 3.3 – – – – – 400 Sangamon River near Fisher Sangamon River near Mahomet Sangamon River at Monticello Annual Discharge (cfs x 1000) 350 + Data only during May 1993 - Sept 1993 300 250 200 150 100 + 50 0 1993 1994 1995 1996 1997 1998 1999 2000 400 * Indicates end of WY; incomplete data Annual Discharge (cfs x 1000) 350 300 250 200 150 100 50 * 0 2001 2002 2003 2004 2005 Water Year 2006 2007 Figure 18. Annual discharge for river stations WY1993–2008 34 2008 60 Long Creek Friends Creek Goose Creek Camp Creek Big Ditch Annual Discharge (cfs x 1000) 50 + Data only during May 1993 - Sept 1993 40 30 + 20 10 + ++ * + 0 1993 1994 1995 1996 1997 1998 1999 2000 60 * Indicates end of WY; incomplete data Annual Discharge (cfs x 1000) 50 40 30 20 * 10 * 0 2001 2002 2003 2004 2005 Water Year 2006 2007 Figure 19. Annual discharge for tributary stations WY1993–2008 35 2008 where the monitoring period covered only May 1993 through September 2008. The complete WY1993 dataset for Monticello (111) and Fisher (112) was available from the USGS. The mean daily and monthly discharge, as well as monthly runoff, can be found in Appendix D. Figure 18 shows Monticello consistently has the highest annual discharges and Fisher has the lowest, which is a function of drainage area. The highest annual discharges were during WY1993 and 2008, which is expected based on the annual precipitation data (Figure 15). Due to the monitoring period beginning within WY1993, the Mahomet station is incomplete. The next highest annual discharges occurred in WY1994, 1998, and 2002, which occurred in the near normal range based on annual precipitation data. The lowest annual discharges occurred in WY2000. This pattern is similar with the annual precipitation, which should be expected. Figure 19 shows the annual discharge for the tributary stations. Friends Creek has the highest discharge due to a drainage area over twice the size of the other four tributary watersheds. However, unlike the river stations, the remaining four tributary stations do not differentiate themselves by drainage area, but tend to reflect the spatial influence of precipitation patterns on smaller watersheds. Runoff. As seen from the annual discharge data, discharge is a function of drainage area, which makes the comparison of streamflow between stations problematic. Runoff is a normalized measure of streamflow per unit watershed area, which allows for an improved comparison of streamflow and precipitation records between stations. Runoff is computed by dividing monthly discharge by the drainage area upstream of the streamgaging station and then converting the result to inches. Runoff can still somewhat vary between stations due to the spatial variability of precipitation patterns across the watershed and drainage characteristics. Table 8 summarizes the annual runoff for each station during the 15-year monitoring period. Annual data for WY1993 to 2008 at river and tributary stations are presented in Figures 20 and 21, respectively. For all tributary stations (101, 102, 103, 104, 106) and one river station (105), WY93 is incomplete and runoff values are for May through October 1993. Runoffs between river stations (Figure 20) are generally within 1 inch of each other except during the high rainfall years. Extremely high runoff occurred during WY1993 and 2008 with over 26 and nearly 22 inches, respectively. These years experienced mean annual precipitation of over 15 inches above the 30-year mean. Water years 1994, 1998, 2002, 2004, 2005, and 2007 show runoff at many of the river stations near or over 14 inches when annual precipitation was generally several inches above the 30-year mean. Thus, 8 of the 15 years experienced above or extremely above normal precipitation (Table 8). In general, the other water years varied from 6 to 10 inches of runoff. WY2000 runoff, the driest of the monitoring period, was between 1 to 3 inches. The next lowest annual runoff occurred in WY2003 and 2006. The highest annual runoff occurred in WY1993 at Fisher and Monticello with 27.79 and 26.49 inches, respectively. Figure 21 shows more variability in runoff among the tributary stations than river stations. Variability is usually due to precipitation patterns in terms of watershed proximity and intensity. As was seen in the river stations, the higher runoffs occurred in WY1994, 1998, 2002, 2005, and 2008. Runoff in WY2008 was nearly the same as the river stations, averaging over 23 inches. The lowest runoffs occurred in WY2000 and 2002 with approximately 4 inches or less. 36 Table 8. Annual Runoff for All Stations, WY1993–2008 Annual Runoff, inches Station Station Station 104 105 106 Water year Station 101 Station 102 Station 103 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2.35* 13.70 6.64 11.34 3.72 17.04 16.07 4.15 13.91 18.84 2.58 10.93 17.09 8.94 9.80 23.60 6.84* 15.83 11.51 7.74 7.70 15.47 9.15 7.12 8.58 16.59 4.64 13.92 15.43 9.08 18.35 23.13 7.16* 14.59 11.04 5.30 7.08 13.96 6.37 4.41 – – – – – – – – Note: * Partial water year, May – September 1993 only – Incomplete data or no data available 8.43* 13.60 9.43 5.99 6.22 20.10 6.82 3.64 6.28 12.93 – – – – – – 37 10.41* 15.20 12.71 7.69 9.20 14.54 7.22 2.47 8.24 12.73 1.31 – – – – – 10.63* 15.41 9.59 7.39 10.86 15.72 9.08 3.15 7.19 13.69 3.28 – – – – – Station 111 Station 112 26.49 17.06 12.94 7.89 9.41 17.06 7.71 2.83 8.33 16.77 5.44 15.16 14.70 6.01 12.21 21.91 27.79 15.56 13.93 8.94 10.09 15.11 7.82 1.36 8.51 14.16 5.68 13.12 14.29 6.38 15.35 21.83 28 Sangamon River near Fisher Sangamon River near Mahomet Sangamon River at Monticello 26 24 22 + Data only during May 1993 - Sept 1993 Annual Runoff (inches) 20 18 16 14 12 10 + 8 6 4 2 0 1993 1994 1995 1996 1997 1998 1999 2000 28 * Indicates end of WY; incomplete data 26 24 22 Annual Runoff (inches) 20 18 16 14 12 10 8 6 4 * 2 0 2001 2002 2003 2004 2005 Water Year 2006 2007 Figure 20. Annual runoff for river stations WY1993–2008 38 2008 24 Long Creek Friends Creek Goose Creek Camp Creek Big Ditch 22 20 Annual Runoff (inches) 18 + Data only during May 1993 - Sept 1993 16 14 12 + 10 + 8 ++ 6 * 4 2 + 0 1993 1994 1995 1996 1997 1998 1999 2000 2004 2005 Water Year 2006 2007 2008 24 * Indicates end of WY; incomplete data 22 20 Annual Runoff (inches) 18 16 14 * 12 10 8 6 4 * 2 0 2001 2002 2003 Figure 21. Annual runoff for tributary stations WY1993–2008 39 It should be noted that during the monitoring period, Friends Creek occasionally received water pumped from the DeWitt County groundwater well-fields to augment the drinking water supply in Lake Decatur due to very low rainfall conditions. The well fields are upstream of the Friends Creek station. These periods included 51 days, from January 1 through February 20, 2000, at an average pumping rate of 10.34 cubic feet per second (cfs) per day; 63 days from September 2, 2005 through November 4, 2005, at an average of 15 cfs per day; and 39 days from September 18, 2007 through October 26, 2007, with an average of 13.93 cfs per day. This additional flow volume usually accounted for approximately 5–6 percent or less of the annual runoff at the Friends Creek station. Nitrate-N Monitoring Nitrate-N samples were collected weekly at all eight stations during the period of record. Three stations, Long Creek (101), Friends Creek (102), and Monticello (111), had nitrate-N data collected for the entire study period. Weekly samples were collected unless the stream was pooled or ice-covered. Efforts were made to visit sites more often during storm events. Water temperature and pH of each bulk sample were also recorded in the field. Over the course of the 15-year study, periodic water quality sampling was conducted at other locations throughout the watershed; those results can be found in previous ISWS reports (Demissie and Keefer, 1996; Keefer et al., 1996; Keefer and Demissie, 1999, 2000, and 2002; Keefer and Bauer, 2005 and 2008). Sample Collection, Preservation, and Handling All water samples were collected in a 1-liter glass jar held inside an aluminum frame basket that was lowered on a rope into the stream at the midpoint of the channel where the stream velocity is greatest. Samples were then brought back to the field vehicle for preparation. A water temperature reading was recorded and the water sample was transferred to a 60-mL polyethylene bottle and labeled. The station number, sample number, date and time of collection, and water temperature were recorded. The sample bottle was placed in a cooler kept at <4◦ C and transported to the laboratory for analysis. pH was added to the data collection activities in the spring of 2001. pH and temperature of the bulk sample were measured at the same time, shortly after collection from the stream. pH was measured with a Corning 313 pH/temperature probe, which was calibrated at the beginning of each field day according to instrument document specifications. Temperature of the bulk sample was measured with a liquid-in-glass thermometer or the Corning 313 pH/temperature probe. Analytical Methods and QA/QC Procedures The analysis of the nitrate-N samples followed the Illinois Environmental Protection Agency (IEPA) method number 300.0, Ion Chromatography. A more thorough discussion of the methods involved in this study can be found in Demissie and Keefer (1996). The collection of water samples for water quality analysis followed several quality assurance/quality control (QA/QC) procedures. Each glass sample jar used to collect samples 40 from the stream was first rinsed with deionized water and then resident stream water before the actual sample was collected at each station. This prevented cross-contamination among stations. Each polyethylene bottle used for storing samples was pre-cleaned according to the IEPA method specifications and never reused. Every week, one field blank was taken to determine if contamination of the sample bottles had occurred. This consisted of pouring deionized water into the glass bottle used to collect samples in the field, then processing the water like a normal sample. One out of every 10 samples was analyzed in duplicate to provide a test of laboratory precision. To evaluate the sample matrix, one out of every 10 samples the laboratory analyzed was spiked with a known amount of nitrate and the recovery monitored. Blanks and spiked blanks were also carried throughout the procedure. To evaluate instrument calibration, separate-source and same-source check solutions/standards were analyzed. The minimum concentration of a substance is delineated by the method detection limit (MDL). The MDL is defined as that analyte concentration that can be measured and reported with 99 percent confidence that the analyte concentration is greater than zero and is determined from analysis in a given matrix of a sample containing the analyte. MDL’s were determined according to EPA protocol 40 CFR Part 136, Appendix B. Seven replicate aliquots of spiked reagent water were processed through the entire analytical method. The MDL was calculated as: MDL = (t) x (S), where t = the student's t value for a 99 percent confidence level and a standard deviation estimate with n-1 degrees of freedom [t = 3.14 for seven replicates], and S = the standard deviation of the replicate analyses. The MDLs for this project varied throughout the 15year monitoring period and ranged from 0.02 to 0.13 mg/L. In Appendix E, a nitrate-n value that reflects a concentration at the MDL is identified by the less-than sign (<) to the left of the value. The analytical methods and laboratory procedures in the ISWS Champaign Laboratory, Analytical Services Group, can be found on file with the Center for Chemistry and Technology (ISWS, 2007). Nitrate-N Concentrations The nitrate-N concentration data collected at the eight network stations for the entire monitoring period are located in Appendix E of this report. Figures 22 and 23 show the annual minimum, mean, and maximum nitrate-N concentrations during the 15-year study period at the Sangamon River, including Lake Decatur at the South Water Treatment Plant (SWTP), and tributary stations, respectively. Water Year 1993 data are from May 1993 to September 1993 only. A table of the annual minimum, mean, and maximum values appears in Appendix F. As can be seen in Figure 22, the minimum nitrate-N concentrations for all the river stations were very low for all years except WY1993 when concentrations ranged from 4 to 5 mg/L. Lake Decatur at the SWTP had slightly higher minimum concentrations than the river stations all years except WY1993. All the mean nitrate-N concentrations were below the maximum contaminant level (MCL) of 10 mg/L for the entire monitoring period. The highest mean concentrations occurred at the Sangamon River near the Mahomet station in WY1997 and 2002, 9.45 and 9.06 mg/L, respectively. In general, all stations seem to follow a similar pattern in mean and maximum concentrations from year to year. Also, Lake Decatur at the SWTP 41 25 20 Sangamon River near Fisher Sangamon River near Mahomet Sangamon River at Monticello Lake Decatur SWTP a) Minimum Concentration 15 10 5 0 25 Nitrate Concentration (mg/L) b) Mean Concentration 20 15 10 5 0 25 c) Maximum Concentration 20 15 10 5 0 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Water Year Figure 22. Annual nitrate-N concentrations in the Sangamon River stations and Lake Decatur: a) minimum, b) mean, and c) maximum 42 25 a) Minimum Concentration 20 15 Long Creek Friends Creek Goose Creek Camp Creek Big Ditch 10 5 0 25 Nitrate Concentration (mg/L) b) Mean Concentration 20 15 10 5 0 25 c) Maximum Concentration 20 15 10 5 0 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Water Year Figure 23. Annual nitrate-N concentrations in the tributary stations: a) minimum, b) mean, and c) maximum 43 is consistently lower than Monticello, and Monticello is lower than Fisher, with Mahomet showing the most variability. Except for WY1994 and 1995, the annual maximum concentrations exceeded the MCL for most of the monitoring period at all river stations. Lake Decatur exceeded the MCL 9 of the 15 years (WY1996–1999, WY2001–2002, WY2004, and WY2007–2008). The highest maximum concentration occurred in WY2000 at the Mahomet and Fisher stations with 16.91 and 16.86 mg/L, respectively. The minimum nitrate-N concentrations at the tributary stations shown in Figure 23 are similar to the river stations with levels well below 1 mg/L except in WY1993. Big Ditch and Camp Creek are the only stations where the mean concentrations exceeded the MCL (WY1996, 1997, 2002, and 2003). The Long and Friends Creek stations tended to have the lowest annual mean and maximum nitrate-N concentrations, with Big Ditch having the most variability with mean and maximum concentrations ranging from 4.98 to 12.40 and 11.02 to 25.20 mg/L, respectively. All tributary station annual maximum concentrations exceeded the MCL except in WY2005. Between WY1993 and WY2003, Long Creek appears to have the least variability in annual maximum concentrations. Nitrate-N Yields Nitrate-N concentrations are used for regulatory purposes but are insufficient to determine the relative contribution of nitrate-N from different areas. Determining the volume of nitrate-N (load) transported out of a watershed is a better way to formulate management alternatives than concentration. Load is the total mass or volume that is transported by a stream from a given point for a specified period of time and calculated as the product of nitrate-N concentration and discharge. Comparing total nitrate-N load from different watersheds over time is problematic because load is proportional to the watershed area being monitored. Therefore, load was converted to pounds of nitrate-N per year and then normalized per unit area (acres) to determine the nitrate-N yield per acre from the watershed above each monitoring station (Keefer, 2003). Computing yields provides an improved understanding of the relative contribution of nitrate-N from different watersheds. Nitrate-N yield was calculated for each month as the product of the monthly average nitrate-N concentrations and total monthly discharge the divided by the monitored watershed area. The annual yield is the sum of the monthly yields. Figures 24 and 25 present the annual nitrate-N yields, in water years, during the 15-year study period at the Sangamon River and tributary stations, respectively. Table 9 presents the annual nitrate-N yields for all stations in the watershed during their monitoring period, as well as the weighted annual yield into Lake Decatur. Unlike the annual discharge and runoff values for Fisher and Monticello during WY1993, annual nitrate-N yields are only computed from May 1993 through September 1993. Streamflow data were available for those stations from the USGS; however, nitrate-N concentration data are only available from May 1993. Therefore WY1993 is a partial year. Annual nitrate-N yields varied from approximately 5 to 41 pounds per acre (lb/acre) at the river stations (Figure 24 and Table 9). Water years 1998, 2002, and 2008 stand out with the highest annual yields, averaging 35, 36, and 37 lb/acre, respectively. Monticello had the highest annual yield of 41 lb/acre in WY2002 and Mahomet had the lowest 44 55 Sangamon River near Fisher Sangamon River near Mahomet Sangamon River near Monticello 50 + Data only during May 1993 - Sept 1993 Annual Nitrate-N Yield (lb/acre) 45 40 35 30 25 20 + 15 + + 10 5 * 0 1993 1994 1995 1996 1997 1998 1999 2000 55 * Indicates end of WY; incomplete data 50 Annual Nitrate-N Yield (lb/acre) 45 40 35 30 25 20 15 10 5 * 0 2001 2002 2003 2004 2005 Water Year 2006 2007 2008 Figure 24. Annual nitrate-N yield for Sangamon River stations during WY1993–2008 45 55 50 45 Annual Nitrate-N Yield (lb/acre) + Data only during May 1993 - Sept 1993 Long Creek Friends Creek Goose Creek Camp Creek Big Ditch 40 35 30 + 25 20 + + 15 + * 10 5 + 0 1993 1994 1995 1996 1997 1998 1999 2000 2004 2005 Water Year 2006 2007 2008 55 * Indicates end of WY; incomplete data 50 Annual Nitrate-N Yield (lb/acre) 45 40 * 35 30 25 20 15 10 5 * 0 2001 2002 2003 Figure 25. Annual nitrate-N yield for tributary stations during WY1993–2008 46 Table 9. Annual Nitrate-N Yields in the Lake Decatur Watershed for the 15-Year Study Period Water year (annual nitrate-N yield, lb/acre) 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Mean Drainage area (acres) 1993* Percent area of Lake Decatur watershed Tributary Long Creek (101) Friends Creek (102) Goose Creek (103) Camp Creek (104) Big Ditch (106) Annual average 6 13 16 18 26 16 27 27 26 26 25 26 14 24 25 22 29 23 23 20 13 18 29 21 7 17 15 13 31 17 39 39 36 47 43 41 37 27 19 20 23 25 4 15 12 9 8 10 29 18 15 25 22 35 41 36 34 36 3 9 1 4 25 28 26 28 24 26 18 16 17 19 33 26 50 48 49 23 25 20 22 25 5.0 12.2 4.9 5.2 4.2 29,539 71,647 28,892 30,242 24,421 Sangamon River Fisher (112) Mahomet (105) Monticello (111) Annual average 17 19 16 17 22 20 23 22 28 26 31 28 19 17 24 20 21 18 19 19 35 33 36 35 21 19 20 20 4 4 6 5 17 19 18 31 41 36 2 8 5 28 28 26 26 12 12 24 24 37 37 21 19 23 26.8 40.2 59.3 157,177 235,653 347,747 13 25 25 23 15 37 25 6 21 39 7 27 26 14 24 42 23 76.5 586,868 Station name 47 Weighted annual yield into Lake Decatur** Notes: - No data available * Partial water year, May – September 1993 only ** Area-weighted using Long Creek, Friends Creek, and Monticello stations with 4 lb/acre in WY2000. WY2000 had the lowest annual runoff at river stations during the monitoring period but WY2002 was not the highest annual runoff (WY1993 was highest). However, the maximum nitrate-N concentrations at Monticello were around 15 mg/L in WY2002, which would account for higher yields. Figure 25 also shows the highest annual yields at tributary stations were WY1998, 2002, and 2008 averaging 41, 36, and 49 lb/acre, respectively. The highest annual nitrate-N yield occurred at Long Creek in WY2008 (50 lb/acre). Big Ditch had the lowest yield in WY2003 (1 lb/acre). Water year 2008 had the highest tributary runoff during the monitoring period and WY2003 had the lowest annual runoff. Table 9 shows the 15-year mean annual nitrate-N yield at the tributary and river stations and nitrate-N delivered (yield) to Lake Decatur. The 15-year mean annual nitrate-N yield at the three stations with records during the entire period are very close, ranging from 23 to 25 lb/acre, even though there were variations between river and tributary stations within any water year. The yield into Lake Decatur was computed using the Long Creek, Friends Creek, and Monticello annual nitrate-N yield data and weighting them based on watershed area. This allows for a reasonable approximation of the nitrate-N delivered to Lake Decatur. The 15-year mean annual nitrate-N yield is 23 lb/acre. During the monitoring period the annual yields varied from 7 lb/acre (WY2003) to 42 lb/acre (WY2008). Flow-Weighted Nitrate-N Concentration Flow-weighted concentration is useful for detecting changes over time. The flowweighted concentration for nitrate-N was determined by summing the product of the monthly average nitrate-N concentrations and the monthly total streamflow, and then dividing that value by the total annual streamflow. The annual average data for rainfall, streamflow, runoff, flowweighted nitrate-N concentrations, and nitrate-N yield for the 15-year monitoring period at Monticello, Friends Creek, and Long Creek are presented in Tables 10–12, respectively. The runoff, nitrate-N yields, and flow-weighted nitrate-N concentrations for all three stations are plotted in Figure 26. The Monticello (111) station monitors a 543.4 square-mile drainage area, which represents approximately 60 percent of the Lake Decatur watershed with Friends and Long Creeks representing 12 and 5 percent of the watershed, respectively. Approximately 77 percent of the watershed is represented by these three stations. The Sangamon River at Monticello station (111) is operated by the USGS (05572000) with cooperative funding from the City of Decatur, and has a 100-year streamflow record (1908– 2008) with a long-term mean annual streamflow of 424 cfs (Table 10). Due to an extremely long streamflow record that represents more than half the watershed, the Monticello station is considered fairly representative of annual discharge into Lake Decatur. This station also has a complete discharge record for WY1993 and is presented in Table 10 to give context of streamflow for the monitoring period within the larger record. The greatest annual streamflow during the monitoring study was 1,052 cfs in WY1993, over two-and-one-half times the longterm mean. This streamflow was the second highest recorded streamflow since 1908, and the WY2008 streamflow (867 cfs, twice the long-term mean) was the third highest recorded. It should be noted that the 10th and 11th highest recorded streamflow also occurred during the monitoring period for this study (WY1994 and 1998, respectively). The lowest streamflow 48 Table 10. Summary of Rainfall, Streamflow, Flow-Weighted Nitrate-N Concentration, and Nitrate-N Yield for the Sangamon River at Monticello (111) for WY1993–2008 Water year (Oct-Sept) 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 15-year mean (1993-2008) Long-term mean (1908-2008) Annual mean streamflow (1000 x cfs) Annual runoff (inches) Flow-weighted nitrate-N concentration (mg/L) 51.5 34.4 41.1 36.7 33.2 43.0 37.6 31.5 25.4 41.2 35.7 ^31.2 ^30.1 ^26.2 29.7 +56.6 1,052 677 514 312 373 677 306 112 331 666 216 600 584 238 485 867 *26.5 17.1 12.9 7.9 9.4 17.1 7.7 2.8 8.3 16.8 5.4 15.2 14.7 6.0 12.2 21.9 *10.3 5.9 7.4 8.4 8.3 9.4 11.4 8.8 9.6 10.8 9.5 8.1 8.0 9.0 8.8 7.3 *16 23 31 24 19 36 20 6 19 41 8 28 26 12 24 37 36.6 501 12.6 8.8 23 - 424 10.5 Total annual rainfall (inches) Annual nitrate-N yield (lb/acre/yr) - Notes: * Data only for May–September 1993. ^ Average of precipitation from Gibson City, Urbana, Clinton, and Rantoul weather stations. + Some data from CoCoRas precipitation database. 49 - Table 11. Summary of Rainfall, Runoff, Flow-Weighted Nitrate-N Concentration, and Nitrate-N Yield for the Friends Creek at Argenta (102) for WY1993–2008 Annual runoff (inches) Flow-weighted nitrate-N concentration (mg/L) Annual nitrate-N yield (lb/acre/yr) *56 129 94 63 63 126 75 +58 70 136 38 114 +126 +74 +150 +189 *6.8 15.8 11.5 7.7 7.7 15.5 9.2 +7.1 8.6 16.6 4.6 13.9 +15.4 +9.1 +18.4 +23.1 *7.7 7.7 9.3 11.6 10.0 11.1 12.9 9.6 10.1 11.5 8.8 8.9 7.4 8.6 8.1 8.5 *13 27 24 20 17 39 27 15 18 41 9 28 24 16 33 48 98 11.9 9.5 25 Water year (Oct-Sept) Total annual rainfall (inches) Annual mean streamflow (1000 x cfs) 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 52.4 34.4 36.3 39.1 30.2 38.9 34.5 29.5 38.0 46.9 33.6 37.9 42.2 36.5 31.9 60.0 15-year mean (1993-2008) 38.9 Notes: * Data only for May–September 1993. + Dewitt County well fields were pumping for some period during these years. 50 Table 12. Summary of Rainfall, Runoff, Flow-Weighted Nitrate-N Concentration, and Nitrate-N Yield for the Long Creek at Twin Bridge Road (101) for WY1993–2008 Annual runoff (inches) Annual nitrate-N yield (lb/acre/yr) Water year (Oct-Sept) 1993* 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 52.4 34.4 36.3 39.1 30.2 38.9 34.5 29.5 38.0 46.9 33.6 37.9 42.2 36.5 31.9 60.0 3 17 8 14 5 21 20 5 17 23 3 13 21 11 12 29 *3.3 16.3 6.6 11.3 3.7 17.0 16.1 4.2 13.1 18.8 2.6 10.9 17.1 8.9 9.8 23.6 *7.7 7.1 9.1 9.1 8.8 10.2 10.3 4.6 9.8 8.8 6.2 10.0 7.4 8.9 8.1 10.0 *6 26 14 14 7 39 37 4 29 36 4 25 28 18 19 50 38.9 14 12.0 8.5 23 15-year mean (1993-2008) Annual mean streamflow (1000 x cfs) Flow-Weighted nitrate-N concentration (mg/L) Total annual rainfall (inches) Notes: *Data only for May–September 1993. 51 20 16 Annual Runoff (inches) and Nitrate-N Yield (lb/acre/year) 12 50 8 40 4 Flow Weighted Average Nitrate-N Concentration (mg/L) Flow-weighted Concentration: Long Creek Flow-weighted Concentration: Friends Creek Flow-weighted Concentration: Sangamon River Runoff: Long Creek Runoff: Friends Creek Runoff: Sangamon River Load per acre: Long Creek Load per acre: Friends Creek Load per acre: Sangamon River 30 20 10 0 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Water Year Figure 26. Runoff, nitrate-N yield, and flow-weighted nitrate-N concentration for the Long Creek, Friends Creek, and Sangamon River at Monticello and for the 15-Year Study Period (WY1993–2008) during the monitoring period was WY2000 (112 cfs), and was the fourth lowest annual mean streamflow for the 100-year record. Based on this record, it appears that the monitoring period had some of the higher mean annual streamflows in the past 100 years. As can be seen in Figure 26 and Tables 10–12, between WY1993 and WY1994, the flowweighted nitrate-N concentrations at Monticello (111) decreased from 10.3 to 5.9 mg/L then steadily increased to 11.4 mg/L in WY1999. There was a slight drop and then rise to 10.8 mg/L in WY2002, but then nitrate-N steadily decreased to 7.3 mg/L over the remainder of the monitoring period (Figure 26). The 15-year mean annual flow-weighted nitrate-N concentration is 8.8 mg/L. Friends Creek annual runoff and flow-weighted nitrate-N concentrations had very similar patterns and fluctuations during the monitoring period. Friends Creek had higher flowweighted concentrations from WY1994 through WY2002, and had the highest levels of all stations (12.9 and 11.6 mg/L in WY1999 and WY1996, respectively). Long Creek flowweighted nitrate-N concentrations were more dynamic over the 15-year monitoring period (Figure 26). During the low runoff years of WY2000 and WY2003, Long Creek flow-weighted concentrations were the lowest of the period. From WY2005 through WY2007, flow-weighted concentration values were very close between the stations as opposed to the previous years when there was generally a 1–2 mg/L difference. Annual flow-weighted nitrate-N concentrations vary year-to-year for all stations, but no longer-term trends are apparent over the course of the 15-year monitoring period (Figure 26). 52 Trends Investigation The 15-year dataset allowed for an investigation into possible trends in nitrate-N to provide information to the City of Decatur for consideration in making future drinking water management decisions. This dataset has already assisted the city in the design of the ion exchange facility that removes nitrate-N from Lake Decatur water supplies for finished potable water. The data were also used in developing a nitrate-N concentration prediction tool for optimal operation of that facility (Markus et al., 2003). To investigate possible trends in the Lake Decatur watershed annual data, as well as complement and contrast data and trends in the entire Sangamon River watershed, this 15-year dataset (WY1994–2008) was augmented by data from the Sangamon River near Oakford station, which has longer-term nitrate-N data (WY1975– 2006). In general, the statistical analysis shows no significant trends in discharge and nitrate-N yields in the Sangamon River watershed during the WY1994–2008 or WY1975–2006 periods. A significant increasing trend was detected at Sangamon River at Monticello (111) for nitrate-N concentration. However, this is the only station in the Sangamon River watershed exhibiting this trend. This chapter presents the statistical approach and analyses for these results. Data The records from three of the eight monitoring project stations were selected for statistical analysis: Long Creek at Twin Bridge Road (101), Friends Creek near Argenta (102), and Sangamon River at Monticello (111). Those project stations have the longest record period for streamflow, nitrate-N concentration, and nitrate-N yield observations (WY1994 to WY2008). Descriptions of data sources, computations, and discussion of the station data can be found in previous sections of this report. The USGS Sangamon River streamgaging station near Oakford (#05583000) was added to augment the analyses to possibly infer longer-term trends for the Lake Decatur watershed. The Oakford station has a 32-year nitrate-N data record (WY1975–2006), is downstream of the Lake Decatur watershed, and is nearly five times the drainage area of the Lake Decatur watershed. These data were collected less frequently than the data in this study; however, previous work by Guo et al. (2002) showed that lower frequency data collected over much longer time periods reliably computes average annual yields as compared to shorter periods with more frequent data. Therefore, all statistical analyses used annual data to determine possible trends. At the time these analyses were performed, data during WY2007–2008 for the Oakford station was not available. Although the overlapping data periods for the project (WY1994–2008) and Oakford (WY1994–2006) stations are different, using WY2007–2008 data from the project stations was deemed to be beneficial because these included all available data from the project. The Oakford station is part of the Illinois Environmental Protection Agency (IEPA) Ambient Water Quality Monitoring Network (AWQMN), and station descriptions and background can be found in Short (1999). Figure 27 shows the location of all four stations and Table 13 lists the station numbers, locations, periods of record, and drainage areas. 53 r iv e sR oi I ll in k ree C t S al Oakford Sa n g am Friends Creek Lake Decatur Watershed Monticello on R iver Long Creek Sangamon River Watershed 0 5 10 20 Miles Figure 27. Map of stations used in statistical analyses Table 13. Station Number, Name and Location, Period of Record, and Drainage Area Used in Trend Analysis ISWS station number USGS station number 111 102 101 05583000 05572000 - Stream name Sangamon River near Oakford Sangamon River at Monticello Friends Creek Long Creek 54 Period of record (water years) Drainage area (mi2) 1975-2006 1994-2008 1994-2008 1994-2008 5034 543.4 111.9 46.2 The annual average discharge values for all stations were calculated by averaging daily values over the entire water year; the annual total yields were calculated as a sum of daily yields; and the annual average nitrate concentration was calculated as an average of the observed concentration values within each water year. The monthly nitrate-N yields, such as the yields for January 1994, were calculated as a sum of daily yields within that month. The mean monthly yields for January, however, are calculated as an average of 15 monthly yields between January 1994 and January 2008. The mean monthly nitrate concentration was calculated similarly by averaging the observed concentration values within each month and each year, and then by averaging all 15 monthly values for each of the 12 months. Nitrate-N yield calculations for the three project stations were based on the monthly weighted average method. Monthly weighted average yields are calculated as products of the total monthly discharge and the monthly average nitrate-N concentrations as reported by Demissie and Keefer (1996). For the Oakford station, the calculated yields were adopted from Short (1999) and Markus et al. (2009) and were based on the seven-parameter log-linear model (Cohn et al., 1992; Guo et al., 2002). The seven-parameter log-linear model requires the estimation of seven parameters: a constant; a quadratic fit to the logarithm of discharge (two parameters); a quadratic fit to time (two parameters); and a sinusoidal function to remove the effects of annual seasonality (two parameters). Statistical Approach There are two main modeling approaches which can be used for detecting trends in water quality studies: physical and statistical modeling. Physical watershed models are typically derived from a strong theoretical base and have a potential to capture underlying processes and relationships. Those models also require preparation of large input datasets and have a lengthy calibration and validation process. Statistical models have less stringent data requirements than physical models, but often have more strict statistical assumptions, such as normality, independence, and constant residual variance. More importantly, statistical models have an ability to identify relationships in complex multivariate hydrologic systems that are not easily detected using physically-based models. For its relative simplicity and potential to detect unknown trends and relationships, a statistical modeling approach was adopted for this project. To increase the likelihood of detecting trends, the project dataset (WY1994–2008) was augmented by a longer (32-year) data record (WY1975–2006) from the Oakford station. The augmented dataset allowed for an assessment of possible spatial and temporal (long-term annual and seasonal) trends. The latter portion of the Oakford data record closely overlaps that of the three project stations and extends for 19 years prior to the project data period. This data overlap could then make it possible to imply longer-term project station trends using the 32-year data record if similar trend relationships are found among the three project and Oakford stations for that overlapping data period. Therefore, the statistical analysis took the approach of comparing possible annual and monthly trends in streamflow, nitrate-N concentrations, and nitrate-N yields during the latter time period (WY1994–2008) to detect similar trend relationships among all four Sangamon River watershed stations. Statistical analyses for longer-term trends were also performed on the Oakford station 32-year data record for the purpose of inferring long-term trends in the Lake Decatur watershed. Furthermore, the statistical analysis results for annual and 55 monthly relationships among all four stations during the overlapping and longer-term data periods were utilized to perform a preliminary investigation on the effects of watershed size on streamflow, nitrate-N concentration, and nitrate-N yields. Statistical Methods Different trend tests applied to the same dataset frequently produce variable results due to different methodologies and assumptions of each test. To avoid creating a bias based on selection of any single test, statistical significance of trends in this project was evaluated using three statistical tests. Those tests are used to determine if significant trends exist in the calculated annual average concentration, total yield, and average discharge. The following tests were used: the non-parametric Kendall’s Tau test (Kendall, 1955; Helsel and Hirsh, 1995), the parametric ttest on the slope of the linear regression relationship between the annual series (discharge, nitrate-N concentration, and nitrate-N yields) and time (Salas, 1993), and the non-parametric Hotelling-Pabst test (Conover, 1980). The tests for significance levels of 70, 80, 90, and 95 percent are performed in this study. In hydrologic practice, statistically significant trends are those passing trend tests with significance levels usually of 95 percent, and at times 90 percent. Those trends not passing trend tests with significance levels of 90 or 95 percent are considered statistically insignificant, even if they pass tests for significance levels of 70 or 80 percent. Nonetheless, the trend test results for lower significance levels (<90 percent), although not used to determine statistically significant trends, were provided here for reference. The three tests were applied to the three project gaging records, Long Creek (101), Friends Creek (102), and Sangamon River near Monticello (111), for WY 1994–2008 and the Sangamon River near Oakford station for WY1994–2006 and WY1975–2006 time periods. The statistical significance for the three tests was applied to the annual average discharge, nitrate-N concentration, and nitrate-N yield data during the overlapping (WY1994–2008) and longer-term (WY1975–2006) data periods. Statistical Results Table 14 presents the results of the trend analysis, with indications of the occurrence or absence of statistically significant trends within the flow quantity and quality records. Statistically significant trends in discharge, concentration, or yield were not detected at Long Creek (101) and Friends Creek (102). However, all three statistical trend tests indicated that the annual average nitrate-N concentration at Monticello (111) has been increasing since WY1994 with a significance level of 90 and 95 percent. At the same time, discharge and nitrate-N yields at this station did not exhibit a statistically significant trend, similar to Long Creek (101) and Friends Creek (102). For the overlapping period (WY1994–2006), the Oakford analysis was similar to Long Creek (101) and Friends Creek (102) results showing no trend in each of the three variables. The trend results for the overlapping data period were similar for the three project and Oakford stations for discharge and nitrate-N yields except for the increasing trend for nitrate-N concentration at the Sangamon River at Monticello station. 56 Table 14. Significant Trends Based on Kendall-Tau Test (Orange), T-Test (Blue), and Hotelling-Pabst Test (Grey), for Variable Confidence Levels The Oakford station longer-term dataset (WY1975–2006) exhibited a possible decrease in discharge as indicated by two out of three tests. For discharge at the Oakford station, two nonparametric trend tests (Kendall-Tau and Hotelling-Pabst) produced identical results, indicating a significant trend with 90 percent confidence level, while the third parametric t-test produced a much lower confidence level, indicating no trend. There were no trends for nitrate-N yields at the Oakford station for both the overlapping and longer-term time periods. The project stations also showed no trends for yields during the overlapping time period. Therefore, it may be speculated that there has been no significant trend for nitrate-N yields in the Lake Decatur watershed previous to the monitoring period (WY1994– 2008). During the overlapping time period, three of the four stations (Long Creek (101), Friends Creek (102), and Oakford) also showed no evidence of statistically significant trends in nitrate-N concentration and discharge. Therefore, at these three stations it can be concluded that discharge, concentration, and yield trends were absent within the overlapping period (WY-1994–WY2008). Spatial and Temporal Variability To better understand any spatial and temporal variability of nitrate-N concentrations in the Sangamon River watershed, the annual average nitrate-N concentrations were compared over 57 each of the record periods in Figure 28. That figure shows that during the overlapping time period the variation of annual average nitrate-N concentration at the project stations is more dynamic than that of the Oakford station. Also, the larger watershed area for the Oakford station generally seems to have lower concentrations than the much smaller watershed areas of the project stations. To evaluate possible relationships between watershed (drainage) area and nitrate-N concentration, annual averages were computed for nitrate-N concentration as well as discharge, runoff, and nitrate-N yield for the three project and Oakford stations for the overlapping time period (WY1994–2008). The mean, standard deviation, and coefficient of variation (CV) of the annual average nitrate-N concentration, discharge, runoff, and nitrate-N yield were plotted against the watershed drainage area. These statistics may provide additional insight into the statistical trend results. Precipitation is the major driving force for runoff. Figure 29 shows annual runoff ranging between just under 3 inches (Monticello (111) in WY2000) to over 23 inches (Friends Creek (102) in WY2008). The annual runoff data exhibited spatial variability within any one year. For some water years, e.g., 1995, 1997, 2001, and 2007, the runoff within the same year varies significantly among gaging stations. Typically, this variability primarily results from the uneven distribution of storms across any given region as well as other differences, such as soil type and land cover. Rainfall variability is the most dominant factor affecting variability in runoff, as all other potentially contributing factors are more similar across the Sangamon River watershed. Despite a significant spatial variability of annual runoff, the long-term averages for all three stations are quite consistent. All three stations have runoff within 3.8 percent of the long-term average runoff based on the three stations (11.83 inches). 12 Long Creek WY1994-2008 Nitrate-N Concentration (mg/L) Friends Creek WY1994-2008 Sangamon River at Monticello WY1994-2008 10 Sangamon River at Oakford WY1975-2006 8 6 4 2 0 1970 1974 1978 1982 1986 1990 1994 Water Year 1998 2002 2006 Figure 28. Annual average nitrate-N concentrations at project and regional stations 58 2010 25 Annual Runoff (inches) 20 Long Creek Friends Creek Sangamon River at Monticello 15 10 5 0 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Water Year Figure 29. Annual runoff at three of the monitoring study stations (revised from Figures 20 and 21) To determine any variation in rainfall and runoff relationships among watersheds, annual runoff is presented as a function of annual precipitation in Figure 30. Annual runoff divided by annual precipitation is defined as the runoff coefficient. The runoff coefficient represents the percentage of precipitation that appears as runoff and is a reflection of the physical and climatic character in the watersheds. Annual runoff values were already computed and presented previously in this report (Figures 20–21). The annual precipitation data (Figure 15) were used to determine representative rainfall for each of the three watersheds. The Decatur precipitation station was used to represent rainfall in the Long Creek (101) watershed; Clinton and Monticello precipitation stations were averaged for the Friends Creek (102) watershed; and Gibson, Rantoul, Urbana, and Clinton precipitation stations were averaged to represent Monticello (111). Figure 30 illustrates that the relationship between annual runoff and annual precipitation has substantial variability between years. The precipitation average for the project period (WY1994–2008) for all three watersheds was 38.23 inches. The long-term averages for each of the three watersheds are all within 1 percent of the regional average. Similar to the runoff, average annual precipitation varied significantly from year to year. The spatial variability exists both for rainfall and runoff. It appears that relationships between runoff and rainfall at the three sites are reasonably similar. This similarity is expected for watersheds near each other, and those with similar physical characteristics such as slope, land use/cover, and soil type. Figure 31 shows a decrease in mean annual nitrate-N concentration with increasing drainage area, which is reasonable due to the likelihood of additional land uses that contribute little or no nitrate-N and increased water residence time that allows potential sinks for nitrate-N, such as denitrification or biological assimilation, to become relatively more important. The relationship between mean annual streamflow (discharge) and drainage area appears to be strong, with the mean flow being nearly proportional to the drainage area (Figure 32). The combination 59 Long Creek Friends Creek Sangamon River at Monticello 25 Annual Runoff (inches) 20 15 10 5 0 25 30 35 40 45 50 Annual Precipitation (inches) 55 60 65 Figure 30. Annual runoff vs. annual precipitation (runoff coefficients) for WY1994–2008 Mean 10 CV 0.01 10 Friends Creek Sangamon River at Monticello 0.1 Sangamon River at Oakford 1 Long Creek Nitrate- N Concentration (mg\L) and CV St. Dev 100 1,000 Drainage Area (mi 2) Figure 31. Long-term mean nitrate-N concentration, standard deviation, and coefficient of variation (CV) versus project and regional station drainage areas 60 10,000 St. Dev 1,000 Sangamon River at Oakford 100 Sangamon River at Monticello Discharge (cfs) and CV CV Long Creek Mean Friends Creek 10,000 10 1 0.1 0.01 10 100 1,000 10,000 2 Drainage Area (mi ) Figure 32. Long-term mean discharge, standard deviation, and coefficient of variation (CV) versus project and regional station drainage areas of increasing runoff and diversity of land uses are common factors that have a dampening effect on nitrate-N concentrations as watershed area increases. This can be seen in Figure 33 where mean annual nitrate-N yield per acre decreased with increased area. In general, the relationships in all figures are fairly consistent and nearly log-linear with minor departures, which are generally explained by natural and anthropogenic differences between the watersheds. Nitrate-N yields are a product of streamflow (runoff) and concentration. The timing of runoff events throughout the year also can affect annual nitrate-N yields. Therefore, the influence of seasonality was investigated by inspecting mean monthly runoff and nitrate-N yields per acre. Figure 34 presents mean monthly runoff during the overlapping record (bars represent WY1994– 2008) and shows that the mean monthly runoff among all four stations is reasonably similar with a more pronounced relative difference among project and Oakford stations during the winter months (December–March). May is when all stations experience the highest runoffs. The Oakford longer-term record (line represents WY1975–2006) has similar monthly runoff from September through April as the overlapping period (WY1994–2008), except it was drier during May and June and wetter during July and August. Figure 35 shows the long-term mean monthly nitrate-N yields per acre for the overlapping record (bars represent WY1994–2008) for all four stations and the Oakford longerterm record (line represents WY1975–2006). May and June are when yields peak at the three project stations during the overlapping record (WY1994–2008), which is the same period for high runoff at these stations. Also, yields between the project and Oakford stations during the overlapping period (WY1994–2008) are markedly different from March through June. Inspection of streamflow records shows that several significant storm events during the 15-year monitoring period occurred predominantly during May and June, which may be skewing the 61 100 Mean St. Dev 0.1 10 Sangamon River at Monticello Friends Creek 1 Sangamon River at Oakford 10 Long Creek Nitrate-N Yield (lbs/acre) and CV CV 100 1,000 10,000 2 Drainage Area (mi ) Figure 33. Long-term mean nitrate-N yield per acre, standard deviation, and coefficient of variation (CV) versus project and regional station drainage areas Long Creek WY1994-2008 3.0 Friends Creek WY1994-2008 Sangamon River at Monticello WY1994-2008 2.5 Sangamon River at Oakford WY1994-2006 Runoff (inches) Sangamon River at Oakford WY1975-2006 2.0 1.5 1.0 0.5 0.0 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG Month Figure 34. Long-term mean monthly runoff for the project and regional stations 62 SEP 6 Long Creek WY1994-2008 Friends Creek WY1994-2008 Sangamon River at Monticello WY1994-2008 Nitrate-N Yield (lbs/acre) 5 Sangamon River at Oakford WY1994-2008 Sangamon River at Oakford WY1975-2006 4 3 2 1 0 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Month Figure 35. Long-term mean monthly nitrate-N yield per acre for the project and regional stations yield peak for project stations due to the shorter data record as compared to the longer record at the Oakford station. The longer record period would dampen the significance of such events. The Oakford nitrate-N yields show different distributions for the two data periods (Figure 35). The longer-term record (WY1975–2006) shows yields were generally higher than during the overlapping period. Also the longer-term yields peaked in March but appear to have a double peak in March and May during the overlapping record (WY1994–2008 - bars). This apparent decrease in yields between the project and Oakford stations could indicate differences in amount, timing, and distribution of precipitation, as well as supply of available nitrogen or fertilizer in the watershed. Trends Summary In summary, the statistical analysis for trends during the WY1994–2008 time period generally shows no apparent trends in discharge and nitrate-N yields in the Sangamon River watershed, as represented by the three project and Oakford stations (Table 14). Also, there was no trend for nitrate-N concentration at the Long Creek, Friends Creek, and Oakford stations during this period. However, there was a statistically significant increasing trend for nitrate-N concentration at Monticello (111), but that increase did not lead to an increased nitrate-N yield. This may be due to differences in the timing of nitrate-N availability and precipitation patterns, although streamflow is more likely the controlling factor as seen in Figure 26 in which nitrate-N concentrations are weighted by streamflow and appear to be steady over the project monitoring 63 period. The Oakford station showed a decreasing discharge trend during the longer-term record (WY1975–2006) in which two of the three tests were statistically significant; however, no trends were found in nitrate-N concentration and yield. The similarity in nitrate-N yield trends between the project and Oakford stations during the overlapping period could imply a similarity in trends for the longer-term period. Therefore, it can be speculated that there has been no trend for nitrate-N yields in the Lake Decatur watershed for a longer period prior to monitoring because there was no trend for the Oakford longer-term period. Although results detected an increasing trend of nitrate-N concentrations for the Monticello (111) station, based on the statistical fit of the annual average data, the rate is a small increase of 0.087 mg/L per year (1.3 mg/L over the project monitoring period). Also, due to the variability in hydrologic/climatic cycles, it is uncertain whether an increase would continue. This type of climatic variability is best illustrated in Figure 36, which shows a) long-term annual precipitation for the last 172 years in Illinois and b) last 115 years at the Decatur precipitation station. Figure 36 presents the 5- and 11-year moving averages for the entire time period. As can be seen from the moving averages, annual precipitation has cycles of wet and dry periods with durations that vary on the order of decades. For example, Figure 36a is a compilation of several long-term precipitation stations from around the State of Illinois and indicates an approximately 15- to 25-year cycle in wetter versus drier periods. In addition, the 11-year moving average in Figure 36b shows four cycles with durations of 20 to 30 years, each peaking (wetter) around 1910, 1930, 1950, and 1980. The period of 1990 to 2008 seems to be relatively level, although the five-year moving average shows a peak in the mid-1990s and then a leveling. Therefore, the 15-year monitoring period (WY1994–2008) could be a reflection of this latest cycle and has the likelihood of shifting in the future. Uncertainty in climate trend predictions makes it complicated to predict future shifts. Therefore, caution should be used when considering this increasing trend for future water treatment and management purposes. Additional investigation of the annual variables and the relationships between stations and drainage area was made to possibly understand the trend results. The relationship between annual precipitation and the amount of precipitation that appears as annual runoff is similar among the three project stations regardless of the difference in their drainage areas or spatial variability in rainfall events across the entire Lake Decatur watershed (Figure 30). This indicates that the drainage areas of the three project stations have similar physical characteristics such as slope, land use/cover, and soil type, which are consistent with the land use information for the watershed (Figure 9) and the no trend in discharge (Table 14). The mean discharge is nearly proportional to drainage area. Mean annual nitrate-N concentrations at the project stations are generally twice that of the Oakford station and slightly decrease with increasing drainage area (Figures 28 and 31). Investigation of seasonal effects on runoff and nitrate-N yield shows only minor variations in runoff among all stations during the overlapping period and the Oakford station during both periods. However, the Oakford station appears to have a decrease in mean monthly nitrate-N yields between the longer-term and overlapping periods from December through April. Because a decreasing trend in annual nitrate-N yields was not detected during the longer-term period (Table 14), the lower mean monthly nitrate-N yield (Figure 35) may not be statistically significant. 64 65 5-year Moving Average 60 11-year Moving Average Precipitation (inches) 55 50 Monitoring Period Annual Total Precipitation a) ILLINOIS 45 40 35 30 25 Monitoring Period 65 b) DECATUR 60 Precipitation (inches) 55 50 45 40 35 30 25 20 1830 1850 1870 1890 1910 1930 1950 1970 1990 Year Figure 36. Long-term annual precipitation, 5- and 11-year moving averages for a) Illinois and b) Decatur precipitation station 65 2010 Summary and Conclusions The monitoring network for the Lake Decatur watershed was established in 1993 to provide streamflow, nitrate-N concentration, and nitrate-N yield data for the Sangamon River upstream of Lake Decatur and associated tributaries. The network was composed of eight sampling stations located throughout the watershed and concluded with three stations in 2008. Specifically, the monitoring period was from May 1993 to September 2008, and the entire dataset is presented in water years (October through September). This report presents the annual precipitation, discharge, runoff, nitrate-N concentration, and nitrate-N yield data for the 15-year monitoring period, as well as a statistical analysis of this data to determine significant trends that may be considered for future water management decisions by the City of Decatur. More detailed data can be found in Appendices A–G. The highest annual precipitation occurred in the first (WY1993) and last (WY2008) water years of the monitoring period with a station average of approximately 54 inches for both years (15 inches above the 30-year mean). Water Year 2000 had the lowest station average annual precipitation of approximately 30 inches. Eight of the 15 years experienced above or extremely above normal precipitation. Consequently, runoff had similar annual variability as precipitation. Annual runoff between river stations had little variability within any year, while there was more variability between the small tributary watershed stations, most likely due to precipitation patterns in terms of watershed proximity and intensity. Relationships between annual precipitation and the amount of precipitation that appears as runoff at Long Creek (101), Friends Creek (102), and Monticello (111) are all similar and within 1 percent of regional values. This similarity is indicative of watersheds with similar physical characteristics. The 100-year streamflow gaging record at the USGS station at Monticello gives an opportunity to understand the character of streamflow in the Lake Decatur watershed during the monitoring period in the context of a longer-term record. Analysis of the data shows that the highest annual streamflow during the monitoring project occurred in WY1993, which was twoand-one-half times the long-term mean. This streamflow was the second highest recorded streamflow at this station since 1908. The WY2008 streamflow was twice the long-term mean and the third highest recorded. WY2000 had the lowest streamflow recorded at Monticello, which was the fourth lowest annual mean streamflow for the 100-year record at Monticello. It appears, along with the annual precipitation record, that the monitoring period covered several record extremes and was a wetter than normal period. In general, annual maximum nitrate-N concentrations decreased as the drainage area increased. Except for WY1994, WY1995, and WY2005, maximum nitrate-N concentrations exceeded the 10 mg/L MCL at all river stations and, except for WY2005, all tributary stations. The 15-year mean annual nitrate-N yield delivered to Lake Decatur from the Upper Sangamon River watershed was 23 lb/acre and varied from 6 lb/acre (WY2000) to 42 lb/acre (WY2008). The annual flow-weighted nitrate-N concentration at Monticello (111), Friends Creek (102), and Long Creek (101) follow similar patterns with some minor fluctuations, and there appears to be no discernable increase or decrease in these concentrations over the 15-year monitoring period. 67 Trends for discharge, nitrate-N concentration, and nitrate-N yield were investigated for the 15-year datasets at Monticello (111), Long Creek (101), and Friends Creek (102). This dataset was augmented by longer data records (WY1975–2006) from a downstream station in the region (Sangamon River station near Oakford) to investigate longer-term trends in the watershed and region. Trend tests indicated a statistically significant increasing trend in annual average nitrate-N concentration only at Monticello (111). Trends of any significance for discharge and nitrate-N yields were not detected at any of the four stations in the Sangamon River watershed during the 15-year monitoring period. Based on the compilation and analyses of the 15-year dataset, the following observations can be made: Eight of the 15 years of the monitoring period had annual precipitation above or extremely above the 1971–1990 30-year mean, making this a relatively wet period. Based on the 100-year streamflow record at the Monticello station, 4 of the top 11 total annual discharges occurred during the project monitoring period (WY1993 - 2nd, WY2008 - 3rd, WY1994 - 10th, and WY1998 - 11th), further confirming that the monitoring period was a wet period. Tributary stations had nitrate-N concentrations consistently higher than river stations, which in turn were higher than Lake Decatur concentrations at the South Water Treatment Plant. As watershed areas increased, nitrate-N concentrations decreased. Nitrate-N yields decreased as drainage area increased, were dispersed throughout the watershed, and varied from year to year. Trends analysis detected a statistically significant increasing trend in annual average nitrate-N concentration at Monticello (111) for the monitoring period. This corresponds to an increase of 1.3 mg/L between 1993 and 2008. This trend did not have a corresponding increasing trend in nitrate-N yields, whereas no trends were detected at the other stations in the Sangamon River watershed. Also, it is unclear whether an increasing trend would continue into the future due to the unknown nature of climate cycles and variability relative to the shorter time interval (15 years) for which nitrate-N data are available. There are no significant trends in discharge and nitrate-N yields for the three stations in the Lake Decatur watershed, implying that there was no change in these parameters over the 15 years. Similarity in trends for nitrate-N yields between the project and Oakford stations during both data periods could imply a similarity in trends during the longer-term period (WY1975–2006). Therefore it can be speculated that there has been no significant change in nitrate-N yields in the Lake Decatur watershed since 1975. 68 Bibliography Amenu, G.G., M. Markus, P. Kumar, and M. Demissie. 2007. 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U.S. Department of Agriculture online database (http://www.nass.usda.gov:81/ipedb/, accessed February 2004). National Agricultural Statistics Service. 2008. Crops County and District Data. U.S. Department of Agriculture online database (http://www.nass.usda.gov/Publications/Ag_Statistics/2008/TOC2008.pdf, accessed September 2008). 71 National Cooperative Soil Survey, U.S.A. 2000. Soil Series Name Search. United States Department of Agriculture (http://ortho.ftw.nrcs.usda.gov/cgi-bin/osd/osdnamequery.cgi, accessed September 2003). Rantz, S.E. 1982a. Measurement and Computation of Streamflow. Vol. 1. Measurement of Stage and Discharge. U.S. Geological Survey Water-Supply Paper 2175, Government Printing Office, Washington, D.C. Rantz, S.E. 1982b. Measurement and Computation of Streamflow. Vol. 2. Computation of Discharge. U.S. Geological Survey Water-Supply Paper 2175, Government Printing Office, Washington, D.C. Salas, J.D. 1993. Analysis and modeling of hydrologic time series. In D.R. Maidment, Chapter 19, Handbook of hydrology. New York: MacGrawHill. Short, M.B. 1999. Baseline Loadings of Nitrogen, Phosphorus, and Sediments from Illinois Watersheds. Illinois Environmental Protection Agency, IEPA/BOW/99-020, Springfield, IL. U.S. Environmental Protection Agency. 1975. Report on Lake Decatur, Macon County, Illinois. Corvallis Environmental Research Laboratory and Environmental Monitoring and Support Laboratory, Las Vegas, Nevada, USEPA Region V, National Eutrophication Survey Working Paper Series No. 302, Chicago, IL. 72 Appendix A. Starting and Ending Dates of Water Years and Project Years A-1 Starting and Ending Dates of Water Years and Project Years Year Water year Starting October 1 Ending September 30 WY 94 WY 95 WY 96 WY 97 WY 98 WY 99 WY 00 WY 01 WY 02 WY 03 WY 04 WY 05 WY 06 WY 07 WY 08 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Year Project year Starting May 1 Ending April 30 PY 1 PY 2 PY 3 PY 4 PY 5 PY 6 PY 7 PY 8 PY 9 PY 10 PY 11 PY 12 PY 13 PY 14 PY 15 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 A-2 Appendix B. NASS Attribute Values and Definitions A-3 Appendix B-1. 1999 NASS Attribute Values and Definitions Categorization code Row crops 1-20 1 2 3 4 5 6 10 11 Land cover Corn Cotton Rice Sorghum Soybeans Sunflowers Peanuts Tobacco Small grains & hay 21-40 21 Barley 22 Durum wheat 23 Spring wheat 24 Winter wheat (AR,IL,MS,NM) 25 Other small grains & hay (oats, millet, rye and winter wheat, alfalfa and other hay) 26 Winter wheat/soybeans double cropped Other crops 41-60 41 42 43 44 50 51 52 53 54 55 56 57 58 59 Other land 61-80 61 62 63 Other 81-99 81 82 83 84 85 86 87 88 90 91 Beets Dry edible beans Potatoes Other crops (canola, flaxseed, safflower & very small acreage crops) State 560 CRP State 561 popcorn State 562 snap beans State 563 green peas State 564 pumpkins State 565 apples State 566 peaches State 567 sweet corn - fresh State 568 sweet corn - processing State 569 other crops Fallow/idle cropland Pasture/range/CRP/non-agricultural (permanent and cropland pasture, waste and farmstead) Woods Clouds Urban Water Roads/railroads Ditches/waterways Buildings/homes/subdivisions Wetlands Grassland Mixed water/crops Mixed Water/Clouds A-4 Appendix B-2. 2007 NASS Attribute Values and Definitions Categorization code Row crops 1-20 1 2 3 4 5 6 10 11 Land cover Corn Cotton Rice Sorghum Soybeans Sunflowers Peanuts Tobacco Grains, hay, and seeds 21-40 21 Barley 22 Durum wheat 23 Spring wheat 24 Winter wheat 25 Other small grains 26 Winter wheat/soybeans double cropped 27 Rye 28 Oats 29 Millet 30 Speltz 31 Canola 32 Flaxseed 33 Safflower 34 Rape seed 35 Mustard 36 Alfalfa 37 Other hays Other crops 41-60 41 42 43 44 45 46 47 48 50 51 52 53 58 Sugar beets Dry beans Potatoes Other crops Sugarcane Sweet potatoes Miscellaneous vegeAppendixs and fruit Watermelon Pickles Chick peas Lentils Peas Clover/wildflowers Open non-crop 61-65 61 62 63 64 65 Fallow/idle cropland Grass/pasture/non-agricultural Woodland Shrubland Barren A-5 Appendix B-2. Concluded Categorization code Land cover Open non-crop 66-80 67 68 69 70 71 72 73 70 Peaches Apples Grapes Christmas trees Other tree nuts & rruit Citrus Other tree Fruit Other non-tree rruit Other 81-99 81 82 83 87 92 Clouds Urban/developed Water Wetlands Aquaculture NLCD-derived non-crop 100-195 111 NLCD - open water 112 NLCD - perennial ice, snow 121 NLCD - developed/open space 122 NLCD - developed/low intensity 123 NLCD - developed/medium intensity 124 NLCD - developed/high intensity 131 NLCD - barren 141 NLCD - deciduous forest (Revised Illinois CDL incorporates #143-Mixed Forest and #63-Woodland) 142 NLCD - evergreen forest 143 NLCD - mixed forest 152 NLCD - shrubland 171 NLCD - grassland herbaceous (Revised Illinois CDL incorporates #152Shrub/Scrub, #181-Pasture/Hay, and #62-Grassland/Pasture/Non-Ag) 181 NLCD - pasture/hay 182 NLCD - cultivated crop 190 NLCD - woody wetlands 195 NLCD - herbaceous wetlands (Revised Illinois CDL incorporates #87Wetlands) A-6 Appendix C. Monthly Precipitation at Selected Stations (May 1993-September 1998) A-7 Appendix C. Monthly Precipitation at Selected Stations (May 1993-September 1998) Gibson City Rantoul Date Oct 1992 Nov 1992 Dec 1992 Jan 1993 Feb 1993 Mar 1993 Apr 1993 May 1993 Jun 1993 Jul 1993 Aug 1993 Sep 1993 Oct 1993 Nov 1993 Dec 1993 Jan 1994 Feb 1994 Mar 1994 Apr 1994 May 1994 Jun 1994 Jul 1994 Aug 1994 Sep 1994 Oct 1994 Nov 1994 Dec 1994 Jan 1995 Feb 1995 Mar 1995 Apr 1995 May 1995 Jun 1995 Jul 1995 Aug 1995 Sep 1995 Oct 1995 Nov 1995 Dec 1995 Jan 1996 Feb 1996 Mar 1996 Apr 1996 May 1996 Jun 1996 Jul 1996 0.84 7.37 2.54 3.54 2.02 4.91 3.66 8.35 6.14 5.44 6.97 4.19 3.55 1.80 1.29 0.54 1.10 5.75 2.68 2.15 3.61 7.21 2.13 1.85 4.95 2.04 3.05 0.27 3.23 4.05 8.31 3.44 1.39 7.05 0.90 4.09 1.82 0.76 1.09 0.24 1.67 3.14 7.29 4.82 4.80 2.79 7.68 2.12 3.63 1.69 2.47 6.32 3.90 5.62 7.31 5.51 8.26 4.27 3.71 1.74 2.04 0.75 1.43 9.85 2.34 1.83 2.72 3.05 2.67 2.95 3.18 2.00 3.52 0.15 3.54 5.12 6.62 1.26 1.20 7.62 0.60 4.38 1.46 1.38 1.63 0.27 2.20 2.72 6.62 3.97 3.39 Urbana Clinton (inches) 2.08 8.03 2.45 4.39 2.30 3.04 5.06 1.83 5.47 8.42 10.02 7.97 4.10 4.24 1.70 1.84 0.98 1.10 9.27 4.01 1.99 1.28 3.65 3.21 3.11 5.15 1.90 2.12 0.45 2.91 3.59 10.11 1.93 1.99 5.36 0.50 3.88 2.03 1.62 2.04 1.41 2.19 3.58 8.26 5.65 3.36 A-8 2.05 7.54 2.71 4.43 2.13 2.58 6.58 1.15 5.48 8.52 5.31 6.82 5.00 4.37 1.57 1.88 1.12 1.59 8.92 3.36 3.56 2.09 2.73 2.58 2.68 5.50 2.42 3.71 0.29 3.82 4.17 10.76 2.04 1.95 3.41 0.52 3.39 1.92 1.75 1.78 0.49 1.88 2.98 7.72 3.94 4.42 Monticello Decatur 1.64 7.24 2.45 4.77 2.21 2.61 6.23 1.95 4.23 6.22 5.06 6.85 3.54 4.17 1.78 2.28 0.93 1.39 8.07 3.46 2.42 1.90 2.49 1.95 1.75 5.12 1.71 3.88 0.38 3.04 3.80 11.37 1.71 1.08 5.89 1.37 3.23 2.20 1.43 1.81 0.78 1.46 4.61 8.12 3.82 2.41 0.95 9.07 3.00 4.27 2.63 2.22 5.14 1.62 4.12 7.03 4.58 7.83 3.16 3.75 1.03 1.27 0.84 1.18 5.88 3.47 3.91 2.48 5.00 2.38 2.23 5.28 1.89 3.02 0.34 3.38 3.94 9.70 2.02 1.64 1.68 1.18 3.57 2.58 1.78 2.38 1.27 2.06 4.97 10.72 2.66 2.63 Appendix C. Continued Gibson City Rantoul Date Aug 1996 Sep 1996 Oct 1996 Nov 1996 Dec 1996 Jan 1997 Feb 1997 Mar 1997 Apr 1997 May 1997 Jun 1997 Jul 1997 Aug 1997 Sep 1997 Oct 1997 Nov 1997 Dec 1997 Jan 1998 Feb 1998 Mar 1998 Apr 1998 May 1998 Jun 1998 Jul 1998 Aug 1998 Sep 1998 Oct 1998 Nov 1998 Dec 1998 Jan 1999 Feb 1999 Mar 1999 Apr 1999 May 1999 Jun 1999 Jul 1999 Aug 1999 Sep 1999 Oct 1999 Nov 1999 Dec 1999 Jan 2000 Feb 2000 Mar 2000 Apr 2000 May 2000 Jun 2000 2.08 2.05 1.49 2.95 1.27 2.20 3.66 2.46 1.54 5.02 3.43 3.82 5.38 2.79 1.06 2.18 1.07 2.84 1.34 5.81 4.27 5.11 9.59 2.00 1.46 0.78 2.83 1.20 1.24 2.54 3.04 1.14 4.16 2.18 5.07 2.61 2.93 1.36 1.97 0.25 2.22 1.08 1.50 1.67 2.52 4.44 3.77 2.76 1.37 1.84 3.65 1.95 2.69 4.87 2.46 1.58 6.23 5.54 1.99 4.15 1.26 1.78 2.40 1.66 2.05 1.78 6.00 3.61 6.73 8.91 4.72 3.43 1.28 2.22 2.12 1.22 2.36 3.16 1.17 4.51 3.67 3.53 2.60 2.90 2.07 2.29 0.63 2.46 1.06 1.72 1.39 1.71 4.18 4.98 Urbana Clinton (inches) 1.42 3.40 1.55 4.14 1.39 2.50 3.51 2.93 1.09 4.69 2.37 2.90 7.02 3.40 1.96 2.56 1.97 2.23 1.80 6.35 4.61 7.82 8.72 4.19 1.94 2.19 2.94 2.43 0.89 4.14 2.48 1.90 4.77 3.52 6.14 3.82 5.34 1.91 1.92 0.81 2.05 1.54 2.40 1.77 2.78 6.18 4.52 A-9 1.85 1.85 1.94 3.18 1.50 2.26 3.34 2.91 1.26 4.68 4.62 3.04 5.92 3.48 1.85 4.97 1.52 2.09 2.23 5.12 3.10 5.73 6.82 2.03 3.11 1.08 3.09 1.82 1.32 2.85 3.11 1.65 5.97 3.16 7.42 2.10 5.51 1.66 2.30 0.42 2.46 1.19 1.80 2.41 4.78 3.60 7.21 Monticello Decatur 4.78 2.03 1.79 3.78 1.30 2.77 3.83 2.53 0.95 3.87 4.63 0.64 3.66 3.47 1.79 3.47 1.78 2.69 2.07 5.69 4.64 8.36 7.91 1.91 2.13 0.60 2.46 2.07 1.07 4.53 3.43 1.48 5.05 2.64 4.67 2.85 5.86 1.46 1.96 0.52 2.20 1.21 1.91 1.51 2.50 4.04 6.01 2.00 2.44 1.56 4.37 1.19 3.79 3.92 2.26 1.68 4.40 2.24 0.90 1.02 2.84 1.71 3.40 0.71 2.32 1.96 5.37 2.98 4.33 7.01 3.06 5.32 0.73 2.93 1.56 0.88 2.01 2.31 0.18 5.96 3.01 7.63 2.90 3.39 1.78 2.09 0.54 2.17 1.21 1.84 1.27 1.08 2.84 4.69 Appendix C. Continued Gibson City Rantoul Date Jul 2000 Aug 2000 Sep 2000 Oct 2000 Nov 2000 Dec 2000 Jan 2001 Feb 2001 Mar 2001 Apr 2001 May 2001 Jun 2001 Jul 2001 Aug 2001 Sep 2001 Oct 2001 Nov 2001 Dec 2001 Jan 2002 Feb 2002 Mar 2002 Apr 2002 May 2002 Jun 2002 Jul 2002 Aug 2002 Sep 2002 Oct 2002 Nov 2002 Dec 2002 Jan 2003 Feb 2003 Mar 2003 Apr 2003 May 2003 Jun 2003 Jul 2003 Aug 2003 Sep 2003 Oct 2003 Nov 2003 Dec 2003 Jan 2004 Feb 2004 Mar 2004 Apr 2004 May 2004 2.41 1.51 3.87 2.04 3.00 2.00 1.05 3.89 0.74 3.74 3.54 4.29 2.59 4.61 2.52 6.85 1.77 1.82 2.43 2.35 2.74 3.44 4.23 2.83 4.44 7.04 1.15 1.87 0.96 1.50 0.42 1.07 1.38 2.98 4.30 2.79 6.70 5.66 3.24 1.56 4.05 1.71 0.99 0.51 6.16 1.26 8.21 0.94 2.43 3.02 2.15 3.55 2.38 1.10 3.99 0.57 2.04 2.81 3.32 2.88 4.99 2.26 7.02 2.00 1.84 2.43 3.68 2.57 4.11 2.89 3.58 2.12 5.29 1.86 2.24 0.94 2.10 0.53 1.00 0.81 3.58 4.22 3.04 8.73 7.03 4.67 1.59 4.43 2.62 1.57 0.36 5.43 1.31 5.14 Urbana Clinton (inches) 2.45 3.59 4.24 2.76 3.84 1.73 1.32 3.84 0.85 1.09 3.83 2.83 3.64 4.79 3.55 6.45 1.91 2.21 2.81 2.95 3.10 4.21 6.29 2.78 2.73 7.27 1.77 3.17 0.86 1.54 0.79 1.60 2.08 2.20 3.59 3.04 6.98 6.27 4.07 1.31 4.94 3.11 2.18 0.56 7.74 1.88 4.38 A-10 3.00 2.32 2.42 2.50 3.88 1.89 2.30 3.78 1.46 1.89 3.05 3.19 3.44 3.50 2.49 6.53 2.21 2.05 2.67 2.92 2.63 6.07 5.98 4.72 3.37 5.30 1.60 2.71 0.96 1.50 0.75 1.52 2.44 2.41 4.73 2.30 7.07 2.87 4.11 1.56 6.20 1.92 1.69 0.55 4.48 1.52 7.29 Monticello Decatur 2.47 3.54 3.67 2.17 3.42 1.81 0.93 2.99 0.80 0.31 2.23 2.48 4.80 2.36 1.08 5.53 1.91 1.55 2.21 2.33 2.86 4.36 7.56 3.26 2.42 5.71 1.54 2.83 0.93 1.75 0.96 1.57 1.58 2.26 5.32 3.81 5.12 3.62 5.96 0.86 - 3.98 4.07 3.74 1.99 3.24 1.56 1.82 3.38 1.08 4.11 3.36 6.34 2.25 5.84 3.06 6.59 2.34 2.36 2.84 2.27 2.95 6.70 10.78 3.45 2.29 2.40 1.96 3.25 0.86 2.23 0.67 1.25 2.35 2.36 5.23 3.06 4.66 4.13 3.54 1.75 3.76 2.49 2.58 0.48 4.62 1.91 5.04 Appendix C. Continued Gibson City Rantoul Date Jun 2004 Jul 2004 Aug 2004 Sep 2004 Oct 2004 Nov 2004 Dec 2004 Jan 2005 Feb 2005 Mar 2005 Apr 2005 May 2005 Jun 2005 Jul 2005 Aug 2005 Sep 2005 Oct 2005 Nov 2005 Dec 2005 Jan 2006 Feb 2006 Mar 2006 Apr 2006 May 2006 Jun 2006 Jul 2006 Aug 2006 Sep 2006 Oct 2006 Nov 2006 Dec 2006 Jan 2007 Feb 2007 Mar 2007 Apr 2007 May 2007 Jun 2007 Jul 2007 Aug 2007 Sep 2007 Oct 2007 Nov 2007 Dec 2007 Jan 2008 Feb 2008 3.84 3.77 4.74 1.00 3.59 4.43 2.13 6.51 1.34 1.31 3.74 1.63 1.70 3.91 2.90 5.03 0.92 3.85 0.83 1.99 0.68 4.34 4.65 2.36 3.63 5.56 2.70 5.33 3.61 2.40 4.29 2.81 1.09 3.92 4.55 0.84 3.25 5.74 3.63 1.01 4.27 2.89 4.80 4.40 4.29 6.30 4.47 6.94 0.15 4.42 3.85 2.49 6.80 2.64 1.59 3.19 1.99 2.77 8.14 2.45 4.21 1.10 4.25 1.02 1.13 1.00 2.96 5.95 3.03 1.70 8.38 4.36 2.44 3.97 2.67 3.33 2.82 1.90 3.17 3.29 1.50 5.35 3.32 1.51 2.64 3.48 4.39 2.60 3.40 5.32 Urbana Clinton (inches) 3.77 5.73 3.59 2.19 3.71 5.16 2.02 6.20 2.00 1.73 3.98 0.97 2.42 4.30 2.26 5.66 1.28 3.72 1.86 1.78 0.52 3.46 4.41 3.06 1.65 7.85 3.00 1.34 3.78 2.35 4.68 3.03 2.07 2.23 2.43 1.63 5.68 3.44 1.48 2.06 3.29 3.65 2.95 2.31 5.96 A-11 4.56 4.99 6.14 0.23 6.12 4.62 1.90 6.57 2.19 1.84 1.61 1.56 0.88 4.60 4.83 3.30 1.53 4.65 1.21 1.98 0.45 4.13 3.86 2.60 4.74 6.81 4.59 3.44 3.35 2.96 5.72 3.06 2.44 3.92 4.04 1.42 5.63 2.07 1.90 0.69 4.76 2.74 3.87 4.13 2.84 Monticello 0.74 4.77 3.07 1.96 2.97 2.45 1.51 6.50 2.37 1.87 1.45 3.58 2.60 2.66 2.94 5.41 Decatur 4.00 3.58 7.59 0.14 5.25 5.27 1.80 7.35 1.66 1.61 2.22 1.45 4.09 3.22 2.28 5.99 3.31 3.68 1.23 2.05 0.71 3.52 5.68 3.87 1.57 4.73 4.03 2.13 3.94 3.32 3.75 3.16 2.26 1.40 3.59 2.00 5.03 1.96 0.64 0.82 3.77 2.90 2.78 2.26 5.57 Appendix C. Concluded Gibson City Rantoul 1.83 2.72 *5.70 *5.42 *5.02 *1.10 *9.85 2.37 3.75 5.38 6.32 7.76 1.06 9.99 Date Mar 2008 Apr 2008 May 2008 June 2008 July 2008 Aug 2008 Sept 2008 Urbana Clinton (inches) 2.84 3.01 6.07 6.40 7.89 0.79 8.15 Note: *Data derived from surrounding area. A-12 2.63 1.52 3.44 6.19 4.10 0.18 9.29 Monticello Decatur 2.50 3.40 5.19 9.35 8.14 0.65 10.13 4.02 2.32 6.33 8.03 8.90 2.21 10.86 Appendix D. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) by Station A-13 Appendix D-1. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Long Creek (Station 101) Day Oct A-14 Jan Feb Mar Apr Long Creek (101), Water Year 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 - - - - - 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 70 40 35 30 25 20 20 40 80 70 50 43 57 29 21 16 15 11 10 9 8 7 6 5 4 6 6 6 7 5 4 3 3 2 2 2 2 7 Total Max Min Avg Runoff - - - - 740 70 20 24 1.0 492 80 2 16 0.4 - Nov - Dec - May Jun Jul Aug Sept 29 34 39 15 9 6 5 4 3 3 2 2 8 31 1 0 0 0 0 6 4 6 6 4 3 2 2 1 1 1 3 5 2 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 2 6 1 0 0 2 1 0 0 0 0 0 0 0 3 72 21 8 4 3 2 1 1 0 1 1 64 193 94 57 37 24 17 14 40 376 184 177 240 337 173 117 93 228 39 0 7 0.2 24 6 0 1 0.0 2353 376 0 78 1.9 Appendix D-1. Continued Day A-15 Dec Jan Feb Mar Apr May Jun Long Creek (101), Water Year 1994 1 74 24 62 2 54 21 238 3 42 21 184 4 37 20 212 5 28 19 163 6 20 15 114 7 6 13 86 8 1 12 59 9 0 11 9 10 0 10 0 11 0 10 0 12 0 10 0 13 46 14 0 14 60 289 0 15 50 283 1 16 62 148 11 17 428 288 13 18 194 243 0 19 131 150 0 20 150 111 0 21 324 87 0 22 152 66 5 23 123 56 8 24 114 48 0 25 90 72 0 26 64 276 0 27 53 175 0 28 51 120 0 29 42 92 0 30 34 69 0 31 30 0 0 0 0 0 0 0 0 0 0 10 8 8 8 11 10 9 12 12 13 15 15 17 20 48 146 122 148 663 105 62 38 48 26 18 15 14 13 14 14 17 12 11 11 11 10 11 13 14 17 20 31 32 23 27 23 18 19 20 13 12 12 14 53 112 99 152 80 0 0 0 0 0 0 0 0 9 3 0 0 0 0 4 1 0 0 0 0 8 11 10 10 10 15 15 14 15 14 17 18 147 606 1595 438 230 244 191 143 123 108 89 84 76 67 62 57 52 106 107 143 232 202 132 111 93 76 70 296 176 116 86 68 60 52 50 47 39 35 33 31 29 27 24 22 21 28 27 22 20 19 18 17 15 15 16 16 14 14 13 20 49 37 29 28 64 39 29 22 19 18 16 14 13 12 15 82 36 24 19 16 14 12 1499 663 0 48 1.2 514 48 10 18 0.4 579 152 0 19 0.5 5027 1595 10 168 4.1 2046 296 17 66 1.7 729 82 12 24 0.6 Total Max Min Avg Runoff Oct 2459 428 0 79 2.0 Nov 2772 289 10 92 2.3 1164 238 0 38 0.9 Jul Aug Sept 11 10 10 9 8 6 5 5 4 3 3 2 2 2 2 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 90 11 0 3 0.1 0 0 0 0 0.0 1 1 0 0 0.0 Appendix D-1. Continued Day Oct Nov A-16 Long Creek (101), Water Year 1995 1 0 2 2 0 0 3 0 0 4 0 3 5 0 7 6 0 5 7 0 2 8 0 1 9 0 14 10 0 10 11 0 5 12 0 3 13 0 2 14 0 2 15 0 2 16 0 2 17 0 2 18 0 1 19 0 1 20 0 1 21 0 13 22 0 12 23 0 7 24 0 5 25 0 4 26 0 3 27 0 5 28 0 7 29 0 6 30 0 4 31 1 Total Max Min Avg Runoff 3 1 0 0 0.0 131 14 0 4 0.1 Dec Jan Feb Mar Apr May Jun 3 3 3 3 2 2 10 12 11 11 9 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 9 11 11 11 11 13 15 15 15 16 16 16 32 31 25 21 21 18 16 15 15 15 15 14 12 14 13 10 11 11 9 11 9 9 9 8 7 6 6 6 7 6 7 6 5 5 5 5 5 4 4 5 5 5 13 129 102 78 66 52 40 32 26 23 20 18 17 18 15 13 12 11 10 10 12 13 11 10 10 9 9 9 8 7 7 8 8 8 7 7 8 7 6 6 6 11 68 63 45 43 30 25 23 19 16 16 0 0 0 12 12 11 10 10 9 9 12 415 208 173 122 134 121 88 116 823 616 549 191 139 110 92 83 83 84 85 85 85 86 83 68 55 44 34 29 27 22 16 14 13 11 10 8 7 5 4 3 3 3 3 3 2 21 51 12 7 6 9 5 3 75 12 0 2 0.1 336 32 0 11 0.3 259 15 5 9 0.2 789 129 4 25 0.6 473 68 0 16 0.4 4654 823 9 150 3.8 496 68 2 17 0.4 Jul Aug Sept 2 2 2 2 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 2 0 0 0.0 0 0 0 0 0.0 0 0 0 0 0.0 Appendix D-1. Continued Day Oct Nov A-17 Long Creek (101), Water Year 1996 1 0 1 2 0 1 3 0 2 4 0 2 5 0 2 6 0 2 7 0 2 8 0 2 9 0 2 10 0 2 11 0 5 12 0 6 13 0 5 14 0 5 15 0 4 16 0 4 17 0 4 18 0 4 19 0 4 20 0 4 21 0 5 22 0 4 23 0 5 24 0 5 25 0 5 26 0 5 27 0 5 28 0 6 29 0 6 30 0 6 31 1 Total Max Min Avg Runoff 1 1 0 0 0.0 107 6 1 4 0.1 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 6 6 7 7 8 9 10 10 10 10 10 10 10 10 11 11 11 12 17 17 16 16 14 13 12 11 10 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 24 65 86 28 14 10 8 13 8 4 3 3 2 3 4 4 4 4 4 4 4 4 6 5 3 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 7 55 24 13 11 8 4 30 62 26 38 38 8 5 4 4 4 3 3 3 2 2 2 2 2 2 2 7 4 3 3 3 3 52 112 61 39 22 12 10 8 7 5 3 3 3 3 2 2 2 1 1 41 13 5 42 93 61 44 26 15 18 537 180 144 108 104 882 270 159 140 1268 781 710 414 202 163 145 129 113 102 86 74 66 58 50 46 40 38 676 1008 315 163 125 107 111 433 157 117 93 106 80 66 83 256 152 162 101 77 60 52 46 43 40 35 32 31 28 27 21 18 17 16 15 14 14 13 12 11 9 7 7 7 6 4 3 3 3 2 3 2 2 2 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 324 17 6 10 0.3 397 86 2 13 0.3 134 55 0 5 0.1 352 62 2 11 0.3 1370 537 1 46 1.1 8687 1268 38 280 7.1 2487 433 14 83 2.0 118 14 0 4 0.1 1 1 0 0 0.0 0 0 0 0 0.0 Appendix D-1. Continued Day Oct Nov Dec A-18 Long Creek (101), Water Year 1997 1 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 3 8 0 2 9 0 1 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 1 0 24 1 0 25 0 1 26 0 1 27 0 1 28 0 1 29 0 1 30 1 2 31 1 Total Max Min Avg Runoff 4 1 0 0 0.0 19 3 0 1 0.0 Jan Feb Mar Apr May Jun 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 33 63 30 12 3 3 3 3 3 3 4 9 19 165 85 40 23 15 9 8 7 6 5 5 4 4 4 4 4 5 5 5 5 5 20 237 485 171 119 111 98 74 64 54 45 41 47 65 56 42 45 167 97 65 57 52 47 44 41 33 26 23 26 21 19 19 18 14 13 11 10 10 11 12 12 7 5 5 5 6 9 8 6 7 7 7 7 7 7 7 7 7 6 5 5 5 5 5 5 5 5 75 92 58 40 28 25 20 15 13 14 14 13 11 9 8 8 8 8 6 5 5 5 6 7 7 7 7 7 14 15 17 18 15 13 13 20 43 75 51 38 34 37 33 22 20 17 15 13 11 11 10 8 7 6 6 5 6 5 4 27 2 1 1 0.0 162 63 0 5 0.1 1355 485 4 48 1.1 1644 167 13 53 1.3 217 12 5 7 0.2 544 92 5 18 0.4 588 75 4 20 0.5 Jul Aug Sept 4 4 3 2 2 2 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21 4 0 1 0.0 1 0 0 0 0.0 5 4 0 0 0.0 Appendix D-1. Continued Day Oct Nov Dec A-19 Long Creek (101), Water Year 1998 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 1 29 0 1 30 0 14 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 19 14 0 1 0.0 Jan Feb Mar Apr May Jun Jul Aug Sept 3 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 4 3 2 2 2 2 2 1 1 1 5 24 21 156 156 95 65 50 38 35 33 31 28 25 22 20 15 10 8 6 5 5 5 8 12 11 10 10 9 6 5 6 6 5 5 4 4 8 16 13 11 10 12 74 154 109 89 71 60 53 43 36 35 39 34 30 28 26 23 19 17 17 67 161 114 85 66 63 87 76 64 229 489 201 554 456 236 157 128 111 93 78 727 316 161 125 108 102 176 579 192 138 124 311 144 112 92 74 68 66 59 56 45 39 37 34 32 30 27 24 23 22 16 14 30 57 201 238 335 443 193 133 120 304 187 135 112 93 78 65 57 51 42 37 34 31 29 29 158 224 127 93 70 59 51 44 39 34 31 25 23 28 24 19 18 186 122 112 380 232 146 454 689 317 162 445 166 133 233 947 231 143 113 92 73 104 304 121 90 69 58 47 41 125 122 61 46 36 30 25 20 17 16 14 12 11 8 6 7 8 8 8 6 4 3 2 61 34 12 7 5 4 27 22 12 8 6 6 5 3 2 2 38 20 6 80 30 12 7 5 3 3 2 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 4 4 4 3 3 3 3 3 3 3 3 3 3 26 4 0 1 0.0 904 156 1 29 0.7 926 154 4 33 0.8 5003 727 17 161 4.1 2829 579 14 94 2.3 3808 443 29 123 3.1 5985 947 18 199 4.9 1116 125 2 36 0.9 333 80 1 11 0.3 42 4 0 1 0.0 Appendix D-1. Continued Day Oct Nov Dec A-20 Long Creek (101), Water Year 1999 1 3 56 2 3 54 3 3 56 4 5 68 5 6 51 6 12 41 7 10 35 8 11 33 9 11 32 10 12 72 11 13 73 12 13 49 13 14 40 14 16 37 15 18 34 16 21 30 17 24 27 18 31 23 19 36 21 20 38 21 21 41 20 22 43 19 23 44 18 24 46 18 25 46 20 26 47 23 27 52 24 28 55 24 29 60 24 30 67 26 31 63 Total Max Min Avg Runoff 864 67 3 28 0.7 1066 73 18 36 0.9 Jan Feb Mar Apr May Jun 28 27 27 27 26 26 26 25 25 25 25 25 25 25 26 26 25 25 27 28 29 30 30 29 29 28 28 27 27 26 26 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 20 44 555 916 518 288 208 201 166 133 117 122 163 157 130 107 87 74 319 407 217 151 159 212 124 105 96 86 77 70 64 57 52 49 48 44 40 36 38 41 36 42 79 59 52 47 37 38 43 37 38 51 61 55 47 42 40 33 28 28 28 26 24 24 22 21 21 21 20 19 19 19 19 94 86 49 95 65 53 130 67 56 42 37 35 271 575 524 245 163 130 233 140 107 83 70 65 70 120 86 64 59 55 50 47 59 66 68 56 48 45 42 45 155 105 79 66 58 53 47 44 42 42 38 36 34 32 30 28 27 26 27 43 420 141 216 528 136 97 77 65 55 54 49 147 119 71 55 47 41 37 34 46 39 32 37 35 29 28 26 26 22 826 30 25 27 0.7 3766 916 20 121 3.1 3209 407 36 115 2.6 1137 79 19 37 0.9 3790 575 19 126 3.1 1607 155 26 52 1.3 2752 528 22 92 2.2 Jul Aug Sept 20 20 17 16 15 14 15 13 12 11 11 10 9 8 7 7 8 8 7 6 5 5 5 5 4 4 20 13 9 7 7 6 4 4 4 3 3 4 5 5 5 4 3 403 42 15 10 8 7 7 6 6 6 9 20 16 10 7 6 6 5 4 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 2 317 20 4 10 0.3 643 403 3 21 0.5 70 4 2 2 0.1 Appendix D-1. Continued Day A-21 Dec Jan Feb Mar Apr May Jun Jul Long Creek (101), Water Year 2000 1 2 5 5 2 2 6 5 3 2 6 5 4 3 6 5 5 3 6 10 6 2 6 9 7 2 6 7 8 10 6 7 9 8 7 6 10 7 6 7 11 6 5 6 12 5 5 6 13 5 5 6 14 5 5 7 15 4 5 7 16 4 5 7 17 5 5 7 18 5 7 7 19 5 7 7 20 5 6 7 21 5 6 6 22 5 6 6 23 5 6 6 24 5 7 6 25 5 6 6 26 5 6 6 27 5 6 7 28 5 6 6 29 5 6 7 30 5 5 7 31 5 6 6 6 9 11 9 8 8 8 7 7 7 7 7 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 7 7 6 6 6 6 6 6 6 6 9 10 9 8 8 8 7 7 46 53 35 26 20 17 15 15 14 15 14 13 13 12 11 11 11 10 10 10 10 10 10 11 12 12 12 12 11 10 11 22 28 21 17 16 15 14 14 13 12 10 9 9 9 9 9 8 12 8 8 7 7 6 6 6 6 6 6 7 8 8 7 7 7 6 11 14 13 12 11 10 9 9 9 9 9 8 8 9 10 13 16 14 16 32 21 14 12 10 10 9 8 8 8 8 8 7 6 95 405 141 95 68 51 42 33 30 30 24 19 18 16 14 14 13 13 13 14 12 11 10 9 15 184 81 48 58 57 63 56 38 30 24 215 11 6 7 0.2 404 53 6 14 0.3 397 28 9 13 0.3 249 14 6 8 0.2 1093 405 6 35 0.9 1041 184 9 35 0.8 Total Max Min Avg Runoff Oct 140 10 2 5 0.1 Nov 173 7 5 6 0.1 206 10 5 7 0.2 Aug Sept 19 17 15 13 325 167 86 53 39 31 37 84 41 29 21 16 13 12 11 10 9 8 7 6 5 4 4 3 3 3 2 2 1 1 1 8 9 7 4 3 2 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11 12 11 7 4 4 1093 325 2 35 0.9 49 9 0 2 0.0 50 12 0 2 0.0 Appendix D-1. Continued Day Oct Nov Dec A-22 Long Creek (101), Water Year 2001 1 3 9 2 3 9 3 3 9 4 4 9 5 113 9 6 138 11 7 80 30 8 54 27 9 41 87 10 33 197 11 26 135 12 20 106 13 17 111 14 17 106 15 17 84 16 15 75 17 14 61 18 13 50 19 12 46 20 12 41 21 11 32 22 10 29 23 10 28 24 9 26 25 9 31 26 9 63 27 9 66 28 9 52 29 9 46 30 9 37 31 9 32 Total Max Min Avg Runoff 737 138 3 24 0.6 1652 197 9 53 1.3 Jan Feb Mar Apr May Jun 29 25 24 22 15 16 15 10 10 22 65 58 46 41 37 33 29 28 28 27 27 26 26 25 25 25 25 25 25 25 24 23 21 18 17 16 15 14 13 12 13 13 13 29 91 74 48 35 31 24 22 18 15 16 17 14 14 15 158 593 186 114 89 67 50 45 39 41 55 191 198 114 86 69 107 153 121 90 68 60 51 41 39 35 241 1064 955 228 168 130 108 95 83 73 61 51 44 41 37 34 33 31 31 27 27 69 102 80 65 56 49 43 39 35 31 30 28 27 27 27 25 24 22 21 19 68 100 49 37 32 55 885 205 140 109 91 72 59 50 46 44 39 34 32 29 27 27 26 24 22 21 21 21 19 18 18 18 18 18 17 15 17 15 14 14 15 15 14 17 16 17 17 16 15 15 15 14 15 13 13 12 12 13 14 13 35 93 1633 345 156 114 89 70 56 46 40 36 31 27 26 23 21 22 21 19 17 16 15 14 13 12 11 855 65 10 28 0.7 1703 593 12 55 1.4 4595 1064 35 164 3.7 1508 108 25 49 1.2 2409 885 19 80 2.0 493 21 12 16 0.4 3040 1633 11 101 2.5 Jul Aug Sept 10 8 7 8 7 6 5 4 4 3 3 2 2 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 3 1 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 18 16 2 1 0 0 0 0 1 0 5 2 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 2 3 84 10 0 3 0.1 39 18 0 2 0.0 23 5 0 1 0.0 Appendix D-1. Continued Day Oct A-23 Dec Jan Feb Mar Apr May Jun Long Creek (101), Water Year 2002 1 3 24 101 2 3 24 63 3 3 20 47 4 3 18 38 5 5 17 31 6 4 17 27 7 5 17 24 8 5 17 21 9 6 15 18 10 6 15 16 11 3 14 14 12 17 12 15 13 33 11 34 14 68 11 74 15 30 11 92 16 77 9 79 17 51 7 270 18 30 7 209 19 22 8 132 20 16 6 90 21 13 6 69 22 12 7 62 23 18 6 62 24 49 10 50 25 99 10 41 26 60 6 37 27 40 6 33 28 31 6 30 29 26 14 25 30 23 117 23 31 21 21 20 19 18 18 18 17 16 15 14 13 12 12 12 12 11 10 9 9 9 10 10 9 9 9 8 7 7 7 9 22 480 463 194 150 116 86 70 58 48 45 44 40 41 32 29 30 26 22 20 143 496 229 147 115 96 80 69 59 51 44 86 161 95 75 87 88 72 221 145 95 81 73 66 59 58 56 50 41 41 38 33 33 32 94 98 91 182 190 121 89 72 61 45 38 34 32 31 71 99 66 56 49 43 40 37 31 27 25 25 42 509 311 165 307 502 167 530 701 215 163 125 109 84 66 54 140 995 340 831 241 354 805 1025 391 218 235 230 200 153 132 115 104 91 81 72 63 59 56 52 48 45 42 40 37 34 39 36 32 29 27 26 73 214 152 121 85 65 52 44 38 34 31 29 28 25 24 23 22 19 17 16 Total Max Min Avg Runoff 850 480 7 27 0.7 2999 496 20 107 2.4 2693 221 32 87 2.2 4493 701 25 150 3.6 7513 1025 45 242 6.1 1453 214 16 48 1.2 783 99 3 25 0.6 Nov 468 117 6 16 0.4 1850 270 14 60 1.5 Jul Aug Sept 14 13 11 11 10 8 7 6 5 4 3 3 2 2 1 1 1 1 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 109 14 0 4 0.1 4 0 0 0 0.0 1 0 0 0 0.0 Appendix D-1. Continued Day Oct Nov Dec A-24 Long Creek (101), Water Year 2003 1 0 2 6 2 0 2 6 3 0 2 6 4 0 2 6 5 0 3 6 6 0 4 6 7 0 3 5 8 0 3 4 9 0 3 4 10 0 3 5 11 0 4 4 12 0 4 4 13 0 4 4 14 0 4 4 15 0 4 4 16 0 5 4 17 0 5 5 18 0 5 10 19 2 6 4 20 0 5 1 21 0 4 1 22 0 5 1 23 0 5 1 24 0 5 1 25 1 5 1 26 2 5 1 27 1 5 1 28 0 5 1 29 2 6 1 30 2 6 1 31 2 1 Total Max Min Avg Runoff 13 2 0 0 0.0 122 6 2 4 0.1 108 10 1 3 0.1 Jan Feb Mar Apr May Jun 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 6 3 2 2 1 1 1 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 14 11 8 6 5 4 6 9 3 3 2 1 1 1 1 2 3 2 3 4 3 4 6 9 8 7 7 7 7 5 2 3 1 2 1 6 13 2 5 4 3 3 3 9 5 4 4 5 5 6 11 5 12 37 36 44 38 50 47 234 111 76 59 46 38 33 29 24 34 31 23 19 15 13 12 10 9 13 10 9 8 7 8 8 7 9 11 12 12 13 23 357 106 145 72 52 41 36 42 38 30 24 20 16 12 14 12 10 9 8 21 1 1 1 0.0 45 6 1 2 0.0 99 14 1 3 0.1 146 13 1 5 0.1 1132 234 5 37 0.9 1161 357 7 39 0.9 Jul Aug Sept 8 7 7 6 4 4 3 3 6 52 28 14 9 7 5 4 3 5 3 2 5 3 2 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 98 24 4 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 195 52 0 6 0.2 5 2 0 0 0.0 130 98 0 4 0.1 Appendix D-1. Continued Day Oct Nov Dec A-25 Long Creek (101), Water Year 2004 1 0 8 8 2 0 9 8 3 0 9 10 4 0 9 10 5 0 11 16 6 0 12 18 7 0 11 16 8 0 11 14 9 0 10 12 10 0 10 12 11 0 10 11 12 0 11 11 13 0 11 11 14 2 11 11 15 2 11 11 16 1 11 11 17 1 14 10 18 1 61 9 19 1 47 9 20 1 43 9 21 4 26 9 22 4 13 11 23 4 10 108 24 4 10 100 25 4 10 64 26 5 9 48 27 6 9 41 28 6 9 41 29 6 8 132 30 7 8 114 31 8 76 Total Max Min Avg Runoff 68 8 0 2 0.1 443 61 8 15 0.4 970 132 8 31 0.8 Jan Feb Mar Apr May Jun 62 57 51 560 435 177 114 86 69 58 54 53 48 46 44 40 49 97 72 54 45 42 40 39 38 37 35 34 30 22 17 13 10 8 6 5 5 4 3 3 2 2 2 2 2 4 6 11 30 61 80 64 46 43 44 42 40 38 35 35 36 34 26 125 369 175 119 90 73 60 55 46 41 40 38 39 38 36 32 32 30 24 24 25 34 217 238 152 182 198 168 128 104 84 68 59 53 49 43 38 35 34 32 30 25 21 21 19 16 16 16 21 27 38 35 38 36 33 30 28 24 28 27 20 18 21 18 16 13 13 14 26 26 40 228 179 119 92 81 144 96 71 60 52 44 77 73 64 54 44 45 83 57 43 37 34 33 32 30 26 21 22 45 37 27 19 661 271 98 66 51 41 38 35 29 21 16 13 10 10 8 7 2605 560 17 84 2.1 647 80 2 22 0.5 2797 369 24 90 2.3 1198 128 16 40 1.0 1886 228 13 61 1.5 1835 661 7 61 1.5 Jul Aug Sept 6 5 5 5 5 41 72 21 10 87 36 22 12 9 6 5 4 4 3 2 2 2 1 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 3 46 14 116 289 57 30 13 8 6 4 4 3 2 2 2 2 1 1 1 1 1 1 1 2 2 2 2 3 3 3 3 3 3 3 3 3 371 87 0 12 0.3 558 289 0 18 0.5 89 13 1 3 0.1 Appendix D-1. Continued Day Oct Nov Dec A-26 Long Creek (101), Water Year 2005 1 2 120 542 2 2 279 229 3 2 161 157 4 2 179 128 5 2 140 108 6 2 110 107 7 2 86 865 8 3 68 418 9 3 59 206 10 3 54 155 11 2 51 127 12 4 48 111 13 7 42 93 8 38 75 14 9 37 68 15 9 36 65 16 9 35 59 17 42 33 57 18 104 36 51 19 69 36 49 20 50 33 45 21 40 32 39 22 39 32 39 23 53 218 39 24 43 396 39 25 42 188 39 26 107 415 39 27 94 493 37 28 85 242 33 29 91 322 29 30 85 31 31 Total Max Min Avg Runoff 1017 107 2 33 0.8 4022 493 32 134 3.3 4079 865 29 132 3.3 Jan Feb Mar Apr May Jun Jul Aug Sept 25 22 123 276 995 735 250 156 127 139 239 557 1298 40 38 38 38 48 64 98 173 140 101 81 77 137 40 38 37 37 36 35 36 34 31 31 32 31 26 36 36 34 33 33 32 31 28 25 24 23 29 41 12 10 10 10 9 9 10 9 10 10 9 19 22 9 10 12 14 13 12 12 9 8 8 16 15 10 5 5 4 4 4 4 4 3 3 2 2 3 3 0 0 0 5 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 265 154 112 91 79 68 63 61 59 54 51 53 63 56 49 48 45 41 300 153 127 96 76 66 64 66 63 60 57 52 46 43 43 22 19 18 19 20 19 18 16 20 40 46 67 70 61 56 46 42 40 37 33 30 27 27 26 24 24 27 29 22 20 20 17 15 14 14 17 14 11 10 9 12 29 21 15 13 11 9 9 8 8 8 8 9 226 82 60 47 38 32 24 18 15 13 11 9 8 7 6 5 5 3 9 6 3 7 5 3 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 1 3 5 10 29 9 6 6 5 6357 1298 22 205 5.2 2386 300 38 85 1.9 810 41 14 27 0.7 373 29 8 12 0.3 757 226 5 25 0.6 87 9 0 3 0.1 10 5 0 0 0.0 77 29 0 3 0.1 1084 70 16 35 0.9 Appendix D-1. Continued Day Oct Nov Dec A-27 Jan Feb Mar Apr May Jun Jul 23 17 14 13 11 10 11 11 11 11 11 10 10 10 10 10 10 10 10 10 10 10 9 12 13 14 13 21 34 33 32 30 34 35 33 26 21 19 18 15 13 16 15 18 31 32 34 43 45 39 36 37 36 35 35 34 29 23 23 79 71 57 48 41 38 33 31 25 20 18 16 16 16 15 14 14 13 20 23 18 18 18 18 17 16 13 12 10 10 12 12 12 10 9 9 10 10 15 42 97 87 263 186 126 89 77 65 60 54 47 47 41 42 59 61 59 53 58 49 46 58 54 59 111 75 64 759 332 154 110 90 76 66 61 60 55 54 73 63 101 69 62 56 49 43 41 38 36 34 33 35 41 48 46 41 38 35 34 32 31 31 41 37 34 31 29 30 27 31 25 20 17 15 14 15 36 32 22 16 14 13 218 582 148 98 74 62 54 46 39 36 33 32 27 19 17 15 14 13 24 62 35 24 15 12 10 9 9 8 7 6 5 432 34 9 14 0.4 1013 79 13 33 0.8 564 48 10 20 0.5 1852 263 9 60 1.5 2915 759 33 97 2.4 1094 218 13 35 0.9 1536 582 5 51 1.2 Long Creek (101), Water Year 2006 1 4 37 2 3 30 3 4 19 4 4 16 5 3 13 6 2 15 7 2 12 8 2 10 9 2 9 10 2 8 11 2 7 12 4 7 13 1 7 14 1 7 15 3 13 16 1 25 17 1 15 18 1 12 19 2 11 20 5 9 21 11 8 22 9 8 23 6 7 24 5 8 25 6 7 26 13 6 27 7 7 28 6 43 29 7 41 30 8 29 31 15 Total Max Min Avg Runoff 144 15 1 5 0.1 446 43 6 15 0.4 Aug Sept 5 4 4 13 26 6 4 3 3 2 63 181 336 65 41 27 14 9 7 6 5 5 4 4 3 3 3 3 3 2 2 2 1 1 1 1 1 1 3 3 3 3 2 2 2 2 2 2 8 3 2 2 1 1 1 1 1 3 20 6 4 3 2 2 2 1 1 2 2 2 1 1 2 3 3 3 3 3 3 4 4 4 4 5 0 1 1 1 1 1 1 2 858 336 2 28 0.7 87 20 1 3 0.1 67 5 0 2 0.1 Appendix D-1. Continued Day Oct Nov Dec A-28 Long Creek (101), Water Year 2007 1 2 2 188 2 2 3 113 3 2 1 71 4 2 1 61 5 2 1 54 6 3 1 35 7 3 1 27 8 3 2 26 9 3 2 26 10 4 2 20 11 4 3 19 12 5 3 79 13 6 3 74 14 7 3 58 15 7 5 45 16 7 14 31 17 4 12 23 18 2 6 20 19 1 3 17 20 1 2 15 21 1 2 146 22 1 1 230 23 1 1 157 24 2 1 101 25 2 1 82 26 2 1 69 27 1 1 56 28 4 1 48 29 4 1 40 30 3 19 33 31 3 121 Total Max Min Avg Runoff 96 7 1 3 0.1 98 19 1 3 0.1 2085 230 15 67 1.7 Jan Feb Mar Apr May Jun 146 88 71 72 144 101 78 73 63 50 47 43 251 201 585 173 98 82 68 57 51 44 36 29 21 19 34 30 27 24 23 23 22 21 20 19 19 18 17 16 15 15 14 13 12 12 11 11 10 10 9 7 23 57 85 701 214 109 93 284 263 106 74 63 54 38 30 31 38 33 28 26 24 20 14 12 10 13 11 10 10 13 22 20 17 13 9 8 7 31 28 15 26 19 13 10 8 6 5 5 20 41 22 24 42 37 27 21 15 11 9 8 8 6 8 10 10 7 5 5 4 4 3 3 4 3 2 2 2 2 2 2 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 7 2 1 0 1 2 1 2834 585 19 91 2.3 1596 701 7 57 1.3 1332 284 7 43 1.1 470 42 5 16 0.4 50 4 0 2 0.0 24 7 0 1 0.0 Jul Aug Sept 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 0 0 0.0 0 0 0 0 0.0 1 1 0 0 0.0 Appendix D-1. Concluded Day Oct Nov Dec A-29 Long Creek (101), Water Year 2008 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 1 13 0 2 14 0 2 15 0 2 16 0 2 17 0 2 18 0 3 19 0 3 20 0 3 21 0 8 22 0 4 23 0 1 24 0 1 25 0 1 26 0 1 27 0 1 28 0 0 29 0 0 30 0 0 31 0 Total Max Min Avg Runoff 1 0 0 0 0.0 39 8 0 1 0.0 Jan Feb Mar Apr May 0 1 1 1 1 0 0 0 2 4 6 15 40 33 27 26 24 20 15 13 25 60 59 42 36 33 31 26 26 24 23 19 18 17 17 17 17 14 199 183 118 99 77 65 59 49 41 38 36 33 33 33 33 33 33 33 33 32 30 22 18 18 18 18 18 45 967 1088 174 97 72 64 59 53 49 45 42 39 198 126 72 61 51 42 39 37 36 40 38 35 49 76 64 145 134 79 70 76 64 55 51 52 58 58 60 58 46 49 121 301 143 97 73 62 57 52 44 44 78 65 60 93 231 104 79 67 60 54 47 41 39 86 216 101 74 64 59 53 45 41 39 36 34 33 32 31 34 50 36 34 32 29 29 29 26 20 17 17 17 25 27 19 95 93 64 54 52 96 68 56 43 40 36 34 32 30 27 29 25 19 18 24 72 614 60 0 20 0.5 1469 199 14 47 1.2 3670 1088 18 127 3.0 2484 301 44 80 2.0 1882 231 29 63 1.5 1232 96 17 40 1.0 Jun Jul Aug Sept 55 53 1446 1221 209 127 1771 465 151 112 88 75 66 63 61 59 54 49 69 75 67 65 63 60 61 59 57 57 47 41 38 38 106 72 56 43 209 137 186 84 73 683 199 105 78 64 55 45 40 37 36 137 65 47 39 35 32 81 47 37 33 26 19 14 12 13 22 13 9 9 8 7 6 5 4 4 2 2 1 0 0 1 5 6 5 4 3 2 2 2 2 1 1 1 2 105 318 74 49 37 34 24 16 111 118 1295 1923 192 115 83 71 66 64 63 61 59 56 51 46 42 40 37 6843 1771 41 228 5.6 2937 683 32 95 2.4 208 26 0 7 0.2 5151 1923 1 172 4.2 Appendix D-2. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Friends Creek (Station 102) Day Oct Nov Dec A-30 Friends Creek (102), Water Year 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Total Max Min Avg Runoff - - - Jan Feb Mar Apr May Jun Jul Aug Sept - - - - 465 408 358 312 318 281 202 143 120 111 106 102 97 87 84 75 70 69 66 62 60 57 61 60 53 50 48 48 43 42 51 51 52 52 92 366 265 176 138 118 103 90 82 76 71 65 60 58 57 55 56 59 54 50 44 41 35 32 33 32 49 256 699 560 351 236 161 129 155 126 103 116 198 126 361 229 182 268 411 250 175 125 109 103 173 586 440 264 164 119 94 98 149 90 65 52 37 32 27 22 18 17 17 39 105 75 60 40 28 23 20 191 206 119 87 76 70 48 30 24 20 17 14 13 14 204 283 144 103 83 63 52 50 50 75 75 100 500 250 150 100 75 75 75 75 100 140 150 200 500 400 260 257 - - - - 4111 465 42 133 1.4 2512 366 32 84 0.8 7366 699 94 238 2.5 1816 206 14 59 0.6 4616 500 13 154 1.5 Appendix D-2. Continued Day A-31 Dec Jan Feb Mar Apr May Jun Friends Creek (102), Water Year 1994 1 200 93 148 2 144 86 432 3 117 84 564 4 106 83 509 5 86 80 444 6 73 68 340 7 68 62 258 8 64 60 201 9 322 57 168 10 538 56 154 11 374 55 124 12 277 55 115 13 192 57 110 14 146 264 111 15 123 499 144 16 245 357 134 17 655 438 121 18 665 594 116 19 423 438 112 20 381 341 107 21 568 265 103 22 444 189 96 23 346 156 86 24 293 137 79 25 233 134 78 26 189 368 68 27 157 409 64 28 143 311 58 29 128 223 58 30 112 168 46 31 104 55 57 57 55 53 50 46 39 42 37 26 18 18 18 16 22 14 15 16 16 17 15 15 15 15 50 150 200 400 192 102 59 64 50 32 25 26 23 23 17 21 16 15 14 14 13 16 22 31 50 63 103 131 104 78 52 32 17 23 22 20 17 16 34 255 315 396 463 341 239 170 138 123 112 103 87 73 75 72 66 62 57 53 51 43 37 42 48 47 41 37 35 34 35 37 37 38 38 52 71 173 943 3544 2194 1050 682 543 417 353 293 204 159 133 115 106 95 89 531 554 655 511 603 412 324 260 206 165 471 583 386 301 218 187 153 135 127 115 106 101 93 85 79 69 65 62 62 64 63 59 56 54 52 48 42 37 32 30 35 35 36 62 61 54 56 142 135 111 101 89 79 71 58 35 32 27 27 26 24 22 21 19 17 1842 400 14 59 0.6 1096 131 13 39 0.4 3631 463 16 117 1.2 13720 3544 34 457 4.6 5718 603 52 184 1.9 1564 142 17 52 0.5 Total Max Min Avg Runoff Oct 7919 665 64 255 2.7 Nov 6187 594 55 206 2.1 5201 564 46 168 1.7 Jul Aug Sept 16 17 20 17 15 15 16 24 23 18 15 14 14 13 12 10 8 6 5 5 5 5 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 313 24 2 10 0.1 29 2 1 1 0.0 18 1 1 1 0.0 Appendix D-2. Continued Day Oct Nov Dec A-32 Jan Feb Mar Apr May Jun 7 5 4 4 3 3 23 92 71 58 41 24 20 17 14 13 52 60 41 27 25 24 21 19 17 16 15 15 13 12 11 12 7 10 10 10 10 10 10 10 10 10 10 22 405 510 363 244 159 215 386 248 135 96 78 70 61 59 58 46 38 37 41 42 35 31 22 24 24 24 24 24 24 24 24 24 24 21 17 17 16 10 10 9 9 8 6 6 6 6 5 4 4 5 5 5 321 744 637 401 281 212 158 127 113 107 98 90 83 79 74 65 61 55 51 51 52 55 56 54 52 51 49 45 40 38 42 45 42 42 40 37 42 53 54 54 54 54 134 271 171 150 126 110 100 88 77 73 74 70 70 70 69 65 62 60 57 56 56 350 517 457 367 312 627 404 394 2964 2235 1869 1046 738 530 405 793 1224 691 511 657 555 387 311 242 202 177 157 136 130 124 105 99 201 207 137 120 99 89 82 76 72 68 66 62 60 67 204 116 101 77 65 67 65 766 92 3 25 0.0 3353 510 7 108 0.2 551 42 6 20 0.1 4104 744 4 132 0.2 2296 271 37 77 0.7 18838 2964 56 608 4.4 3474 242 60 116 2.2 Friends Creek (102), Water Year 1995 1 1 2 2 1 2 3 1 2 4 1 2 5 1 2 6 1 9 7 1 15 8 1 13 9 1 10 10 1 10 11 1 12 12 1 8 13 1 5 14 1 3 15 1 3 16 1 4 17 1 3 18 1 3 19 1 2 20 2 2 21 2 2 22 2 7 23 2 4 24 2 3 25 3 3 26 3 2 27 3 2 28 3 14 29 3 16 30 3 11 31 2 Total Max Min Avg Runoff 49 3 1 2 0.0 176 16 2 6 0.0 Jul Aug Sept 54 41 35 35 38 37 32 22 21 20 19 19 18 17 14 12 12 11 10 6 6 6 6 5 5 5 5 4 3 2 2 2 1 1 1 1 1 6 29 34 52 18 12 11 5 3 2 3 4 4 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 523 54 2 17 0.1 202 52 1 7 0.0 15 1 0 0 0.0 Appendix D-2. Continued Day Oct Nov Dec A-33 Friends Creek (102), Water Year 1996 1 0 0 2 0 0 3 0 0 4 0 1 5 0 1 6 0 1 7 0 1 8 0 1 9 0 4 10 0 4 11 0 4 12 0 4 13 0 4 14 0 4 15 0 4 16 0 4 17 0 4 18 0 4 19 0 4 20 0 4 21 0 4 22 0 3 23 0 2 24 0 2 25 0 2 26 0 2 27 0 2 28 0 1 29 0 1 30 0 1 31 0 Total Max Min Avg Runoff 12 0 0 0 0.0 69 4 0 2 0.0 Jan Feb Mar Apr May Jun 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 30 138 125 64 11 8 7 7 7 7 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5 5 5 4 4 4 4 3 2 2 6 13 11 11 11 28 28 24 26 21 23 23 23 23 14 13 12 12 11 11 10 9 9 8 8 8 8 10 9 10 11 12 12 19 124 110 79 63 46 34 30 27 24 21 20 20 20 17 17 17 15 14 16 65 46 80 156 117 103 85 63 54 233 296 165 119 103 241 250 158 130 374 1113 1120 1551 839 535 392 318 249 199 165 140 122 111 100 89 84 284 368 1411 1078 549 370 261 229 1006 694 432 305 237 192 160 147 680 488 328 238 179 147 127 114 106 97 85 76 70 66 64 57 34 23 19 16 14 77 5 1 2 0.0 504 138 5 16 0.2 161 13 2 6 0.1 457 28 8 15 0.2 2009 296 14 67 0.7 12988 1551 84 419 4.4 6431 1006 14 214 2.2 Jul Aug Sept 13 11 10 7 5 4 5 8 13 18 15 14 14 13 13 12 11 8 7 5 13 38 30 21 17 18 15 11 9 7 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 391 38 4 13 0.1 2 0 0 0 0.0 0 0 0 0 0.0 Appendix D-2. Continued Day A-34 Dec Jan Feb Mar Apr May Jun Jul Aug Sept Friends Creek (102), Water Year 1997 1 0 0 5 2 0 0 5 3 0 0 6 4 0 0 6 5 0 3 5 6 0 5 6 7 0 5 6 8 0 6 6 9 0 11 5 10 0 13 6 11 0 13 6 12 0 13 6 13 0 13 5 14 0 14 5 15 0 15 5 16 0 16 5 17 0 16 5 18 0 17 4 19 0 17 5 20 0 18 5 21 0 18 5 22 0 18 5 23 0 18 7 24 0 16 25 25 0 9 20 26 0 6 11 27 0 5 5 28 0 5 5 29 0 5 5 30 0 5 5 31 0 5 5 5 6 7 9 10 9 12 12 12 12 12 12 12 12 12 12 12 12 12 15 67 136 157 116 76 52 36 24 22 22 29 65 119 182 208 101 65 44 27 23 20 17 18 14 14 18 23 30 48 137 669 708 465 310 208 280 1207 845 545 417 331 241 165 138 118 109 207 557 369 239 181 353 284 177 150 135 121 117 112 102 86 78 80 73 68 69 71 65 60 56 55 54 55 57 60 51 38 34 33 36 47 45 31 28 29 29 29 32 32 29 28 26 25 23 20 20 23 24 30 31 20 365 319 176 128 106 100 83 71 67 67 62 59 53 41 39 41 46 55 45 34 32 32 56 331 266 136 104 87 83 79 80 88 87 79 76 170 157 325 201 146 135 505 451 270 182 140 118 110 101 92 82 73 67 69 66 62 58 56 58 180 152 112 88 71 62 52 43 34 27 23 21 16 15 14 12 10 7 6 4 3 6 6 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 34 9 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 117 83 44 20 13 11 9 6 4 2 1 1 7 13 13 13 13 12 11 11 10 9 930 157 5 30 0.3 5895 1207 14 211 2.0 5820 557 60 188 2.0 1081 60 20 36 0.4 3135 365 20 101 1.1 4182 505 56 139 1.4 969 180 0 31 0.3 45 34 0 1 0.0 426 117 0 14 0.1 Total Max Min Avg Runoff Oct 0 0 0 0 0.0 Nov 299 18 0 10 0.1 203 25 4 7 0.1 Appendix D-2. Continued Day A-35 Dec Jan Feb Mar Apr May Jun Jul Friends Creek (102), Water Year 1998 1 8 14 243 2 8 15 198 3 7 17 166 4 6 19 140 5 6 20 114 6 6 21 97 7 6 20 80 8 5 21 68 9 4 21 71 10 3 21 75 11 3 21 80 12 3 21 89 13 4 21 90 14 5 21 90 15 7 21 84 16 8 21 78 17 7 19 73 18 5 19 68 19 6 18 65 20 6 18 61 21 6 18 57 22 6 18 57 23 6 18 58 24 7 17 58 25 8 16 60 26 7 15 61 27 9 16 61 28 12 16 62 29 13 94 72 30 13 245 82 31 12 69 64 63 62 60 59 106 271 415 478 341 217 162 132 115 113 105 98 86 77 73 72 69 66 64 60 59 58 61 72 77 75 74 73 66 64 64 63 60 58 56 55 58 150 122 97 87 84 118 234 203 181 161 144 128 118 111 108 108 106 102 97 92 87 80 75 74 88 267 206 160 135 128 133 135 132 284 720 624 615 909 705 476 351 267 204 167 500 613 361 252 287 202 163 173 174 157 145 140 131 120 111 106 104 146 163 127 114 104 99 94 89 85 80 77 75 73 70 65 64 253 562 580 787 1115 595 406 539 821 647 396 305 234 215 199 170 152 136 125 118 113 108 104 295 716 368 237 198 174 151 135 125 115 108 102 94 89 84 77 72 129 335 252 596 467 362 1312 897 610 375 492 430 295 302 776 493 303 202 155 133 119 118 3829 478 58 124 1.3 2952 234 55 105 1.0 9041 909 74 292 3.0 3790 287 64 126 1.3 10825 1115 104 349 3.6 9895 1312 72 330 3.3 Total Max Min Avg Runoff Oct 212 13 3 7 0.1 Nov 863 245 14 29 0.3 2729 243 57 88 0.9 Aug Sept 116 106 96 88 79 72 111 144 100 85 79 73 68 63 58 55 51 43 36 30 27 24 22 21 19 18 17 16 15 14 14 15 16 18 21 22 22 23 22 16 12 10 7 6 5 4 4 4 6 9 10 8 7 5 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1757 144 14 57 0.6 275 23 0 9 0.1 0 0 0 0 0.0 Appendix D-2. Continued Day Oct Nov Dec A-36 Friends Creek (102), Water Year 1999 1 0 0 2 0 0 3 0 1 4 0 1 5 0 1 6 0 1 7 1 1 8 1 1 9 0 1 10 0 2 11 0 2 12 0 2 13 0 3 14 0 4 15 0 5 16 0 5 17 0 5 18 0 5 19 0 5 20 0 5 21 0 4 22 0 4 23 0 4 24 0 4 25 0 3 26 0 3 27 0 3 28 0 3 29 0 3 30 0 3 31 0 Total Max Min Avg Runoff 4 1 0 0 0.0 86 5 0 3 0.0 Jan Feb Mar Apr May Jun Jul Aug Sept 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 3 3 3 3 3 3 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 5 5 19 205 403 258 166 164 150 115 103 95 123 132 131 117 98 93 338 511 376 271 200 160 131 114 108 103 97 90 83 74 67 62 61 61 59 57 55 53 51 48 80 101 90 92 92 88 92 83 70 67 80 93 102 111 114 100 80 74 73 68 63 60 56 53 52 52 51 44 43 48 48 54 103 98 256 175 140 299 269 191 146 125 117 250 773 806 550 382 291 314 308 210 158 138 128 121 233 211 153 132 122 115 109 107 103 110 107 99 89 77 81 222 278 201 159 125 105 99 94 87 79 72 67 64 62 60 58 56 54 52 63 102 127 171 470 246 162 129 113 104 137 316 491 754 492 286 206 164 141 126 116 108 102 273 826 383 236 187 150 129 118 111 103 93 80 69 62 55 50 47 41 37 34 32 29 25 21 20 17 14 13 11 8 6 5 4 6 6 5 5 4 3 1 1 1 1 1 1 1 1 1 1 1 141 94 49 31 19 12 8 6 4 4 4 6 18 11 7 5 4 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 99 4 2 3 0.0 1747 403 3 56 0.6 3825 511 53 137 1.3 2323 114 43 75 0.8 7096 806 48 237 2.4 3245 278 52 105 1.1 7309 826 63 244 2.4 1133 118 4 37 0.4 436 141 1 14 0.1 0 0 0 0 0.0 Appendix D-2. Continued Day A-37 Dec Jan Feb Mar Apr May Jun Jul Friends Creek (102), Water Year 2000 1 0 8 12 2 0 8 13 3 0 7 14 4 0 7 14 5 0 7 16 6 0 8 18 7 1 7 21 8 2 7 21 9 2 7 18 10 2 7 17 11 7 7 16 12 8 7 18 13 8 7 19 14 8 7 18 15 8 6 18 16 8 6 19 17 11 6 21 18 13 5 21 19 12 5 21 20 12 5 18 21 11 5 16 22 10 5 19 23 10 6 17 24 9 7 17 25 9 7 17 26 8 6 17 27 8 6 17 28 8 6 17 29 8 5 16 30 8 4 16 31 8 15 16 15 15 20 20 19 18 19 23 24 24 22 20 18 18 18 17 17 19 23 26 27 27 27 28 28 28 28 28 28 28 28 28 28 28 29 29 29 29 29 29 30 34 41 39 35 34 32 95 205 134 112 97 80 68 59 54 53 47 45 46 42 38 38 38 36 34 34 34 33 30 29 29 30 30 29 26 23 31 71 117 106 94 87 79 68 67 65 56 49 46 45 47 48 46 43 43 43 42 37 36 37 39 39 40 41 41 49 86 88 85 117 124 114 118 148 131 118 110 103 94 102 100 98 96 95 94 92 91 90 89 88 88 262 221 153 127 113 105 99 93 89 85 82 79 77 76 157 365 253 175 142 123 112 102 93 150 159 129 116 107 98 90 90 386 357 328 207 156 129 113 110 601 608 329 332 409 337 275 207 172 150 685 28 15 22 0.2 1578 205 28 54 0.5 1534 117 23 49 0.5 2153 148 36 72 0.7 3875 365 76 125 1.3 6573 608 90 219 2.2 Total Max Min Avg Runoff Oct 200 13 0 6 0.1 Nov 189 8 4 6 0.1 532 21 12 17 0.2 Aug Sept 135 123 113 103 337 331 200 153 134 120 466 267 171 144 123 108 94 83 76 71 63 51 42 36 32 27 23 19 15 14 13 13 10 8 6 12 13 9 6 5 4 2 2 1 1 1 1 2 4 3 3 3 5 6 5 4 5 5 3 2 1 1 1 1 0 0 0 0 0 0 0 23 6 4 4 2 1 1 1 1 1 1 1 1 1 1 7 11 8 6 5 4 3686 466 13 119 1.2 148 13 1 5 0.0 92 23 0 3 0.0 Appendix D-2. Continued Day A-38 Dec Jan Feb Mar Apr May Jun Jul Aug Sept Friends Creek (102), Water Year 2001 1 4 16 30 2 4 15 29 3 3 9 26 4 3 9 28 5 39 9 27 6 68 13 27 7 48 37 30 8 34 37 30 9 25 64 23 10 22 125 25 11 19 100 50 12 16 84 104 13 14 90 104 14 12 91 86 15 47 81 73 16 46 75 72 17 36 64 46 18 29 52 36 19 26 48 35 20 27 43 35 21 27 32 34 22 25 30 34 23 23 29 33 24 23 29 33 25 25 36 32 26 26 46 32 27 21 41 31 28 17 37 29 29 17 36 28 30 17 32 27 31 15 26 62 62 62 62 62 62 62 62 62 62 62 62 62 62 111 113 90 80 73 58 90 80 41 40 49 35 32 28 198 819 690 369 256 211 155 142 126 130 147 408 449 262 200 166 248 384 283 210 169 156 141 125 122 114 403 2011 838 620 443 333 264 223 193 168 152 139 131 121 115 111 106 105 93 94 136 191 176 159 146 135 125 118 110 102 97 92 90 91 86 84 81 76 75 71 71 76 75 73 70 71 74 74 64 61 69 64 56 51 56 62 59 51 50 50 43 44 45 41 37 39 30 31 28 26 29 29 28 26 24 24 31 30 24 25 28 29 27 33 40 37 39 35 29 29 26 28 31 25 22 20 21 25 27 28 45 96 254 291 181 136 116 103 92 83 76 71 65 56 51 46 40 57 56 46 36 31 27 24 22 20 18 15 12 13 16 13 10 8 7 7 7 5 3 3 2 2 1 1 5 3 2 1 1 1 1 1 0 0 1 2 3 1 1 3 4 2 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 3498 819 28 113 1.2 9289 2011 114 332 3.1 4287 333 84 138 1.4 1828 81 37 61 0.6 883 40 20 28 0.3 2218 291 18 74 0.7 146 16 0 5 0.0 21 4 0 1 0.0 15 1 0 0 0.0 Total Max Min Avg Runoff Oct 756 68 3 24 0.3 Nov 1409 125 9 47 0.5 1255 104 23 40 0.4 Appendix D-2. Continued Day A-39 Dec Jan Feb Mar Apr May Jun Jul Aug Sept Friends Creek (102), Water Year 2002 1 0 52 217 2 0 46 140 3 0 38 109 4 0 34 93 5 1 32 81 6 1 30 74 7 1 29 69 8 1 27 64 9 1 23 53 10 1 23 48 11 2 22 43 12 3 19 43 13 36 18 55 14 97 19 82 15 76 18 162 16 119 17 160 17 112 15 357 18 81 14 388 19 68 16 274 20 52 14 192 21 40 15 148 22 33 15 133 23 33 14 128 24 89 17 112 25 243 18 99 26 144 13 94 27 97 13 90 28 79 12 84 29 70 17 74 30 61 182 70 31 54 71 62 49 49 52 49 49 41 42 42 38 31 31 33 33 27 23 23 22 22 22 25 22 23 23 19 19 19 20 21 41 616 965 576 392 295 220 178 153 135 127 120 113 107 100 95 95 88 79 73 227 895 744 432 318 264 217 178 150 126 109 177 393 272 201 205 216 187 282 316 235 186 159 144 132 114 110 104 98 97 89 82 86 85 88 83 92 214 314 256 193 161 145 118 103 98 94 93 118 181 145 133 123 110 106 103 95 90 87 88 86 203 325 219 178 204 164 422 1066 750 443 319 264 209 172 150 169 389 418 825 644 545 1716 1644 993 629 482 517 488 373 298 249 210 185 163 147 130 120 118 476 298 219 171 144 125 111 188 255 183 148 128 118 403 1451 834 671 431 315 251 204 174 149 130 119 112 105 101 95 89 81 76 72 69 65 60 54 47 39 34 30 27 23 19 16 13 11 9 7 6 5 4 3 3 2 2 2 1 1 4 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 149 412 194 114 78 54 33 19 11 7 5 3 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1587 616 19 51 0.5 7464 965 73 267 2.5 5321 393 82 172 1.8 6252 1066 86 208 2.1 13560 1716 118 437 4.5 7435 1451 72 248 2.5 559 69 0 18 0.2 1068 412 0 34 0.4 24 7 0 1 0.0 Total Max Min Avg Runoff Oct 1593 243 0 51 0.5 Nov 822 182 12 27 0.3 3806 388 43 123 1.3 Appendix D-2. Continued Day Oct Nov Dec A-40 Jan Feb Mar Apr May Jun Jul 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 6 15 21 15 11 8 8 8 8 8 8 8 7 28 24 18 16 15 15 11 9 8 10 10 9 8 7 7 7 7 7 7 7 7 7 7 6 6 5 5 4 4 5 7 10 11 13 14 15 14 12 10 9 8 6 6 5 5 4 4 4 3 3 4 5 7 9 11 14 17 17 16 15 15 14 13 13 13 12 12 13 14 15 17 26 54 86 76 67 57 48 47 117 151 126 101 87 78 71 66 66 57 42 40 45 41 36 36 62 67 90 124 102 88 79 73 63 57 56 56 55 44 38 40 44 42 33 33 41 38 30 28 29 27 29 29 25 30 232 189 131 105 157 292 359 221 156 132 156 149 126 112 103 107 95 88 82 77 74 68 63 60 70 63 124 110 85 78 69 58 53 56 52 45 41 66 629 726 622 355 243 181 148 127 110 99 90 82 75 69 66 58 52 45 39 199 28 2 6 0.1 274 24 4 9 0.1 262 17 3 9 0.1 1611 151 12 52 0.5 1598 124 27 53 0.5 3706 359 25 120 1.2 4529 726 39 151 1.5 Friends Creek (102), Water Year 2003 1 0 0 2 0 0 3 0 0 4 0 0 5 0 1 6 0 1 7 0 1 8 0 1 9 0 1 10 0 2 11 0 3 12 0 3 13 0 4 14 0 4 15 0 4 16 0 3 17 0 3 18 0 3 19 1 3 20 0 3 21 0 3 22 0 3 23 0 3 24 0 3 25 0 4 26 0 3 27 0 3 28 0 3 29 1 3 30 1 3 31 0 Total Max Min Avg Runoff 9 1 0 0 0.0 72 4 0 2 0.0 Aug Sept 34 32 29 26 22 18 16 13 14 207 174 104 75 54 40 29 22 19 17 13 19 25 17 11 8 6 5 5 4 3 2 2 2 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 6 241 125 66 28 13 8 5 3 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 0 1 1 1063 207 2 34 0.4 17 6 0 1 0.0 507 241 0 17 0.2 Appendix D-2. Continued Day A-41 Dec Jan Feb Mar Apr May Jun Jul Aug Sept Friends Creek (102), Water Year 2004 1 1 2 91 2 1 2 81 3 1 2 78 4 1 2 77 5 1 2 76 6 1 2 70 7 1 3 68 8 1 3 69 9 1 3 69 10 1 3 71 11 1 3 65 12 1 4 56 13 1 3 54 14 2 3 55 15 1 3 54 16 2 3 54 17 2 3 43 18 2 188 40 19 1 665 37 20 1 363 36 21 1 244 35 22 1 184 41 23 1 162 227 24 1 332 272 25 2 271 181 26 2 200 138 27 2 163 119 28 2 136 112 29 2 117 120 30 2 110 133 31 2 119 107 105 100 260 404 260 188 157 131 111 107 100 88 85 82 76 74 72 70 67 66 64 62 61 59 58 56 54 49 45 40 38 36 32 29 28 28 27 27 26 25 25 24 23 22 22 21 20 20 55 170 148 112 89 68 62 57 51 44 44 50 47 33 59 397 333 228 166 138 113 105 92 83 81 75 76 75 72 64 64 57 50 57 60 63 686 1291 827 655 594 592 459 354 285 231 187 166 150 135 115 106 100 92 89 84 82 84 82 77 74 69 75 68 66 59 65 65 58 57 56 52 53 50 50 46 49 47 43 39 39 39 40 42 45 220 480 314 232 199 530 463 295 229 177 147 533 614 347 250 188 165 264 236 167 131 113 105 98 89 83 78 84 417 451 267 187 395 1216 980 531 333 253 201 164 135 118 106 102 91 83 76 71 67 63 59 57 48 40 35 31 33 153 151 106 83 106 106 78 63 47 35 27 22 24 19 13 11 8 8 7 6 6 7 6 4 3 3 3 3 2 2 2 5 2 2 1 1 1 1 2 2 2 4 4 3 3 3 213 1200 593 445 495 521 306 207 152 118 95 79 69 55 41 32 26 22 20 17 15 14 14 12 11 10 8 8 7 7 7 7 6 6 6 6 6 3256 404 40 105 1.1 1374 170 20 47 0.5 7285 1291 33 235 2.4 3641 459 52 121 1.2 6226 614 39 201 2.1 7361 1216 71 245 2.5 1520 153 6 49 0.5 3838 1200 1 124 1.3 1081 207 6 36 0.4 Total Max Min Avg Runoff Oct 43 2 1 1 0.0 Nov 3182 665 2 106 1.1 2743 272 35 88 0.9 Appendix D-2. Continued Day A-42 Dec Jan Feb Mar Apr May Friends Creek (102), Water Year 2005 1 5 347 816 2 5 781 570 3 5 593 395 4 5 521 311 5 4 441 271 6 4 338 256 7 4 275 875 8 4 218 1127 9 5 182 620 10 4 165 412 11 4 151 320 12 10 133 275 13 14 119 225 14 17 110 180 15 21 104 162 16 22 102 150 17 16 99 135 18 81 94 129 19 267 104 115 20 200 123 109 21 148 113 107 22 120 107 94 23 109 105 90 24 97 180 86 25 84 479 82 26 84 394 78 27 312 522 75 28 297 734 72 29 297 528 71 30 366 570 71 31 330 72 67 67 178 530 1050 1447 842 474 353 338 483 1054 1547 1414 787 453 339 257 195 164 149 131 102 114 113 156 121 104 98 90 81 76 71 70 68 85 143 217 428 365 269 203 185 263 777 520 337 257 193 161 147 145 139 128 123 115 108 103 103 96 86 81 82 80 74 79 72 64 64 68 66 56 48 45 45 49 49 49 43 38 43 75 125 200 219 159 138 117 108 109 97 94 86 86 85 82 79 76 73 73 71 74 72 63 58 56 57 58 58 57 55 64 65 57 57 55 49 41 40 40 37 33 32 30 29 30 32 32 33 37 36 34 33 35 33 30 28 28 36 43 41 36 34 31 28 27 27 26 25 25 23 23 22 25 24 23 21 19 19 19 18 18 18 18 75 86 72 58 45 37 31 27 22 16 14 13 11 9 8 7 6 13299 1547 67 429 4.5 5800 777 68 207 1.9 2627 219 38 85 0.9 986 43 23 32 0.3 802 86 6 27 0.3 Total Max Min Avg Runoff Oct 2940 366 4 95 1.0 Nov 8731 781 94 291 2.9 8350 1127 71 269 2.8 1978 97 40 66 0.7 Jun Jul Aug Sept 6 5 5 4 3 2 2 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 7 10 4 3 1 1 0 0 0 0 0 0 0 0 1 11 13 14 14 15 14 14 14 14 13 14 17 16 16 16 15 19 18 16 16 14 15 21 21 17 14 16 13 48 6 0 2 0.0 35 10 0 1 0.0 433 21 0 14 0.1 Appendix D-2. Continued Day A-43 Dec Jan Feb Mar Apr May Jun Jul Aug Sept Friends Creek (102), Water Year 2006 1 18 63 78 2 24 60 60 3 73 53 45 4 28 43 25 5 16 31 13 6 5 14 13 7 23 10 14 8 49 11 15 9 46 8 16 10 44 6 16 11 45 5 18 12 42 5 19 13 27 5 22 14 25 5 25 15 42 9 24 16 48 49 20 17 47 58 17 18 31 42 17 19 33 36 17 20 48 29 99 21 54 23 102 22 53 21 78 23 53 16 59 24 37 14 41 25 43 13 27 26 51 11 19 27 52 11 33 28 46 87 56 29 46 141 70 30 47 102 69 31 53 49 45 48 50 34 24 19 16 15 13 10 8 8 8 41 75 59 35 31 30 29 29 29 29 28 26 20 16 16 32 74 75 70 65 57 47 38 28 23 21 19 31 42 39 29 29 28 28 42 55 57 57 53 45 33 24 23 23 22 24 25 25 23 19 17 17 17 18 32 124 160 378 386 271 166 132 112 95 92 89 87 77 76 79 75 69 66 66 64 58 73 117 109 117 133 125 201 662 477 328 204 152 130 107 99 98 113 279 183 361 252 162 128 113 106 99 91 84 78 75 74 145 163 152 141 127 111 96 90 87 86 164 253 202 157 128 110 101 104 126 124 105 91 82 79 79 79 77 74 70 67 70 144 146 129 105 90 81 75 71 67 64 62 57 51 45 44 40 37 37 34 30 28 25 22 19 16 16 21 18 14 12 11 9 8 11 9 7 5 4 4 3 8 30 46 40 21 12 8 5 3 3 3 7 4 2 2 145 1578 1162 500 305 186 117 83 64 42 26 18 12 8 8 15 14 11 7 6 5 3 3 756 711 340 191 103 78 58 37 25 18 240 186 113 79 60 42 33 28 24 24 24 24 24 24 24 24 25 26 27 28 29 32 51 55 45 34 26 20 15 14 13 12 11 10 2989 386 17 96 1.0 5256 662 74 175 1.8 3539 253 67 114 1.2 1599 146 12 53 0.5 4141 1578 2 134 1.4 3377 756 3 109 1.1 827 60 10 28 0.3 Total Max Min Avg Runoff Oct 1250 73 5 40 0.4 Nov 979 141 5 33 0.3 1177 102 13 38 0.4 969 75 8 31 0.3 1051 70 19 38 0.4 Appendix D-2. Continued Day Oct Nov Dec A-44 Friends Creek (102), Water Year 2007 1 10 78 1069 2 9 79 1110 3 8 81 707 4 9 82 487 5 10 84 350 6 10 85 284 7 11 87 232 8 12 89 178 9 13 94 158 10 13 97 139 11 12 172 181 12 11 254 634 13 10 250 729 14 9 239 615 15 8 234 427 16 7 388 324 17 299 420 270 18 453 335 224 19 326 244 191 20 252 136 174 21 204 96 506 22 154 86 997 23 107 79 1069 24 90 74 658 25 80 71 455 26 75 71 340 27 80 70 275 28 91 67 244 29 93 67 207 30 87 223 183 31 81 366 Total Max Min Avg Runoff 2632 453 7 85 0.9 4434 420 67 148 1.5 13781 1110 139 445 4.6 Jan Feb Mar Apr May Jun 601 418 317 291 544 483 353 292 245 194 177 160 435 567 1026 878 586 342 250 198 172 150 141 140 139 137 136 135 134 112 107 101 96 94 91 88 86 83 81 78 76 74 71 69 67 65 60 56 53 49 46 43 43 74 173 1086 967 602 493 703 1171 645 438 331 247 185 146 129 147 165 153 141 126 109 94 87 80 78 81 78 80 100 186 202 169 136 130 744 436 582 744 588 405 313 249 204 173 149 129 108 112 167 156 140 143 142 131 119 100 90 85 82 79 76 83 204 305 266 200 161 138 115 99 92 88 79 73 71 69 68 65 60 53 49 54 108 108 83 76 72 68 64 65 65 65 65 65 65 66 58 53 51 47 46 44 41 33 31 30 26 23 22 21 19 18 17 15 13 12 13 10 8 9 25 104 162 143 161 180 278 262 9859 1026 107 318 3.3 4967 1086 43 177 1.7 8097 1171 78 261 2.7 5905 744 76 197 2.0 2319 138 49 75 0.8 1863 278 8 62 0.6 Jul Aug Sept 191 136 90 74 64 46 34 26 20 17 12 9 8 6 5 4 3 3 3 2 2 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 10 11 12 12 10 12 14 14 14 14 14 763 191 1 25 0.3 8 1 0 0 0.0 142 14 0 5 0.0 Appendix D-2. Concluded Day Oct Nov Dec A-45 Friends Creek (102), Water Year 2008 1 14 1 1 2 14 1 1 3 43 1 1 4 57 1 1 5 62 1 1 6 65 1 1 7 68 1 1 8 69 1 0 9 71 1 1 10 73 1 1 11 76 1 1 12 77 1 2 13 78 1 25 14 80 1 29 15 82 1 16 16 95 1 11 17 105 1 10 18 126 1 9 19 105 1 9 20 105 1 10 21 115 1 7 22 100 2 37 23 140 2 141 24 148 1 104 25 152 1 74 26 165 1 41 27 100 1 32 28 3 1 26 29 1 1 22 30 1 1 21 31 1 21 Total Max Min Avg Runoff 2393 165 1 77 0.8 27 2 1 1 0.0 655 141 0 21 0.2 Jan Feb Mar Apr May Jun Jul 22 22 22 23 22 21 22 223 604 480 349 286 241 198 164 131 100 86 75 72 70 68 67 67 67 67 67 67 66 66 66 66 66 66 66 852 3227 1283 700 590 468 359 255 192 130 81 66 404 710 406 251 160 100 74 60 45 37 27 23 27 181 282 356 447 287 201 160 140 113 93 97 154 211 228 214 174 158 475 746 732 506 367 280 236 206 179 157 284 284 240 206 214 193 174 169 148 130 118 101 94 141 360 279 212 174 153 145 130 114 104 90 84 80 76 73 76 81 76 75 71 66 3901 604 21 126 1.3 10792 3227 23 372 3.6 8393 746 93 271 2.8 4002 360 66 133 1.3 Aug Sept 69 77 79 68 59 58 61 65 65 67 117 217 191 161 183 260 258 204 164 131 103 91 85 84 83 84 76 73 78 77 386 405 253 1276 4360 2595 1227 1467 2303 1068 703 564 471 391 317 266 231 189 161 139 117 97 90 83 75 70 69 65 63 55 47 39 36 33 32 29 25 101 455 790 824 403 554 1213 1012 549 330 236 175 133 104 88 139 160 120 87 78 70 72 69 56 45 39 33 27 22 15 11 9 8 7 7 6 5 4 3 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 4 23 34 17 8 5 3 2 2 3 1065 2512 1292 717 499 356 269 200 138 94 80 70 60 51 44 38 38 3775 386 58 122 1.3 19216 4360 47 641 6.4 8054 1213 25 260 2.7 212 39 1 7 0.1 7627 2512 0 254 2.6 Appendix D-3. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Goose Creek (Station 103) Day Oct Nov A-46 Goose Creek (103), Water Year 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Total Max Min Avg Runoff - - Dec Jan Feb Mar Apr May - - - - - 50 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 36 39 39 34 31 31 31 29 30 - - - - - 1189 50 29 38 1.0 Jun Jul Aug Sept 43 34 32 32 49 180 131 96 77 66 57 51 47 43 40 37 34 32 74 200 150 100 72 57 49 43 37 35 33 75 69 118 200 150 100 82 68 50 50 50 40 40 275 150 75 50 50 50 350 150 75 50 50 50 125 180 90 75 55 45 35 29 27 24 20 18 15 14 12 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 28 23 18 20 26 80 400 200 100 50 50 50 50 50 100 50 50 200 225 110 60 2005 200 32 67 1.7 2997 350 35 97 2.5 387 29 9 12 0.3 2029 400 10 68 1.7 Appendix D-3. Continued Day A-47 Dec Jan Feb Mar Apr May Goose Creek (103), Water Year 1994 1 50 50 50 2 50 50 75 3 50 49 200 4 50 46 100 5 67 46 50 6 57 44 50 7 52 37 40 8 50 34 30 9 50 32 30 10 300 30 30 11 150 29 30 12 75 29 30 13 50 29 30 14 50 28 30 15 50 154 100 16 78 400 75 17 250 200 60 18 125 200 45 19 100 100 35 20 75 75 30 21 75 75 30 22 200 75 64 23 100 75 59 24 50 70 53 25 50 70 49 26 50 70 48 27 50 250 39 28 50 100 36 29 50 75 33 30 50 50 32 31 50 29 32 30 29 28 27 24 24 20 20 21 21 20 19 17 13 18 17 18 17 16 17 18 18 18 20 30 100 75 350 175 90 40 40 20 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 50 100 75 75 50 40 50 40 20 20 20 20 50 125 60 30 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 30 125 60 50 20 20 20 20 100 20 20 90 20 20 30 200 100 1400 600 300 150 75 75 50 50 50 50 66 58 55 50 48 300 150 250 125 150 75 75 50 75 100 500 250 125 70 70 80 70 70 70 50 25 25 25 25 25 25 25 35 56 60 43 37 34 32 29 27 26 24 23 23 22 21 22 26 23 21 20 22 21 19 18 17 16 15 14 13 12 11 17 15 11 10 8 8 1343 350 13 43 1.1 680 100 10 24 0.6 1050 125 20 34 0.9 4438 1400 20 148 3.7 2477 500 25 80 2.1 555 29 8 19 0.5 Total Max Min Avg Runoff Oct 2554 300 50 82 2.1 Nov 2569 400 28 86 2.1 1593 200 29 51 1.3 Jun Jul Aug Sept 10 10 10 9 8 15 55 35 21 15 13 11 11 10 9 8 7 6 6 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 291 55 0 9 0.2 0 0 0 0 0.0 0 0 0 0 0.0 Appendix D-3. Continued Day Oct Nov A-48 Goose Creek (103), Water Year 1995 1 0 0 2 0 0 3 0 0 4 0 0 5 0 3 6 0 14 7 0 11 8 0 10 9 0 10 10 0 13 11 0 12 12 0 11 13 0 11 14 0 13 15 0 14 16 0 13 17 0 12 18 0 12 19 0 10 20 0 10 21 0 16 22 0 16 23 0 14 24 0 14 25 0 13 26 0 12 27 0 12 28 0 18 29 0 17 30 0 14 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 325 18 0 11 0.3 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 13 13 13 12 12 11 20 55 42 34 29 24 22 20 18 20 34 31 25 23 21 19 18 17 17 16 15 15 14 14 14 13 14 15 15 15 15 15 15 15 15 14 13 13 13 13 14 15 18 18 19 19 19 19 19 19 19 19 20 21 22 23 24 24 23 22 21 21 22 22 22 20 19 19 19 19 18 17 16 14 14 14 13 13 13 13 12 12 13 13 12 13 13 13 10 10 10 300 170 115 89 73 59 48 41 37 34 32 31 30 28 25 24 22 20 20 21 22 21 20 20 19 19 18 18 16 17 17 18 18 17 17 25 75 40 30 75 250 200 400 250 250 125 65 30 30 30 31 28 27 27 27 26 24 23 22 21 21 21 225 172 164 123 107 144 110 119 970 559 462 255 180 142 118 411 311 187 148 221 151 118 101 85 72 69 59 53 48 44 39 35 118 164 96 68 54 45 39 36 33 32 31 30 29 26 26 26 25 24 22 21 20 19 18 18 18 18 16 15 14 14 14 14 13 13 12 12 11 11 11 10 10 10 10 10 9 8 8 7 7 7 6 6 6 5 5 6 6 7 18 25 20 15 13 11 10 9 8 7 7 7 5 5 5 3 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 650 55 11 21 0.5 518 23 13 17 0.4 492 24 12 18 0.4 1383 300 10 45 1.1 2184 400 16 73 1.8 5683 970 21 183 4.7 1470 164 20 49 1.2 369 19 6 12 0.3 208 25 0 7 0.2 0 0 0 0 0.0 Appendix D-3. Continued Day Oct Nov A-49 Goose Creek (103), Water Year 1996 1 0 1 2 0 3 3 0 4 4 0 1 5 0 1 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 34 12 0 20 13 0 13 14 0 8 15 0 6 16 0 5 17 0 5 18 0 6 19 0 6 20 0 6 21 0 6 22 0 5 23 0 4 24 0 3 25 0 3 26 0 2 27 0 2 28 0 1 29 0 1 30 0 1 31 1 Total Max Min Avg Runoff 1 1 0 0 0.0 149 34 0 5 0.1 Dec 1 1 1 1 1 1 1 1 0 0 0 0 0 2 2 2 2 3 5 6 6 6 7 7 7 7 7 7 7 7 7 104 7 0 3 0.1 Jan Feb Mar Apr May Jun Jul Aug Sept 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 13 93 107 50 26 19 16 16 15 13 16 16 16 16 16 16 16 16 16 16 16 16 17 14 12 11 10 10 9 9 9 9 8 8 8 7 7 7 7 7 7 7 7 7 7 6 6 5 15 24 13 12 10 10 9 9 9 9 9 9 9 9 9 9 9 9 9 9 10 9 8 8 8 8 11 25 24 20 17 14 13 13 13 12 12 11 12 12 11 11 11 10 10 10 10 10 56 57 16 13 13 13 13 82 70 40 32 26 23 23 23 25 38 45 316 301 161 122 111 98 83 71 60 52 46 39 34 32 51 66 69 366 198 130 92 67 56 53 107 104 75 62 55 51 55 84 58 47 39 34 30 28 26 25 22 20 18 18 17 22 22 19 17 16 15 14 13 13 12 11 11 10 10 10 9 8 7 7 7 7 6 6 6 5 4 2 15 14 11 9 9 8 8 8 7 7 6 5 4 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 4 2 0 0 0 3 5 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 555 107 7 18 0.5 305 17 7 11 0.3 295 24 5 10 0.2 614 82 10 20 0.5 2841 366 23 92 2.4 1207 107 14 40 1.0 266 15 2 9 0.2 32 5 0 1 0.0 0 0 0 0 0.0 Appendix D-3. Continued Day Oct Nov A-50 Goose Creek (103), Water Year 1997 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 3 8 0 3 9 0 5 10 0 3 11 0 1 12 0 1 13 0 0 14 0 0 15 0 0 16 0 0 17 0 1 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 1 26 0 2 27 0 3 28 0 3 29 0 3 30 0 8 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 41 8 0 1 0.0 Dec Jan Feb Mar Apr May Jun 12 12 11 11 11 11 10 11 11 11 11 10 9 8 8 8 8 11 11 11 11 10 10 18 15 12 6 1 3 3 7 7 8 9 10 13 13 14 15 16 16 16 16 16 16 17 18 18 18 18 18 18 74 133 88 59 49 41 36 33 30 29 26 35 42 90 74 44 31 25 21 20 19 16 16 15 13 13 12 17 24 96 285 193 128 97 74 121 456 208 149 120 98 77 65 55 49 43 108 132 92 66 60 108 74 55 50 44 40 39 36 31 28 26 27 23 23 24 22 19 18 18 18 18 18 18 17 16 14 13 13 13 13 14 13 13 13 13 13 14 13 13 12 12 12 11 11 11 12 11 13 13 12 58 58 40 30 25 25 21 18 19 18 18 17 15 14 15 15 16 13 13 12 12 13 17 39 117 70 50 39 34 32 39 41 35 32 39 52 90 133 88 64 103 131 87 59 50 40 35 31 29 27 25 23 21 20 19 18 18 17 16 301 18 1 10 0.2 885 133 7 29 0.7 2210 456 12 79 1.8 1802 149 18 58 1.5 409 18 11 14 0.3 874 117 12 28 0.7 1412 133 16 47 1.2 Jul Aug Sept 15 14 14 13 13 12 12 11 11 10 9 8 7 7 7 6 5 4 2 1 3 8 6 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 20 12 8 5 3 1 0 0 0 0 0 0 0 0 0 4 11 8 6 3 1 11 78 33 19 13 11 9 7 6 6 5 4 8 11 9 8 7 7 7 6 6 6 5 200 15 0 6 0.2 61 20 0 2 0.1 315 78 0 11 0.3 Appendix D-3. Continued Day Oct Nov Dec A-51 Goose Creek (103), Water Year 1998 1 5 6 104 2 4 6 66 3 4 6 51 4 4 5 39 5 4 6 32 6 4 8 26 7 3 7 22 8 3 9 20 9 3 9 20 10 4 8 22 11 3 8 27 12 3 7 33 13 5 7 32 14 6 8 27 15 4 8 24 16 3 6 22 17 3 6 20 18 3 5 19 19 3 6 18 20 3 6 16 21 3 8 15 22 2 7 17 23 2 6 16 24 2 5 26 25 2 6 58 26 5 7 43 27 6 7 35 28 5 13 31 29 5 30 29 30 4 100 25 31 3 20 Total Max Min Avg Runoff 114 6 2 4 0.1 326 100 5 11 0.3 957 104 15 31 0.8 Jan Feb Mar Apr May Jun Jul Aug Sept 20 19 18 17 24 45 48 164 178 113 78 59 44 39 36 32 29 25 23 22 22 20 20 19 18 18 18 23 28 26 25 25 22 21 21 20 19 18 18 17 17 30 49 40 33 31 31 40 64 56 51 49 44 40 36 32 32 35 33 32 31 30 27 24 23 23 59 126 135 78 56 52 53 51 48 141 310 177 296 283 201 138 112 96 79 65 224 163 112 91 91 72 63 87 75 63 57 59 53 44 40 38 38 54 54 49 39 35 34 32 33 31 29 29 28 28 24 23 26 169 199 209 614 397 224 158 246 294 179 130 107 89 83 69 61 54 47 44 42 40 37 43 84 142 111 77 61 53 48 45 44 39 38 34 33 33 30 28 28 59 62 73 173 125 158 556 416 296 189 300 159 120 128 193 119 92 72 61 52 48 50 41 36 33 31 27 27 35 45 32 27 23 21 19 17 16 15 14 13 12 11 10 9 10 8 7 6 5 5 3 2 2 1 0 0 0 1 2 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1270 178 17 41 1.1 922 64 17 33 0.8 3333 310 23 108 2.8 1496 169 23 50 1.2 4031 614 37 130 3.4 3765 556 28 126 3.1 562 45 2 18 0.5 11 3 0 0 0.0 0 0 0 0 0.0 Appendix D-3. Continued Day Oct Nov A-52 Goose Creek (103), Water Year 1999 1 0 0 2 0 0 3 0 0 4 0 1 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 0 0 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 2 1 0 0 0.0 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 3 3 9 20 42 54 32 28 35 29 18 15 17 28 34 33 25 19 19 95 127 82 58 50 46 38 34 31 29 26 24 22 20 18 17 18 17 17 16 18 17 15 17 36 31 28 30 27 29 30 22 20 20 27 28 32 38 36 27 23 23 23 21 20 19 19 18 17 17 16 15 17 17 15 16 16 15 20 16 14 59 74 51 42 36 33 84 212 172 128 102 79 83 71 57 46 42 40 47 85 59 46 41 37 35 33 33 37 37 32 28 26 26 25 42 59 48 40 37 33 29 28 28 30 30 28 24 21 20 19 18 18 18 20 69 48 47 160 87 53 40 33 30 29 28 295 223 125 85 59 45 37 32 29 27 38 209 218 127 113 77 55 43 41 36 30 26 23 21 19 17 16 14 13 12 12 11 11 10 8 8 7 6 6 6 5 4 3 3 5 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 22 9 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0.0 310 54 0 10 0.3 978 127 16 35 0.8 742 38 15 24 0.6 1778 212 14 59 1.5 958 59 18 31 0.8 2479 295 20 83 2.1 379 41 0 12 0.3 36 22 0 1 0.0 0 0 0 0 0.0 Appendix D-3. Concluded Day Oct Nov A-53 Goose Creek (103), Water Year 2000 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 0 0 31 0 0 Total Max Min Avg Runoff 1 0 0 0 0.0 0 0 0 0 0.0 Dec Jan Feb Mar Apr May Jun Jul Aug 0 0 0 0 5 4 1 1 0 1 0 0 0 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 2 3 2 1 1 1 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 2 5 5 5 5 5 4 50 56 22 15 13 10 9 8 8 7 7 7 8 6 6 6 6 5 5 5 6 4 4 4 4 4 4 4 3 3 5 29 25 15 13 13 11 10 11 10 8 7 7 7 7 7 6 6 6 6 5 4 4 7 7 7 7 7 7 15 15 13 18 28 22 19 58 56 34 27 22 18 15 26 23 21 21 20 19 19 20 30 41 32 44 98 51 38 34 32 29 26 23 22 22 23 21 19 19 160 182 108 72 54 45 39 35 36 45 34 31 30 29 27 27 51 144 106 101 59 43 37 34 44 218 146 142 267 171 117 82 61 52 45 40 38 36 34 44 39 34 31 30 28 28 26 23 21 19 17 16 15 14 13 12 11 11 10 9 7 6 6 5 6 6 2 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 0 1 5 0 0 0 0 32 5 0 1 0.0 13 1 0 0 0.0 247 56 0 9 0.2 249 29 3 8 0.2 460 58 4 15 0.4 1350 182 19 44 1.1 2298 267 27 77 1.9 637 44 5 21 0.5 19 5 0 1 0.0 Sept 0 0 0 0 0 0 0 0 0 7 6 3 End of data Appendix D-4. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Camp Creek (Station 104) Day Oct Nov A-54 Camp Creek (104), Water Year 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Total Max Min Avg Runoff - - Dec Jan Feb Mar Apr May Jun Jul Aug Sept - - - - - 64 60 59 60 94 74 61 53 46 42 39 38 36 33 32 29 27 27 25 24 22 21 23 23 20 18 18 18 17 18 25 20 19 19 28 105 76 56 45 39 33 30 27 25 23 21 20 19 43 44 40 62 42 33 28 25 22 20 19 44 40 69 156 102 64 48 40 35 43 34 27 24 39 200 180 160 140 170 120 170 70 41 35 36 84 134 79 48 35 26 20 17 16 14 12 10 9 8 7 5 10 20 80 200 1200 400 200 100 80 40 60 220 140 70 20 15 10 5 5 5 5 5 5 20 75 300 250 100 75 50 25 16 13 11 11 15 46 378 262 117 77 57 46 37 32 61 56 65 133 268 200 109 76 - - - - - 1142 94 17 37 0.9 1065 105 19 35 0.8 2446 200 17 79 1.9 2976 1200 5 96 2.4 2981 378 11 99 2.4 Appendix D-4. Continued Day Oct Nov A-55 Camp Creek (104), Water Year 1994 1 62 31 2 49 28 3 41 27 4 39 27 5 33 25 6 30 21 7 29 19 8 28 19 9 142 17 10 220 17 11 115 17 12 81 17 13 61 16 14 51 89 15 45 161 16 104 102 17 354 143 18 271 180 19 140 125 20 115 89 21 228 66 22 156 53 23 106 46 24 82 41 25 66 40 26 57 142 27 49 163 28 46 108 29 42 78 30 36 60 31 34 Total Max Min Avg Runoff 2913 354 28 94 2.3 1965 180 16 65 1.6 Dec Jan Feb Mar Apr May Jun 55 193 263 220 204 130 94 74 62 55 44 41 39 41 48 44 40 39 39 38 37 34 31 29 28 23 21 19 19 17 19 17 17 16 16 14 14 12 12 12 12 12 11 10 8 10 10 11 10 9 10 11 11 11 12 43 96 71 607 170 51 27 31 18 15 10 5 5 5 5 20 15 5 5 5 5 5 5 5 5 5 10 15 15 15 70 60 60 30 15 11 10 9 26 90 95 131 138 95 66 51 43 39 36 32 25 21 21 19 18 17 15 14 13 12 12 12 12 13 12 11 11 11 11 12 12 12 12 20 22 79 200 1883 515 221 181 159 106 84 66 52 45 38 34 32 29 28 225 203 286 186 215 123 93 72 59 56 318 288 134 94 71 69 58 50 44 37 33 31 28 26 24 22 21 20 32 35 25 22 20 18 17 16 15 14 13 13 13 12 13 15 13 12 12 13 12 11 10 10 9 9 8 8 7 7 10 9 7 6 5 5 4 2038 263 17 66 1.6 1349 607 8 44 1.1 464 70 5 17 0.4 1117 138 9 36 0.9 4776 1883 11 159 3.8 2156 318 17 70 1.7 310 16 4 10 0.2 Jul Aug Sept 4 4 4 3 3 2 2 2 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 30 4 0 1 0.0 0 0 0 0 0.0 0 0 0 0 0.0 Appendix D-4. Continued Day Oct Nov A-56 Camp Creek (104), Water Year 1995 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 1 7 0 1 8 0 2 9 0 2 10 0 2 11 0 2 12 0 2 13 0 2 14 0 2 15 0 2 16 0 2 17 0 2 18 0 2 19 0 2 20 0 2 21 0 3 22 0 7 23 0 7 24 0 5 25 0 5 26 0 4 27 0 3 28 0 8 29 0 8 30 0 5 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 81 8 0 3 0.1 Dec Jan Feb Mar Apr May Jun 4 4 4 3 2 1 12 29 25 19 15 12 10 9 8 7 20 22 16 15 12 11 10 9 8 7 6 6 5 5 5 5 5 4 4 4 4 4 4 4 4 4 6 102 250 210 118 83 60 84 124 76 48 36 30 24 21 20 19 16 15 14 14 13 12 12 11 10 8 8 8 8 8 8 8 8 7 5 3 3 3 3 3 3 4 4 3 3 3 3 3 2 3 3 3 3 83 167 94 68 58 47 37 31 27 24 21 19 17 17 16 14 13 11 11 10 10 11 11 11 11 10 10 9 9 7 7 8 7 7 7 6 22 23 17 14 13 14 63 87 54 49 37 33 30 26 21 20 17 16 16 16 15 14 13 12 12 11 11 96 134 127 100 92 211 124 144 1726 1032 628 373 196 98 104 527 421 240 200 416 256 127 84 49 45 39 34 32 29 27 24 22 20 19 17 16 15 14 13 12 11 11 10 14 18 33 50 35 24 18 17 16 14 320 29 1 10 0.3 1402 250 4 45 1.1 188 14 3 7 0.1 856 167 2 28 0.7 658 87 6 22 0.5 7560 1726 11 244 6.0 698 50 10 23 0.6 Jul Aug Sept 13 11 11 10 9 8 7 6 5 5 4 4 3 2 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 104 13 0 3 0.1 1 0 0 0 0.0 0 0 0 0 0.0 Appendix D-4. Continued Day Oct Nov A-57 Camp Creek (104), Water Year 1996 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 0 0 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 0 0 0 0 0.0 Dec Jan 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 28 68 45 25 17 12 12 12 11 9 9 9 9 9 1 0 0 0 0.0 278 68 0 9 0.2 Feb Mar Apr May 9 9 9 9 9 9 9 9 9 6 4 3 3 1 1 1 1 1 1 1 0 0 0 0 0 0 2 8 9 8 6 6 5 4 12 16 16 17 15 9 5 4 4 3 3 3 3 2 2 2 2 2 3 4 4 3 2 2 2 5 45 32 23 17 14 11 10 9 7 6 5 5 5 5 4 4 4 3 3 5 6 27 48 33 27 20 16 13 108 105 61 42 35 119 100 63 48 228 331 722 616 169 106 89 77 67 57 47 39 34 29 24 22 33 77 120 670 293 131 78 57 53 548 285 120 72 58 51 41 38 60 55 44 35 30 26 22 21 19 17 15 13 13 12 14 12 10 9 8 8 7 173 17 2 6 0.1 622 108 3 21 0.5 4584 722 22 148 3.6 1717 548 7 57 1.4 125 9 0 4 0.1 Jun Jul Aug Sept 6 5 5 4 3 3 3 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 0 0 4 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 35 6 0 1 0.0 9 4 0 0 0.0 0 0 0 0 0.0 Appendix D-4. Continued Day Oct Nov A-58 Camp Creek (104), Water Year 1997 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 3 9 0 3 10 0 1 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 0 10 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 19 10 0 1 0.0 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 17 14 11 7 5 5 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 2 2 2 2 3 2 2 1 1 1 1 2 2 3 15 26 17 7 2 2 2 2 2 2 2 2 2 2 2 2 6 51 103 71 51 40 32 20 13 13 13 19 49 72 210 126 52 31 21 18 16 15 13 12 11 9 7 6 6 15 47 186 171 101 68 52 127 729 228 133 106 78 59 46 38 33 29 60 118 73 51 46 146 89 54 45 39 34 32 30 24 19 18 18 17 16 16 16 14 12 11 11 11 11 11 11 10 8 7 7 7 7 8 7 6 5 5 5 5 6 5 5 5 5 4 4 3 4 4 4 4 4 48 67 42 29 22 20 18 15 14 14 12 12 10 8 7 7 7 7 5 5 5 5 5 7 24 20 16 13 13 15 16 19 17 16 14 14 82 197 86 64 114 203 84 58 50 41 37 33 31 28 25 23 21 21 20 18 18 17 17 18 17 16 14 13 12 11 10 9 8 7 6 5 4 4 4 3 3 3 2 2 2 2 2 2 2 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 39 31 24 20 19 17 15 15 13 13 14 14 12 12 11 22 29 25 22 18 16 20 31 40 35 30 26 23 21 19 19 18 17 17 29 30 27 25 23 22 22 21 20 19 129 17 1 4 0.1 515 103 1 17 0.4 2416 729 6 86 1.9 1509 146 12 49 1.2 201 11 3 7 0.2 485 67 4 16 0.4 1398 203 14 47 1.1 182 18 0 6 0.1 272 39 0 9 0.2 699 40 11 23 0.6 Appendix D-4. Continued Day Oct Nov A-59 Camp Creek (104), Water Year 1998 1 19 23 2 19 25 3 19 25 4 19 25 5 19 26 6 20 26 7 20 30 8 17 33 9 16 33 10 16 33 11 20 33 12 22 33 13 18 33 14 18 33 15 19 35 16 19 36 17 19 35 18 18 34 19 18 34 20 18 34 21 18 34 22 18 34 23 18 36 24 18 36 25 18 33 26 19 33 27 22 33 28 23 39 29 23 56 30 23 79 31 23 Total Max Min Avg Runoff 599 23 16 19 0.5 1033 79 23 34 0.8 Dec 95 67 56 49 44 40 37 35 35 36 46 47 45 42 39 37 36 35 34 33 32 32 35 41 80 64 55 49 46 43 39 1403 95 32 45 1.1 Jan 38 37 36 36 48 114 96 175 214 134 98 77 64 59 55 50 46 43 41 40 39 38 38 36 35 35 35 45 50 50 46 1950 214 35 63 1.5 Feb Mar Apr May Jun 45 43 39 39 38 38 37 36 35 34 38 48 45 42 40 40 47 76 72 65 62 58 55 51 48 47 49 48 48 48 47 44 42 41 41 66 167 149 108 91 81 81 80 74 151 369 212 370 463 263 156 123 105 91 79 400 284 141 110 105 88 81 161 121 96 85 77 70 60 55 54 53 53 52 51 46 42 42 42 42 41 40 39 39 39 37 35 44 121 159 223 1267 660 234 147 615 495 214 124 98 82 167 92 74 64 56 53 51 64 51 60 183 874 267 116 88 71 61 56 53 48 46 41 40 39 38 36 35 55 63 64 268 206 227 1046 689 408 155 436 167 101 123 70 55 49 44 40 36 33 31 4524 463 41 146 3.6 1912 161 35 64 1.5 6819 1267 51 220 5.4 4691 1046 31 156 3.7 1315 76 34 47 1.0 Jul Aug Sept 30 28 26 28 43 39 52 67 48 39 35 32 30 29 27 26 24 23 22 20 19 18 22 19 17 16 16 15 15 13 13 13 12 11 11 11 11 11 11 11 11 10 9 8 8 7 7 6 5 5 4 4 3 2 2 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 852 67 13 27 0.7 195 13 0 6 0.2 1 0 0 0 0.0 Appendix D-4. Continued Day Oct Nov A-60 Camp Creek (104), Water Year 1999 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 0 0 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 0 0 0 0 0.0 Dec Jan Feb Mar Apr May 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 4 57 175 174 105 72 65 56 43 37 36 54 56 53 44 36 35 110 181 121 89 78 111 79 61 56 53 51 48 44 40 37 35 35 34 33 32 34 35 35 36 73 61 53 54 52 49 50 42 39 42 56 54 50 48 46 44 42 40 39 37 35 33 32 31 31 31 30 29 27 26 23 25 24 21 29 28 27 32 32 32 32 31 31 67 290 219 150 115 95 101 95 79 64 59 56 53 65 60 52 51 48 46 44 43 41 38 34 30 30 30 30 39 61 51 46 43 40 35 32 32 44 51 45 38 34 30 28 26 25 26 0 0 0 0 0.0 829 175 0 27 0.7 1677 181 32 60 1.3 1321 73 27 43 1.0 2014 290 21 67 1.6 1187 61 25 38 0.9 Jun Jul Aug Sept 28 91 83 64 117 85 64 53 47 42 40 36 40 49 38 33 29 25 22 21 19 18 16 36 45 29 50 48 35 24 23 23 16 10 6 3 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 90 46 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1329 117 16 44 1.1 83 23 0 3 0.1 138 90 0 4 0.1 0 0 0 0 0.0 Appendix D-4. Continued Day Oct Nov A-61 Camp Creek (104), Water Year 2000 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 0 29 0 0 30 0 0 31 0 Total Max Min Avg Runoff 0 0 0 0 0.0 0 0 0 0 0.0 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 15 18 16 12 6 1 1 42 83 55 41 35 29 25 20 17 18 17 14 14 9 6 6 5 3 2 3 3 2 1 1 1 2 2 2 1 1 3 45 54 37 30 25 22 17 18 17 9 4 3 2 3 3 3 2 2 2 1 1 1 2 2 1 2 2 1 20 29 20 18 18 14 13 30 40 30 26 22 18 14 15 15 10 9 7 6 7 7 7 6 5 8 62 46 32 26 22 20 42 30 21 19 22 19 12 10 80 360 200 119 88 71 58 49 46 82 69 52 45 40 35 36 44 100 81 62 49 39 32 28 29 109 96 76 122 103 80 67 53 45 38 32 28 24 21 26 33 22 15 10 7 8 16 8 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 1 0 0 0 0.0 466 83 0 16 0.4 346 54 1 11 0.3 341 40 1 11 0.3 1331 360 5 43 1.1 1836 122 28 61 1.5 257 33 0 8 0.2 0 0 0 0 0.0 0 0 0 0 0.0 Appendix D-4. Continued Day Oct Nov A-62 Camp Creek (104), Water Year 2001 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 8 0 7 7 1 8 2 2 9 1 15 10 0 69 11 0 54 12 0 40 13 0 39 14 0 43 15 0 34 16 1 30 17 3 27 18 2 22 19 1 21 20 1 19 21 1 17 22 1 17 23 1 13 24 0 11 25 0 13 26 0 21 27 0 24 28 0 21 29 0 18 30 0 15 31 0 Total Max Min Avg Runoff 31 8 0 1 0.0 588 69 0 20 0.5 Dec Jan Feb Mar Apr May 12 10 9 9 10 11 11 10 9 6 26 85 59 41 30 20 10 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 4 4 3 2 2 2 1 1 1 1 0 0 3 31 44 40 36 32 29 24 20 17 17 17 17 17 17 53 463 228 105 82 67 49 42 34 37 49 126 141 92 70 56 90 128 102 83 68 54 46 39 38 33 149 1164 288 169 126 103 90 81 74 63 54 49 46 42 39 37 36 36 31 31 41 55 53 50 46 43 40 37 34 31 29 27 26 27 25 24 21 18 18 15 15 18 18 16 14 14 20 19 12 10 14 9 7 5 7 10 8 4 3 3 2 2 2 1 1 1 6 6 5 4 4 4 5 5 4 3 5 5 3 3 4 4 4 5 7 6 6 6 4 4 4 4 6 5 3 2 2 429 85 4 14 0.3 1131 463 0 36 0.9 3527 1164 33 126 2.8 1395 103 24 45 1.1 309 21 1 10 0.2 137 7 2 4 0.1 Jun Jul Aug Sept 4 5 4 4 13 46 77 48 33 25 21 17 13 11 10 7 5 4 4 2 2 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 360 77 0 12 0.3 0 0 0 0 0.0 0 0 0 0 0.0 0 0 0 0 0.0 Appendix D-4. Concluded Day Oct Nov A-63 Camp Creek (104), Water Year 2002 1 0 12 2 0 12 3 0 9 4 0 6 5 0 5 6 0 5 7 0 4 8 0 4 9 0 5 10 0 6 11 0 7 12 0 6 13 0 6 14 0 4 15 1 5 16 5 5 17 14 5 18 12 8 19 7 4 20 3 2 21 1 2 22 1 2 23 0 4 24 9 4 25 72 4 26 66 2 27 40 1 28 27 1 29 20 3 30 16 23 31 14 Total Max Min Avg Runoff 306 72 0 10 0.2 169 23 1 6 0.1 Dec Jan Feb Mar Apr May Jun Jul 40 28 22 19 16 15 14 13 11 9 9 9 12 21 43 40 95 138 99 69 54 48 46 38 34 31 29 26 24 23 22 22 22 23 24 23 17 16 17 12 10 7 7 8 8 7 5 5 6 6 5 6 5 5 5 3 3 3 4 4 8 173 298 201 148 116 84 68 58 48 44 44 45 48 37 34 34 30 25 22 100 393 294 183 141 115 94 79 65 58 51 68 144 100 75 74 77 71 112 131 92 78 68 60 54 47 47 44 41 42 37 33 35 34 34 34 32 60 178 219 164 124 101 76 63 55 50 47 66 102 77 67 60 52 48 45 40 37 35 34 32 65 106 74 65 73 59 122 364 223 152 120 95 72 60 52 59 135 150 240 194 187 699 650 309 184 166 229 180 138 107 85 72 64 56 49 43 40 53 66 47 40 35 32 28 27 30 30 26 24 23 22 109 311 199 224 134 96 71 56 45 37 32 29 26 23 30 30 24 18 14 12 10 8 7 5 4 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1101 138 9 36 0.9 471 173 3 15 0.4 2907 393 22 104 2.3 2333 219 32 75 1.9 2515 364 32 84 2.0 4639 699 40 150 3.7 1796 311 12 60 1.4 38 10 0 1 0.0 Aug End of data Sept Appendix D-5. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Sangamon River near Mahomet (Station 105) Day Oct Nov Dec Jan A-64 Sangamon River near Mahomet (105), Water Year 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Total Max Min Avg Runoff - - - - Feb Mar Apr May Jun Jul Aug Sept - - - 626 550 505 479 500 1106 1003 748 619 522 450 377 348 334 305 276 247 225 215 203 189 180 174 162 218 203 189 174 160 218 276 348 247 363 631 641 1246 1230 842 642 745 989 777 647 494 416 358 313 289 397 535 928 1080 747 508 406 351 306 273 1002 3553 2610 3263 5046 3828 2277 1305 864 667 581 492 421 541 519 403 699 671 486 413 351 552 442 322 267 428 970 3219 2407 1183 709 500 389 319 273 236 199 183 158 149 136 117 106 120 128 238 368 226 161 141 165 145 136 734 757 387 273 225 191 167 133 115 100 109 115 94 207 2233 3045 1972 1494 2784 1914 1086 628 438 261 232 276 783 943 899 725 479 334 290 247 276 261 247 392 754 957 1063 - - - 11775 1106 160 380 1.2 21302 3553 247 710 2.2 36824 5046 267 1188 3.8 6895 757 100 222 0.7 25424 3045 94 847 2.6 Appendix D-5. Continued Day Oct Nov Dec Jan A-65 Sangamon River near Mahomet (105), Water Year 1994 1 1015 355 754 232 2 653 319 1015 196 3 435 291 1450 174 4 363 287 1668 160 5 319 280 1450 145 6 290 271 1131 131 7 276 233 873 116 8 261 212 684 110 9 580 200 573 113 10 928 189 502 122 11 1305 180 468 112 12 1015 177 390 106 13 732 178 355 102 14 508 242 344 97 15 421 583 397 94 16 580 1108 655 93 17 870 916 567 91 18 1233 924 470 91 19 1740 1668 496 93 20 3335 1378 500 93 21 2610 985 452 96 22 2030 734 413 100 23 1595 597 365 107 24 1421 509 323 123 25 1247 464 297 165 26 1073 468 276 381 27 798 1019 261 597 28 653 1740 247 393 29 537 1305 232 1183 30 454 943 203 1494 31 389 218 722 Total Max Min Avg Runoff 29661 3335 261 957 3.0 18754 1740 177 625 1.9 18029 1668 203 582 1.8 7831 1494 91 253 0.8 Feb Mar Apr May Jun 289 218 189 167 145 123 116 109 102 97 91 86 81 81 102 290 493 421 464 499 567 564 361 260 189 145 123 112 104 102 116 145 363 580 943 1211 1450 1088 841 667 551 479 406 354 293 252 254 216 197 197 175 167 165 154 145 207 236 200 174 162 160 155 177 191 184 171 155 180 206 355 554 13413 11180 2828 1668 1337 1047 844 695 561 484 426 373 344 313 286 273 273 436 444 771 700 548 457 396 355 564 903 745 570 474 422 365 341 348 303 270 249 233 225 213 200 190 186 202 202 171 155 148 142 136 129 120 115 112 110 109 103 104 138 119 107 100 96 91 84 78 75 73 70 80 77 68 64 71 68 58 57 52 48 6480 567 81 231 0.7 12431 1450 102 401 1.3 39428 13413 155 1314 4.0 11493 903 142 371 1.2 2712 138 48 90 0.3 Jul Aug Sept 46 45 39 44 46 41 110 229 78 54 41 35 29 28 28 41 29 23 23 16 25 21 21 20 20 20 19 19 18 17 17 19 21 20 29 28 27 26 26 32 30 28 28 27 44 60 39 28 28 28 27 27 26 26 25 25 25 24 24 23 23 23 22 22 22 21 21 21 20 20 20 19 17 15 14 13 12 12 11 8 6 5 4 3 3 2 2 2 4 3 1 0 1239 229 16 40 0.1 865 60 19 28 0.1 343 22 0 11 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-66 Sangamon River near Mahomet (105), Water Year 1995 1 0 0 115 99 2 0 0 98 101 3 0 0 85 100 4 0 7 75 101 5 0 35 68 102 6 0 139 64 102 7 0 238 443 102 8 0 158 1165 102 9 0 112 1185 102 10 0 102 954 102 11 7 105 445 99 12 8 100 326 92 13 5 79 251 504 14 2 70 202 1352 15 0 78 172 1660 16 0 87 161 1700 17 0 74 234 1433 18 0 64 317 1152 19 0 56 271 1114 20 0 47 215 1404 21 0 62 187 1570 22 0 107 163 1597 23 0 105 150 1240 24 0 81 140 617 25 0 69 130 420 26 0 61 122 361 27 0 61 116 244 28 0 106 113 228 29 0 222 109 220 30 0 158 102 220 31 0 99 188 Total Max Min Avg Runoff 23 8 0 1 0.0 2582 238 0 86 0.3 8279 1185 64 267 0.8 18427 1700 92 594 1.9 Feb Mar Apr May Jun Jul Aug Sept 164 165 156 147 141 141 148 153 138 119 119 119 119 119 107 97 90 77 78 79 75 69 66 65 59 58 62 62 60 62 64 75 84 86 590 1371 1416 1267 1047 787 460 382 327 289 249 217 202 200 189 174 180 240 212 189 208 356 310 252 216 192 176 162 157 139 131 132 136 189 492 1173 1309 1346 1227 894 450 384 833 1240 1237 1139 1046 587 422 377 317 297 265 232 224 214 203 187 171 162 151 144 143 608 1179 1403 2220 1846 1347 1386 1563 2107 2074 2406 2654 2388 1662 1191 1356 2732 3880 2777 1983 1567 1396 1179 1034 669 452 385 340 321 335 290 250 1118 1360 1201 629 371 306 254 218 196 181 183 227 175 171 1035 727 333 235 223 326 386 258 185 155 141 136 126 112 101 91 85 78 71 66 59 54 41 35 29 29 28 26 24 22 21 20 19 19 19 19 19 18 18 18 18 24 100 99 142 341 363 388 314 160 102 65 42 25 22 35 174 124 137 88 50 28 21 21 21 21 21 20 20 20 19 19 18 18 18 18 18 18 18 18 18 17 17 17 17 17 16 16 16 16 15 13 12 12 12 12 11 11 11 2990 165 58 107 0.3 11756 1416 60 379 1.2 16903 1346 131 563 1.7 44280 3880 143 1428 4.5 13931 1360 171 464 1.4 2110 258 18 68 0.2 3022 388 18 97 0.3 477 20 11 16 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-67 Sangamon River near Mahomet (105), Water Year 1996 1 11 47 51 42 2 11 133 53 40 3 10 303 47 40 4 10 275 44 40 5 10 160 38 40 6 10 116 30 40 7 9 100 28 40 8 9 82 25 40 9 9 62 25 40 10 9 48 25 40 11 9 110 25 40 12 9 414 25 40 13 9 369 25 40 14 9 259 24 39 15 8 192 32 39 16 8 164 36 39 17 7 146 27 46 18 7 158 23 612 19 7 185 42 1349 20 7 163 77 1323 21 6 143 63 1037 22 6 124 55 393 23 6 110 55 239 24 6 99 55 316 25 6 78 51 241 26 5 73 44 160 27 5 75 44 153 28 5 78 44 148 29 21 66 44 145 30 21 52 44 141 31 21 44 137 Total Max Min Avg Runoff 287 21 5 9 0 4387 414 47 146 0 1245 77 23 40 0 7077 1349 39 228 1 Feb Mar Apr May Jun Jul Aug Sept 134 130 127 124 121 118 116 111 112 113 105 87 68 58 57 52 45 45 45 49 43 34 29 33 37 35 45 84 85 64 47 35 30 56 95 122 121 123 108 75 58 53 51 49 50 54 56 56 56 51 57 61 64 82 90 70 61 59 58 72 190 283 237 184 143 117 108 102 88 77 70 69 69 62 58 58 55 46 48 67 72 94 303 295 214 180 141 117 173 300 288 209 169 160 154 374 372 438 1218 1532 4228 4058 2317 1515 1274 1238 1231 1126 912 477 390 345 310 286 306 337 1020 1460 2044 1751 1298 1036 1241 1461 1644 1351 1085 766 450 391 373 1034 1053 623 420 345 303 376 645 1171 584 326 267 231 206 178 152 138 129 122 114 108 101 91 80 70 63 58 53 46 37 29 23 20 19 19 24 20 19 18 18 29 187 218 122 91 75 51 33 29 31 80 106 57 34 21 19 18 18 18 18 18 18 17 17 17 17 17 16 30 94 49 21 19 18 18 18 18 18 18 17 17 17 17 17 16 16 16 16 16 16 16 16 16 15 15 15 14 14 14 14 14 14 14 14 14 13 13 13 13 13 13 13 2242 134 29 77 0 2084 123 30 67 0 4019 303 46 134 0 32834 4228 154 1059 3 18217 1644 114 607 2 1861 218 18 60 0 819 106 16 26 0 439 17 13 15 0 Appendix D-5. Continued Day Oct Nov Dec Jan A-68 Sangamon River near Mahomet (105), Water Year 1997 1 13 0 67 28 2 13 0 88 33 3 13 0 80 46 4 12 0 67 64 5 12 1 60 81 6 12 1 60 113 7 12 36 64 88 8 11 58 57 71 9 11 74 52 105 10 11 57 49 96 11 9 38 50 97 12 8 22 97 97 13 7 19 159 97 14 5 14 124 97 15 4 10 106 97 16 3 9 96 97 17 3 8 85 97 18 2 7 72 97 19 1 7 69 97 20 1 7 69 96 21 1 7 66 87 22 0 6 53 292 23 0 5 57 1175 24 0 5 65 1185 25 0 5 66 1129 26 0 9 126 995 27 0 10 152 417 28 0 12 92 259 29 0 14 64 239 30 0 33 49 232 31 0 33 209 Total Max Min Avg Runoff 163 13 0 5 0.0 475 74 0 16 0.0 2393 159 33 77 0.2 7916 1185 28 255 0.8 Feb Mar Apr May Jun Jul Aug Sept 163 207 415 1036 1294 1242 875 367 260 214 203 181 157 123 112 100 82 90 221 620 1576 2079 2103 1540 1242 1108 2143 3001 2400 1577 1319 1172 1064 818 460 405 706 1230 1216 1100 871 1196 1215 1062 602 444 396 371 351 323 278 236 230 232 202 200 206 197 175 161 151 149 151 156 162 158 139 125 120 123 136 161 167 143 133 128 122 126 153 151 138 126 118 111 104 97 102 104 100 103 99 178 542 408 294 209 176 163 142 126 123 119 113 105 94 84 84 91 89 72 61 57 57 122 678 1090 1790 1752 1210 763 613 667 867 822 634 509 836 713 819 722 552 461 741 852 718 508 404 336 292 250 222 202 178 159 168 576 342 213 167 145 255 261 158 126 109 99 84 71 112 325 130 82 60 54 54 55 38 28 26 17 16 15 13 11 10 9 7 6 5 4 4 3 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 316 628 514 186 115 77 47 35 36 21 16 15 14 13 13 13 12 12 11 12 12 13 21 21 54 77 36 17 13 10 7 5 3 2 2 1 1 1 1 1 0 0 0 0 0 22755 3001 82 813 2.3 22254 2400 175 718 2.3 4016 167 97 134 0.4 10993 1790 57 355 1.1 14687 867 145 490 1.5 2247 325 4 72 0.2 2061 628 1 66 0.2 357 77 0 12 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-69 Sangamon River near Mahomet (105), Water Year 1998 1 0 1 112 87 2 0 1 100 94 3 0 1 77 88 4 0 1 59 76 5 0 1 49 94 6 0 1 37 328 7 0 2 30 517 8 0 2 23 774 9 0 2 23 1188 10 0 3 25 1241 11 0 3 33 1194 12 0 3 41 1153 13 0 4 39 925 14 0 4 30 394 15 1 5 28 309 16 1 6 33 271 17 1 7 29 225 18 1 7 25 194 19 1 7 23 173 20 1 7 21 158 21 1 7 20 144 22 1 7 24 139 23 1 7 30 135 24 1 7 42 128 25 1 8 114 121 26 2 10 218 115 27 2 10 202 111 28 2 10 153 116 29 1 16 131 139 30 1 81 120 168 31 1 95 174 Total Max Min Avg Runoff 20 2 0 1 0.0 225 81 1 7 0.0 1990 218 20 64 0.2 10972 1241 76 354 1.1 Feb Mar Apr May Jun Jul Aug Sept 171 172 163 153 149 142 131 123 117 112 120 172 285 267 217 193 204 347 485 456 410 357 321 290 251 226 239 267 270 250 232 212 187 168 159 214 465 722 1356 2199 1557 954 627 549 737 1891 2680 2633 2611 2419 2101 1604 1100 771 624 1110 1539 1201 920 729 682 601 648 691 635 540 578 869 1002 694 523 451 521 664 565 463 380 337 316 310 310 284 257 240 227 209 181 190 335 616 800 1183 2129 2257 1813 1726 2561 3601 3023 1934 1025 631 501 424 381 340 303 274 267 267 247 278 380 540 453 346 291 251 242 229 200 177 164 154 149 140 130 124 165 363 390 958 1267 1176 1619 2546 4811 4615 3482 2433 1577 905 1647 2002 1684 865 518 510 503 1029 722 594 532 488 450 486 770 571 454 356 309 242 203 178 157 141 127 115 106 98 83 73 161 182 117 82 62 52 43 33 26 21 21 21 226 139 102 65 90 76 46 30 16 13 12 10 9 8 7 6 5 4 3 2 2 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6541 485 112 234 0.7 34062 2680 159 1099 3.5 14431 1002 181 481 1.5 29312 3601 229 946 3.0 36304 4811 124 1210 3.7 8012 770 26 258 0.8 938 226 0 30 0.1 3 0 0 0 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-70 Sangamon River near Mahomet (105), Water Year 1999 1 0 0 2 1 2 0 0 2 1 3 0 0 2 1 4 0 3 2 1 5 0 11 2 1 6 0 16 2 1 7 0 12 2 1 8 0 11 2 1 9 0 10 1 1 10 0 10 1 1 11 0 9 1 1 12 0 9 1 1 13 0 8 1 1 14 0 7 1 1 15 0 6 1 1 16 0 5 1 1 17 0 5 1 1 18 0 4 0 1 19 1 4 0 1 20 1 4 0 1 21 0 3 1 7 22 0 3 1 614 23 0 3 1 1882 24 0 3 1 2229 25 0 3 1 1943 26 0 3 1 1492 27 0 2 1 869 28 0 2 1 693 29 0 2 1 567 30 0 2 1 409 31 0 1 336 Total Max Min Avg Runoff 7 1 0 0 0.0 161 16 0 5 0.0 38 2 0 1 0.0 11064 2229 1 357 1.1 Feb Mar Apr May Jun Jul Aug Sept 473 603 625 520 371 300 486 1250 1385 1225 850 764 626 441 362 334 324 313 279 239 205 182 172 166 160 150 147 177 211 193 343 452 366 354 391 340 318 281 224 200 215 233 230 253 316 332 272 213 197 183 163 152 142 130 125 123 121 116 114 113 112 110 109 109 110 112 110 126 215 228 245 187 157 227 1094 2482 2841 2157 1423 904 694 585 487 411 370 347 343 309 280 287 272 259 248 241 237 228 208 190 178 172 169 187 314 386 320 278 299 276 234 211 216 199 190 182 166 152 143 138 133 132 136 372 781 829 666 626 486 362 294 254 227 206 262 490 706 796 502 314 255 226 202 183 170 195 393 479 382 375 286 229 202 274 308 222 176 152 136 124 114 107 96 85 75 68 63 62 60 59 58 62 48 45 42 40 37 35 33 38 38 35 33 29 26 23 22 22 21 21 21 21 20 20 20 20 20 20 21 21 20 20 20 19 19 19 18 18 17 17 16 15 15 14 13 12 11 10 7 3 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 20 17 13130 1385 147 469 1.3 7301 452 114 236 0.7 16998 2841 109 567 1.7 6845 386 132 221 0.7 11684 829 136 389 1.2 2925 308 33 94 0.3 614 29 14 20 0.1 118 20 1 4 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-71 Sangamon River near Mahomet (105), Water Year 2000 1 17 26 38 32 2 19 30 37 31 3 19 32 37 31 4 20 32 37 33 5 18 33 39 32 6 19 33 45 31 7 22 35 39 31 8 22 36 33 31 9 23 38 33 30 10 23 38 33 29 11 21 38 33 28 12 21 38 31 27 13 21 42 31 27 14 21 44 31 27 15 19 43 32 27 16 22 42 33 26 17 27 40 33 24 18 23 40 33 23 19 23 39 33 23 20 22 40 32 23 21 22 40 31 23 22 24 40 31 23 23 23 41 30 23 24 22 42 30 23 25 23 40 29 23 26 24 40 29 22 27 24 41 29 22 28 24 40 29 21 29 25 39 30 21 30 24 38 31 22 31 23 32 22 Total Max Min Avg Runoff 681 27 17 22 0.1 1138 44 26 38 0.1 1024 45 29 33 0.1 810 33 21 26 0.1 Feb Mar Apr May Jun Jul Aug Sept 23 23 24 24 24 24 24 24 24 24 27 37 41 43 42 41 40 91 173 183 149 129 124 118 109 99 95 93 90 84 75 67 59 56 54 50 48 47 45 45 44 43 42 42 41 40 39 44 88 182 179 137 119 110 101 95 89 84 78 73 68 63 58 54 51 49 48 49 46 45 48 45 43 42 41 41 57 80 80 77 109 223 172 149 145 146 129 119 112 102 84 84 87 83 77 72 67 67 75 100 110 100 94 82 69 61 61 87 138 131 122 114 106 99 90 77 150 604 695 472 330 255 208 176 154 148 139 121 107 101 93 86 94 171 146 132 113 98 83 74 76 208 639 590 596 595 471 324 240 194 164 140 119 107 100 113 173 154 108 86 75 80 71 60 53 47 41 36 33 30 27 25 23 20 18 16 15 14 13 19 36 18 16 16 19 12 11 11 11 10 10 10 9 5 1 1 1 0 2 8 5 6 10 11 200 60 23 15 14 13 12 10 7 1 1 1 0 0 0 0 0 0 10 12 19 23 24 18 12 10 9 1 3 1 1 1 8 16 24 24 19 15 12 1964 183 23 68 0.2 2300 182 39 74 0.2 2491 223 41 83 0.3 4588 695 61 148 0.5 6594 639 74 220 0.7 1869 173 13 60 0.2 539 200 0 17 0.1 266 24 0 9 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-72 Sangamon River near Mahomet (105), Water Year 2001 1 11 22 75 139 2 11 22 72 157 3 10 22 68 148 4 11 26 68 127 5 22 24 70 104 6 45 26 70 84 7 43 36 69 67 8 37 43 67 54 9 32 89 65 46 10 27 276 63 43 11 22 327 99 43 12 19 245 240 43 13 17 192 206 44 14 17 190 162 45 15 25 176 136 56 16 27 151 119 151 17 31 126 102 174 18 31 108 89 117 19 27 95 79 80 20 26 86 72 71 21 28 77 66 67 22 28 70 61 64 23 28 68 57 62 24 33 65 55 62 25 43 65 53 61 26 54 74 53 61 27 62 84 55 64 28 64 86 62 83 29 42 84 73 333 30 23 78 91 1122 31 23 114 1674 Total Max Min Avg Runoff 919 64 10 30 0.1 3034 327 22 101 0.3 2730 240 53 88 0.3 5444 1674 43 176 0.6 Feb Mar Apr May Jun 1350 1248 1147 749 489 452 421 557 978 1805 2364 1495 801 780 1126 1129 913 615 465 399 336 294 275 583 3206 4673 3547 1910 1169 808 633 540 479 415 363 328 300 272 253 243 242 234 216 233 361 528 528 468 406 352 311 280 249 223 215 206 200 197 190 183 172 161 153 144 151 301 544 293 230 257 594 550 381 321 301 268 229 208 206 202 196 179 175 160 147 146 139 126 119 124 126 124 124 115 132 147 132 121 107 111 105 98 92 91 92 93 112 250 267 201 165 134 113 124 130 211 370 301 233 196 238 255 333 378 485 602 916 1119 846 531 420 356 303 258 231 212 183 160 152 143 142 163 180 148 125 108 97 89 84 80 34106 4673 275 1218 3.5 11444 1169 190 369 1.2 7233 594 119 241 0.7 4740 370 91 153 0.5 9339 1119 80 311 1.0 Jul 73 67 71 88 99 90 68 58 54 49 45 41 38 34 31 27 26 28 27 25 23 21 21 20 19 18 17 15 16 15 17 1239 99 15 40 0.1 Aug Sept 15 14 13 11 9 9 8 7 5 4 2 3 2 1 0 0 0 3 10 8 14 12 14 11 14 18 14 15 15 14 45 25 68 32 19 14 10 8 10 29 24 17 17 12 8 3 0 0 1 3 1 4 11 8 3 0 0 0 0 0 0 308 45 0 10 0.0 327 68 0 14 0.0 Appendix D-5. Continued Day Oct Nov Dec Jan A-73 Sangamon River near Mahomet (105), Water Year 2002 1 0 186 277 157 2 0 184 358 147 3 0 175 269 152 4 0 156 217 160 5 7 136 185 165 6 10 129 165 147 7 7 123 151 133 8 14 119 137 118 9 14 116 125 112 10 13 111 114 120 11 14 102 103 105 12 23 99 99 92 13 28 93 105 90 14 83 86 128 87 15 210 85 199 82 16 239 84 281 77 17 188 81 346 71 18 202 78 666 67 19 144 75 671 66 20 110 73 495 73 21 89 71 372 70 22 78 68 312 67 23 75 66 299 68 24 197 69 306 64 25 491 67 275 64 26 912 67 239 59 27 750 68 222 56 28 406 62 208 56 29 301 65 195 60 30 246 90 182 79 31 206 169 627 Total Max Min Avg Runoff 5055 912 7 187 0.5 2985 186 62 100 0.3 7870 671 99 254 0.8 3493 627 56 113 0.4 Feb Mar Apr May Jun Jul Aug Sept 1621 2088 1732 1140 688 517 444 384 338 322 328 342 329 284 266 257 235 211 405 1560 1842 1669 1214 767 595 512 460 412 372 373 803 968 786 607 705 883 1046 1372 1398 1000 679 580 515 454 400 377 346 331 313 278 266 264 267 251 243 302 610 769 749 589 486 422 352 314 294 280 300 425 504 446 396 353 320 305 282 258 241 231 223 278 436 452 374 344 311 434 1359 1731 1824 1328 823 612 497 428 405 407 370 455 786 922 1468 3714 4352 2954 1783 1231 1015 961 831 651 547 488 456 428 384 344 333 367 330 299 278 260 242 230 253 383 420 336 286 271 318 606 867 1447 1284 947 586 442 365 314 277 252 234 219 204 265 287 362 233 182 159 142 128 117 107 95 85 77 71 67 68 58 52 47 43 39 35 32 31 31 35 29 32 31 41 39 33 32 42 43 55 48 36 28 23 21 18 16 15 14 13 12 12 11 12 13 25 20 15 52 97 181 101 1157 1292 1439 883 321 197 136 103 81 67 57 49 44 39 35 31 31 31 29 27 24 23 21 20 20 19 21 23 25 26 26 24 21 18 17 16 15 15 15 20961 2088 211 749 2.1 18308 1398 243 591 1.9 14563 1824 223 485 1.5 29969 4352 299 967 3.1 12649 1447 182 422 1.3 1895 159 29 61 0.2 6390 1439 11 206 0.7 827 67 15 28 0.1 Appendix D-5. Concluded Day Oct Nov Dec Jan A-74 Sangamon River near Mahomet (105), Water Year 2003 1 14 19 25 79 2 18 21 24 86 3 15 22 25 69 4 16 21 26 62 5 17 24 25 54 6 16 24 25 52 7 17 23 25 47 8 18 25 24 45 9 16 28 24 43 10 15 29 24 41 11 15 26 24 40 12 15 23 24 40 13 13 25 24 39 14 13 28 24 38 15 13 29 24 37 16 12 27 25 37 17 12 27 25 37 18 13 28 33 37 19 18 28 58 37 20 16 28 86 37 21 16 28 86 37 22 17 29 67 37 23 18 28 53 37 24 17 29 48 37 25 18 29 45 37 26 17 28 42 36 27 17 27 39 36 28 17 27 37 37 29 19 26 35 39 30 20 25 36 41 31 19 55 43 Total Max Min Avg Runoff 497 20 12 16 0.1 781 29 19 26 0.1 1138 86 24 37 0.1 1371 86 36 44 0.1 Feb Mar Apr May 47 53 54 54 52 49 47 45 42 40 40 39 39 39 44 50 44 39 38 38 41 62 84 86 79 64 49 36 31 32 32 33 39 44 48 62 87 133 157 90 93 89 86 74 68 68 67 65 63 106 130 106 88 78 75 72 69 67 61 55 53 53 52 138 427 387 539 518 395 309 254 209 175 156 143 137 125 112 113 117 111 99 90 97 111 108 95 88 85 End of data 2310 157 31 75 0.2 5349 539 52 178 0.5 1392 86 36 50 0.1 Jun Jul Aug Sept Appendix D-6. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Big Ditch (Station 106) Day Oct Nov A-75 Big Ditch (106), Water Year 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Total Max Min Avg Runoff - - Dec Jan Feb - - - - - - Mar Apr May Jun Jul Aug Sept - - 100 50 50 100 75 50 25 25 25 25 25 25 100 75 50 25 25 25 25 20 20 20 80 100 60 20 15 15 14 16 24 16 28 29 122 247 87 53 41 37 30 30 38 28 24 21 19 18 51 33 37 33 23 20 19 17 16 16 260 218 270 956 615 345 154 90 53 41 39 31 25 24 20 279 161 104 100 50 100 50 30 18 17 74 190 600 300 100 75 50 25 20 18 17 15 14 13 12 12 11 11 11 12 61 41 22 17 16 15 13 14 54 24 18 15 13 8 0 0 0 0 0 5 8 18 419 121 52 51 42 30 24 19 16 16 15 131 492 148 81 53 40 34 29 26 24 21 49 102 172 88 52 50 - - 1304 100 14 42 1.3 1881 270 16 63 1.8 4736 956 17 153 4.6 483 61 0 16 0.5 2423 492 8 81 2.4 Appendix D-6. Continued Day Oct Nov A-76 Big Ditch (106), Water Year 1994 1 50 7 2 50 6 3 25 6 4 25 6 5 25 4 6 25 2 7 25 5 8 50 10 9 130 16 10 65 16 11 50 16 12 40 16 13 30 16 14 25 92 15 25 86 16 100 48 17 300 130 18 130 100 19 65 80 20 120 70 21 150 60 22 75 50 23 50 40 24 25 30 25 25 32 26 20 197 27 20 112 28 15 66 29 12 47 30 11 38 31 10 Total Max Min Avg Runoff 1767 300 10 57 1.7 1406 197 2 47 1.4 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 35 186 126 113 103 66 48 41 38 39 40 41 42 43 43 35 32 36 34 33 32 29 25 24 23 22 22 22 21 20 19 18 17 16 15 14 14 14 13 13 13 13 10 9 9 9 9 9 9 9 9 9 9 10 11 77 87 77 233 13 13 13 13 13 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 20 20 25 50 30 30 30 30 20 20 20 20 20 20 30 50 118 66 20 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 75 30 10 10 10 10 25 120 65 65 65 40 30 75 150 500 2500 1414 490 311 200 133 104 78 60 50 43 38 36 40 120 500 250 150 150 70 60 60 54 46 41 130 105 69 53 46 39 36 34 32 28 26 25 23 22 21 21 20 19 19 18 16 15 15 15 14 14 12 6 3 3 3 2 3 4 4 4 4 3 2 1 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 2 13 13 12 9 4 2 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 0 0 0 3 8 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1431 186 19 46 1.4 793 233 9 26 0.8 450 50 10 16 0.4 679 118 10 22 0.7 7812 2500 10 260 7.7 1193 130 14 38 1.2 72 14 0 2 0.1 69 13 0 2 0.1 22 8 0 1 0.0 5 0 0 0 0.0 Appendix D-6. Continued Day Oct Nov A-77 Big Ditch (106), Water Year 1995 1 0 0 2 0 1 3 0 0 4 0 1 5 0 11 6 0 23 7 0 12 8 0 8 9 0 6 10 3 10 11 0 10 12 0 6 13 0 4 14 0 6 15 0 7 16 0 6 17 0 5 18 0 4 19 0 2 20 0 1 21 0 14 22 0 11 23 0 8 24 0 6 25 0 5 26 0 3 27 0 8 28 0 12 29 0 8 30 0 5 31 0 Total Max Min Avg Runoff 8 3 0 0 0.0 199 23 0 7 0.2 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 4 4 3 3 2 5 112 53 35 28 20 17 14 13 12 16 30 21 17 15 13 12 12 11 11 10 9 9 6 6 6 5 5 5 5 5 5 5 5 5 5 5 8 284 478 185 104 70 52 210 172 90 50 30 24 21 20 19 18 15 14 14 14 14 13 12 12 13 13 14 14 15 12 12 12 12 8 1 0 1 3 4 5 4 4 3 3 3 3 3 3 4 4 2 2 2 222 146 67 51 46 37 30 24 21 20 17 16 16 16 14 13 15 22 16 15 31 33 23 20 18 16 15 14 13 12 12 11 17 17 211 199 215 106 64 46 36 33 166 89 64 62 45 37 32 25 24 22 19 19 18 17 14 16 17 16 15 15 15 98 64 45 36 34 46 33 38 295 195 263 112 70 50 42 376 267 126 90 150 87 59 48 41 36 33 29 27 29 26 22 21 221 80 44 34 28 24 21 20 19 18 20 17 16 69 55 29 22 19 17 16 15 14 13 13 13 12 12 11 11 10 10 8 7 6 6 5 4 3 2 1 1 1 1 2 1 1 0 0 2 1 1 0 0 0 0 0 0 0 23 19 19 35 18 12 7 3 1 1 7 23 24 20 14 10 7 5 3 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 527 112 2 17 0.5 1936 478 5 62 1.9 226 15 0 8 0.2 964 222 2 31 0.9 1658 215 11 55 1.6 2749 376 14 89 2.7 1069 221 15 36 1.0 173 14 0 6 0.2 258 35 0 8 0.3 3 0 0 0 0.0 Appendix D-6. Continued Day Oct Nov A-78 Big Ditch (106), Water Year 1996 1 0 13 2 0 31 3 0 34 4 0 17 5 1 13 6 1 12 7 0 11 8 0 9 9 0 7 10 0 8 11 0 38 12 0 34 13 0 23 14 0 19 15 0 18 16 0 16 17 0 17 18 0 21 19 0 17 20 0 16 21 1 15 22 2 13 23 0 13 24 0 12 25 0 11 26 0 12 27 9 12 28 9 10 29 2 9 30 0 10 31 4 Total Max Min Avg Runoff 33 9 0 1 0.0 491 38 7 16 0.5 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 10 8 8 7 7 6 11 11 11 11 11 11 11 11 11 11 11 11 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 11 14 23 129 146 64 34 25 30 44 29 23 26 22 19 18 18 18 18 18 18 18 18 24 16 7 2 0 0 0 0 0 0 0 0 0 1 4 4 6 9 9 10 14 19 19 16 11 10 7 8 35 31 20 14 11 7 5 5 5 5 5 5 4 4 3 8 7 10 11 13 12 8 8 8 7 12 36 24 19 15 12 12 12 11 10 10 9 8 6 4 5 4 4 7 7 7 6 33 35 24 22 17 14 13 36 36 26 21 19 18 58 61 27 107 162 764 344 146 99 73 80 77 58 44 36 32 27 24 23 24 35 30 305 181 133 68 46 39 196 107 64 45 38 34 30 28 30 97 51 37 31 26 28 58 41 31 26 23 22 20 19 18 17 16 15 15 15 13 11 11 11 11 11 11 11 10 10 9 8 7 6 9 11 10 9 8 7 10 17 13 12 11 9 7 6 6 8 11 6 5 4 3 2 1 1 1 1 1 1 1 1 1 1 1 1 4 16 8 4 3 3 2 2 2 2 3 3 3 3 2 2 3 3 3 2 3 4 6 4 4 3 3 3 3 2 3 3 3 3 3 3 3 2 2 2 4 6 5 3 308 11 6 10 0.3 819 146 10 26 0.8 252 24 0 9 0.2 314 35 3 10 0.3 459 36 4 15 0.5 3147 764 18 102 3.1 1219 196 15 41 1.2 304 17 6 10 0.3 87 16 1 3 0.1 95 6 2 3 0.1 Appendix D-6. Continued Day Oct Nov A-79 Big Ditch (106), Water Year 1997 1 3 0 2 3 0 3 3 0 4 2 0 5 2 0 6 2 1 7 2 6 8 2 12 9 2 7 10 1 4 11 1 2 12 1 1 13 1 1 14 1 4 15 1 6 16 1 2 17 1 2 18 1 2 19 2 1 20 2 1 21 1 1 22 1 1 23 2 1 24 3 1 25 3 1 26 1 4 27 1 4 28 1 4 29 1 3 30 2 7 31 1 Total Max Min Avg Runoff 53 3 1 2 0.1 77 12 0 3 0.1 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 11 11 10 9 8 7 6 6 8 6 14 20 14 12 12 12 12 11 11 11 11 12 12 36 58 40 25 14 11 9 8 8 9 11 11 16 15 16 15 15 15 15 15 15 15 15 15 15 15 15 15 86 317 273 132 84 72 61 51 43 36 29 25 64 60 214 88 36 25 20 18 17 16 15 14 13 12 12 11 16 31 316 474 238 115 69 48 250 699 184 124 85 60 43 29 20 16 14 47 110 59 42 41 164 65 44 39 35 32 31 29 23 22 21 22 19 19 20 18 16 16 15 14 14 14 16 15 13 12 12 12 13 13 13 12 11 11 12 12 15 14 13 12 12 12 11 11 11 10 9 10 10 4 61 44 31 23 20 20 17 15 15 15 14 13 12 12 12 12 12 12 11 11 11 11 83 95 153 65 60 45 62 49 112 79 53 42 150 431 307 167 91 60 65 124 63 47 39 33 31 27 25 23 21 20 19 73 188 60 39 30 42 111 43 28 23 20 19 17 16 25 18 15 14 14 13 14 13 13 12 12 11 10 10 9 7 5 5 4 2 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 21 57 15 13 11 10 8 7 6 5 4 2 1 1 0 0 14 8 0 0 0 0 1 8 11 2 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 448 58 6 14 0.4 1466 317 8 47 1.4 3099 699 11 111 3.0 1324 164 14 43 1.3 374 16 9 12 0.4 981 153 4 32 1.0 2513 431 19 84 2.5 506 111 1 16 0.5 165 57 0 5 0.2 53 14 0 2 0.1 Appendix D-6. Continued Day Oct Nov A-80 Big Ditch (106), Water Year 1998 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 0 28 0 9 29 0 19 30 0 46 31 0 Total Max Min Avg Runoff 2 0 0 0 0.0 77 46 0 3 0.1 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 78 20 12 10 9 8 7 7 7 11 14 14 12 11 10 9 9 9 9 9 9 10 11 16 36 117 55 17 12 9 6 6 5 5 5 7 50 68 57 112 49 35 28 22 21 18 16 14 13 13 12 12 11 11 11 11 11 9 8 8 8 8 10 11 14 15 15 15 15 14 14 14 24 25 18 17 17 17 24 58 40 35 33 31 28 25 23 22 23 22 21 21 20 19 18 18 17 47 219 111 68 50 43 45 46 43 340 376 145 425 284 162 101 71 59 50 42 348 148 85 61 58 48 43 57 50 43 40 39 36 31 30 28 27 55 47 39 32 30 29 26 25 25 23 22 22 22 20 19 25 103 96 134 537 423 180 115 339 467 164 99 68 53 43 37 34 32 28 28 26 27 26 25 38 51 41 34 31 29 27 29 26 24 23 21 20 20 20 19 18 34 31 60 141 76 100 369 1315 604 258 419 165 104 104 338 108 70 54 44 38 104 92 51 41 35 32 28 82 106 54 38 39 32 26 23 21 19 18 16 16 14 13 13 14 56 24 17 14 13 12 11 11 10 9 7 9 146 34 27 21 43 22 18 15 12 11 10 8 9 8 7 6 6 5 4 4 4 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 3 3 2 1 1 2 1 1 1 1 571 117 6 18 0.6 662 112 5 21 0.6 623 58 10 22 0.6 3506 425 17 113 3.4 1095 103 19 37 1.1 3289 537 25 106 3.2 4793 1315 18 160 4.7 898 106 10 29 0.9 461 146 2 15 0.5 41 3 1 1 0.0 Appendix D-6. Continued Day Oct Nov A-81 Big Ditch (106), Water Year 1999 1 1 4 2 1 3 3 1 3 4 1 3 5 1 3 6 2 3 7 2 2 8 2 2 9 2 2 10 1 4 11 1 7 12 1 4 13 1 3 14 1 3 15 1 3 16 1 3 17 1 2 18 1 2 19 1 2 20 2 2 21 2 2 22 2 2 23 2 2 24 2 2 25 2 2 26 2 2 27 2 2 28 2 2 29 3 2 30 3 2 31 5 Total Max Min Avg Runoff 56 5 1 2 0.1 75 7 2 2 0.1 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 2 1 1 1 1 1 2 2 2 2 2 2 2 2 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 5 9 12 15 19 25 32 43 56 135 1183 870 318 178 119 110 83 58 47 53 104 83 65 46 38 35 199 187 107 73 66 117 59 46 42 39 39 35 33 29 26 24 24 21 21 21 21 22 21 22 73 44 38 43 38 35 34 27 26 26 27 27 27 34 38 31 26 26 25 23 22 22 19 18 18 18 18 17 16 17 17 17 18 16 17 16 16 18 15 30 23 20 19 79 438 355 170 114 80 69 58 48 40 38 36 34 31 26 24 16 16 16 15 15 15 14 13 12 11 11 11 17 20 20 20 22 34 26 22 20 18 17 17 15 14 13 12 12 12 12 20 100 43 39 88 45 31 25 21 19 18 17 17 17 15 14 13 12 12 11 10 9 9 9 9 8 8 8 7 6 6 6 5 5 4 3 3 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 2 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 42 2 1 1 0.0 3392 1183 1 109 3.3 1623 199 21 58 1.6 880 73 16 28 0.9 1897 438 15 63 1.9 507 34 11 16 0.5 658 100 6 22 0.6 65 6 1 2 0.1 36 2 1 1 0.0 23 3 1 1 0.0 Appendix D-6. Continued Day Oct Nov A-82 Big Ditch (106), Water Year 2000 1 3 1 2 2 1 3 2 1 4 2 1 5 3 1 6 3 1 7 2 1 8 2 1 9 2 1 10 2 1 11 3 1 12 2 1 13 2 1 14 1 1 15 1 1 16 1 1 17 1 1 18 1 1 19 1 1 20 1 1 21 1 1 22 1 1 23 1 1 24 1 1 25 1 1 26 1 1 27 1 1 28 1 1 29 1 1 30 1 0 31 1 Total Max Min Avg Runoff 48 3 1 2 0.0 19 1 0 1 0.0 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 0 0 0 0 1 2 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 2 2 2 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 6 5 4 3 2 1 2 2 13 41 11 8 10 10 7 6 5 5 6 5 5 4 4 4 3 3 2 2 2 2 2 2 2 2 2 2 2 1 2 25 18 11 9 9 8 7 7 7 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 3 4 4 4 12 10 8 10 11 8 9 9 9 7 8 8 7 6 7 7 7 6 6 6 7 8 17 40 24 22 20 18 15 16 16 16 15 14 14 16 18 18 17 16 113 147 96 74 61 52 45 38 36 35 30 25 23 21 19 16 34 80 47 29 20 14 10 8 14 104 136 82 170 127 81 52 37 29 22 17 15 13 11 12 13 8 7 6 6 6 5 5 4 4 4 4 3 3 3 3 2 2 2 2 2 1 1 2 4 3 2 2 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 2 1 3 2 1 2 3 3 4 3 3 2 2 2 1 1 1 1 0 0 1 1 1 2 3 3 4 4 3 2 2 2 2 2 2 2 2 3 3 4 5 4 3 3 22 2 0 1 0.0 19 2 0 1 0.0 157 41 0 5 0.2 162 25 1 5 0.2 186 12 3 6 0.2 879 147 6 28 0.9 1435 170 8 48 1.4 172 17 1 6 0.2 46 4 0 1 0.0 65 5 0 2 0.1 Appendix D-6. Continued Day Oct Nov A-83 Big Ditch (106), Water Year 2001 1 3 3 2 3 3 3 2 1 4 3 0 5 4 0 6 6 0 7 6 0 8 4 1 9 4 17 10 4 69 11 4 31 12 3 21 13 3 23 14 3 23 15 4 18 16 4 17 17 4 14 18 4 12 19 4 12 20 4 10 21 4 10 22 4 9 23 4 8 24 4 8 25 3 9 26 4 14 27 3 13 28 3 11 29 3 11 30 3 10 31 3 Total Max Min Avg Runoff 111 6 2 4 0.1 377 69 0 13 0.4 Dec Jan Feb Mar Apr May Jun 10 9 10 10 13 14 14 9 8 8 16 42 19 18 18 16 15 14 14 14 14 14 15 15 15 15 14 14 14 14 13 13 13 13 12 12 12 11 11 11 11 10 10 10 10 9 73 40 23 18 15 11 8 6 5 6 6 6 6 64 404 139 82 53 53 25 29 23 28 61 171 129 62 42 34 112 117 78 51 36 31 25 22 22 19 324 798 195 137 100 71 54 45 39 31 27 25 23 21 20 19 19 19 17 17 25 32 34 30 27 24 22 21 19 18 18 17 17 17 16 16 15 14 14 12 13 16 15 13 13 15 38 31 22 20 19 17 15 15 15 15 14 13 14 11 11 11 11 9 9 10 5 4 3 3 4 3 3 3 3 3 4 3 3 3 4 4 4 37 36 23 19 13 11 10 9 11 21 14 11 9 10 12 15 13 35 54 106 95 58 45 38 35 31 28 25 23 19 17 15 15 14 13 12 11 10 10 9 8 8 8 7 447 42 8 14 0.4 996 404 5 32 1.0 2855 798 19 102 2.8 799 71 16 26 0.8 459 38 9 15 0.5 293 37 3 9 0.3 788 106 7 26 0.8 Jul 7 6 7 7 7 7 7 6 7 6 6 5 4 3 3 3 2 2 2 2 2 2 1 2 1 1 1 1 2 3 2 116 7 1 4 0.1 Aug Sept 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 2 1 1 1 1 3 3 2 1 1 1 1 1 2 5 5 2 2 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 30 3 1 1 0.0 50 5 1 2 0.0 Appendix D-6. Continued Day Oct Nov A-84 Big Ditch (106), Water Year 2002 1 1 7 2 1 6 3 1 6 4 1 5 5 2 5 6 2 4 7 3 4 8 2 4 9 1 4 10 1 3 11 1 4 12 2 3 13 6 3 14 40 3 15 33 3 16 31 3 17 35 2 18 16 2 19 9 2 20 6 2 21 5 2 22 4 3 23 4 2 24 13 2 25 78 3 26 38 2 27 20 2 28 13 2 29 10 3 30 8 31 31 7 Total Max Min Avg Runoff 394 78 1 13 0.4 129 31 2 4 0.1 Dec Jan Feb Mar Apr May Jun Jul Aug Sept 28 14 11 9 8 7 7 6 5 5 5 5 9 18 37 28 78 84 55 40 34 33 34 29 23 17 20 18 14 13 12 11 12 13 13 11 9 12 14 10 7 5 6 6 6 4 4 5 6 5 5 4 3 4 4 3 3 4 4 4 19 353 328 137 97 73 56 47 41 36 35 36 38 38 31 30 30 26 20 19 217 463 189 113 85 70 58 53 48 43 38 62 118 70 54 68 76 65 129 92 65 57 53 48 43 38 38 35 34 34 31 29 30 29 26 26 27 53 114 112 79 63 56 46 41 39 37 37 49 62 50 46 43 38 37 36 33 32 33 33 31 64 67 52 49 46 42 161 338 150 104 83 70 57 52 48 51 49 48 72 65 119 580 326 172 115 95 105 108 88 72 64 60 56 53 51 48 47 57 74 59 54 52 51 50 49 78 85 70 64 62 64 170 183 353 190 117 91 74 64 57 52 49 47 46 43 41 75 73 54 38 32 27 22 18 15 12 10 8 7 6 6 6 4 4 3 3 3 3 3 3 3 3 3 3 2 3 2 2 3 3 3 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 8 2 2 126 66 30 13 7 4 3 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 2 2 3 3 4 4 4 3 3 2 2 2 2 2 2 706 84 5 23 0.7 571 353 3 18 0.6 2457 463 19 88 2.4 1774 129 26 57 1.7 1914 338 31 64 1.9 2997 580 47 97 2.9 2477 353 32 83 2.4 192 27 2 6 0.2 282 126 1 9 0.3 58 4 1 2 0.1 Appendix D-6. Concluded Day Oct Nov A-85 Big Ditch (106), Water Year 2003 1 2 1 2 2 1 3 2 1 4 2 1 5 2 1 6 2 1 7 2 1 8 1 1 9 1 1 10 1 1 11 1 1 12 1 1 13 1 0 14 1 0 15 1 1 16 1 1 17 1 1 18 1 1 19 1 1 20 1 1 21 1 0 22 1 1 23 1 1 24 1 1 25 1 0 26 1 0 27 1 0 28 1 0 29 1 0 30 1 0 31 2 Total Max Min Avg Runoff 37 2 1 1 0.0 19 1 0 1 0.0 Dec Jan Feb Mar Apr May Jun Jul 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 8 3 2 1 2 2 2 2 2 2 2 6 9 3 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 3 3 4 5 5 6 7 7 7 8 8 8 7 6 6 5 4 4 3 3 2 2 2 2 1 1 1 1 1 1 2 3 4 5 7 8 7 6 5 4 3 2 2 3 6 9 13 12 9 6 4 3 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 8 40 12 39 31 18 12 9 7 5 5 4 4 4 3 3 6 5 3 3 3 7 7 5 5 5 4 5 4 3 16 149 68 46 35 101 194 136 76 55 46 40 34 32 29 26 22 19 19 18 18 17 15 14 15 16 15 15 11 11 14 13 12 12 14 14 13 13 136 245 127 118 76 60 51 46 42 38 36 35 34 33 32 31 30 29 28 24 21 18 16 13 10 120 71 39 End of data 54 9 0 2 0.1 95 8 1 3 0.1 100 13 1 3 0.1 259 40 1 9 0.3 1296 194 3 42 1.3 1376 245 11 46 1.4 107 8 1 4 0.1 Aug Sept Appendix D-7. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Sangamon River near Monticello (Station 111) Day Oct Nov Dec Jan A-86 Sangamon River near Monticello (111), Water Year 1993 1 75 554 738 1430 2 68 2180 662 1440 3 62 2580 592 1180 4 59 2470 538 2890 5 57 2470 483 5340 6 54 2320 451 6110 7 52 2000 431 5650 8 52 1510 409 3490 9 53 1010 388 2280 10 53 966 384 1690 11 45 1680 371 1150 12 45 2480 351 853 13 45 3370 316 826 14 46 3210 302 813 15 55 3010 376 700 16 105 2630 971 620 17 155 2100 1380 540 18 163 1480 1480 490 19 127 1040 1440 440 20 114 851 1070 392 21 102 785 799 1220 22 85 984 674 2090 23 77 1690 595 2560 24 73 1870 514 3310 25 73 1970 468 3400 26 74 2010 366 2750 27 73 1780 330 2170 28 69 1440 360 1690 29 67 1100 416 1260 30 65 860 573 957 31 60 1140 806 Total Max Min Avg Runoff 2303 163 45 74 0.2 54400 3370 554 1813 3.8 19368 1480 302 625 1.3 60537 6110 392 1953 4.2 Feb Mar Apr May Jun Jul Aug Sept 713 626 557 510 476 450 433 419 402 390 378 440 545 606 562 524 474 395 403 380 385 423 361 320 302 300 310 320 330 346 531 1630 2430 3360 3750 3420 2920 2450 2070 1780 1500 1160 892 795 820 818 766 731 738 786 1670 2060 2260 2330 1920 1400 1030 841 792 927 1330 1650 1920 1690 1160 841 743 724 739 690 620 575 1730 2270 2510 2560 2360 1930 2130 2220 1950 1570 1200 2350 2860 2730 2410 1780 1270 1050 969 868 856 963 1240 1380 1100 817 699 620 578 550 530 500 460 435 416 398 381 361 338 341 361 357 321 293 281 268 273 403 472 492 461 685 1490 1710 1710 1470 934 770 871 838 690 585 506 453 412 552 633 747 930 1020 866 598 494 437 396 378 833 1440 2340 3860 5010 5510 4350 3100 2050 1100 738 591 522 555 551 730 875 796 901 751 747 702 576 477 446 900 1610 1840 2280 2430 1560 709 523 448 384 337 298 266 244 224 205 187 183 183 309 604 500 363 292 316 277 259 864 1070 915 596 477 394 335 289 249 236 217 192 192 206 667 1320 1670 2050 2010 1620 1700 1720 917 520 456 558 1520 1890 1820 1450 900 670 573 510 554 514 505 782 1530 1760 1720 1630 12404 713 300 443 0.9 48326 3750 330 1559 3.3 49439 2860 575 1648 3.4 18407 1380 268 594 1.3 23873 1710 378 796 1.6 49130 5510 446 1585 3.4 11713 1070 183 378 0.8 33934 2050 192 1131 2.3 Appendix D-7. Continued Day Oct Nov Dec Jan A-87 Sangamon River near Monticello (111), Water Year 1994 1 1200 520 1010 300 2 799 484 1260 270 3 651 463 1990 250 4 571 449 2140 230 5 516 438 2200 210 6 469 412 2110 200 7 433 382 1810 180 8 416 360 1320 170 9 932 344 1000 175 10 1690 332 866 190 11 1710 323 769 180 12 1640 320 687 170 13 1290 333 632 165 14 830 556 638 160 15 659 1280 713 150 16 793 1570 829 150 17 1710 1590 797 150 18 2440 1960 726 150 19 4450 2130 716 150 20 4530 2290 716 150 21 3640 2110 681 155 22 2770 1450 635 160 23 2320 978 568 170 24 2030 811 514 214 25 1660 745 491 383 26 1240 1120 446 941 27 951 1840 392 963 28 800 2010 350 1930 29 704 1980 330 2220 30 630 1510 320 1790 31 568 330 1200 Total Max Min Avg Runoff 45042 4530 416 1453 3.1 31090 2290 320 1036 2.1 27986 2200 320 903 1.9 13876 2220 150 448 1.0 Feb Mar Apr May Jun Jul 556 403 321 279 232 210 190 180 165 155 145 138 133 133 171 361 629 604 626 741 811 725 539 397 316 219 190 180 170 160 180 268 667 1090 1520 1990 2070 1780 1150 809 701 643 598 520 451 417 372 340 319 305 287 273 255 244 267 303 325 293 266 254 245 258 265 282 281 271 298 336 587 1090 5990 12500 14000 8000 3730 2590 2120 1710 1400 1020 858 748 665 600 555 1720 1760 1800 1570 1720 1590 1360 1020 837 765 1460 1970 1710 1380 996 868 757 665 619 566 505 459 422 396 380 355 337 323 376 372 333 300 278 263 252 241 230 219 208 202 199 193 202 239 232 213 205 208 192 176 165 156 147 141 137 132 132 128 131 130 123 116 104 96 88 81 84 79 71 69 68 137 462 287 180 133 106 87 81 72 61 60 55 51 48 60 61 51 49 42 38 33 31 28 25 23 9749 811 133 348 0.7 19033 2070 160 614 1.3 67503 14000 245 2250 4.7 23634 1970 252 762 1.6 5085 241 88 170 0.4 2713 462 23 88 0.2 Aug Sept 24 24 23 31 51 46 39 33 39 40 46 32 26 23 55 75 57 40 31 28 24 23 21 22 21 20 17 18 19 24 56 41 23 18 17 22 20 21 19 17 18 17 15 14 14 13 12 10 9 10 10 10 10 13 11 11 16 24 28 23 17 1028 75 17 33 0.1 502 41 9 17 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-88 Sangamon River near Monticello (111), Water Year 1995 1 14 19 218 163 2 12 18 176 146 3 13 20 153 127 4 13 39 139 107 5 12 55 129 103 6 11 108 124 101 7 12 224 236 103 8 19 268 742 107 9 15 205 995 123 10 15 187 991 109 11 16 171 734 111 12 27 160 543 140 13 25 144 417 406 14 19 138 341 1500 15 15 137 294 2270 16 14 138 276 2500 17 14 140 348 2550 18 14 124 437 2270 19 13 108 442 1790 20 12 100 378 1940 21 13 124 327 2110 22 12 151 291 2240 23 9 174 264 2050 24 11 163 244 1110 25 11 140 228 662 26 11 122 212 537 27 11 122 199 490 28 10 152 192 450 29 10 210 184 405 30 11 283 174 357 31 19 164 335 Total Max Min Avg Runoff 433 27 9 14 0.0 4144 283 18 138 0.3 10592 995 124 342 0.7 27412 2550 101 884 1.9 Feb Mar Apr May Jun Jul Aug Sept 339 338 325 306 272 216 200 190 180 175 170 167 162 161 160 160 161 162 163 166 166 156 154 147 141 141 142 142 124 114 112 110 125 134 575 1580 1780 1800 1520 1040 830 701 596 522 464 415 385 377 356 332 314 331 352 325 331 406 474 408 359 326 303 287 270 251 237 231 233 257 316 724 992 1240 1320 1090 730 622 849 1360 1430 1410 1150 908 758 657 572 524 476 437 420 405 388 364 340 320 304 290 296 844 1410 1700 1830 2370 2760 2090 1910 5640 5080 4850 3660 3330 2980 2330 2940 3520 3570 4540 4040 2970 2240 1880 1410 1030 874 766 684 622 608 569 503 846 1550 1530 1150 734 585 501 444 406 378 359 421 395 373 635 827 637 479 396 426 517 472 360 306 278 263 247 222 200 185 175 166 159 148 140 131 120 109 102 93 86 84 81 83 78 75 70 68 67 64 65 59 53 53 53 57 85 155 265 391 493 476 492 328 199 139 103 80 73 66 140 221 186 175 117 84 66 53 46 41 38 34 30 28 24 22 21 20 19 24 21 18 19 19 19 18 16 13 13 12 12 12 12 13 13 11 10 11 11 12 14 12 10 5362 339 141 192 0.4 17292 1800 110 558 1.2 20380 1430 231 679 1.4 71191 5640 290 2296 4.9 20655 1550 359 689 1.4 4756 472 59 153 0.3 4792 493 30 155 0.3 479 28 10 16 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-89 Sangamon River near Monticello (111), Water Year 1996 1 10 36 82 55 2 10 65 79 60 3 12 174 81 56 4 10 338 76 52 5 10 272 73 47 6 14 186 68 45 7 11 146 62 42 8 11 121 60 40 9 10 107 45 39 10 10 93 42 37 11 12 99 41 36 12 11 212 40 36 13 10 474 42 38 14 24 391 47 40 15 23 295 52 44 16 19 243 58 48 17 14 215 63 60 18 11 198 65 244 19 8 221 63 849 20 14 237 53 1040 21 18 212 49 953 22 14 187 47 717 23 11 163 45 556 24 10 145 44 479 25 16 129 44 560 26 19 113 46 390 27 25 109 47 325 28 21 109 48 290 29 22 109 50 226 30 42 97 52 190 31 41 54 160 Total Max Min Avg Runoff 492 42 8 16 0.0 5496 474 36 183 0.4 1718 82 40 55 0.1 7754 1040 36 250 0.5 Feb Mar Apr May Jun Jul Aug Sept 140 120 100 90 83 85 95 100 120 130 154 138 120 107 97 92 88 85 84 93 100 95 90 89 93 99 114 138 166 157 136 119 95 120 177 201 160 140 191 166 144 133 126 121 116 116 120 122 124 118 115 121 126 142 149 147 129 124 121 142 314 472 483 402 321 258 223 205 188 171 159 157 153 144 138 133 126 120 123 143 150 253 429 579 487 400 326 280 607 739 690 564 464 644 604 583 713 994 1740 2280 3780 5370 4540 2820 2090 1680 1500 1390 1120 887 758 672 615 606 774 863 1930 2340 2010 2190 2100 1600 1790 1960 1920 1950 1680 1140 882 801 887 967 1090 945 797 692 607 599 638 868 917 635 508 470 466 409 346 307 282 262 244 227 212 195 179 165 153 143 136 127 117 107 98 92 90 89 85 84 75 67 65 55 150 500 286 231 167 136 109 93 90 88 154 140 99 80 70 62 56 51 46 41 38 35 33 32 31 29 30 40 95 128 87 60 64 65 38 33 143 54 37 30 26 24 22 20 21 20 20 19 24 25 23 21 19 18 17 16 17 17 16 16 16 15 16 16 15 15 21 22 21 21 29 3105 166 83 107 0.2 4218 201 95 136 0.3 8683 739 120 289 0.6 49311 5370 464 1591 3.4 26659 1960 244 889 1.8 4411 500 55 142 0.3 1901 154 29 63 0.1 608 29 15 20 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-90 Sangamon River near Monticello (111), Water Year 1997 1 26 9 96 102 2 23 8 119 103 3 20 8 123 108 4 18 8 104 128 5 16 9 94 172 6 14 13 88 190 7 14 28 110 207 8 14 56 80 156 9 13 55 68 142 10 11 61 60 130 11 10 46 63 120 12 7 33 68 105 13 6 24 140 95 14 6 19 204 88 15 6 16 168 82 16 4 13 145 77 17 4 15 133 72 18 4 15 115 69 19 8 15 80 66 20 6 14 84 64 21 6 14 87 70 22 8 13 86 291 23 7 12 90 755 24 6 14 96 1030 25 7 16 126 992 26 7 21 178 875 27 7 21 211 616 28 11 21 170 443 29 11 27 140 350 30 11 59 120 285 31 10 108 277 Total Max Min Avg Runoff 318 26 4 10 0.0 682 61 8 23 0.0 3554 211 60 115 0.2 8260 1030 64 266 0.6 Feb Mar Apr May Jun Jul Aug Sept 299 396 663 1020 1380 1320 1120 737 495 403 340 300 250 230 210 200 194 211 289 632 1710 2320 2540 2530 2060 1690 2830 3250 3740 2990 2200 1760 1380 1070 870 769 906 1580 1600 1430 1130 1400 1590 1400 1060 861 770 714 666 599 515 450 434 410 389 372 371 356 335 311 294 286 287 299 302 281 266 240 227 232 247 252 272 258 237 227 219 221 229 256 242 223 207 191 177 172 174 176 175 203 186 424 777 820 622 454 379 330 293 264 250 239 228 208 189 180 174 180 173 159 142 132 131 147 447 1080 1410 1880 2130 1810 1180 927 1050 1170 1080 868 846 1280 1750 1510 1170 1020 1470 1440 1320 1040 771 649 570 510 460 421 386 350 347 575 676 460 361 327 321 460 353 275 235 210 195 177 167 312 340 197 156 137 129 120 116 102 96 90 87 103 85 82 78 72 65 59 55 51 48 44 41 39 39 39 37 36 36 36 33 34 34 34 34 37 36 134 614 725 459 237 170 128 106 97 91 77 67 60 54 51 47 71 101 72 54 46 40 83 176 155 158 140 99 75 62 53 49 43 40 43 50 45 42 38 33 29 26 23 22 22 29619 3250 194 1058 2.0 34117 3740 335 1101 2.4 7180 311 172 239 0.5 16041 2130 131 517 1.1 25984 1750 327 866 1.8 4973 460 48 160 0.3 3659 725 33 118 0.3 1937 176 22 65 0.1 Appendix D-7. Continued Day Oct Nov Dec Jan A-91 Sangamon River near Monticello (111), Water Year 1998 1 21 24 441 155 2 19 24 337 174 3 16 26 264 165 4 15 25 215 161 5 14 24 173 187 6 15 27 143 455 7 19 26 124 671 8 18 33 113 1140 9 18 34 108 2020 10 16 34 116 2110 11 16 33 142 1980 12 17 31 161 1630 13 20 29 163 901 14 20 29 148 635 15 19 29 131 534 16 19 27 122 479 17 18 28 119 422 18 17 28 109 373 19 19 29 102 332 20 19 31 95 300 21 20 32 89 283 22 19 30 99 269 23 16 30 111 261 24 16 31 132 244 25 17 30 301 230 26 22 33 348 221 27 23 32 377 215 28 23 43 328 251 29 24 96 276 288 30 27 237 238 316 31 26 196 328 Total Max Min Avg Runoff 588 27 14 19 0.0 1165 237 24 39 0.1 5821 441 89 188 0.4 17730 2110 155 572 1.2 Feb Mar Apr May Jun Jul Aug Sept 324 316 299 286 277 263 246 229 217 208 239 351 403 440 395 365 385 562 695 734 689 622 560 502 452 419 430 436 460 447 422 392 359 331 309 420 1020 1700 1960 1950 1560 1020 885 843 1050 2580 3230 4560 5130 4370 3650 3110 2530 1940 1360 2080 2800 2520 2100 1760 1370 1150 1280 1320 1210 1030 931 1020 1280 1400 1000 776 767 881 926 775 650 574 532 517 507 483 448 425 410 380 350 369 729 1180 1780 3610 4470 3290 3080 3350 4110 3710 4330 3660 2690 1950 1130 824 710 626 559 519 511 478 494 836 1910 1670 1020 767 626 543 495 476 430 395 359 341 335 310 288 275 369 525 670 1410 1910 2030 4080 3830 4320 5840 6160 4520 3250 2460 2360 2390 2490 2210 1330 817 700 959 1290 1270 927 670 587 570 686 910 751 593 495 422 367 325 292 262 234 210 190 174 158 149 159 257 218 158 130 113 102 95 87 79 71 67 84 268 195 138 114 131 108 88 76 66 59 53 50 50 51 46 42 39 38 35 34 32 30 29 28 26 24 24 24 23 22 21 19 19 18 19 18 17 17 17 16 16 16 15 14 14 12 13 16 15 14 19 18 15 12 13 12 12 11344 734 208 405 0.8 57088 5130 309 1842 3.9 25250 1760 350 842 1.7 55404 4470 476 1787 3.8 57363 6160 275 1912 4.0 12851 1290 87 415 0.9 2175 268 24 70 0.2 496 24 12 17 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-92 Sangamon River near Monticello (111), Water Year 1999 1 12 16 11 8 2 12 26 11 10 3 10 29 11 9 4 9 28 11 8 5 11 24 11 8 6 13 21 11 9 7 12 18 12 10 8 13 18 11 9 9 12 19 9 9 10 17 22 9 8 11 14 19 10 8 12 13 21 9 8 13 12 22 9 7 14 11 32 9 7 15 11 29 8 7 16 10 26 8 7 17 9 23 8 9 18 10 20 8 15 19 11 18 9 23 20 11 16 8 26 21 11 15 10 38 22 11 15 9 175 23 11 14 9 902 24 12 13 9 2030 25 12 12 8 2890 26 15 10 7 2410 27 14 10 7 1980 28 14 9 6 1310 29 14 9 6 891 30 14 11 5 674 31 13 6 528 Total Max Min Avg Runoff 373 17 9 12 0.0 565 32 9 19 0.0 273 12 5 9 0.0 14031 2890 7 453 1.0 Feb Mar Apr May Jun Jul Aug Sept 573 751 822 784 613 471 671 1500 1850 1860 1710 1370 1100 824 635 552 510 484 446 395 347 311 293 279 270 253 251 259 293 314 442 625 613 554 559 553 519 459 397 359 386 413 417 428 471 486 447 377 340 315 291 268 247 228 213 206 202 193 187 189 188 189 192 184 197 190 192 272 322 406 411 370 312 439 1330 2270 3190 3410 2760 2200 1590 1120 859 730 647 611 686 633 538 480 436 409 384 375 359 353 316 282 261 247 240 300 444 587 565 489 472 455 402 359 448 413 367 330 299 268 245 229 218 214 235 531 909 1120 1560 1310 971 700 543 455 405 364 558 876 967 1080 1030 628 451 378 334 300 301 485 802 838 771 684 559 433 374 349 446 377 288 239 206 181 161 144 128 115 103 94 86 77 74 69 64 67 78 61 52 47 43 39 48 44 51 48 39 34 31 28 26 25 24 25 40 29 23 22 36 418 148 69 52 39 32 29 26 25 23 23 24 25 41 32 40 32 26 22 19 18 17 16 15 14 15 14 14 13 13 13 13 13 12 11 11 9 9 10 10 10 9 9 9 8 9 15 13 13 20184 1860 251 721 1.4 11802 625 187 381 0.8 26627 3410 184 888 1.8 11246 587 214 363 0.8 20578 1560 235 686 1.4 4192 446 39 135 0.3 1469 418 22 47 0.1 373 19 8 12 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-93 Sangamon River near Monticello (111), Water Year 2000 1 13 5 6 11 2 10 5 6 12 3 14 5 6 19 4 16 4 5 19 5 15 5 11 21 6 14 5 23 20 7 13 6 25 19 8 22 6 28 17 9 20 6 27 18 10 18 6 22 17 11 17 6 17 16 12 15 6 15 15 13 13 6 14 14 14 12 5 16 13 15 10 6 18 12 16 9 7 18 11 17 8 7 18 11 18 9 6 18 11 19 8 6 18 11 20 7 6 18 11 21 7 6 15 11 22 6 5 15 10 23 6 7 13 10 24 5 6 12 10 25 5 6 11 8 26 5 6 10 8 27 5 5 10 7 28 5 5 10 7 29 5 6 11 6 30 4 6 12 6 31 4 12 6 Total Max Min Avg Runoff 318 22 4 10 0.0 168 7 4 6 0.0 460 28 5 15 0.0 385 21 6 12 0.0 Feb Mar Apr May Jun Jul Aug Sept 7 7 7 8 9 10 10 10 11 15 28 35 45 46 45 44 37 126 367 351 301 241 212 196 176 159 152 144 140 138 124 113 107 98 91 85 81 80 79 72 67 68 66 66 62 58 52 63 145 261 306 262 217 189 165 162 150 134 119 108 98 94 94 92 85 84 80 77 69 67 77 80 71 70 69 69 94 140 143 143 161 218 293 292 321 280 254 222 193 171 160 155 141 142 133 123 118 115 119 157 170 179 288 236 181 153 139 134 147 138 224 214 188 165 146 133 356 1160 1610 1200 758 542 422 343 308 375 326 270 235 206 187 180 184 491 469 429 314 243 202 176 179 625 821 1010 1510 1380 1060 761 547 426 346 292 252 222 200 244 244 272 219 175 154 157 150 133 113 99 86 75 66 61 54 49 43 38 33 30 27 25 23 20 25 43 28 23 22 24 22 19 18 17 16 15 14 12 11 12 12 11 11 13 13 11 11 16 30 220 79 43 33 23 20 18 15 12 10 9 8 8 7 7 7 6 13 24 24 23 27 26 21 15 12 11 10 8 8 8 10 17 19 30 29 22 17 2939 367 7 101 0.2 3788 306 52 122 0.3 4201 321 67 140 0.3 9282 1610 115 299 0.6 14567 1510 176 486 1.0 3624 292 20 117 0.3 832 220 11 27 0.1 446 30 6 15 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-94 Sangamon River near Monticello (111), Water Year 2001 1 14 23 108 60 2 13 22 103 59 3 11 22 98 63 4 14 21 96 70 5 29 20 95 81 6 59 30 72 70 7 87 46 100 58 8 74 63 93 52 9 60 92 79 48 10 51 336 97 48 11 43 490 105 49 12 36 436 120 50 13 31 350 150 53 14 26 320 170 61 15 35 286 195 104 16 46 252 180 149 17 48 213 160 170 18 48 177 140 150 19 44 156 130 135 20 42 139 120 120 21 38 120 110 110 22 35 97 100 98 23 33 103 88 92 24 30 104 88 86 25 28 100 81 80 26 26 108 80 77 27 24 120 75 75 28 21 124 70 74 29 19 122 65 142 30 21 115 63 1540 31 26 61 2360 Total Max Min Avg Runoff 1112 87 11 36 0.1 4607 490 20 154 0.3 3292 195 61 106 0.2 6384 2360 48 206 0.4 Feb Mar Apr May Jun Jul 2180 2100 2070 1760 1040 702 671 731 1330 2110 2500 2950 2400 1610 1960 2040 1890 1410 899 715 593 508 452 896 4670 5380 5950 4330 2860 2120 1490 1110 917 790 683 606 543 486 449 425 418 394 378 419 548 732 831 782 696 609 534 474 425 388 358 343 330 320 310 299 284 268 250 242 246 253 565 546 364 337 464 734 581 448 397 367 327 296 286 279 266 254 236 225 211 203 195 183 173 55847 5950 452 1995 3.9 21768 2860 310 702 1.5 9779 734 173 326 0.7 Aug Sept 170 169 167 164 162 154 174 177 161 149 148 142 130 125 122 120 121 135 166 292 276 228 197 175 161 178 184 291 376 288 233 210 209 227 344 449 707 1010 1230 1310 981 676 548 463 398 352 317 281 248 225 206 204 214 226 220 186 161 141 130 119 112 103 93 107 107 116 121 105 84 91 72 64 58 51 44 39 35 36 33 30 28 25 25 29 27 23 20 20 19 19 18 17 17 20 17 14 12 12 12 11 11 11 10 9 9 8 8 8 8 9 7 9 10 11 21 13 12 10 13 13 11 13 16 38 21 61 34 20 14 25 10 15 17 20 11 10 9 6 5 5 6 5 5 5 5 5 6 5 4 4 4 3 3 5735 376 120 185 0.4 12104 1310 112 403 0.8 1659 121 17 54 0.1 365 21 7 12 0.0 378 61 3 13 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-95 Sangamon River near Monticello (111), Water Year 2002 1 3 328 283 230 2 3 304 524 210 3 3 287 550 220 4 3 268 445 211 5 7 243 381 206 6 4 220 342 202 7 4 208 313 195 8 5 199 291 182 9 5 192 269 180 10 9 184 250 176 11 9 176 233 181 12 14 166 221 162 13 22 160 230 140 14 22 154 261 156 15 72 144 343 144 16 236 139 456 131 17 228 137 670 117 18 207 134 1020 90 19 205 135 1370 109 20 152 125 1190 108 21 115 122 865 121 22 92 117 670 113 23 85 113 550 109 24 127 118 470 110 25 432 116 400 102 26 963 114 360 96 27 1360 110 400 91 28 1080 115 450 89 29 647 126 350 92 30 492 170 280 118 31 410 250 852 Total Max Min Avg Runoff 7016 1360 3 226 0.5 5124 328 110 171 0.4 14687 1370 221 474 1.0 5243 852 89 169 0.4 Feb Mar Apr May Jun Jul Aug Sept 2440 2970 3250 3030 2420 1700 1150 930 803 738 712 728 712 650 591 554 513 459 737 2430 3220 3240 2980 2510 1930 1480 1170 1010 897 894 1510 2010 2050 1780 1540 1680 1980 2320 2450 2460 2120 1600 1270 1070 934 851 794 753 710 649 602 590 613 594 561 655 1330 2040 1980 1720 1320 1000 816 703 632 587 625 806 883 885 803 726 665 623 582 536 496 471 454 551 863 912 842 784 706 828 2030 2410 2470 2520 2170 1580 1120 897 836 1050 1170 1500 1760 1820 2930 4069 4860 5120 3750 2970 2370 1980 1760 1530 1240 1040 918 844 785 717 686 777 735 654 593 552 515 483 526 653 747 701 601 574 722 1560 1660 2070 2250 2039 1650 1090 794 669 584 519 477 443 418 402 501 498 496 363 306 270 243 219 198 175 155 140 127 114 106 102 88 78 70 64 57 51 46 42 43 49 42 39 41 50 54 43 60 56 56 66 59 44 33 28 24 20 18 16 14 13 12 12 14 13 21 31 26 30 75 152 206 850 2000 2100 1960 1440 625 367 257 190 148 120 100 83 71 63 55 48 45 45 40 36 33 29 27 27 28 35 31 33 32 31 30 28 25 22 20 18 16 16 45057 3250 459 1609 3.1 41287 2460 561 1332 2.8 27729 2470 454 924 1.9 56158 5120 654 1812 3.9 25150 2250 363 838 1.7 3184 306 39 103 0.2 10716 2100 12 346 0.7 1335 148 16 45 0.1 Appendix D-7. Continued Day Oct Nov Dec Jan A-96 Sangamon River near Monticello (111), Water Year 2003 1 16 15 21 107 2 15 13 22 127 3 16 13 22 130 4 19 15 21 95 5 16 20 21 107 6 15 19 21 89 7 15 21 18 83 8 14 22 19 82 9 15 21 19 83 10 16 19 19 79 11 15 23 20 54 12 14 28 20 62 13 13 23 20 60 14 15 21 19 56 15 12 20 19 52 16 12 21 21 49 17 11 23 21 46 18 16 24 37 44 19 25 23 62 41 20 18 24 92 38 21 19 24 115 36 22 17 26 114 34 23 17 25 93 32 24 19 25 76 31 25 25 25 63 30 26 22 24 67 30 27 21 24 53 31 28 19 22 54 32 29 24 22 53 33 30 21 22 58 35 31 23 89 38 Total Max Min Avg Runoff 535 25 11 17 0.0 647 28 13 22 0.0 1369 115 18 44 0.1 1846 130 30 60 0.1 Feb Mar Apr May Jun Jul Aug Sept 41 45 50 60 72 65 56 51 46 41 38 35 31 34 38 35 32 30 32 37 44 56 80 100 85 73 76 60 57 60 56 54 56 62 72 82 96 110 130 160 182 230 198 179 161 147 144 181 186 170 197 207 183 157 142 140 132 119 114 111 104 97 96 99 233 458 527 639 555 428 347 292 251 223 207 202 185 168 168 168 165 152 140 142 146 150 146 135 128 126 123 121 133 397 730 726 552 562 933 1550 1680 1550 1230 940 798 734 590 486 468 383 342 313 286 265 246 605 603 602 600 599 232 193 181 172 163 155 153 143 138 134 245 1160 1670 1540 1370 1320 1100 695 505 404 338 294 263 235 214 197 181 167 157 147 139 137 127 116 104 94 254 413 263 945 2230 2750 2850 2510 1470 601 367 338 598 829 755 683 497 358 292 239 199 178 160 144 132 118 108 148 278 272 218 151 115 96 84 76 69 64 60 55 54 53 46 41 37 34 31 28 26 25 23 22 20 38 38 207 698 979 1150 862 500 334 252 204 171 147 129 114 103 96 91 86 81 75 69 65 63 64 61 59 57 67 85 267 266 199 1443 100 30 52 0.1 4164 230 54 134 0.3 6862 639 96 229 0.5 19272 1680 121 622 1.3 13866 1670 134 462 1.0 20772 2850 94 670 1.4 2635 278 20 85 0.2 7394 1150 57 246 0.5 Appendix D-7. Continued Day Oct Nov Dec Jan A-97 Sangamon River near Monticello (111), Water Year 2004 1 157 103 620 799 2 132 96 524 677 3 120 95 458 613 4 112 92 428 889 5 109 97 419 1760 6 103 99 406 1910 7 93 116 404 1500 8 84 143 415 945 9 79 137 413 753 10 76 127 418 615 11 73 119 440 531 12 71 116 487 492 13 72 112 451 451 14 82 126 406 413 15 82 153 383 386 16 106 138 364 360 17 129 130 340 350 18 118 332 323 368 19 106 1230 304 350 20 101 1950 284 288 21 97 2440 261 288 22 93 2730 267 295 23 91 2360 529 258 24 89 1830 1070 301 25 91 1800 1310 259 26 89 1890 1090 295 27 93 1750 772 277 28 100 1230 646 241 29 112 873 789 230 30 116 723 1090 220 31 111 1020 210 Total Max Min Avg Runoff 3087 157 71 100 0.2 23137 2730 92 771 1.6 17131 1310 261 553 1.2 17324 1910 210 559 1.2 Feb Mar Apr May Jun Jul Aug Sept 200 195 190 185 180 175 170 165 160 157 153 151 150 149 148 147 146 145 200 250 406 411 336 291 272 259 244 230 223 226 227 220 243 666 1190 1350 1070 749 575 479 414 364 339 319 312 303 295 281 269 257 245 236 233 246 1530 4740 4530 5070 4390 4780 3730 3300 3050 2510 1860 1270 980 832 725 635 572 524 488 456 427 405 384 365 348 342 368 460 509 437 403 380 362 340 320 303 298 293 296 291 294 287 271 251 238 231 230 238 295 582 958 1320 1420 1110 1610 1500 1230 954 767 674 1250 2130 2240 2240 1910 993 1090 1850 2410 3400 3390 2370 1000 680 572 497 505 1760 2710 3160 3790 3920 3420 2370 2140 2230 1930 999 748 631 539 494 474 441 399 362 333 309 289 276 264 259 243 227 210 212 393 578 622 500 900 637 431 322 260 231 190 163 144 130 115 103 94 87 81 75 77 75 70 67 63 60 57 53 56 48 45 45 41 43 41 35 30 29 27 26 24 28 27 27 25 27 38 112 169 190 322 460 368 235 160 119 94 79 69 62 55 50 45 41 38 36 33 33 31 28 24 23 25 23 21 20 19 18 17 18 16 16 16 6088 411 145 210 0.4 36148 5070 220 1166 2.5 27085 3730 303 903 1.9 27491 2240 230 887 1.9 49524 3920 333 1651 3.4 8497 900 75 274 0.6 2653 460 24 86 0.2 1464 235 16 49 0.1 Appendix D-7. Continued Day Oct Nov Dec Jan A-98 Sangamon River near Monticello (111), Water Year 2005 1 15 514 3110 230 2 14 798 2870 246 3 13 1100 2520 377 4 14 1250 2220 1160 5 13 1260 1850 2360 6 12 1050 1460 4440 7 12 824 1800 4740 8 14 645 2650 3960 9 13 513 2880 2980 10 12 432 3270 2280 11 12 389 2600 2010 12 15 349 1920 3170 13 20 306 1400 6620 14 20 273 1000 9360 15 20 251 774 10800 16 26 238 662 7530 17 30 231 593 3880 18 49 234 543 2670 19 121 321 493 1960 20 136 427 449 1330 21 157 474 401 909 22 134 430 380 729 23 119 372 279 595 24 111 442 260 511 25 102 944 240 480 26 105 1260 230 470 27 197 1590 220 460 28 268 2230 210 470 29 373 2410 210 473 30 450 2780 210 440 31 527 220 404 Total Max Min Avg Runoff 3124 527 12 101 0.2 24337 2780 231 811 1.7 37924 3270 210 1223 2.6 78044 10800 230 2518 5.4 Feb Mar Apr May Jun Jul Aug Sept 370 343 327 320 344 456 675 1150 1570 1680 1490 1120 1060 2140 2450 2540 2400 1980 1450 1030 875 857 848 795 729 670 618 580 548 503 452 422 404 387 379 365 346 326 318 313 299 278 262 252 249 247 244 237 227 226 299 500 624 766 738 647 547 485 448 409 431 413 450 424 384 358 334 313 296 284 314 380 356 350 324 300 288 276 267 380 620 821 949 858 687 561 468 408 373 342 316 295 276 261 249 241 236 230 228 221 220 209 199 192 186 178 170 176 196 287 268 225 199 181 167 158 151 146 140 134 129 124 124 125 121 115 109 103 100 103 120 107 105 191 251 219 172 138 119 106 98 90 83 76 71 66 61 55 52 128 124 92 67 54 50 45 41 39 34 29 25 30 36 48 58 47 40 40 96 170 80 55 113 172 97 70 56 111 146 93 62 47 38 30 27 25 21 20 25 22 18 15 14 15 16 19 22 21 18 78 27 20 19 16 16 14 13 11 10 9 8 8 7 7 6 6 6 5 5 5 4 4 4 4 3 5 7 5 7 8 16 11 10 11 11 8 20 17 14 23 23 18 30867 2540 320 1102 2.1 12338 766 226 398 0.9 13076 949 267 436 0.9 6677 342 134 215 0.5 3461 251 52 115 0.2 2220 172 25 72 0.2 662 78 8 21 0.0 279 23 3 9 0.0 Appendix D-7. Continued Day Oct Nov Dec Jan A-99 Sangamon River near Monticello (111), Water Year 2006 1 16 18 211 242 2 18 23 164 253 3 17 33 127 235 4 15 43 105 213 5 12 39 79 199 6 9 40 70 184 7 7 30 66 167 8 7 31 62 154 9 6 46 59 144 10 6 59 55 133 11 5 47 54 125 12 5 38 57 118 13 5 32 58 118 14 5 28 57 128 15 5 37 57 147 16 4 38 56 236 17 4 46 53 261 18 4 77 45 249 19 3 82 40 271 20 9 70 35 279 21 8 62 32 248 22 6 55 30 249 23 6 50 34 318 24 6 44 39 319 25 6 40 52 282 26 6 38 71 248 27 5 39 101 214 28 6 67 150 195 29 5 83 209 241 30 4 179 237 366 31 14 249 490 Total Max Min Avg Runoff 233 18 3 8 0.0 1514 179 18 50 0.1 2714 249 30 88 0.2 7026 490 118 227 0.5 Feb Mar Apr May 444 367 323 286 256 228 207 189 176 170 165 160 153 149 146 163 238 339 280 200 260 245 219 195 174 158 149 148 147 146 139 130 122 119 119 129 186 571 914 1230 1490 1490 1490 1870 1840 1200 761 607 539 476 431 396 367 340 318 313 301 293 323 383 414 467 561 678 742 1250 1420 1370 1230 932 719 601 563 793 1030 1160 1230 1530 1870 1590 1000 722 601 527 474 430 393 362 370 377 410 461 526 487 424 382 350 329 316 351 361 349 331 304 291 329 405 370 323 289 263 245 233 234 240 246 232 207 192 186 6187 444 146 221 0.4 18797 1870 119 606 1.3 25412 1870 362 847 1.8 10043 526 186 324 0.7 Jun Jul Aug Sept 190 190 184 177 166 157 151 144 139 133 134 131 129 120 111 105 99 99 97 92 89 84 79 74 70 76 70 78 113 87 70 57 49 51 43 63 53 42 34 31 55 86 274 299 225 154 111 86 70 58 53 53 45 38 33 147 1580 1820 909 451 280 194 144 109 87 71 59 51 44 69 70 62 52 76 68 54 43 33 89 80 66 47 39 32 27 23 21 38 455 345 162 115 92 75 61 49 43 37 33 70 71 51 46 43 38 53 57 43 35 37 32 26 24 28 27 25 27 71 67 54 43 37 3568 190 70 119 0.3 7320 1820 31 236 0.5 2825 455 21 91 0.2 1395 92 24 47 0.1 Appendix D-7. Continued Day Oct Nov Dec Jan A-100 Sangamon River near Monticello (111), Water Year 2007 1 32 178 959 1240 2 28 166 1590 1440 3 25 154 1840 1470 4 24 143 2140 1370 5 22 137 2100 1450 6 60 133 1580 1630 7 59 132 962 1650 8 45 131 682 1570 9 35 128 557 1300 10 29 131 491 1010 11 29 148 468 817 12 27 161 658 714 13 24 252 1020 983 14 22 267 1250 1510 15 26 247 1360 2380 16 45 287 1330 2780 17 188 420 1050 2740 18 348 548 794 2500 19 718 471 656 1920 20 690 371 577 1250 21 467 309 816 880 22 344 271 1630 733 23 273 246 2370 647 24 239 228 2840 579 25 211 215 3060 521 26 196 202 2520 479 27 193 190 1890 480 28 203 180 1320 464 29 220 175 952 434 30 220 246 768 333 31 202 862 331 Total Max Min Avg Runoff 5244 718 22 169 0.4 6867 548 128 229 0.5 41092 3060 468 1326 2.8 37605 2780 331 1213 2.6 Feb Mar Apr May Jun Jul Aug Sept 433 389 322 325 297 292 275 258 250 236 228 225 213 185 170 161 178 190 201 214 220 246 328 445 800 1500 1800 1900 1800 1650 1850 1800 1770 1080 710 586 520 563 677 730 666 610 573 528 468 408 382 375 389 397 484 1060 1530 2030 1990 1620 1210 928 846 983 1040 1110 1120 919 747 623 540 479 436 469 551 619 643 611 574 536 493 450 411 375 351 337 323 337 615 1070 1360 1770 1740 1210 771 604 521 466 420 381 353 337 323 304 287 265 249 251 259 243 226 211 201 195 187 178 166 158 156 242 432 350 286 241 215 198 187 180 173 163 157 144 132 124 115 108 104 99 94 88 83 82 82 83 81 89 137 343 441 317 354 480 783 703 448 326 249 201 171 149 131 116 105 94 85 77 70 65 57 51 64 68 97 246 345 233 149 110 89 76 70 67 60 59 54 51 46 40 35 33 33 29 27 25 23 22 20 18 17 17 17 17 17 17 22 18 20 29 35 28 22 17 15 18 15 13 12 11 10 10 10 12 15 17 13 11 12 12 12 11 9 8 8 7 7 6 6 5 5 5 6 6 5 6 7 6 12281 1900 161 439 0.9 30230 2030 375 975 2.1 21632 1770 323 721 1.5 10473 1210 156 338 0.7 6339 783 81 211 0.4 4182 448 51 135 0.3 756 51 13 24 0.1 269 17 5 9 0.0 Appendix D-7. Concluded Day Oct Nov Dec Jan A-101 Sangamon River near Monticello (111), Water Year 2008 1 7 15 113 477 2 7 16 105 379 3 10 15 99 263 4 7 14 122 306 5 9 13 197 390 6 8 11 186 354 7 8 10 158 400 8 9 10 133 1040 9 8 10 121 3480 10 7 8 113 7960 11 6 8 120 7810 12 6 9 353 4190 13 5 10 850 2590 14 6 11 1040 2000 15 5 15 1420 1560 16 9 28 1570 1120 17 7 39 1010 850 18 15 37 591 692 19 10 30 454 564 20 14 25 391 424 21 11 47 370 403 22 16 40 587 487 23 22 278 1010 405 24 18 433 1220 356 25 15 295 1410 330 26 15 210 1300 316 27 13 167 765 306 28 13 151 568 294 29 14 139 527 297 30 13 124 566 268 31 12 547 292 Total Max Min Avg Runoff 321 22 5 10 0.0 2218 433 8 74 0.2 18016 1570 99 581 1.2 40603 7960 263 1310 2.8 Feb Mar Apr May Jun Jul Aug Sept 267 274 279 352 2770 10000 10300 8210 4530 2520 2040 1360 944 716 660 497 1020 1680 1690 1820 1280 736 532 433 395 363 339 309 328 588 780 1180 1590 1670 1440 911 670 551 492 473 562 750 917 929 835 755 1160 1850 2030 1900 1650 1210 918 770 673 634 878 870 752 679 805 840 738 657 586 523 474 436 415 465 978 1190 1080 851 696 613 550 499 462 435 423 390 360 338 336 392 445 424 381 349 327 334 399 441 367 323 308 376 657 891 1090 1480 1610 1680 1690 1610 1550 1410 1100 896 784 676 603 707 715 655 579 590 603 617 1550 1910 1450 2440 11500 8340 5390 4530 4670 4000 3260 2620 2020 1320 950 783 679 593 527 479 441 408 388 364 335 320 314 318 319 391 417 332 286 263 260 244 224 760 1230 2560 1830 945 1580 3230 2280 1690 1120 762 588 491 443 397 845 998 596 447 372 323 288 266 378 364 296 258 230 228 214 188 171 155 142 131 121 114 107 100 93 85 79 75 72 67 63 66 61 57 54 50 47 46 46 48 43 42 45 49 129 311 256 211 154 128 108 95 111 160 1940 5250 5600 5320 4020 2900 2010 1090 773 612 478 387 330 290 262 242 227 56644 10300 267 1953 3.9 31067 2030 473 1002 2.1 17131 1190 336 571 1.2 26618 1690 308 859 1.8 61476 11500 314 2049 4.2 26392 3230 224 851 1.8 3507 296 43 113 0.2 33530 5600 42 1118 2.3 Appendix D-8. Mean Daily and Monthly Discharge (cfs) and Runoff (inches) for Sangamon River near Fisher (Station 112) Day Oct Nov Dec Jan A-102 Sangamon River near Fisher (112), Water Year 1993 1 22 83 330 659 2 21 550 280 492 3 20 1080 249 389 4 20 1300 230 1910 5 19 1290 210 4860 6 19 1250 190 2610 7 19 1180 180 1300 8 19 995 169 1000 9 18 760 161 760 10 18 540 168 600 11 17 490 169 490 12 17 710 134 400 13 16 1220 128 350 14 16 1690 170 300 15 21 1300 370 270 16 32 980 717 240 17 32 730 863 210 18 29 550 656 195 19 22 393 478 185 20 18 340 401 180 21 16 320 340 600 22 17 880 303 1510 23 17 920 268 1730 24 17 1010 217 1920 25 16 1100 205 1360 26 17 900 210 867 27 19 710 200 655 28 22 560 173 549 29 24 470 164 481 30 30 370 381 400 31 35 673 362 Total Max Min Avg Runoff 645 35 16 21 0.1 24671 1690 83 822 3.8 9387 863 128 303 1.4 27834 4860 180 898 4.2 Feb Mar Apr May Jun Jul Aug Sept 324 264 240 219 203 201 190 187 173 171 171 304 383 328 274 253 213 195 185 180 183 190 146 140 133 130 130 133 140 183 508 1340 1890 1950 1750 1310 1010 858 758 625 547 457 381 375 455 410 354 324 303 400 1170 1500 967 702 576 490 423 373 354 764 1350 965 686 558 471 402 375 394 369 329 284 251 679 1250 1300 920 665 563 674 657 551 472 424 1070 1310 788 577 474 432 379 348 330 345 763 692 516 427 360 310 260 240 230 210 190 170 155 148 140 130 124 120 112 150 140 130 120 110 150 190 240 170 250 435 442 859 848 581 443 514 682 536 446 341 287 247 216 199 274 369 640 745 515 350 280 242 211 188 691 2450 1800 2250 3480 2640 1570 900 596 460 401 339 290 373 358 278 482 463 335 285 242 381 305 222 184 295 669 2220 1660 816 489 345 268 220 188 163 137 126 109 103 94 81 73 83 88 164 254 156 111 97 114 100 94 506 522 267 188 155 132 115 92 79 69 75 79 65 143 1540 2100 1360 1030 1920 1320 749 433 302 180 160 190 540 650 620 500 330 230 200 170 190 180 170 270 520 660 733 700 5843 383 130 209 0.9 22883 1950 140 738 3.5 20004 1350 251 667 3.1 7929 763 110 256 1.2 16251 2450 170 542 2.5 23816 3480 184 768 3.6 4614 522 69 149 0.7 18155 2100 65 605 2.8 Appendix D-8. Continued Day Oct Nov Dec Jan A-103 Sangamon River near Fisher (112), Water Year 1994 1 450 220 700 135 2 300 201 1000 120 3 250 198 1150 110 4 220 193 1000 100 5 200 187 780 90 6 190 161 602 80 7 180 146 472 76 8 400 138 395 78 9 640 130 346 84 10 900 124 323 77 11 700 122 269 73 12 505 123 245 70 13 350 167 237 67 14 290 402 274 65 15 400 764 452 64 16 600 632 391 63 17 850 637 324 63 18 1200 1150 342 64 19 2300 950 345 64 20 1800 679 312 66 21 1400 506 285 69 22 1100 412 252 74 23 980 351 223 85 24 860 320 205 114 25 740 323 190 263 26 550 703 180 412 27 450 1200 170 271 28 370 900 160 816 29 313 650 140 1030 30 268 520 150 498 31 245 160 199 Total Max Min Avg Runoff 20001 2300 180 645 3.1 13209 1200 122 440 2.0 12074 1150 140 389 1.8 5440 1030 63 175 0.8 Feb Mar Apr May Jun 150 130 115 100 85 80 75 70 67 63 59 56 56 70 200 340 290 320 344 391 389 249 179 130 100 85 77 72 70 80 100 250 400 650 835 1000 750 580 460 380 330 280 244 202 174 175 149 136 136 121 115 114 106 100 143 163 138 120 112 110 107 122 132 127 118 107 124 142 245 382 9250 7710 1950 1150 922 722 582 479 387 334 294 257 237 216 197 188 188 301 306 532 483 378 315 273 245 389 623 514 393 327 291 252 235 240 209 186 172 161 155 147 138 131 128 139 139 118 107 102 98 94 89 83 79 77 76 75 71 72 95 82 74 69 66 63 58 54 52 50 48 55 53 47 44 49 47 40 39 36 33 32 4342 391 56 155 0.7 8613 1000 70 278 1.3 27386 9250 107 913 4.2 7714 623 94 249 1.2 1808 95 32 60 0.3 Jul Aug Sept 31 27 30 32 28 76 158 54 37 28 24 20 19 19 28 20 16 16 14 14 24 23 18 13 13 13 11 10 8 7 7 7 17 35 19 16 15 11 13 11 9 7 11 12 51 33 17 10 8 7 7 13 9 7 7 6 5 6 8 6 6 10 11 5 4 4 4 8 5 2 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 5 17 11 5 4 3 1 839 158 7 27 0.1 396 51 5 13 0.1 92 17 0 3 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-104 Sangamon River near Fisher (112), Water Year 1995 1 1 47 82 86 2 3 58 72 65 3 4 47 65 58 4 4 46 59 55 5 2 72 55 53 6 3 231 56 54 7 4 195 458 57 8 7 102 836 59 9 28 72 615 56 10 25 74 453 57 11 14 78 342 63 12 7 63 255 88 13 3 54 211 278 14 5 54 176 981 15 6 67 155 1410 16 4 60 148 1100 17 2 53 241 732 18 2 49 264 529 19 7 43 211 664 20 14 38 185 1390 21 12 54 163 1150 22 9 78 146 660 23 9 60 137 412 24 12 53 126 312 25 13 50 117 258 26 13 44 109 226 27 12 46 103 211 28 12 205 101 203 29 12 180 92 166 30 12 108 86 165 31 19 86 152 Total Max Min Avg Runoff 280 28 1 9 0.0 2381 231 38 79 0.4 6205 836 55 200 0.9 11750 1410 53 379 1.8 Feb Mar Apr May Jun Jul Aug Sept 158 153 140 134 99 92 88 85 82 80 79 77 75 73 72 72 72 74 78 72 71 65 68 63 58 62 62 61 54 47 54 60 59 65 497 1150 912 581 488 431 370 314 272 242 214 191 187 180 176 162 205 216 190 177 234 289 238 208 183 167 156 143 136 116 120 113 143 227 364 583 854 836 567 426 350 299 515 853 675 583 485 392 343 294 260 253 221 205 202 193 184 163 153 146 135 129 130 452 1360 2340 1450 862 1340 1430 909 1230 1490 2210 1940 1210 753 551 1750 3500 2270 1330 1110 1090 764 580 497 429 373 320 292 281 274 236 212 638 833 486 343 278 234 204 182 168 158 151 149 144 163 507 323 212 179 294 435 320 211 165 142 132 128 107 93 85 82 80 79 72 66 60 55 51 48 44 40 38 40 39 39 39 40 42 34 45 36 28 26 22 19 30 126 145 92 202 437 416 408 217 120 80 61 50 42 40 196 128 169 114 71 54 44 37 32 29 25 23 20 17 15 12 11 11 10 8 8 15 16 13 10 7 7 7 6 5 6 6 4 4 5 7 7 10 13 3 2 2 2 2 2365 158 58 84 0.4 8646 1150 47 279 1.3 10881 854 113 363 1.7 33154 3500 129 1069 5.1 9315 833 144 311 1.4 2186 211 26 71 0.3 3466 437 17 112 0.5 233 16 2 8 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-105 Sangamon River near Fisher (112), Water Year 1996 1 1 134 73 30 2 2 240 67 28 3 2 342 67 26 4 2 203 61 24 5 3 131 58 23 6 3 104 57 22 7 8 95 49 21 8 7 77 45 20 9 5 60 42 19 10 4 62 40 18 11 4 277 39 18 12 4 401 41 19 13 4 294 43 20 14 3 219 45 22 15 6 185 48 24 16 5 161 50 30 17 4 157 44 88 18 4 202 52 573 19 4 188 73 716 20 9 164 60 467 21 25 142 50 281 22 20 120 44 200 23 15 110 38 191 24 14 94 34 238 25 18 88 32 153 26 20 89 30 157 27 41 93 28 113 28 45 87 28 95 29 30 71 28 80 30 19 68 29 70 31 53 29 60 Total Max Min Avg Runoff 383 53 1 12 0.1 4658 401 60 155 0.7 1424 73 28 46 0.2 3846 716 18 124 0.6 Feb Mar Apr May Jun Jul Aug Sept 50 47 42 40 41 44 48 55 60 70 60 55 48 45 44 42 40 40 43 46 44 42 42 44 47 51 62 85 70 60 50 42 49 71 132 80 55 99 80 70 65 63 62 63 67 72 71 70 69 69 75 78 81 104 88 79 74 74 70 77 203 234 194 158 121 105 101 94 86 79 75 77 75 67 67 70 59 57 77 92 78 179 320 233 194 164 123 108 166 260 210 165 145 135 159 329 262 344 871 1950 3820 1770 1170 925 845 929 776 589 464 381 340 305 270 247 266 299 807 1890 1470 995 638 479 1270 1520 1100 730 524 442 372 327 328 525 466 394 323 274 244 252 998 588 340 267 230 198 180 157 137 128 120 112 106 98 92 86 79 74 69 65 61 57 50 45 42 40 40 50 43 37 33 30 25 97 317 166 111 105 81 64 62 61 84 156 93 68 54 44 37 31 26 22 18 15 13 12 14 13 11 9 9 24 62 44 26 17 13 11 10 8 8 8 7 5 5 5 5 4 3 4 3 3 4 6 7 3 2 2 1 1 1 3 2 2 1 1 2 2 1 2 2 19 20 9 3 1447 85 40 50 0.2 2259 132 42 73 0.3 3916 320 57 131 0.6 23766 3820 135 767 3.6 13131 1520 106 438 2.0 2420 317 25 78 0.4 736 93 5 24 0.1 122 20 1 4 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-106 Sangamon River near Fisher (112), Water Year 1997 1 2 15 41 44 2 1 13 44 53 3 3 11 38 70 4 3 11 30 75 5 3 11 30 118 6 3 10 41 130 7 4 34 27 100 8 2 59 22 86 9 2 43 20 74 10 4 22 22 60 11 5 14 41 50 12 5 10 175 45 13 4 7 121 41 14 5 7 89 37 15 3 5 76 34 16 1 7 66 31 17 1 8 60 29 18 2 7 47 28 19 3 7 40 26 20 2 7 31 26 21 3 6 32 56 22 2 8 35 251 23 5 6 45 749 24 12 6 140 770 25 7 11 130 445 26 5 16 100 271 27 5 12 78 210 28 5 11 65 160 29 14 9 57 140 30 7 13 51 130 31 11 47 130 Total Max Min Avg Runoff 132 14 1 4 0.0 405 59 5 13 0.1 1841 175 20 59 0.3 4469 770 26 144 0.7 Feb Mar Apr May Jun Jul Aug Sept 140 160 350 550 665 613 369 250 161 135 110 94 80 74 68 63 61 112 355 423 1360 1760 1300 802 551 530 2370 2140 1300 994 805 631 502 411 341 312 362 746 689 484 393 618 635 437 358 323 295 282 263 237 199 181 195 177 166 169 181 158 148 136 132 131 132 137 151 135 114 108 105 114 146 172 144 129 125 117 112 139 149 136 123 113 107 97 88 90 95 89 86 92 77 290 385 258 193 149 143 131 110 104 105 96 91 83 72 72 73 78 71 60 55 55 57 318 999 1880 1550 1100 747 564 484 652 817 650 486 410 438 452 647 514 397 391 747 771 487 375 308 264 231 208 195 177 158 146 142 182 150 127 118 115 201 139 107 94 87 80 75 70 368 170 90 72 64 60 67 56 47 42 40 37 33 38 43 40 34 30 27 24 22 19 16 15 15 15 14 16 15 10 8 7 10 10 10 15 11 9 10 384 762 253 133 96 72 57 47 42 39 35 31 28 25 23 22 21 20 17 16 16 14 15 62 103 66 47 37 30 27 24 22 23 21 21 22 18 17 17 17 15 14 12 11 7 15646 2370 61 559 2.4 12992 1300 148 419 2.0 3652 172 86 122 0.6 10058 1880 55 324 1.5 11239 817 115 375 1.7 2292 368 16 74 0.3 2217 762 7 72 0.3 774 103 7 26 0.1 Appendix D-8. Continued Day Oct Nov Dec Jan A-107 Sangamon River near Fisher (112), Water Year 1998 1 15 23 63 73 2 26 20 54 63 3 23 17 45 54 4 7 15 40 55 5 9 14 37 91 6 8 12 31 293 7 8 12 31 333 8 9 12 29 578 9 9 11 28 1150 10 9 11 29 938 11 10 10 30 552 12 10 9 29 353 13 10 8 28 267 14 11 8 30 212 15 16 10 34 207 16 13 11 30 173 17 18 11 28 154 18 15 10 28 136 19 14 10 29 122 20 21 11 30 114 21 21 11 31 109 22 18 12 33 105 23 16 12 37 100 24 18 11 41 94 25 21 11 136 86 26 23 10 163 82 27 33 10 121 81 28 33 13 98 91 29 29 40 84 116 30 29 50 75 130 31 25 58 127 Total Max Min Avg Runoff 528 33 7 17 0.1 425 50 8 14 0.1 1560 163 28 50 0.2 7039 1150 54 227 1.1 Feb Mar Apr May Jun Jul Aug Sept 130 132 123 120 116 107 99 93 87 84 95 204 226 187 159 150 160 291 351 306 267 231 211 190 169 162 181 194 181 171 162 148 132 123 119 182 832 1200 875 544 408 392 394 353 663 2270 2050 1900 1780 1740 1330 935 690 530 445 723 931 800 590 564 535 435 520 577 461 390 794 1080 723 497 396 348 524 520 402 329 271 248 231 236 225 204 191 180 178 155 140 150 215 338 444 716 1510 1170 740 1130 2750 2350 1300 796 527 408 330 289 261 226 207 196 202 189 450 1100 950 520 253 218 190 171 159 153 138 129 119 114 109 101 93 88 184 312 518 1040 928 689 1130 2760 3800 2280 1370 988 651 479 1210 1160 646 388 297 245 507 791 644 355 256 236 228 250 351 285 220 183 149 127 113 100 86 78 68 60 55 49 44 49 99 70 47 38 33 31 27 24 22 21 19 18 19 19 24 33 42 29 24 20 17 15 14 15 15 14 12 12 12 11 10 9 9 8 7 6 6 6 6 6 6 6 5 5 5 5 4 4 4 5 3 2 2 2 2 7 4 3 3 4 5 4 3 4 4 6 7 5 3 4 4825 351 84 172 0.7 23593 2270 119 761 3.6 11719 1080 140 391 1.8 20243 2750 153 653 3.1 23264 3800 88 775 3.6 4377 644 22 141 0.7 479 42 6 15 0.1 126 7 2 4 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-108 Sangamon River near Fisher (112), Water Year 1999 1 4 13 11 4 2 3 9 10 4 3 4 9 10 4 4 4 8 9 4 5 5 8 8 3 6 8 7 8 4 7 16 9 10 4 8 10 10 11 4 9 7 12 9 4 10 4 19 7 4 11 3 21 6 3 12 3 13 5 3 13 3 11 6 3 14 3 7 6 3 15 3 6 6 3 16 3 6 6 4 17 3 7 6 6 18 3 8 5 10 19 7 7 7 11 20 6 7 9 12 21 4 7 10 35 22 3 7 8 130 23 3 9 6 700 24 3 9 6 1000 25 3 9 5 800 26 4 9 4 600 27 3 9 3 445 28 5 9 3 455 29 12 9 3 334 30 13 10 2 251 31 19 3 226 Total Max Min Avg Runoff 174 19 3 6 0.0 284 21 6 9 0.0 206 11 2 7 0.0 5071 1000 3 164 0.8 Feb Mar Apr May Jun Jul Aug Sept 358 440 433 327 239 211 381 930 906 689 491 472 354 276 249 234 234 222 198 174 152 139 136 131 125 116 132 200 178 162 315 313 253 296 287 244 240 206 168 159 177 186 187 222 284 265 204 177 172 153 139 132 119 111 109 107 104 101 100 104 100 95 103 91 99 100 96 185 226 225 198 154 141 263 1130 2030 1440 982 720 566 507 431 370 327 303 284 268 261 241 225 214 203 192 188 181 168 151 137 130 127 127 186 320 291 240 215 208 176 156 148 146 134 137 125 111 102 96 92 88 89 98 632 916 503 495 454 315 251 215 186 164 180 341 739 943 587 318 250 214 187 165 148 136 245 536 341 370 292 234 175 206 347 237 173 138 120 105 92 84 75 66 59 54 49 45 40 36 37 33 31 31 28 24 21 19 17 17 21 24 19 15 12 10 9 9 8 7 7 8 9 8 7 10 23 17 10 7 7 5 5 4 4 4 3 5 25 31 16 8 5 3 3 4 2 2 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 2 3 2 2 2 2 4 7 8 8949 930 116 320 1.4 5870 315 100 189 0.9 12040 2030 91 401 1.8 5103 320 88 165 0.8 10630 943 98 354 1.6 2263 347 15 73 0.3 289 31 3 9 0.0 48 8 0 2 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-109 Sangamon River near Fisher (112), Water Year 2000 1 5 3 5 7 2 3 3 4 7 3 4 3 5 10 4 9 4 5 9 5 9 3 12 7 6 5 3 19 5 7 3 4 13 5 8 3 4 8 5 9 4 5 7 5 10 6 7 6 7 11 7 6 7 6 12 5 5 6 6 13 4 5 6 5 14 3 4 6 4 15 2 5 7 3 16 3 5 8 3 17 3 5 9 4 18 6 5 8 3 19 5 6 7 4 20 4 6 7 4 21 4 5 5 2 22 4 5 4 2 23 3 5 4 2 24 3 6 4 2 25 2 7 4 3 26 2 6 4 3 27 2 5 4 2 28 3 5 5 2 29 3 5 5 2 30 3 4 6 2 31 3 8 3 Total Max Min Avg Runoff 123 9 2 4 0.0 142 7 3 5 0.0 207 19 4 7 0.0 135 10 2 4 0.0 Feb Mar Apr May Jun Jul Aug Sept 3 3 3 4 4 4 4 4 4 5 7 11 14 13 12 13 16 24 120 95 67 57 53 48 42 34 36 38 33 32 28 23 22 21 19 18 16 17 17 15 14 15 15 14 14 15 12 15 71 131 83 61 52 48 40 39 37 33 26 24 23 23 24 23 21 20 21 22 19 17 17 17 15 14 16 17 24 35 31 37 197 157 106 92 110 89 74 68 58 50 47 55 52 48 44 40 38 39 42 54 53 50 46 36 30 29 31 34 105 163 95 71 66 63 51 41 205 544 421 268 200 161 137 116 106 107 94 80 75 70 64 61 62 65 67 65 62 53 46 43 44 260 488 275 282 306 204 143 109 91 77 65 58 56 60 108 128 77 57 48 44 43 40 36 31 27 23 20 18 16 15 14 12 10 9 8 7 6 6 6 6 9 7 5 5 4 3 4 5 4 3 3 3 2 2 2 1 1 2 3 6 3 2 1 2 3 4 4 3 2 2 1 1 1 0 0 0 0 0 0 0 0 0 1 6 14 5 3 2 1 0 0 0 0 0 0 0 2 3 3 1 1 1 772 120 3 27 0.1 987 131 12 32 0.2 1437 197 14 48 0.2 3061 544 29 99 0.5 3813 488 43 127 0.6 1062 128 6 34 0.2 90 7 1 3 0.0 47 14 0 2 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-110 Sangamon River near Fisher (112), Water Year 2001 1 0 5 27 25 2 0 6 26 24 3 0 7 26 23 4 3 7 28 23 5 8 7 29 26 6 8 9 27 27 7 12 17 27 25 8 10 24 28 24 9 6 27 22 21 10 4 151 21 21 11 3 147 23 22 12 3 85 36 24 13 2 68 63 25 14 2 82 50 26 15 2 67 45 32 16 3 54 42 47 17 3 46 43 59 18 3 35 30 54 19 3 31 31 47 20 2 30 29 41 21 1 24 26 34 22 1 24 24 32 23 1 22 21 31 24 2 21 23 32 25 2 22 23 29 26 2 27 22 28 27 2 33 25 29 28 2 33 28 32 29 3 30 29 57 30 3 29 29 749 31 3 27 1520 Total Max Min Avg Runoff 101 12 0 3 0 1170 151 5 39 0 930 63 21 30 0 3189 1520 21 103 0 Feb Mar Apr May Jun 1510 1200 737 448 447 344 421 616 1450 2050 1300 748 484 558 885 786 534 369 303 266 215 196 183 384 3420 3030 1420 948 687 522 430 378 335 284 252 232 211 189 187 176 188 171 160 196 397 445 402 344 297 259 230 208 183 168 160 150 151 147 140 128 119 115 105 99 136 627 291 185 162 377 567 352 253 230 216 183 160 156 156 149 139 137 134 118 120 117 106 96 94 98 98 90 81 106 130 114 103 90 83 84 80 70 67 72 74 71 133 232 165 141 129 109 121 133 151 357 311 207 166 151 158 212 310 289 469 721 1090 842 511 366 298 246 208 184 171 153 136 126 118 108 110 146 125 106 92 83 76 72 71 64 25252 3420 183 902 4 8279 687 140 267 1 5827 627 94 194 1 4017 357 67 130 1 7661 1090 64 255 1 Jul Aug Sept 59 56 53 78 81 60 51 47 46 45 39 34 31 28 25 23 22 22 25 23 21 19 19 19 18 17 14 15 15 16 14 11 9 8 8 9 7 5 5 6 4 3 3 2 2 2 2 7 5 15 12 6 5 9 15 9 10 16 8 5 4 32 82 30 15 9 6 5 8 12 10 16 9 6 3 3 2 2 2 2 4 11 6 5 3 4 5 3 3 3 3 3 1035 81 14 33 0 243 32 2 8 0 274 82 2 9 0 Appendix D-8. Continued Day Oct Nov Dec Jan A-111 Sangamon River near Fisher (112), Water Year 2002 1 2 123 323 85 2 2 119 213 82 3 2 106 156 83 4 5 93 127 86 5 9 88 110 93 6 17 83 102 89 7 12 80 92 79 8 10 79 84 70 9 7 73 78 87 10 7 67 70 77 11 11 66 67 65 12 22 61 65 58 13 49 57 70 59 14 171 57 83 59 15 225 57 168 57 16 140 55 177 51 17 187 53 340 49 18 133 49 589 57 19 98 49 440 57 20 76 50 302 52 21 63 47 227 52 22 66 47 195 51 23 160 46 217 48 24 201 45 207 49 25 880 48 165 47 26 887 48 180 44 27 400 41 145 44 28 249 40 120 44 29 191 41 105 45 30 151 132 97 53 31 129 90 709 Total Max Min Avg Runoff 4563 887 2 147 1 2000 132 40 67 0 5404 589 65 174 1 2581 709 44 83 0 Feb Mar Apr May Jun Jul Aug Sept 1510 1290 915 627 429 336 281 233 205 202 215 232 199 169 167 154 136 118 299 1130 1270 950 659 496 406 358 315 276 244 317 827 774 529 486 733 805 983 1210 889 616 511 446 394 329 294 275 243 240 215 185 186 180 173 161 162 294 421 590 521 404 351 295 245 225 212 203 229 429 415 354 315 275 253 243 215 196 181 179 166 217 411 336 281 271 235 350 1370 1470 1080 759 588 478 397 348 327 312 281 553 879 720 2100 3620 2100 1320 971 810 824 798 635 513 456 418 395 358 319 292 284 283 261 244 226 210 200 186 232 420 335 265 232 225 243 404 608 1010 879 587 427 344 286 246 217 199 186 171 159 222 268 214 145 125 113 99 88 80 70 62 56 51 49 52 44 39 36 33 29 26 23 22 27 27 20 17 22 40 31 20 18 19 39 60 52 38 28 23 20 17 15 13 12 11 10 9 9 8 11 17 14 12 13 52 286 96 50 577 1610 881 320 187 120 83 63 51 42 37 32 29 24 22 20 19 17 15 14 13 12 12 12 13 12 14 17 18 19 14 12 10 9 9 8 8 8 8 13577 1510 118 485 2 14233 1210 161 459 2 11406 1470 166 380 2 22643 3620 244 730 3 9471 1010 125 316 1 1364 113 17 44 0 4657 1610 8 150 1 500 42 8 17 0 Appendix D-8. Continued Day Oct Nov Dec Jan A-112 Sangamon River near Fisher (112), Water Year 2003 1 7 9 9 69 2 7 8 7 47 3 6 8 8 35 4 7 7 8 30 5 9 8 7 27 6 10 11 7 25 7 8 12 7 24 8 7 10 7 19 9 8 10 8 22 10 6 11 7 25 11 6 14 7 17 12 7 13 7 15 13 6 12 8 14 14 6 11 9 13 15 6 11 9 13 16 6 11 9 12 17 6 12 9 12 18 6 12 10 12 19 5 11 56 11 20 7 11 68 11 21 6 12 43 10 22 5 11 29 10 23 4 10 21 10 24 4 9 18 9 25 4 9 17 10 26 5 9 17 10 27 6 9 15 12 28 5 8 13 13 29 6 8 13 14 30 9 9 15 15 31 9 65 15 Total Max Min Avg Runoff 200 10 4 6 0.0 306 14 7 10 0.0 531 68 7 17 0.1 580 69 9 19 0.1 Feb Mar Apr May Jun Jul Aug Sept 18 20 24 37 33 19 14 12 11 11 10 9 10 10 10 9 9 9 10 12 16 25 36 42 31 21 18 17 17 16 15 15 18 23 27 50 78 67 58 62 64 65 48 43 45 44 40 42 104 147 114 85 74 72 62 57 58 48 40 40 40 35 42 361 344 370 517 373 283 228 189 156 135 123 116 109 92 81 87 91 80 66 61 74 78 65 59 57 54 61 74 62 57 242 354 247 190 309 546 924 822 469 337 454 393 298 248 216 194 192 167 153 142 133 122 111 106 109 100 96 82 72 76 76 68 62 65 64 61 55 73 226 314 800 884 415 271 215 184 154 133 121 109 97 86 80 76 68 67 75 70 62 56 50 45 324 242 113 352 1900 2450 1520 678 313 232 182 144 411 738 342 260 261 202 177 137 113 96 86 81 69 60 53 48 206 203 132 76 56 45 40 35 31 28 26 26 25 22 20 19 17 16 15 14 12 11 8 6 6 5 57 201 100 356 623 320 184 117 81 60 49 41 36 32 29 25 25 26 22 20 18 18 16 15 15 15 15 14 14 79 79 49 37 502 42 9 18 0.1 1698 147 15 55 0.3 4406 517 35 147 0.7 7928 924 57 256 1.2 5129 884 55 171 0.8 11766 2450 45 380 1.8 1559 206 5 50 0.2 2430 623 14 81 0.4 Appendix D-8. Continued Day Oct Nov Dec Jan A-113 Sangamon River near Fisher (112), Water Year 2004 1 31 28 263 253 2 27 25 22 241 3 26 27 209 231 4 28 32 204 342 5 26 55 203 654 6 22 86 212 445 7 20 74 217 349 8 19 60 222 277 9 18 50 222 233 10 18 43 246 196 11 16 52 305 184 12 15 93 255 180 13 15 114 221 157 14 22 79 212 149 15 45 70 194 146 16 39 68 187 132 17 32 61 165 132 18 31 557 152 139 19 28 1630 144 101 20 25 1680 123 120 21 23 1130 127 110 22 23 693 138 92 23 23 513 429 103 24 22 911 684 92 25 23 959 461 98 26 35 646 338 94 27 40 483 280 87 28 40 407 261 83 29 39 345 333 78 30 32 307 356 74 31 29 291 70 Total Max Min Avg Runoff 832 45 15 27 0.1 11278 1680 25 376 1.7 7676 684 22 248 1.2 5642 654 70 182 0.9 Feb Mar Apr May Jun Jul Aug Sept 68 66 63 61 60 58 57 54 55 54 52 51 51 51 50 50 52 58 90 230 270 156 110 107 96 85 79 73 71 78 85 71 80 531 706 460 321 254 204 184 159 138 134 124 118 118 113 103 97 92 81 80 82 81 921 2560 1560 129 1190 1400 1490 1100 763 548 431 364 321 287 246 215 198 181 170 159 145 138 132 123 117 123 266 231 174 148 146 139 126 116 111 102 108 108 111 116 110 100 91 84 83 80 82 87 127 311 811 718 430 324 437 475 361 291 287 243 695 1280 932 467 322 369 2350 2770 1690 906 468 364 313 271 240 214 209 1310 2460 1740 926 457 408 1260 911 415 309 265 237 200 177 171 171 147 133 122 113 106 98 94 96 86 75 73 67 62 198 251 135 95 102 120 86 75 67 57 51 47 43 40 36 32 30 29 27 24 25 28 25 21 19 23 26 18 14 13 12 16 13 10 10 9 9 9 8 8 8 9 12 10 8 8 23 82 58 32 43 63 45 30 22 17 14 12 11 9 8 7 6 7 7 7 6 6 8 12 7 5 5 5 5 4 4 5 4 3 3 4 4 2378 270 50 82 0.4 12254 2560 71 395 1.9 8810 1490 102 294 1.3 12390 2350 80 400 1.9 19377 2770 113 646 3.0 2355 251 24 76 0.4 662 82 8 21 0.1 246 30 3 8 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-114 Sangamon River near Fisher (112), Water Year 2005 1 3 180 1310 10 2 3 660 1310 139 3 4 781 1000 371 4 3 549 719 1290 5 2 478 542 1710 6 2 372 503 2310 7 3 291 1250 1630 8 3 223 2570 1050 9 5 183 1650 708 10 5 166 1080 578 11 4 152 751 750 12 5 132 553 2010 13 15 115 448 6310 14 16 102 351 7590 15 10 95 302 2460 16 10 93 279 1180 17 11 91 251 741 18 17 88 235 480 19 68 119 213 398 20 60 188 181 334 21 45 159 236 284 22 36 132 161 253 23 33 124 137 177 24 38 162 140 170 25 41 534 130 169 26 34 549 120 170 27 98 909 110 175 28 146 1660 110 183 29 163 1470 110 177 30 200 1200 115 164 31 187 120 145 Total Max Min Avg Runoff 1269 41 200 2 0.2 11957 399 1660 88 1.8 16987 548 2570 110 2.6 34209 1104 7590 103 5.2 Feb Mar Apr May Jun Jul Aug Sept 132 124 121 124 168 263 353 688 793 573 415 365 447 1300 1380 1040 758 531 403 355 409 425 378 340 310 280 252 252 232 197 177 175 171 156 163 153 133 129 137 129 117 106 100 98 100 100 98 94 87 87 98 118 155 215 190 171 151 137 172 178 207 240 195 173 157 145 133 122 118 114 118 158 161 140 127 120 117 113 109 286 575 349 478 355 287 237 200 180 170 153 141 131 122 114 112 111 106 100 112 108 94 90 92 87 82 78 75 103 189 135 108 97 88 80 76 73 70 67 65 62 59 57 59 59 56 53 50 48 47 47 46 45 45 62 69 51 43 39 38 34 32 30 28 28 26 23 22 22 52 55 34 26 22 20 19 20 17 15 13 11 10 16 27 24 21 16 13 16 16 11 10 50 32 17 13 12 56 42 22 15 11 9 8 7 7 9 15 8 6 5 5 5 6 12 14 11 8 7 6 7 9 10 9 6 4 4 4 4 4 4 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 3 4 5 3 3 3 6 3 2 2 15 9 7 5 6 9 12979 464 1380 121 2.0 4346 140 232 87 0.7 6362 212 649 109 1.0 3121 101 189 62 0.5 1325 44 69 22 0.2 647 21 56 10 0.1 215 7 15 3 0.0 111 4 15 2 0.0 Appendix D-8. Continued Day Oct Nov Dec Jan A-115 Sangamon River near Fisher (112), Water Year 2006 1 5 7 64 107 2 4 13 49 90 3 3 7 43 91 4 3 6 37 88 5 3 4 33 80 6 2 12 31 69 7 2 32 30 63 8 2 16 29 62 9 2 10 29 58 10 2 7 28 51 11 2 10 30 48 12 2 9 30 52 13 2 8 29 54 14 2 8 28 133 15 2 11 29 182 16 3 47 29 153 17 3 47 27 148 18 2 31 25 219 19 2 24 22 164 20 2 20 20 133 21 4 17 21 159 22 5 16 24 227 23 3 14 26 189 24 2 14 30 163 25 2 12 40 138 26 2 11 54 104 27 2 12 64 91 28 2 36 79 90 29 2 159 119 172 30 2 106 96 304 31 3 95 233 Total Max Min Avg Runoff 74 5 2 2 0.0 725 159 4 24 0.1 1290 119 20 42 0.2 3915 304 48 126 0.6 Feb Mar Apr May Jun 183 160 142 122 106 91 82 79 75 74 75 71 67 68 67 91 130 90 120 110 90 87 76 68 65 61 60 63 62 62 58 52 52 56 55 56 77 336 355 533 1190 1860 1140 726 492 367 303 262 236 202 179 170 157 141 132 140 132 125 160 184 157 281 415 326 320 736 863 582 400 322 278 233 590 806 552 1490 1460 938 627 469 384 327 284 255 230 211 192 179 194 217 268 353 295 246 215 193 179 169 165 175 201 181 160 153 179 185 177 158 139 125 113 103 102 129 145 120 100 89 83 80 83 78 70 63 58 59 55 50 49 56 52 45 42 41 38 36 36 36 36 34 33 31 28 27 27 84 51 35 29 2573 183 60 92 0.4 9868 1860 52 318 1.5 14285 1490 157 476 2.2 5197 353 80 168 0.8 1362 84 27 47 0.2 Jul Aug Sept 26 23 21 28 29 25 21 20 19 18 29 174 187 120 65 44 34 28 24 22 22 21 20 18 16 15 24 71 82 47 37 27 21 18 16 14 13 12 12 12 13 17 18 16 14 12 10 9 10 12 12 9 9 10 8 8 8 11 13 15 13 12 12 10 9 8 9 63 35 23 16 12 14 30 24 19 15 13 11 13 15 14 13 12 29 50 43 31 24 21 19 17 1330 187 15 43 0.2 403 27 8 13 0.1 624 63 8 21 0.1 Appendix D-8. Continued Day Oct Nov Dec Jan A-116 Sangamon River near Fisher (112), Water Year 2007 1 16 85 1250 921 2 16 72 1830 908 3 24 66 1340 624 4 57 62 866 503 5 34 60 521 860 6 25 59 393 1020 7 21 59 324 775 8 19 61 258 565 9 17 59 236 454 10 16 54 218 365 11 17 149 210 325 12 23 217 546 303 13 24 168 1010 760 14 23 141 1010 1190 15 20 163 713 1750 16 20 300 479 2010 17 403 362 388 1250 18 840 269 328 719 19 522 210 287 475 20 323 173 262 374 21 230 149 649 331 22 186 134 1880 305 23 158 123 2620 266 24 132 113 1720 243 25 111 105 1110 219 26 103 96 757 205 27 121 86 531 227 28 140 81 424 197 29 125 80 358 190 30 105 241 317 200 31 100 453 220 Total Max Min Avg Runoff 3971 840 16 128 0.6 3997 362 54 133 0.6 23288 2620 210 751 3.6 18754 2010 190 605 2.9 Feb Mar Apr May Jun Jul Aug Sept 170 150 138 134 128 121 115 110 105 100 92 84 76 70 67 65 70 76 90 102 135 160 267 443 901 2040 1540 893 742 1840 1530 670 316 263 218 178 194 334 387 306 279 265 238 196 165 147 150 190 177 177 792 1800 1580 1160 807 579 460 396 425 746 920 685 558 441 362 304 259 226 205 233 431 400 348 341 310 275 251 217 187 171 166 163 153 501 1460 1890 1420 975 642 498 411 347 310 281 235 207 198 183 174 165 152 140 135 136 137 126 114 110 108 102 96 89 85 86 95 158 188 140 117 102 96 90 87 86 85 75 66 65 55 49 48 46 43 41 39 38 35 35 42 38 31 35 47 82 126 113 98 84 103 121 84 56 43 38 35 30 26 24 22 20 20 18 15 14 13 12 17 89 423 377 157 88 54 38 30 25 23 25 26 26 21 17 16 14 13 13 12 12 11 10 10 9 9 8 8 11 9 9 8 8 15 31 22 13 10 10 18 11 9 7 7 6 5 5 5 5 5 6 7 10 11 10 7 6 6 5 4 4 4 4 3 3 2 2 2 3 3 3 3 3 3 3 8442 2040 65 302 1.3 16961 1840 147 547 2.6 15240 1890 153 508 2.3 5425 498 85 175 0.8 1999 126 31 67 0.3 1889 423 12 61 0.3 364 31 6 12 0.1 140 11 2 5 0.0 Appendix D-8. Concluded Day Oct Nov Dec Jan A-117 Sangamon River near Fisher (112), Water Year 2008 1 4 12 55 274 2 4 11 64 219 3 5 11 199 180 4 7 11 191 190 5 6 11 154 204 6 4 11 112 294 7 4 12 86 475 8 4 13 73 4750 9 4 15 62 7660 10 4 18 154 3020 11 4 25 396 1540 12 4 27 1590 1160 13 4 54 1730 896 14 4 69 1230 691 15 6 63 768 517 16 7 52 531 422 17 7 43 403 372 18 7 43 338 327 19 14 42 302 277 20 11 42 261 270 21 9 86 372 250 22 8 552 807 230 23 8 432 1350 210 24 8 243 1090 190 25 8 167 573 180 26 9 137 416 170 27 10 127 372 160 28 13 107 345 160 29 14 96 408 170 30 12 72 371 188 31 11 322 228 Total Max Min Avg Runoff 221 14 4 7 0.0 2604 552 11 87 0.4 15125 1730 55 488 2.3 25874 7660 160 835 4.0 Feb Mar Apr May Jun Jul Aug Sept 200 180 155 179 2470 7480 4210 1420 977 809 578 340 240 180 160 169 719 1660 897 352 237 222 182 149 143 143 133 124 123 200 566 1040 1040 556 314 236 199 181 167 168 291 468 457 406 333 310 694 992 1020 700 485 359 296 264 234 209 240 226 207 206 283 234 211 205 183 170 163 153 159 179 564 477 340 274 235 215 197 181 182 180 165 156 149 143 144 185 170 158 150 139 138 141 170 147 133 126 123 387 675 460 716 1310 1160 770 574 724 671 488 385 345 303 258 236 298 274 246 224 249 227 206 636 613 361 374 2060 2820 1950 1510 2100 1580 955 621 431 343 288 250 228 198 182 171 159 150 144 136 126 127 141 133 276 222 158 133 121 113 104 96 90 342 359 226 155 125 348 852 646 296 201 163 141 127 125 133 130 114 97 85 78 70 62 57 68 81 67 68 89 59 50 45 40 35 32 31 28 26 25 23 22 21 20 19 18 18 17 18 18 17 16 15 14 14 17 19 15 14 13 13 18 100 66 35 29 27 24 22 28 68 1460 5890 4080 2080 996 440 293 274 207 162 131 115 103 93 84 77 76 24831 7480 123 856 3.8 13064 1040 167 421 2.0 6344 564 139 211 1.0 12800 1310 123 413 2.0 18807 2820 126 627 2.9 5738 852 57 185 0.9 916 89 14 30 0.1 17018 5890 13 567 2.6 Appendix E. Nitrate-N Sample Concentrations (WY 1993-2008) by Station A-119 Table E-1. Nitrate-N Sample Concentrations (WY 1993-2008) for Long Creek (Station 101) Date Time (CST) Water temp (F) 05/06/93 05/14/93 06/04/93 06/15/93 06/21/93 06/29/93 07/07/93 07/22/93 07/28/93 08/10/93 08/17/93 08/23/93 09/01/93 09/10/93 09/16/93 09/28/93 10/06/93 10/13/93 10/25/93 11/10/93 11/16/93 11/24/93 12/08/93 12/17/93 12/23/93 01/10/94 01/28/94 02/03/94 02/10/94 02/17/94 02/24/94 03/01/94 03/08/94 03/17/94 03/23/94 03/29/94 04/04/94 04/11/94 04/18/94 04/25/94 13:55 10:15 12:32 12:32 12:50 15:56 11:12 11:33 10:37 15:29 12:02 12:43 11:56 13:08 12:56 11:21 11:49 10:51 13:17 13:25 13:17 10:41 13:20 10:38 10:58 11:32 11:24 15:00 12:15 11:44 11:38 13:30 11:39 10:50 15:22 10:19 14:26 14:28 11:18 11:29 - pH Nitrate-N (mg/L) Collection method* - 10.73 11.98 9.10 13.50 12.00 10.69 10.62 7.07 6.75 2.89 1.47 0.94 0.74 7.44 8.06 7.22 8.03 6.94 7.10 6.40 7.92 8.43 7.88 7.19 7.61 6.10 3.98 6.82 5.85 5.58 6.54 6.29 8.68 7.19 7.26 6.39 5.89 5.29 7.32 8.31 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-120 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 04/29/94 05/02/94 05/09/94 05/16/94 05/23/94 05/31/94 06/06/94 06/13/94 06/20/94 06/27/94 07/06/94 07/12/94 07/26/94 08/01/94 10/18/94 10/26/94 11/01/94 11/07/94 11/07/94 11/14/94 11/21/94 11/28/94 12/05/94 12/07/94 12/07/94 12/07/94 12/07/94 12/08/94 12/08/94 12/08/94 12/08/94 12/09/94 12/09/94 12/09/94 12/10/94 12/10/94 12/10/94 12/12/94 12/16/94 12/16/94 12/17/94 14:46 10:52 10:53 11:00 10:27 11:54 15:39 13:08 12:55 9:30 9:46 13:57 7:21 11:43 14:15 11:25 15:26 15:41 15:43 11:45 14:16 12:35 10:48 12:27 12:30 12:33 12:36 0:00 15:17 15:17 18:00 0:00 6:00 15:00 6:00 12:00 21:00 10:38 11:36 11:40 0:08 - - 8.42 10.07 10.31 9.98 10.24 9.91 9.66 11.57 10.33 9.58 7.63 6.49 0.91 0.10 <0.02 <0.02 0.04 0.92 0.93 0.83 1.86 2.84 2.12 2.30 2.39 2.41 2.42 3.67 3.10 3.21 3.45 3.87 3.60 3.87 3.69 3.74 3.80 3.81 3.54 3.30 3.82 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-121 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 12/17/94 12/18/94 12/19/94 12/19/94 01/17/95 01/17/95 01/23/95 02/01/95 02/16/95 02/22/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 03/01/95 03/07/95 03/07/95 03/07/95 03/07/95 03/07/95 03/08/95 03/08/95 03/08/95 03/16/95 03/22/95 03/28/95 16:15 8:00 8:15 11:33 10:21 11:29 14:55 11:36 11:26 10:42 11:29 11:42 14:00 16:00 18:00 20:00 22:00 0:01 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:01 10:17 10:28 12:00 16:00 20:00 0:01 10:51 16:19 11:36 15:29 12:48 - - 6.51 6.37 5.98 5.59 5.80 9.28 9.57 8.58 7.17 6.14 5.98 5.59 5.58 5.53 5.51 5.50 5.51 5.53 5.54 5.56 5.59 5.55 5.50 5.47 5.77 5.69 5.96 5.79 5.69 5.74 4.34 4.70 5.54 7.63 8.75 9.37 10.47 11.03 8.90 8.75 7.41 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-122 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 04/05/95 04/07/95 04/27/95 05/02/95 05/08/95 05/20/95 05/22/95 05/31/95 06/07/95 06/12/95 06/21/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/15/95 08/22/95 09/06/95 10/24/95 11/01/95 11/07/95 11/15/95 11/22/95 11/28/95 12/05/95 01/17/96 01/23/96 02/14/96 02/20/96 02/27/96 03/05/96 03/12/96 03/18/96 03/27/96 04/02/96 04/09/96 04/15/96 04/22/96 04/30/96 05/07/96 12:30 12:57 15:40 10:22 15:55 13:48 10:24 11:40 14:36 10:53 14:50 14:34 14:03 10:02 14:49 9:55 13:28 11:16 15:12 14:09 14:27 14:26 12:07 9:38 12:45 13:35 13:32 10:08 12:06 14:46 12:03 13:58 13:08 13:17 10:20 13:58 12:04 12:43 13:34 16:08 13:13 - - 7.41 6.90 9.38 9.00 7.18 10.77 11.59 9.90 11.96 12.12 10.92 10.07 7.57 3.71 1.44 1.88 1.54 0.21 <0.02 <0.02 0.12 0.62 0.47 0.52 0.29 0.07 4.63 4.79 4.12 2.85 8.80 4.52 7.60 6.65 5.60 10.69 8.81 7.79 8.14 13.89 11.89 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-123 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 05/08/96 05/08/96 05/09/96 05/09/96 05/14/96 05/21/96 05/29/96 06/04/96 06/11/96 06/18/96 06/25/96 07/01/96 07/10/96 07/16/96 07/22/96 07/30/96 08/05/96 08/13/96 08/20/96 08/27/96 10/16/96 10/22/96 10/30/96 11/19/96 12/03/96 12/18/96 01/03/97 01/22/97 02/04/97 02/18/97 02/27/97 03/04/97 03/11/97 03/19/97 03/25/97 04/01/97 04/09/97 04/14/97 04/22/97 05/06/97 05/13/97 14:50 18:50 11:13 13:30 11:23 14:36 9:59 15:40 13:08 13:58 13:08 16:10 13:20 11:48 14:27 11:35 15:07 10:38 14:46 11:22 15:22 13:36 10:39 14:20 11:15 10:27 15:47 15:22 15:06 14:43 11:14 15:05 14:48 13:31 11:22 13:56 12:58 15:05 12:50 14:32 13:21 - - 1.74 1.43 5.46 5.09 11.22 13.37 10.21 12.22 10.67 13.47 12.45 12.70 11.10 7.27 4.17 1.68 0.57 0.03 0.21 0.14 <0.02 <0.02 <0.02 0.09 0.25 0.05 0.05 1.25 4.95 5.47 6.17 11.48 11.68 11.52 10.92 9.77 8.86 8.82 7.68 11.90 10.13 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-124 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 05/20/97 05/28/97 06/03/97 06/09/97 06/17/97 06/25/97 07/01/97 07/08/97 07/15/97 07/21/97 07/28/97 08/05/97 08/12/97 08/19/97 09/03/97 09/10/97 09/12/97 10/15/97 10/28/97 11/04/97 12/04/97 12/16/97 12/29/97 01/06/98 01/27/98 01/29/98 02/03/98 02/10/98 02/17/98 02/24/98 03/03/98 03/17/98 03/24/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/05/98 05/12/98 05/19/98 12:32 13:45 15:35 13:50 13:54 10:47 10:19 15:14 14:50 11:55 15:31 14:41 14:08 15:10 15:00 14:41 12:00 12:56 14:59 13:49 15:13 14:35 14:31 14:57 15:03 12:27 15:55 14:43 15:11 13:34 14:31 15:22 13:01 15:19 14:43 14:27 13:54 15:13 12:50 15:00 14:59 - - 8.96 7.61 10.01 14.41 12.75 10.40 7.25 6.05 2.18 0.73 0.34 0.10 0.09 0.12 0.78 0.16 0.04 0.04 0.04 0.04 2.50 1.97 3.94 6.24 8.31 9.47 9.81 8.49 7.27 11.65 10.51 6.32 9.55 10.14 7.21 9.57 11.88 9.42 11.10 10.86 13.70 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-125 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 05/27/98 06/03/98 06/10/98 06/17/98 07/01/98 07/07/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 08/26/98 09/02/98 09/09/98 09/16/98 09/22/98 09/30/98 10/06/98 10/14/98 10/20/98 10/29/98 11/04/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 01/19/99 01/26/99 02/03/99 02/09/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/24/99 03/30/99 04/06/99 04/13/99 04/20/99 14:45 13:38 11:26 12:16 15:09 10:31 15:22 14:59 11:17 14:46 12:35 15:27 12:52 14:28 15:00 15:47 14:25 14:50 14:45 14:04 10:57 15:06 14:51 14:43 14:22 13:55 14:29 15:16 13:16 13:31 14:48 15:17 14:54 11:48 14:44 14:57 15:49 15:13 15:09 15:26 15:12 - - 14.53 12.33 12.22 9.23 10.37 11.48 10.72 7.17 6.26 5.88 4.83 3.01 1.38 0.48 0.23 0.27 0.20 0.33 0.19 <0.09 <0.09 4.03 7.20 6.41 5.93 5.69 6.48 5.48 11.54 11.77 11.42 11.81 11.10 10.19 9.85 9.90 9.81 9.09 10.77 10.31 13.60 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-126 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 04/27/99 05/05/99 05/11/99 05/18/99 05/25/99 06/01/99 06/03/99 06/09/99 06/15/99 07/01/99 07/08/99 07/13/99 07/21/99 07/27/99 08/03/99 08/11/99 08/17/99 08/25/99 08/31/99 09/07/99 09/15/99 09/22/99 09/28/99 10/05/99 10/13/99 10/18/99 10/26/99 11/01/99 11/08/99 11/15/99 11/22/99 11/29/99 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 02/01/00 02/09/00 02/15/00 15:39 15:35 15:13 14:39 14:35 12:53 13:50 11:10 15:15 13:04 14:10 15:11 13:57 14:56 14:22 14:00 13:49 11:24 14:51 14:43 15:04 14:26 14:55 14:30 11:04 14:58 14:28 14:50 13:53 13:50 13:25 14:27 14:35 14:01 14:37 14:18 13:49 13:31 12:32 14:14 12:32 52 63 56 49 53 42 45 43 36 42 43 36 35 36 37 - 12.39 11.24 13.05 12.46 12.78 12.54 12.83 13.30 12.41 10.34 9.16 6.90 3.14 1.31 0.43 0.29 1.20 0.84 0.41 0.16 <0.11 0.17 <0.11 0.17 0.45 0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.18 0.22 0.50 0.66 1.01 0.65 0.70 0.78 1.07 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-127 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 02/22/00 02/29/00 03/07/00 03/14/00 03/21/00 03/28/00 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/30/00 06/06/00 06/13/00 06/21/00 06/29/00 07/05/00 07/12/00 07/19/00 07/26/00 08/02/00 08/08/00 08/15/00 08/22/00 08/29/00 09/05/00 09/13/00 09/19/00 09/26/00 10/03/00 10/05/00 10/10/00 10/17/00 10/24/00 10/30/00 11/08/00 11/14/00 11/20/00 14:42 13:41 13:52 13:36 14:57 13:30 13:47 13:36 13:53 14:31 14:34 14:08 14:12 9:52 13:30 14:43 13:40 8:40 10:19 9:29 10:08 10:43 10:29 9:55 9:39 12:51 13:35 14:28 12:30 9:31 11:57 13:45 12:12 10:48 14:00 12:35 13:30 14:56 11:49 15:29 14:05 48 52 59 47 49 50 52 50 55 60 67 71 66 66 66 62 76 68 68 73 70 70 75 73 79 71 82 73 64 65 57 67 60 54 59 65 58 52 47 41 - 4.52 3.09 2.33 2.25 5.23 3.86 2.81 2.78 1.64 3.30 2.51 1.44 5.52 3.46 11.17 10.73 9.05 6.16 10.22 2.54 5.82 7.79 4.98 1.81 1.43 0.32 0.20 0.15 <0.06 0.12 0.09 2.63 3.02 3.58 10.25 7.94 6.52 5.15 6.59 10.12 9.98 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-128 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 11/28/00 12/05/00 12/14/00 12/18/00 01/16/01 01/23/01 01/31/01 02/06/01 02/14/01 02/20/01 02/24/01 02/24/01 03/06/01 03/15/01 03/21/01 03/27/01 04/03/01 04/10/01 04/17/01 04/24/01 05/01/01 05/09/01 05/14/01 05/21/01 05/30/01 06/05/01 06/14/01 06/20/01 07/02/01 07/10/01 07/18/01 07/24/01 08/01/01 08/08/01 08/22/01 09/06/01 09/12/01 09/19/01 09/26/01 10/04/01 10/11/01 14:17 14:40 13:30 12:45 15:45 14:22 16:06 15:41 16:34 15:07 15:24 16:36 15:20 13:23 16:12 15:25 13:54 13:48 14:15 12:55 13:52 14:20 10:45 12:03 13:55 9:00 8:41 10:27 14:51 14:55 9:25 10:24 12:30 13:49 12:01 12:56 12:17 11:31 10:36 12:25 11:45 43 37 34 32 37 37 38 43 43 44 44 44 40 49 45 54 65 50 58 67 67 59 64 62 60 75 71 71 82 73 79 81 81 73 72 67 64 54 61 62 7.9 8.20 7.91 8.00 7.69 7.48 8.05 8.25 8.32 8.00 8.13 8.20 8.00 8.28 9.79 9.55 9.65 9.06 7.31 7.97 7.35 8.52 11.23 11.03 5.31 5.00 11.41 11.35 11.11 10.67 9.87 9.04 12.45 10.85 10.56 9.53 9.26 9.93 8.59 13.06 12.65 12.36 9.27 4.94 1.58 0.41 0.18 0.10 0.22 0.18 0.24 0.23 0.08 <0.06 0.08 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-129 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 10/17/01 10/24/01 11/01/01 11/07/01 11/14/01 11/20/01 11/27/01 12/04/01 12/11/01 12/20/01 12/26/01 01/02/02 01/08/02 01/15/02 01/22/02 01/29/02 01/31/02 01/31/02 02/04/02 02/13/02 02/19/02 02/20/02 02/20/02 02/22/02 02/25/02 03/05/02 03/12/02 03/19/02 03/27/02 03/28/02 03/29/02 03/29/02 03/30/02 04/02/02 04/09/02 04/16/02 04/20/02 04/21/02 04/21/02 04/21/02 04/22/02 12:00 14:03 15:04 14:33 8:42 9:23 14:50 15:07 14:18 8:40 14:57 15:20 15:26 15:32 13:49 14:54 7:54 19:09 15:03 13:54 15:01 6:55 18:57 14:03 14:47 14:08 14:58 14:32 14:14 18:01 7:41 16:30 6:45 13:35 6:55 13:24 6:43 8:44 11:25 17:29 7:52 51 61 57 55 52 45 48 55 42 43 36 33 36 38 40 47 42 39 42 45 46 45 43 45 42 46 47 45 45 42 46 43 48 49 69 59 51 52 49 49 7.92 8.37 7.98 7.99 8.00 8.01 8.12 8.18 7.85 7.92 7.97 8.19 - 4.67 4.17 4.98 4.13 3.43 2.81 2.32 7.09 6.34 10.17 9.95 9.37 8.57 8.58 7.86 6.82 5.88 8.70 12.61 10.72 6.94 8.75 10.41 12.55 12.32 11.88 12.52 11.49 11.02 11.28 12.28 12.55 12.76 12.73 11.96 11.03 9.69 4.15 4.55 6.70 10.93 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-130 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 04/23/02 04/24/02 04/24/02 04/25/02 04/25/02 04/25/02 04/26/02 04/27/02 04/27/02 04/28/02 04/28/02 04/30/02 05/01/02 05/06/02 05/06/02 05/07/02 05/07/02 05/08/02 05/09/02 05/09/02 05/09/02 05/10/02 05/12/02 05/12/02 05/13/02 05/14/02 05/21/02 05/28/02 06/04/02 06/11/02 06/11/02 06/12/02 06/12/02 06/13/02 06/18/02 06/25/02 07/02/02 07/09/02 07/16/02 07/30/02 08/06/02 13:30 17:37 19:27 7:25 14:00 16:39 6:20 15:16 17:46 6:55 18:06 13:51 17:36 11:34 17:24 12:56 18:08 7:35 6:38 10:28 17:46 6:48 10:54 21:09 9:15 13:28 9:51 13:28 14:59 7:51 21:19 7:15 18:41 7:41 13:17 13:29 13:11 13:05 7:37 13:04 13:43 53 59 59 51 55 56 50 51 51 53 51 56 55 58 54 67 67 60 63 63 63 55 63 64 55 57 52 64 73 70 68 65 68 64 67 74 79 81 70 80 79 7.70 7.33 8.04 8.07 8.18 8.15 7.94 - 12.56 4.41 4.36 6.51 9.00 9.46 11.17 4.66 3.77 6.18 8.77 10.87 11.08 9.23 8.36 2.90 3.73 7.31 2.26 2.61 4.26 7.35 0.73 1.66 2.32 5.87 10.03 11.12 11.58 11.17 5.40 11.74 12.89 12.56 13.17 12.15 11.20 7.95 4.62 0.23 0.11 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-131 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 08/14/02 08/19/02 08/27/02 09/24/02 10/08/02 10/15/02 10/22/02 10/28/02 11/06/02 11/12/02 11/19/02 11/25/02 12/03/02 12/10/02 12/17/02 12/23/02 12/30/02 01/22/03 01/28/03 02/04/03 02/10/03 02/18/03 02/25/03 03/04/03 03/11/03 03/18/03 03/25/03 03/31/03 04/07/03 04/15/03 04/22/03 04/29/03 05/04/03 05/05/03 05/06/03 05/14/03 05/20/03 05/27/03 06/03/03 06/10/03 06/17/03 13:13 11:20 12:48 13:14 13:30 13:27 13:57 14:06 15:00 14:44 14:15 15:19 14:53 14:39 14:59 14:39 14:10 13:41 15:07 14:52 14:30 14:06 14:46 15:02 14:43 14:10 15:09 14:31 13:54 12:58 12:28 13:37 19:18 13:02 12:46 11:00 13:24 13:58 13:33 13:36 14:30 73 72 76 66 61 57 50 50 45 48 46 37 34 40 37 37 43 32 38 35 38 36 39 37 41 59 57 52 48 68 59 66 61 63 60 65 63 57 71 68 8.05 8.06 7.86 7.75 7.66 7.59 7.63 7.44 7.83 7.23 7.53 7.57 7.87 8.14 7.58 7.87 7.92 - <0.06 <0.06 0.10 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 0.08 0.31 0.43 0.08 0.18 0.40 0.25 0.75 1.07 0.56 0.18 0.55 0.72 0.34 0.17 0.18 0.20 0.92 0.43 3.89 3.94 12.64 9.68 9.37 6.73 6.01 11.52 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-132 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 06/24/03 07/01/03 07/08/03 07/09/03 07/10/03 07/10/03 07/15/03 07/22/03 07/29/03 08/05/03 08/12/03 08/19/03 09/01/03 09/01/03 09/01/03 09/02/03 09/10/03 09/16/03 09/30/03 10/07/03 10/14/03 10/21/03 10/28/03 11/05/03 11/10/03 11/18/03 11/21/03 12/02/03 12/09/03 12/17/03 12/22/03 12/30/03 01/06/04 01/13/04 01/21/04 02/17/04 02/24/04 03/03/04 03/09/04 03/16/04 03/23/04 13:22 13:13 12:51 21:56 6:44 11:07 10:55 12:19 12:50 13:09 12:10 12:16 6:41 13:36 16:48 7:15 11:12 11:20 13:18 10:13 10:12 12:06 10:46 12:40 10:35 12:50 10:05 13:05 10:45 12:05 10:50 12:00 13:50 11:40 10:35 15:05 12:10 14:00 12:30 10:10 12:07 76 75 84 77 71 72 75 75 74 72 71 77 66 68 68 68 69 66 55 57 55 60 50 55 42 57 41 40 45 47 8.06 8.02 8.04 8.06 7.91 8.00 7.69 7.45 7.38 7.32 7.68 7.83 8.115 8.08 8.00 7.85 7.49 7.87 10.31 8.43 4.28 2.80 2.48 3.41 5.53 1.82 1.01 0.29 0.19 0.15 0.21 0.51 0.59 0.67 0.33 0.11 <0.07 <0.07 0.20 <0.07 <0.07 <0.07 <0.07 1.12 5.38 4.25 3.14 3.15 2.74 9.57 12.65 11.98 12.54 7.63 10.32 9.42 13.18 11.47 9.77 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-133 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 03/29/04 04/07/04 04/15/04 04/19/04 04/27/04 05/04/04 05/11/04 05/18/04 05/25/04 06/02/04 06/07/04 06/14/04 06/21/04 06/28/04 07/13/04 07/20/04 07/27/04 08/04/04 08/10/04 08/17/04 08/24/04 08/26/04 08/31/04 09/07/04 09/14/04 09/22/04 10/05/04 10/12/04 10/20/04 10/26/04 11/03/04 11/09/04 11/23/04 12/01/04 12/07/04 12/15/04 12/21/04 12/28/04 01/04/05 01/11/05 01/12/05 11:55 14:18 9:44 11:10 11:10 10:47 9:45 12:18 11:26 9:42 10:45 10:38 9:45 9:21 10:59 10:05 10:22 9:28 10:55 9:53 10:03 9:42 11:33 11:08 10:05 11:28 10:50 10:02 11:00 15:01 13:40 11:30 11:10 11:25 13:00 11:38 11:20 11:45 11:56 12:05 13:40 67 67 66 73 64 66 79 72 67 74 69 68 72 70 69 70 70 65 54 55 58 62 56 53 52 41 49 38 36 35 43 42 43 8.11 8.02 8.07 7.94 8.14 8.71 7.91 7.93 7.81 7.74 7.95 8.16 8.05 7.93 8.06 7.75 7.76 7.66 8.00 8.01 8.12 7.93 7.29 8.57 7.89 8.89 6.46 7.61 7.37 10.13 13.44 11.28 11.01 11.01 9.95 9.23 16.07 13.16 15.01 14.61 12.71 9.96 9.30 6.15 4.40 2.78 0.84 0.27 0.12 0.15 0.63 3.29 2.41 1.59 0.97 0.53 0.30 8.33 6.90 8.15 8.87 8.35 4.34 1.74 8.32 9.18 8.16 8.70 8.86 4.30 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-134 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 01/12/05 01/19/05 01/25/05 02/02/05 02/08/05 02/16/05 02/22/05 03/02/05 03/08/05 03/15/05 03/22/05 03/29/05 04/05/05 04/12/05 04/20/05 04/26/05 05/03/05 05/11/05 05/18/05 05/25/05 06/01/05 06/08/05 06/15/05 06/22/05 06/29/05 07/05/05 07/12/05 07/19/05 10/24/05 10/31/05 11/07/05 11/14/05 11/21/05 11/28/05 12/05/05 12/27/05 01/03/06 01/09/06 01/17/06 01/23/06 01/31/06 15:18 12:25 13:05 11:49 11:12 12:55 11:42 10:56 11:50 11:06 11:36 12:55 10:20 13:15 10:33 10:13 10:33 10:40 10:50 9:57 9:55 11:27 9:38 12:04 10:30 11:45 11:15 11:43 13:03 12:25 12:45 12:17 16:34 13:28 12:45 13:15 16:45 13:59 13:13 12:49 12:57 43 37 39 31 39 42 40 36 41 38 42 52 57 59 65 54 50 72 63 63 66 76 68 73 77 74 71 77 50 52 54 48 44 50 32 39 44 41 38 39 41 7.39 7.67 7.91 7.85 7.6 7.61 7.77 7.77 7.78 7.49 6.81 8.09 7.99 8.14 8.07 8.38 8.23 7.91 7.92 7.92 7.93 7.95 7.74 8.01 7.99 7.95 8.03 7.76 8.1 7.91 7.87 7.90 7.91 7.7 8.06 7.73 8.05 7.93 7.86 7.90 7.91 4.73 8.75 8.90 7.71 7.21 8.21 8.77 8.55 7.96 7.60 6.70 8.32 7.57 7.49 7.55 7.42 6.63 5.67 6.63 6.62 5.87 4.55 8.43 6.91 4.61 2.78 1.36 0.77 2.22 1.16 2.27 1.59 2.57 2.22 3.53 3.39 4.55 4.15 4.42 5.76 7.74 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-135 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 02/06/06 02/14/06 02/22/06 02/27/06 03/06/06 03/14/06 03/20/06 03/27/06 04/03/06 04/10/06 04/24/06 05/01/06 05/08/06 05/15/06 05/22/06 06/01/06 06/05/06 06/13/06 06/19/06 06/27/06 07/05/06 07/13/06 07/18/06 07/25/06 08/01/06 08/07/06 08/14/06 08/22/06 08/30/06 09/05/06 09/12/06 09/18/06 09/25/06 10/03/06 10/10/06 10/16/06 10/23/06 10/31/06 11/08/06 11/14/06 11/20/06 14:20 14:23 14:00 12:46 14:04 15:16 12:45 13:16 14:11 13:23 13:20 13:07 11:42 11:49 12:52 12:51 14:00 13:30 13:05 11:45 12:13 12:27 13:28 13:39 13:21 13:10 12:55 12:55 13:38 12:34 12:35 13:16 11:38 12:12 12:18 13:13 12:53 12:22 12:52 13:42 15:00 36 39 36 40 40 45 42 43 47 53 60 55 59 52 61 65 65 66 71 69 72 74 80 79 84 76 74 70 70 66 70 67 69 67 59 48 45 49 52 45 43 7.79 8.10 7.69 8.11 8.04 7.71 7.78 7.89 7.64 7.50 7.98 7.85 7.94 7.9 8.16 7.23 7.69 8.07 7.88 8.08 7.75 7.61 7.94 7.96 7.92 7.91 7.92 7.8 7.89 7.74 7.78 7.97 7.87 7.84 7.84 7.77 7.65 7.63 7.78 7.72 7.96 7.28 6.40 6.75 5.46 4.90 12.37 11.85 11.16 10.31 11.23 12.74 11.77 12.24 11.69 10.85 10.92 14.64 13.31 10.14 10.26 3.38 4.37 5.59 3.94 1.02 0.30 0.23 0.36 0.51 0.43 0.16 0.14 0.13 0.07 <0.07 0.07 0.44 0.33 0.34 0.37 3.81 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-136 Table E-1. Continued Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 11/27/06 12/05/06 12/12/06 12/19/06 12/27/06 01/02/07 01/08/07 01/16/07 01/22/07 01/29/07 02/26/07 03/06/07 03/13/07 03/20/07 03/27/07 04/10/07 04/16/07 04/24/07 05/01/07 05/09/07 05/29/07 06/12/07 06/19/07 07/03/07 07/26/07 08/02/07 08/09/07 10/24/07 10/31/07 11/06/07 11/14/07 11/27/07 12/03/07 12/19/07 12/26/07 01/16/08 02/06/08 02/13/08 02/19/08 03/19/08 03/26/08 12:40 14:16 14:08 12:18 12:51 12:41 12:43 11:13 16:00 13:20 12:32 13:42 12:23 10:43 15:00 11:12 12:22 12:50 10:45 12:09 12:54 11:43 11:57 12:30 11:10 10:57 9:47 11:30 13:05 14:45 12:35 14:32 14:20 16:00 13:55 18:20 14:25 18:02 14:09 11:27 13:41 54 38 48 43 42 43 43 36 39 35 34 36 44 46 63 45 51 65 66 69 68 71 76 73 73 76 81 54 52 45 53 40 37 35 39 34 41 47 7.69 7.92 7.68 7.89 7.78 7.85 7.76 7.58 7.95 8.47 7.84 7.82 7.82 7.93 8.12 8.14 8.39 8.2 8.11 8.21 7.81 8.16 8.08 8.04 7.85 7.80 7.88 7.97 7.75 7.68 7.51 7.80 8.21 7.90 7.85 8.18 8.17 2.31 8.49 7.80 7.58 10.54 10.81 11.41 10.28 11.78 11.94 4.49 8.92 10.75 8.61 8.88 9.55 11.27 10.12 9.13 8.67 7.22 5.10 2.01 3.77 0.19 0.12 0.08 <0.07 <0.07 <0.07 <0.07 1.81 2.36 8.81 11.22 13.84 4.90 12.14 12.07 9.02 13.31 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-137 Table E-1. Concluded Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 04/09/08 04/23/08 04/30/08 06/17/08 06/25/08 07/01/08 14:15 12:20 12:10 11:20 11:58 11:45 63 54 69 8.01 8.59 8.52 7.93 13.79 13.20 11.84 14.63 14.71 14.72 Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) A-138 Table E-2. Nitrate-N Samples Concentrations (WY 1993-2008) for Friends Creek (Station 102) Date Time (CST) Water temp (F) 04/16/93 05/07/93 05/14/93 06/04/93 06/15/93 06/21/93 06/29/93 07/07/93 07/15/93 07/28/93 08/10/93 08/17/93 08/23/93 09/01/93 09/10/93 09/15/93 09/16/93 09/24/93 09/28/93 09/29/93 10/06/93 10/12/93 10/20/93 10/27/93 11/05/93 11/09/93 11/16/93 11/24/93 12/01/93 12/08/93 12/16/93 12/27/93 01/10/94 01/28/94 02/03/94 15:55 11:48 12:32 14:45 15:30 14:27 13:58 10:22 15:50 13:14 12:29 14:30 15:17 10:44 11:19 12:41 15:43 14:41 15:28 10:10 10:55 14:56 13:07 10:32 11:13 15:12 10:12 9:45 14:31 15:14 14:53 14:51 14:19 15:55 14:10 - pH Nitrate-N (mg/L) Collection method* - 8.15 11.40 10.17 9.00 11.30 10.32 9.35 10.36 8.67 8.34 7.73 7.64 6.34 5.79 6.86 6.41 6.32 7.03 6.54 0.22 6.98 6.04 5.45 6.88 6.17 6.54 6.88 7.80 7.92 7.28 7.48 6.91 6.85 4.58 7.05 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-139 Table E-2. Continued Date Time (CST) Water temp (F) 02/10/94 02/17/94 02/24/94 03/01/94 03/08/94 03/18/94 03/23/94 03/28/94 04/04/94 04/11/94 04/13/94 04/18/94 04/25/94 04/28/94 04/29/94 05/02/94 05/09/94 05/17/94 05/24/94 05/31/94 06/02/94 06/06/94 06/13/94 06/20/94 06/27/94 07/06/94 07/12/94 07/26/94 08/01/94 09/07/94 10/12/94 10/18/94 10/25/94 11/01/94 11/06/94 11/07/94 11/14/94 14:25 13:58 10:20 14:45 10:44 10:13 14:31 10:41 13:39 13:37 10:50 12:57 10:36 13:50 13:11 15:54 10:13 13:03 15:05 14:52 14:42 14:41 9:47 12:10 8:14 8:57 13:10 8:59 10:34 9:33 13:00 13:39 13:49 16:13 13:24 14:20 13:17 - pH Nitrate-N (mg/L) Collection method* - 6.75 5.15 6.61 6.71 8.24 7.36 7.50 7.04 6.68 7.62 7.33 8.36 8.89 7.69 10.39 10.32 10.75 10.60 10.89 10.51 10.57 10.05 12.54 10.15 9.32 7.01 7.70 0.22 0.80 0.40 0.24 0.31 0.51 1.24 0.86 4.53 3.99 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-140 Table E-2. Continued Date Time (CST) Water temp (F) 11/21/94 11/28/94 12/05/94 12/07/94 12/08/94 12/13/94 12/21/94 01/03/95 01/12/95 01/17/95 01/24/95 02/01/95 02/08/95 02/16/95 02/22/95 02/28/95 03/07/95 03/08/95 03/16/95 03/22/95 03/28/95 04/05/95 04/12/95 04/27/95 05/02/95 05/09/95 05/20/95 05/22/95 05/26/95 05/31/95 06/05/95 06/12/95 06/21/95 06/27/95 07/11/95 07/18/95 07/25/95 13:13 13:43 12:38 14:47 14:38 12:29 11:13 12:56 10:47 13:30 10:06 12:49 12:49 12:47 13:46 11:21 13:15 12:37 13:20 13:38 13:34 11:06 14:41 14:52 11:36 10:07 15:09 11:05 11:05 10:42 14:12 11:45 14:04 13:47 10:26 11:09 13:01 - pH Nitrate-N (mg/L) Collection method* - 3.52 5.11 4.91 4.50 6.89 6.99 6.31 6.54 5.19 8.34 8.00 8.10 8.40 7.69 7.31 6.82 8.01 8.96 8.75 8.52 8.05 8.31 7.74 9.08 8.91 13.37 8.60 9.43 9.52 10.90 11.70 12.36 11.52 10.46 8.22 5.60 3.64 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-141 Table E-2. Continued Date Time (CST) Water temp (F) 08/02/95 08/08/95 08/15/95 08/22/95 10/27/95 11/01/95 11/07/95 11/15/95 11/20/95 11/28/95 12/05/95 12/14/95 12/18/95 12/28/95 01/09/96 01/17/96 01/23/96 01/30/96 02/07/96 02/08/96 02/14/96 02/22/96 02/27/96 03/05/96 03/11/96 03/18/96 03/27/96 04/02/96 04/09/96 04/15/96 04/23/96 04/30/96 05/07/96 05/08/96 05/08/96 05/09/96 05/14/96 10:55 14:55 14:19 12:00 15:23 14:41 13:09 10:44 13:44 11:48 12:57 11:13 14:20 13:04 13:54 12:47 11:05 10:47 12:45 11:41 11:30 9:53 11:20 13:20 15:15 12:40 11:35 12:39 11:25 13:43 12:54 15:10 14:37 13:53 18:16 15:08 14:15 - pH Nitrate-N (mg/L) Collection method* - 1.81 3.86 2.10 0.63 0.73 0.57 0.70 3.96 3.68 2.70 1.49 0.76 1.00 4.34 3.11 3.19 8.52 8.86 8.51 8.14 6.55 5.94 5.23 6.70 7.94 7.36 7.34 10.72 9.43 8.65 12.74 13.47 12.74 8.20 7.69 13.34 13.96 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-142 Table E-2. Continued Date Time (CST) Water temp (F) 05/21/96 05/28/96 06/04/96 06/10/96 06/18/96 06/25/96 07/01/96 07/10/96 07/22/96 07/30/96 08/05/96 08/13/96 08/20/96 08/27/96 10/16/96 10/22/96 11/08/96 11/13/96 11/18/96 12/03/96 12/10/96 12/18/96 12/27/96 01/03/97 01/08/97 01/22/97 02/04/97 02/05/97 02/18/97 02/21/97 02/27/97 03/04/97 03/11/97 03/19/97 03/25/97 04/01/97 04/08/97 13:35 15:50 14:56 12:43 15:56 13:55 15:28 14:40 15:15 10:54 14:05 9:51 13:57 10:30 14:38 12:50 11:21 13:40 13:18 10:25 11:35 11:20 13:15 15:47 14:40 14:24 14:12 14:45 13:56 14:58 12:18 14:23 14:10 14:15 10:18 12:56 15:26 - pH Nitrate-N (mg/L) Collection method* - 14.19 10.60 12.82 7.15 14.58 13.64 13.77 12.03 8.68 7.79 4.48 1.57 0.33 0.15 0.88 0.56 0.45 0.13 0.11 3.75 6.74 5.82 8.22 5.37 7.71 4.54 5.67 6.27 7.88 9.22 6.65 10.92 11.58 11.81 11.45 10.84 10.63 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-143 Table E-2. Continued Date Time (CST) Water temp (F) 04/15/97 04/22/97 05/01/97 05/06/97 05/13/97 05/20/97 05/28/97 06/03/97 06/09/97 06/17/97 06/25/97 07/01/97 07/08/97 07/15/97 07/22/97 07/28/97 08/05/97 08/12/97 08/19/97 08/26/97 09/03/97 09/10/97 09/12/97 09/24/97 10/01/97 10/07/97 10/15/97 10/21/97 10/28/97 11/04/97 11/12/97 11/18/97 11/25/97 12/04/97 12/09/97 12/16/97 12/22/97 10:56 10:39 15:10 13:24 12:17 13:10 14:45 14:39 13:10 13:10 9:37 11:07 14:12 13:50 11:52 14:40 13:20 13:27 14:12 15:00 14:15 13:53 13:02 14:18 14:15 13:49 13:44 15:05 15:40 14:42 14:33 14:03 14:54 14:25 11:25 13:43 13:41 - pH Nitrate-N (mg/L) Collection method* - 10.31 10.20 10.49 12.30 11.56 11.99 13.38 12.60 14.78 14.22 13.09 9.35 11.95 9.20 4.15 3.14 0.54 0.33 1.95 0.56 0.23 4.86 2.81 3.08 2.61 0.98 0.11 0.09 <0.04 0.16 3.93 4.25 3.51 9.95 9.12 8.95 8.88 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-144 Table E-2. Continued Date Time (CST) Water temp (F) 12/29/97 01/06/98 01/14/98 01/23/98 01/27/98 01/29/98 02/03/98 02/10/98 02/17/98 02/24/98 03/03/98 03/17/98 03/19/98 03/24/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/05/98 05/12/98 05/19/98 05/27/98 06/03/98 06/09/98 06/17/98 06/22/98 07/07/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 08/26/98 09/02/98 09/09/98 09/16/98 13:50 14:07 14:14 10:45 14:13 13:56 15:15 13:55 14:20 12:37 15:20 14:36 15:06 13:58 14:35 13:54 13:40 14:40 14:27 13:55 14:06 14:13 13:49 14:30 14:36 13:17 15:01 15:26 14:25 13:40 12:23 14:02 11:29 14:32 11:49 13:33 14:17 - pH Nitrate-N (mg/L) Collection method* - 9.86 9.66 11.24 10.26 9.90 9.77 10.32 9.85 9.74 11.08 10.52 9.65 11.03 10.95 11.19 12.93 10.71 12.42 10.72 12.99 13.00 13.27 14.73 13.12 14.04 10.30 10.45 12.10 7.80 4.26 2.19 1.32 0.70 0.54 0.94 1.11 0.96 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-145 Table E-2. Continued Date Time (CST) Water temp (F) 09/22/98 09/30/98 10/06/98 10/14/98 10/20/98 10/29/98 11/04/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 01/19/99 01/26/99 02/03/99 02/09/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/24/99 03/30/99 04/06/99 04/13/99 04/20/99 04/27/99 05/05/99 05/11/99 05/18/99 05/25/99 06/01/99 06/03/99 06/09/99 06/15/99 07/01/99 07/08/99 14:58 15:19 14:05 13:58 13:09 11:44 14:11 13:54 13:46 13:27 13:16 13:42 14:20 11:42 12:03 13:57 14:32 13:20 12:57 13:34 14:12 15:11 14:15 14:24 14:27 14:29 14:46 14:50 14:26 13:47 13:47 11:44 14:35 10:21 14:20 11:50 12:50 - pH Nitrate-N (mg/L) Collection method* - 1.05 1.26 1.17 0.98 0.46 0.23 0.65 3.83 3.13 0.52 <0.09 <0.09 0.72 11.30 11.37 11.74 12.47 11.98 11.38 11.41 11.54 11.85 11.41 13.32 13.32 15.35 14.80 14.63 14.83 14.70 14.78 14.20 16.82 15.22 13.46 13.62 13.55 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-146 Table E-2. Continued Date Time (CST) Water temp (F) 07/13/99 07/21/99 07/27/99 08/03/99 08/11/99 08/17/99 08/25/99 08/31/99 09/07/99 09/15/99 09/22/99 09/28/99 10/05/99 10/13/99 10/18/99 10/26/99 11/01/99 11/08/99 11/15/99 11/22/99 11/29/99 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 01/25/00 02/01/00 02/09/00 02/15/00 02/22/00 02/29/00 03/07/00 03/14/00 03/21/00 03/28/00 14:30 13:15 14:05 15:11 13:12 12:56 10:43 14:07 13:55 14:33 13:45 14:15 13:46 10:14 14:21 13:45 13:54 13:09 13:04 12:12 13:13 13:26 12:53 13:49 13:08 12:49 12:34 12:20 11:46 13:37 11:53 14:05 12:50 12:47 12:15 14:19 12:11 51 63 58 50 52 42 45 45 39 43 48 35 33 33 42 39 50 50 57 47 49 47 pH Nitrate-N (mg/L) Collection method* - 11.93 6.84 2.67 0.78 1.05 5.25 1.35 0.77 0.96 1.76 1.79 0.75 1.27 1.89 4.08 4.00 1.19 0.56 0.20 0.48 0.24 1.57 2.06 3.68 3.58 3.49 2.84 2.77 2.40 2.49 5.29 9.28 8.71 8.39 8.83 10.59 9.25 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-147 Table E-2. Continued Date Time (CST) Water temp (F) 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/30/00 06/06/00 06/13/00 06/21/00 06/29/00 07/05/00 07/12/00 07/19/00 07/26/00 08/02/00 08/08/00 08/15/00 08/22/00 08/29/00 09/05/00 09/13/00 09/19/00 09/26/00 10/03/00 10/05/00 10/10/00 10/17/00 10/24/00 10/30/00 11/08/00 11/14/00 11/20/00 11/28/00 12/05/00 12:40 12:25 13:15 13:52 13:49 13:25 13:10 10:46 12:48 13:43 14:33 12:50 13:04 12:35 12:22 13:15 12:33 12:14 11:46 13:50 12:45 15:50 14:05 10:31 13:37 14:48 13:08 13:30 14:45 14:33 14:25 15:40 12:45 16:10 15:02 15:06 15:30 48 50 52 56 62 71 62 68 67 63 67 73 70 70 72 77 75 80 73 79 73 67 75 58 68 60 51 60 64 58 51 38 41 33 pH Nitrate-N (mg/L) Collection method* - 9.03 8.40 9.88 11.98 10.45 8.90 12.55 10.81 13.85 13.68 11.93 8.74 12.89 6.37 10.08 11.02 9.78 6.32 4.75 2.59 0.71 0.61 1.04 1.97 2.25 7.89 0.21 6.43 10.53 8.85 7.08 5.79 6.89 11.14 11.11 10.12 10.25 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-148 Table E-2. Continued Date Time (CST) Water temp (F) 12/14/00 12/18/00 12/26/00 01/02/01 01/10/01 01/16/01 01/23/01 01/31/01 02/06/01 02/14/01 02/20/01 02/24/01 03/06/01 03/15/01 03/21/01 03/27/01 04/03/01 04/10/01 04/17/01 04/24/01 05/01/01 05/09/01 05/14/01 05/21/01 05/30/01 06/05/01 06/14/01 06/20/01 07/02/01 07/10/01 07/18/01 07/24/01 08/01/01 08/08/01 08/16/01 08/22/01 08/29/01 14:40 13:32 12:05 14:10 13:48 16:30 15:22 15:27 14:46 15:55 15:50 14:32 14:25 12:22 16:55 16:20 14:54 14:38 15:05 13:42 14:42 16:39 12:51 14:14 14:46 11:43 9:30 11:11 13:48 14:03 10:12 9:44 11:55 12:48 12:54 13:12 12:15 34 32 32 34 35 35 35 43 42 43 41 39 48 45 55 65 53 61 70 69 61 66 62 60 71 71 70 82 73 82 82 83 70 80 76 pH 7.86 8.08 8.1 8.07 7.75 8.03 7.24 8.32 8.37 7.97 7.98 8.40 A-149 Nitrate-N (mg/L) Collection method* 10.93 10.54 11.11 9.77 9.19 9.22 9.76 7.21 10.27 11.15 11.73 5.67 11.95 11.83 12.17 11.97 11.53 10.60 10.94 9.99 9.86 9.15 9.61 9.66 9.20 11.37 12.68 11.07 8.24 4.95 1.84 0.74 0.49 0.64 0.82 1.26 1.46 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 09/06/01 09/12/01 09/19/01 09/26/01 10/04/01 10/11/01 10/17/01 10/24/01 11/01/01 11/07/01 11/14/01 11/20/01 11/27/01 12/04/01 12/11/01 12/20/01 12/26/01 01/02/02 01/08/02 01/15/02 01/22/02 01/29/02 01/31/02 01/31/02 02/01/02 02/04/02 02/13/02 02/19/02 02/20/02 02/20/02 02/21/02 02/22/02 02/25/02 03/05/02 03/12/02 03/19/02 03/27/02 12:19 11:35 12:08 11:19 11:48 12:40 12:36 13:22 14:22 13:37 10:02 8:19 14:00 14:15 13:30 9:30 14:11 13:46 14:36 14:47 13:08 12:36 8:26 18:27 8:18 14:09 12:55 14:17 7:41 18:10 7:35 13:24 12:55 12:31 14:14 13:48 13:34 77 71 67 60 65 66 53 63 57 56 54 43 47 52 43 43 36 35 37 38 40 46 39 39 44 44 47 46 42 43 46 42 47 47 45 pH 8.41 8.05 8.33 7.76 8.48 8.09 8.15 8.10 8.17 8.18 8.13 7.83 7.90 8.27 A-150 Nitrate-N (mg/L) Collection method* 1.49 1.72 1.81 1.85 1.86 1.66 8.51 2.09 8.51 8.08 8.10 7.43 7.29 9.43 9.28 10.74 10.41 10.45 10.14 9.82 9.82 9.47 10.34 11.87 11.87 12.50 11.63 9.91 11.73 11.30 11.30 12.09 12.19 12.57 12.38 11.92 10.93 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 03/28/02 03/29/02 03/29/02 03/30/02 04/02/02 04/09/02 04/16/02 04/21/02 04/23/02 04/24/02 04/25/02 04/27/02 04/28/02 04/28/02 04/29/02 04/30/02 05/01/02 05/06/02 05/07/02 05/07/02 05/09/02 05/09/02 05/10/02 05/12/02 05/12/02 05/13/02 05/14/02 05/21/02 05/28/02 06/04/02 06/11/02 06/11/02 06/11/02 06/12/02 06/12/02 06/13/02 06/13/02 17:23 10:02 17:05 7:21 12:57 7:36 11:23 9:21 12:51 16:59 8:12 14:36 7:30 15:39 6:23 13:13 16:55 12:16 12:18 18:51 7:14 13:05 7:28 10:05 17:11 9:52 12:44 8:56 12:37 12:59 10:00 19:05 20:43 7:54 18:11 8:23 16:20 46 46 46 43 47 49 67 51 52 56 51 50 51 50 48 54 55 59 60 59 59 60 53 60 62 54 58 52 65 72 67 67 67 67 70 64 67 pH 8.21 7.61 7.35 8.15 8.14 - A-151 Nitrate-N (mg/L) Collection method* 12.12 12.79 12.70 12.68 12.35 12.37 11.79 10.86 13.32 12.82 12.98 10.28 13.98 15.43 15.84 15.28 14.71 13.93 14.55 15.64 9.75 11.39 14.75 5.92 6.82 8.65 11.36 14.54 14.67 14.68 14.08 6.52 6.55 5.60 9.08 10.83 9.37 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 06/14/02 06/18/02 06/25/02 07/02/02 07/09/02 07/16/02 07/30/02 08/06/02 08/14/02 08/19/02 08/23/02 08/27/02 09/03/02 09/10/02 09/17/02 09/24/02 10/01/02 10/08/02 10/15/02 10/22/02 10/28/02 11/06/02 11/12/02 11/19/02 11/25/02 12/03/02 12/10/02 12/17/02 12/23/02 12/30/02 01/07/03 01/14/03 01/22/03 01/28/03 02/04/03 02/10/03 02/18/03 6:33 11:39 12:41 12:31 11:30 9:14 11:28 12:44 11:56 10:35 5:45 11:00 11:27 10:36 11:20 12:15 11:27 11:44 11:35 11:47 12:11 12:13 12:50 12:33 13:20 12:50 12:29 12:26 12:14 12:30 13:37 11:44 11:37 11:54 12:59 12:26 11:57 63 65 73 77 80 72 80 81 70 70 75 77 79 70 63 73 57 54 50 52 48 50 49 39 35 39 37 37 42 35 33 32 37 33 35 35 pH 8.23 8.27 8.05 7.67 8.29 8.18 7.97 7.72 7.69 7.58 7.36 7.88 7.91 7.95 7.43 7.80 - A-152 Nitrate-N (mg/L) Collection method* 10.69 14.07 14.28 12.52 9.71 7.14 0.72 0.78 1.78 1.54 1.44 4.22 2.05 0.78 1.56 1.67 2.12 1.84 1.55 1.44 0.91 0.90 <0.06 0.07 0.07 <0.06 0.15 <0.06 5.33 4.63 5.65 6.57 6.90 6.69 4.68 5.58 4.04 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 02/25/03 03/04/03 03/11/03 03/18/03 03/20/03 03/20/03 03/21/03 03/25/03 03/31/03 04/07/03 04/15/03 04/22/03 04/29/03 05/04/03 05/05/03 05/05/03 05/06/03 05/06/03 05/14/03 05/20/03 05/27/03 06/03/03 06/10/03 06/11/03 06/12/03 06/12/03 06/13/03 06/17/03 06/24/03 07/01/03 07/08/03 07/09/03 07/10/03 07/10/03 07/15/03 07/22/03 07/29/03 13:47 12:55 12:35 12:43 18:10 21:44 7:41 12:45 12:53 13:06 12:11 10:31 11:57 20:00 6:09 14:25 6:19 11:00 10:20 12:31 12:50 12:35 11:00 23:20 8:25 16:10 6:38 13:30 11:54 12:35 12:03 21:15 7:28 13:50 9:43 9:34 9:40 35 34 37 57 50 50 48 56 50 44 65 52 63 59 59 59 64 62 55 69 68 64 66 75 75 84 75 70 72 73 74 73 pH 7.59 7.95 8.03 7.91 8.11 8.18 8.2 8.19 8.28 8.22 A-153 Nitrate-N (mg/L) Collection method* 6.01 5.17 4.96 6.17 7.91 7.89 8.06 7.33 7.19 7.30 6.95 6.94 6.18 4.83 9.68 13.74 12.52 11.89 12.21 11.19 10.04 11.34 9.10 8.92 6.53 8.52 11.31 12.31 11.51 9.85 7.03 5.02 5.97 7.44 9.68 6.46 3.80 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 08/05/03 08/12/03 08/19/03 08/26/03 08/31/03 09/01/03 09/01/03 09/02/03 09/10/03 09/16/03 09/23/03 09/30/03 10/07/03 10/14/03 10/21/03 10/28/03 11/05/03 11/10/03 11/18/03 11/21/03 12/02/03 12/09/03 12/17/03 12/22/03 12/30/03 01/06/04 01/13/04 01/21/04 01/28/04 02/04/04 02/10/04 02/17/04 02/24/04 03/03/04 03/09/04 03/16/04 03/23/04 9:16 9:18 10:02 9:46 12:56 5:50 14:22 9:20 12:17 10:41 12:40 11:03 12:58 9:26 12:46 10:03 13:15 10:00 13:25 10:45 10:42 11:55 12:45 11:28 13:00 14:30 12:10 11:05 11:10 10:10 11:35 15:40 12:45 14:30 13:00 10:35 12:50 72 71 75 79 66 66 66 71 68 66 55 65 57 62 50 53 42 57 42 42 47 50 pH 7.86 7.94 8.37 8.15 8.06 7.38 7.06 7.26 7.59 8.1 8.277 7.85 8.28 7.81 7.90 8.35 A-154 Nitrate-N (mg/L) Collection method* 1.39 0.99 1.22 0.96 0.75 0.88 1.41 4.02 2.59 1.17 0.92 0.08 0.26 0.86 0.11 <0.07 0.15 0.12 4.72 7.97 8.84 8.41 8.44 8.20 9.07 10.59 9.84 9.33 9.92 9.39 9.00 8.38 7.95 7.62 10.44 9.60 9.32 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 03/29/04 04/07/04 04/15/04 04/19/04 04/27/04 05/04/04 05/11/04 05/18/04 05/25/04 06/02/04 06/07/04 06/14/04 06/21/04 06/28/04 07/13/04 07/20/04 07/27/04 08/04/04 08/10/04 08/17/04 08/24/04 08/26/04 08/31/04 09/07/04 09/14/04 09/22/04 09/28/04 10/05/04 10/12/04 10/20/04 10/26/04 11/03/04 11/09/04 11/16/04 11/23/04 12/01/04 12/07/04 12:25 15:24 10:40 13:10 10:40 11:26 9:05 11:36 10:44 10:15 10:15 10:08 9:10 10:05 9:52 9:22 11:09 10:15 9:50 9:00 10:45 9:00 10:25 10:05 11:45 9:36 9:51 10:02 9:14 10:07 15:50 12:59 10:33 11:12 12:02 12:30 12:10 62 67 70 68 64 67 77 72 69 77 67 71 73 74 69 72 68 61 54 55 58 61 57 53 52 52 45 49 pH 7.98 7.91 7.56 8.19 8.33 8.69 8.05 7.91 7.69 7.44 8.00 8.38 8.28 8.26 8.45 8.90 8.04 7.33 7.86 7.54 8.6 7.58 8.04 7.68 A-155 Nitrate-N (mg/L) Collection method* 10.49 10.99 10.58 10.07 9.72 9.24 7.40 13.84 9.95 13.52 13.17 13.06 12.35 12.23 9.44 8.69 5.87 2.73 1.03 0.57 0.47 1.38 5.60 6.36 5.85 4.98 4.91 4.34 3.32 8.01 6.82 6.82 7.49 7.64 7.40 6.10 3.03 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 12/15/04 12/21/04 12/28/04 01/04/05 01/11/05 01/12/05 01/12/05 01/19/05 01/25/05 02/02/05 02/08/05 02/16/05 02/22/05 03/02/05 03/08/05 03/15/05 03/22/05 03/29/05 04/05/05 04/12/05 04/20/05 04/26/05 05/03/05 05/11/05 05/18/05 05/25/05 06/01/05 06/08/05 06/15/05 06/22/05 06/29/05 07/05/05 07/12/05 07/19/05 10/24/05 10/31/05 11/07/05 10:57 10:34 10:38 11:00 11:16 10:08 12:15 11:31 11:52 10:51 10:24 12:09 10:38 11:43 10:56 10:22 10:55 10:30 9:39 9:40 9:35 9:31 9:35 9:58 9:54 10:34 9:05 9:35 11:08 10:02 8:43 10:00 9:15 10:00 9:45 10:36 11:04 40 37 35 44 43 43 43 37 40 35 41 42 40 37 41 38 42 52 55 58 65 53 47 72 65 65 69 76 72 77 78 75 70 79 49 52 53 pH 7.54 8.66 8.48 7.78 7.58 7.44 7.37 8.00 7.73 7.90 7.39 7.68 7.75 8.01 8.67 8.35 8.15 8.09 8.05 8.09 8.11 8.09 8.08 8.13 8.04 8.12 8.06 8.13 8.05 7.78 8.1 7.98 7.73 7.73 7.97 7.97 7.72 A-156 Nitrate-N (mg/L) Collection method* 7.71 7.95 8.49 9.20 8.35 6.03 5.78 8.10 8.73 8.51 9.14 8.66 8.59 8.57 8.41 8.38 7.99 8.96 8.20 8.11 7.50 7.99 7.74 6.41 6.33 6.03 5.50 4.46 8.00 5.34 2.60 1.03 1.08 0.19 1.43 1.58 1.08 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 11/14/05 11/21/05 11/28/05 12/05/05 12/12/05 12/20/05 12/27/05 01/03/06 01/09/06 01/17/06 01/23/06 01/31/06 02/06/06 02/14/06 02/22/06 02/27/06 03/06/06 03/14/06 03/20/06 03/27/06 04/03/06 04/06/06 04/10/06 04/19/06 04/19/06 04/24/06 05/01/06 05/08/06 05/15/06 05/22/06 06/01/06 06/05/06 06/13/06 06/19/06 06/27/06 07/05/06 07/10/06 10:45 14:29 10:53 10:42 12:57 12:15 10:35 14:09 11:07 10:55 10:21 10:27 10:30 11:59 10:26 10:16 10:26 13:48 10:09 10:31 10:00 14:25 10:29 10:08 12:13 9:55 9:58 9:11 9:40 9:42 8:58 9:53 9:02 9:53 9:26 9:42 9:41 46 44 50 31 31 32 45 40 40 37 42 33 36 36 38 39 44 41 43 48 51 50 59 59 57 54 59 52 58 63 65 63 71 67 71 73 pH 7.82 7.96 7.88 8.32 7.91 7.97 8.08 8.04 8.16 8.05 7.71 8.00 7.85 8.13 8.07 7.98 7.95 7.67 7.61 7.90 7.86 7.83 7.52 7.53 7.97 7.88 7.91 8.05 7.94 7.80 7.81 8.22 8.10 8.14 8.01 8.19 A-157 Nitrate-N (mg/L) Collection method* 0.65 4.17 2.66 5.83 5.62 5.56 6.28 6.72 6.67 7.54 6.90 7.70 7.32 7.00 7.24 6.78 6.74 11.54 9.99 9.32 9.81 10.04 12.36 11.86 12.02 11.94 12.81 11.59 12.88 12.01 14.67 12.84 11.33 9.35 7.37 5.20 3.55 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 07/13/06 07/18/06 07/25/06 08/01/06 08/07/06 08/14/06 08/22/06 08/30/06 09/05/06 09/12/06 09/18/06 09/25/06 10/03/06 10/10/06 10/16/06 10/23/06 10/31/06 11/08/06 11/14/06 11/20/06 11/27/06 12/05/06 12/12/06 12/19/06 12/27/06 01/02/07 01/08/07 01/16/07 01/22/07 01/29/07 02/21/07 02/26/07 03/06/07 03/13/07 03/20/07 03/27/07 04/02/07 10:55 10:13 9:56 9:30 10:46 10:46 11:10 10:30 10:00 10:06 10:46 9:40 9:35 14:17 11:05 10:29 9:51 10:30 11:59 12:30 11:03 11:02 11:05 10:33 10:08 10:38 11:05 10:38 14:20 11:46 11:26 10:42 11:36 10:43 8:58 14:28 12:46 73 79 75 77 75 74 71 68 65 69 67 69 69 60 49 47 54 55 48 46 54 39 43 43 41 43 43 37 37 33 35 33 36 55 44 60 56 pH 7.80 8.03 7.9 7.96 7.93 8.13 7.84 7.97 8.4 7.99 8.14 8.43 8.06 8.25 8.15 8.15 8.07 8.15 8.07 8.17 8.26 7.95 7.65 8.03 7.86 7.87 7.85 7.86 8.1 8.19 8.39 7.64 7.77 8.06 8.15 8.16 7.78 A-158 Nitrate-N (mg/L) Collection method* 6.17 5.45 4.39 6.29 5.68 4.89 5.83 6.77 6.51 5.49 5.58 6.52 5.41 4.45 5.25 7.27 7.09 6.75 7.25 7.84 7.29 8.94 8.03 8.44 8.47 8.80 9.16 7.30 9.31 9.44 8.41 2.83 5.98 8.18 7.89 8.44 9.84 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Continued Date Time (CST) Water temp (F) 04/10/07 04/16/07 04/24/07 05/01/07 05/09/07 05/15/07 05/21/07 05/29/07 06/12/07 06/19/07 06/26/07 07/03/07 07/26/07 08/02/07 08/09/07 08/21/07 08/29/07 09/11/07 09/18/07 09/20/07 09/25/07 10/03/07 10/09/07 10/17/07 10/24/07 10/31/07 11/06/07 11/14/07 11/27/07 12/03/07 12/19/07 12/26/07 01/08/08 01/16/08 01/22/08 02/05/08 02/06/08 9:36 13:31 10:40 9:05 10:38 12:20 11:40 11:10 9:15 8:55 8:03 10:00 8:46 8:25 8:24 9:34 8:49 10:32 12:10 9:50 12:59 9:50 10:15 9:15 10:35 10:58 12:30 11:16 12:15 13:25 11:35 15:00 12:24 13:40 14:45 15:35 10:15 44 53 63 64 68 71 66 72 73 75 74 73 72 74 78 75 74 67 69 71 70 63 64 58 52 51 43 53 41 38 33 35 32 - pH 8.17 8.26 8.27 8.14 8.27 8.3 8.4 8.39 8.27 8.23 8.12 8.13 7.93 7.52 7.77 7.64 7.78 7.84 8.31 8.03 8.13 7.82 8.10 7.99 8.38 7.87 8.52 7.72 8.33 7.90 8.32 7.86 8.7 - A-159 Nitrate-N (mg/L) Collection method* 9.67 9.72 9.28 10.36 9.55 9.10 9.65 9.29 7.35 5.07 9.92 9.20 0.73 0.24 0.36 0.46 0.40 0.88 0.93 0.42 0.23 0.56 1.34 1.49 1.57 1.03 0.89 <0.07 0.83 0.76 8.56 9.78 8.98 12.23 11.34 4.89 2.35 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-2. Concluded Date Time (CST) Water temp (F) 02/06/08 02/13/08 02/19/08 03/03/08 03/13/08 03/26/08 04/09/08 04/23/08 04/30/08 06/17/08 06/25/08 07/01/08 15:30 15:50 11:55 11:30 14:25 9:25 11:40 9:29 11:23 10:35 10:08 10:18 37 46 45 48 59 52 69 pH 8.64 7.92 8.09 8.52 7.75 8.42 8.12 8.20 Nitrate-N (mg/L) Collection method* 2.68 11.22 9.39 9.93 12.16 12.80 12.50 12.24 11.95 13.10 13.95 13.38 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) A-160 Table E-3. Nitrate-N Sample Concentrations (WY 1993-2008) for Goose Creek near De Land (Station 103) Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 04/16/93 05/07/93 05/14/93 06/04/93 06/16/93 06/22/93 06/29/93 07/06/93 07/15/93 07/28/93 08/10/93 08/17/93 08/23/93 08/31/93 09/10/93 09/14/93 09/15/93 09/16/93 09/24/93 09/29/93 10/06/93 10/12/93 10/20/93 10/21/93 10/27/93 11/05/93 11/09/93 11/15/93 11/24/93 12/01/93 12/03/93 12/10/93 12/16/93 12/28/93 01/12/94 01/21/94 02/03/94 02/15/94 02/22/94 02/28/94 03/07/94 16:40 12:28 13:10 15:23 10:56 9:35 13:11 15:08 11:25 14:47 11:28 15:12 15:58 14:39 10:25 14:45 14:18 11:06 9:46 14:50 14:08 12:23 11:15 13:54 11:24 10:16 14:01 15:13 11:44 13:48 14:55 11:12 12:55 14:18 12:29 12:51 13:07 14:26 13:57 14:30 14:41 - - 9.98 12.06 11.07 14.10 11.39 11.25 10.03 11.79 10.78 9.08 7.23 8.32 7.76 7.74 7.52 6.79 6.87 7.32 7.46 7.70 7.90 6.37 6.25 6.55 6.95 6.76 6.70 6.75 8.53 8.52 8.43 7.90 7.94 7.57 7.80 9.08 7.30 5.73 7.01 7.36 8.46 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-161 Table E-3. Continued Date Time (CST) Water temp (F) 03/17/94 03/23/94 03/28/94 04/04/94 04/11/94 04/12/94 04/13/94 04/18/94 04/25/94 04/29/94 05/03/94 05/09/94 05/16/94 05/24/94 06/03/94 06/06/94 06/13/94 06/20/94 06/27/94 07/06/94 07/12/94 07/26/94 08/01/94 09/07/94 10/18/94 10/25/94 11/01/94 11/06/94 11/07/94 11/07/94 11/14/94 11/21/94 11/28/94 12/05/94 12/07/94 12/08/94 12/08/94 12/08/94 12/09/94 12/09/94 12/09/94 12/10/94 12:52 13:23 12:07 12:53 13:07 18:46 13:32 13:35 13:58 12:25 13:13 12:47 12:48 13:50 12:54 13:33 14:50 11:33 11:15 10:49 11:55 9:47 9:59 8:45 12:55 12:37 16:45 15:26 13:22 13:33 13:50 12:23 14:18 13:33 16:17 12:38 12:38 15:15 0:15 6:15 15:15 0:15 - pH Nitrate-N (mg/L) Collection method* - 8.28 8.13 7.67 7.41 7.67 5.24 7.39 7.91 8.96 10.22 10.24 10.94 10.83 10.97 10.85 10.17 10.05 8.82 8.36 4.66 8.49 0.90 <0.02 <0.02 <0.02 <0.02 0.12 5.88 6.04 7.71 5.98 5.90 6.87 6.90 8.63 8.52 8.15 8.46 8.34 8.28 8.25 8.36 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-162 Table E-3. Continued Date Time (CST) Water temp (F) 12/10/94 12/10/94 12/10/94 12/12/94 12/16/94 12/16/94 12/16/94 12/17/94 12/17/94 12/17/94 12/18/94 12/18/94 12/19/94 12/19/94 01/03/95 01/11/95 01/17/95 01/23/95 02/01/95 02/16/95 02/22/95 02/26/95 02/26/95 02/26/95 02/26/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/28/95 02/28/95 02/28/95 03/07/95 03/07/95 03/07/95 03/07/95 03/07/95 03/08/95 03/08/95 03/09/95 6:15 12:15 21:15 12:00 13:02 13:15 20:00 4:00 8:00 16:15 0:01 16:15 12:00 13:27 13:44 12:43 14:22 13:22 13:22 13:22 14:21 11:45 15:45 19:45 23:45 3:45 7:45 11:45 15:45 19:45 23:45 3:45 7:45 10:45 11:25 11:32 12:00 16:00 20:00 10:42 16:07 12:00 - pH Nitrate-N (mg/L) Collection method* - 8.19 8.49 8.39 7.95 8.08 7.48 7.45 7.80 7.84 8.05 8.03 7.92 8.09 7.79 8.22 7.65 9.26 9.31 8.94 8.98 7.91 8.24 8.19 8.26 8.27 8.20 8.14 7.91 7.99 8.06 8.10 8.22 8.34 8.16 9.24 9.32 9.40 9.54 9.81 10.29 10.53 10.06 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-163 Table E-3. Continued Date Time (CST) Water temp (F) 03/09/95 03/09/95 03/10/95 03/10/95 03/10/95 03/16/95 03/22/95 03/28/95 04/05/95 04/07/95 04/12/95 04/27/95 05/02/95 05/09/95 05/17/95 05/22/95 05/31/95 06/05/95 06/12/95 06/21/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/07/95 08/08/95 08/15/95 08/22/95 08/31/95 09/06/95 09/12/95 09/19/95 09/26/95 10/24/95 10/31/95 11/07/95 11/15/95 11/20/95 11/28/95 12/05/95 12/14/95 16:00 20:00 0:01 4:00 8:00 14:35 12:47 14:27 9:37 14:02 13:32 14:13 12:25 13:46 15:36 14:14 10:06 13:33 12:41 13:05 13:09 12:31 11:56 11:18 11:40 12:23 14:20 15:08 13:10 14:10 13:19 12:17 11:25 13:19 11:49 12:16 11:50 9:49 12:54 11:00 11:25 10:30 - pH Nitrate-N (mg/L) Collection method* - 9.75 9.83 9.81 9.89 9.94 9.82 9.48 9.32 9.57 8.97 9.47 10.29 10.24 16.06 7.13 11.54 12.20 12.41 12.59 12.49 11.56 8.18 3.81 1.39 <0.02 4.25 4.77 1.92 0.15 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 1.60 3.87 2.36 2.86 2.09 4.11 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-164 Table E-3. Continued Date Time (CST) Water temp (F) 01/17/96 01/17/96 01/18/96 01/21/96 01/22/96 01/23/96 01/25/96 02/08/96 02/09/96 02/11/96 02/13/96 02/14/96 02/20/96 02/21/96 02/24/96 02/25/96 02/26/96 02/27/96 02/28/96 03/05/96 03/09/96 03/10/96 03/11/96 03/11/96 03/15/96 03/16/96 03/18/96 03/22/96 03/24/96 03/25/96 03/27/96 03/28/96 03/30/96 03/30/96 03/31/96 03/31/96 03/31/96 03/31/96 03/31/96 03/31/96 04/01/96 04/02/96 11:40 22:00 16:00 16:00 12:20 13:23 0:00 11:10 10:34 12:00 9:47 10:46 13:21 8:00 12:00 12:00 12:00 0:00 11:16 11:38 6:00 0:00 0:00 14:41 18:00 0:00 11:45 15:12 6:00 18:00 13:15 2:00 10:00 22:00 2:00 6:00 10:00 14:00 18:00 22:00 11:14 2:00 - pH Nitrate-N (mg/L) Collection method* - 4.14 5.68 5.78 8.70 8.57 8.18 7.88 8.27 6.76 4.80 6.17 6.37 6.31 5.70 4.51 4.47 4.68 4.74 5.05 5.96 11.72 7.52 6.90 6.97 6.46 6.57 6.51 6.84 6.50 6.14 6.42 6.53 6.16 6.11 6.11 6.11 5.81 5.73 6.46 7.61 8.49 8.78 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-165 Table E-3. Continued Date Time (CST) Water temp (F) 04/05/96 04/05/96 04/08/96 04/11/96 04/14/96 04/17/96 04/21/96 04/22/96 04/23/96 04/23/96 04/24/96 04/25/96 04/26/96 04/29/96 04/30/96 04/30/96 05/01/96 05/03/96 05/05/96 05/06/96 05/08/96 05/10/96 05/11/96 05/11/96 05/12/96 05/12/96 05/13/96 05/13/96 05/16/96 05/20/96 05/21/96 05/24/96 05/26/96 05/26/96 05/27/96 05/27/96 05/27/96 05/28/96 05/28/96 06/04/96 06/06/96 06/08/96 10:00 14:00 2:00 20:00 21:00 15:39 9:00 15:00 11:37 15:00 23:00 15:00 7:00 15:00 7:00 14:25 9:00 9:00 9:00 13:45 3:00 15:00 3:00 15:00 3:00 15:00 3:00 15:03 9:00 12:11 15:00 3:00 3:00 15:00 3:00 9:00 15:00 9:00 14:36 13:32 14:00 14:00 - pH Nitrate-N (mg/L) Collection method* - 8.72 8.63 8.43 8.10 7.42 7.38 6.50 8.94 9.41 8.99 8.90 8.86 8.78 11.47 11.44 11.50 11.07 10.37 11.35 10.80 10.53 8.06 10.96 13.10 13.64 13.87 14.01 13.82 14.08 13.81 15.04 13.90 14.93 13.86 13.52 9.08 10.84 20.38 11.90 14.74 15.13 17.66 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-166 Table E-3. Continued Date Time (CST) Water temp (F) 06/11/96 06/12/96 06/16/96 06/18/96 06/20/96 06/23/96 06/25/96 06/26/96 06/29/96 07/01/96 07/03/96 07/06/96 07/08/96 07/12/96 07/14/96 07/15/96 07/18/96 07/22/96 07/22/96 07/22/96 07/23/96 07/25/96 07/29/96 08/02/96 08/05/96 08/06/96 08/12/96 08/19/96 08/19/96 08/20/96 08/26/96 09/09/96 10/16/96 10/22/96 11/12/96 11/18/96 12/02/96 12/10/96 12/18/96 12/30/96 01/07/97 01/22/97 12:09 2:00 2:00 12:32 2:00 2:00 11:25 2:00 2:00 14:52 14:00 8:00 11:21 14:00 14:00 14:24 1:00 1:00 13:00 13:03 1:00 13:00 15:19 1:00 13:14 1:00 13:18 1:00 13:00 13:12 15:10 13:26 13:30 11:19 15:29 14:00 13:56 12:16 12:01 15:30 14:10 13:38 - pH Nitrate-N (mg/L) Collection method* - 14.22 17.00 16.72 13.95 13.49 12.09 13.78 14.44 13.73 13.18 13.44 13.46 11.50 11.21 11.08 8.86 7.55 5.79 6.09 8.54 7.61 8.69 8.92 6.90 4.29 3.78 <0.02 0.96 1.03 0.17 4.34 0.02 <0.02 <0.02 7.05 6.21 8.84 9.16 8.51 8.46 9.05 5.90 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-167 Table E-3. Continued Date Time (CST) Water temp (F) 02/04/97 02/05/97 02/13/97 02/13/97 02/18/97 02/21/97 02/27/97 02/28/97 03/04/97 03/11/97 03/20/97 03/25/97 04/01/97 04/09/97 04/15/97 04/22/97 05/01/97 05/06/97 05/13/97 05/20/97 05/28/97 06/03/97 06/09/97 06/17/97 06/24/97 07/01/97 07/08/97 07/15/97 07/22/97 07/28/97 08/05/97 08/12/97 08/19/97 08/26/97 09/03/97 09/10/97 09/12/97 09/24/97 10/01/97 10/07/97 10/15/97 10/21/97 13:26 13:56 14:15 14:15 13:06 14:05 12:59 10:20 13:41 13:29 9:57 12:31 12:20 11:28 12:08 13:47 16:21 12:32 11:37 14:26 15:28 13:53 12:43 12:31 12:25 11:58 13:30 12:23 12:37 13:53 12:47 12:45 13:26 13:57 13:25 13:12 13:37 13:31 13:36 13:11 14:23 12:56 - pH Nitrate-N (mg/L) Collection method* - 5.56 7.11 9.16 9.11 8.62 8.58 6.38 7.61 10.39 11.28 11.43 11.12 10.61 10.56 9.93 9.82 10.60 10.95 10.19 9.34 13.70 12.79 14.66 13.69 12.13 10.67 9.65 4.82 1.92 0.37 <0.08 <0.08 4.25 0.16 1.09 6.12 3.14 4.73 3.66 1.41 0.79 1.07 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-168 Table E-3. Continued Date Time (CST) Water temp (F) 10/27/97 11/04/97 11/12/97 11/18/97 11/25/97 12/04/97 12/09/97 12/16/97 12/22/97 12/29/97 01/06/98 01/14/98 01/27/98 02/03/98 02/10/98 02/17/98 02/19/98 02/24/98 03/03/98 03/11/98 03/17/98 03/19/98 03/24/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/05/98 05/12/98 05/19/98 05/27/98 06/03/98 06/09/98 06/17/98 06/22/98 07/08/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 15:15 12:47 13:52 13:15 14:14 13:44 12:11 13:04 12:59 13:07 13:21 13:27 13:34 14:35 13:06 13:04 12:39 14:29 13:20 13:43 13:49 12:50 14:55 13:48 13:13 15:28 12:48 13:51 14:28 13:24 13:28 13:07 15:10 13:55 14:07 14:25 9:52 13:41 12:59 13:00 13:20 13:33 - pH Nitrate-N (mg/L) Collection method* - 1.70 1.93 4.21 4.95 4.39 9.31 8.42 8.40 8.17 9.47 9.29 10.93 9.82 10.11 9.74 9.54 11.30 10.61 10.46 11.78 9.37 10.72 9.39 11.98 12.10 11.85 11.91 10.12 11.04 11.63 12.42 14.10 12.15 12.55 9.86 11.13 11.98 11.31 8.02 5.44 0.95 <0.09 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-169 Table E-3. Continued Date Time (CST) Water temp (F) 08/26/98 09/02/98 09/09/98 09/16/98 11/04/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 12/21/98 01/26/99 02/03/99 02/09/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/24/99 03/30/99 04/06/99 04/13/99 04/20/99 04/27/99 05/05/99 05/11/99 05/18/99 05/25/99 06/01/99 06/03/99 06/09/99 06/15/99 07/01/99 07/08/99 07/13/99 07/21/99 07/27/99 08/03/99 08/11/99 08/17/99 08/25/99 08/31/99 11:10 13:49 12:55 13:27 13:27 13:07 13:05 12:44 12:31 13:03 12:27 11:01 11:23 13:11 13:51 12:41 13:42 12:48 13:42 14:30 13:35 13:35 13:48 13:58 13:54 14:12 13:47 13:09 13:07 13:48 12:02 12:42 13:37 11:06 12:00 13:45 12:26 13:26 13:05 12:29 12:13 10:06 13:32 - pH Nitrate-N (mg/L) Collection method* - <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 10.95 11.21 13.49 13.19 12.81 12.32 12.79 12.61 12.99 12.49 12.09 13.61 16.14 15.15 15.07 15.48 14.60 15.23 14.46 17.97 16.49 15.11 14.00 14.41 12.76 6.50 1.23 <0.11 <0.11 4.58 0.11 <0.11 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-170 Table E-3. Concluded Date Time (CST) Water temp (F) 09/07/99 09/15/99 10/05/99 10/13/99 10/18/99 10/26/99 11/01/99 11/08/99 11/15/99 11/22/99 11/29/99 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 02/15/00 02/22/00 02/29/00 03/07/00 03/14/00 03/21/00 03/28/00 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/30/00 06/06/00 06/13/00 06/21/00 06/29/00 07/05/00 07/12/00 07/20/00 07/26/00 08/02/00 13:16 13:57 13:03 12:14 13:45 13:05 16:50 15:37 15:01 14:33 15:35 15:34 15:03 15:36 15:22 14:40 14:32 13:37 15:41 15:05 14:46 14:23 15:58 14:18 14:49 15:42 14:51 15:35 15:42 15:12 15:20 12:51 14:29 15:46 15:39 16:29 16:28 15:25 14:29 9:36 13:40 13:45 54 66 62 48 55 40 43 42 33 41 45 35 34 51 56 65 52 49 48 53 53 53 61 70 66 65 65 71 70 72 67 71 75 78 70 84 88 pH Nitrate-N (mg/L) Collection method* - <0.11 0.11 <0.11 4.86 2.98 5.06 1.76 1.37 0.44 0.35 0.29 5.60 7.24 8.67 6.37 7.73 8.63 8.13 10.21 9.92 9.79 9.90 11.41 10.59 10.31 8.97 10.57 12.13 11.03 9.32 12.90 11.42 15.29 13.98 15.54 13.70 13.71 11.55 10.90 8.36 4.74 0.26 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) A-171 Table E-4. Nitrate-N Sample Concentrations (WY 1993-2008) for Camp Creek near White Heath (Station 104) Date Time (CST) Water temp (F) 04/19/93 05/07/93 05/14/93 06/04/93 06/16/93 06/21/93 06/29/93 07/06/93 07/15/93 07/22/93 07/29/93 08/09/93 08/18/93 08/24/93 08/31/93 09/08/93 09/14/93 09/15/93 09/16/93 09/24/93 09/29/93 10/06/93 10/12/93 10/18/93 10/19/93 10/21/93 10/27/93 11/02/93 11/09/93 11/15/93 11/24/93 12/01/93 12/10/93 12/16/93 12/27/93 01/12/94 12:00 14:10 14:50 16:22 12:30 15:15 11:41 13:48 10:44 15:12 15:39 15:14 9:51 11:00 13:23 14:30 13:41 10:11 10:04 10:33 13:37 15:43 13:46 15:00 12:22 15:30 13:26 14:20 12:24 13:47 13:26 11:57 9:37 11:16 14:40 11:16 - pH Nitrate-N (mg/L) Collection method* - 10.98 12.59 12.24 10.90 11.59 12.99 13.69 11.95 10.75 10.08 10.87 8.64 8.36 8.64 8.11 8.29 7.09 3.84 5.36 7.67 7.52 7.88 7.46 6.17 6.96 5.87 8.09 7.37 7.60 6.97 9.26 8.89 8.27 8.52 8.63 8.07 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-172 Table E-4. Continued Date Time (CST) Water temp (F) 02/03/94 02/15/94 02/22/94 02/28/94 03/07/94 03/17/94 03/23/94 03/28/94 04/04/94 04/11/94 04/12/94 04/13/94 04/18/94 04/25/94 04/29/94 05/03/94 05/09/94 05/16/94 05/24/94 06/03/94 06/06/94 06/13/94 06/20/94 06/27/94 07/05/94 07/12/94 07/26/94 08/01/94 11/01/94 11/06/94 11/07/94 11/14/94 11/21/94 11/28/94 12/05/94 12/05/94 12/07/94 11:50 12:11 12:01 13:09 13:46 13:30 11:50 13:25 11:24 11:56 15:09 14:06 14:11 14:24 16:18 11:54 13:19 13:36 12:25 11:52 11:52 15:32 10:50 11:44 12:26 10:05 10:16 9:22 14:23 12:16 12:34 14:40 10:53 15:02 14:19 14:23 17:06 - pH - A-173 Nitrate-N (mg/L) Collection method* 7.27 5.55 7.98 7.73 8.60 8.72 8.38 7.66 7.05 9.23 4.66 8.89 9.26 9.46 10.54 11.04 11.41 11.32 11.59 11.33 10.92 10.34 9.73 9.36 6.43 4.04 0.38 <0.02 <0.02 0.12 7.36 5.98 5.23 5.63 5.69 5.73 6.98 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-4. Continued Date Time (CST) Water temp (F) 12/08/94 12/08/94 12/08/94 12/08/94 12/09/94 12/09/94 12/09/94 12/10/94 12/10/94 12/10/94 12/12/94 12/16/94 12/16/94 12/17/94 12/17/94 12/18/94 12/19/94 12/19/94 12/19/94 01/17/95 01/23/95 02/01/95 02/08/95 02/16/95 02/22/95 02/26/95 02/26/95 02/26/95 02/26/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/28/95 02/28/95 16:33 16:33 19:00 22:00 1:00 7:00 16:00 1:00 7:00 16:00 13:03 14:30 14:31 0:01 4:00 8:15 0:01 12:00 14:06 15:04 12:45 14:01 10:32 13:58 15:21 11:03 15:03 19:03 23:03 3:03 7:03 11:03 15:03 19:03 23:03 3:03 7:03 - pH - A-174 Nitrate-N (mg/L) 7.87 8.22 8.34 8.19 7.65 8.30 7.85 7.86 7.74 8.00 7.32 6.98 7.32 6.80 7.11 7.83 7.76 8.02 7.49 9.93 9.52 9.24 9.19 8.71 8.30 8.01 8.05 8.08 8.04 7.97 8.14 8.05 7.95 8.08 7.84 7.85 7.84 Collection method* Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 02/28/95 03/07/95 03/07/95 03/07/95 03/07/95 03/08/95 03/08/95 03/09/95 03/09/95 03/10/95 03/10/95 03/10/95 03/10/95 03/16/95 03/22/95 03/28/95 04/04/95 04/07/95 04/12/95 04/25/95 05/02/95 05/04/95 05/10/95 05/17/95 05/22/95 05/26/95 05/31/95 06/05/95 06/13/95 06/21/95 06/27/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/07/95 10:07 12:00 12:10 16:10 20:10 11:14 15:47 16:10 20:10 0:10 4:10 8:10 12:10 15:06 11:12 14:48 10:53 14:48 11:53 11:35 13:35 9:58 11:03 15:00 14:45 11:37 8:55 12:17 13:25 11:44 12:08 12:08 11:16 13:20 10:45 13:04 13:34 - pH - A-175 Nitrate-N (mg/L) Collection method* 7.70 9.06 9.24 9.71 10.67 11.39 11.75 11.18 11.26 11.08 10.92 10.87 10.88 9.91 9.47 9.06 8.85 8.82 8.77 10.44 10.39 10.02 14.21 4.01 13.73 12.11 13.31 13.13 12.65 12.13 11.95 11.96 8.73 4.26 2.48 0.51 0.76 Grab Grab ISCO ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-4. Continued Date Time (CST) Water temp (F) 08/08/95 08/15/95 08/22/95 09/06/95 09/12/95 10/27/95 10/31/95 10/31/95 11/02/95 11/03/95 11/03/95 11/04/95 11/07/95 11/07/95 11/10/95 11/13/95 11/13/95 11/14/95 11/15/95 11/20/95 11/28/95 12/05/95 01/18/96 01/23/96 02/14/96 02/20/96 02/27/96 03/05/96 03/11/96 03/18/96 03/28/96 04/02/96 04/03/96 04/04/96 04/05/96 04/07/96 04/09/96 10:45 15:57 13:35 12:10 11:03 11:21 11:05 11:20 8:00 0:00 4:00 20:00 11:07 12:00 12:00 6:00 10:29 13:46 9:18 12:01 10:30 10:50 15:09 14:07 10:16 12:23 10:19 11:04 13:53 11:14 10:25 10:48 0:00 16:00 8:00 12:00 10:43 - pH - A-176 Nitrate-N (mg/L) Collection method* 3.54 0.79 0.46 <0.02 0.04 0.49 0.67 0.70 2.90 4.55 3.88 4.56 4.36 4.41 3.44 5.17 4.84 0.35 0.46 1.81 1.66 0.73 5.84 9.03 6.03 6.71 6.14 8.28 9.07 8.63 8.06 12.11 11.55 11.29 11.22 10.94 10.54 Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO Grab Table E-4. Continued Date Time (CST) Water temp (F) 04/12/96 04/16/96 04/20/96 04/23/96 04/23/96 04/24/96 04/28/96 04/29/96 04/30/96 04/30/96 04/30/96 05/01/96 05/01/96 05/01/96 05/02/96 05/02/96 05/03/96 05/03/96 05/03/96 05/04/96 05/04/96 05/04/96 05/04/96 05/05/96 05/05/96 05/05/96 05/06/96 05/07/96 05/08/96 05/08/96 05/08/96 05/09/96 05/09/96 05/10/96 05/10/96 05/10/96 05/10/96 19:00 13:23 11:00 10:58 13:00 13:00 13:00 21:00 13:34 15:00 21:00 3:00 9:00 21:00 9:00 21:00 9:00 15:00 21:00 3:00 9:00 15:00 21:00 3:00 9:00 21:00 12:41 3:00 3:00 15:00 21:00 3:00 9:00 3:00 9:00 12:40 15:00 - pH - A-177 Nitrate-N (mg/L) Collection method* 9.72 10.16 9.00 13.70 12.72 12.82 11.24 13.52 16.26 16.00 15.67 15.63 15.25 14.90 14.63 14.41 14.18 14.04 14.03 12.78 8.97 12.77 14.37 14.92 15.18 15.38 15.02 14.98 14.57 10.60 6.34 9.60 12.84 15.21 12.87 6.94 5.41 ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Table E-4. Continued Date Time (CST) Water temp (F) 05/10/96 05/11/96 05/11/96 05/11/96 05/11/96 05/13/96 05/15/96 05/17/96 05/19/96 05/21/96 05/28/96 05/29/96 05/31/96 06/01/96 06/02/96 06/02/96 06/02/96 06/03/96 06/03/96 06/04/96 06/06/96 06/08/96 06/11/96 06/13/96 06/16/96 06/18/96 06/20/96 06/23/96 06/25/96 06/27/96 06/30/96 07/01/96 07/04/96 07/06/96 07/08/96 07/10/96 07/13/96 21:00 3:00 9:00 15:00 21:00 15:00 15:00 10:06 3:00 12:29 13:48 3:00 3:00 21:00 3:00 9:00 15:00 3:00 21:00 12:28 9:00 9:00 11:17 3:00 3:00 11:30 3:00 3:00 10:54 3:00 3:00 14:17 3:00 15:00 13:18 21:00 3:00 - pH - A-178 Nitrate-N (mg/L) Collection method* 5.34 6.14 7.73 10.44 12.27 14.86 16.00 15.99 15.58 15.71 13.27 13.77 16.69 14.92 5.00 4.35 6.01 12.50 11.82 15.02 15.82 16.68 15.28 14.44 14.12 15.61 16.20 15.88 14.90 15.98 14.97 14.84 13.28 14.23 13.11 10.61 10.72 ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 07/15/96 07/21/96 07/22/96 07/22/96 07/23/96 07/24/96 07/25/96 07/29/96 08/01/96 08/05/96 08/07/96 08/12/96 08/18/96 08/19/96 08/20/96 08/26/96 10/16/96 10/22/96 11/12/96 11/18/96 11/25/96 12/02/96 12/10/96 12/18/96 12/30/96 01/07/97 01/22/97 02/04/97 02/05/97 02/13/97 02/18/97 02/21/97 02/27/97 02/28/97 03/04/97 03/11/97 03/14/97 13:25 3:00 3:00 16:11 3:00 15:00 15:00 14:23 3:00 12:03 15:00 14:12 15:00 3:00 12:01 14:06 12:06 10:18 14:26 14:26 10:07 13:10 13:32 14:09 14:51 13:34 13:00 12:53 13:24 13:32 12:13 13:40 13:44 13:07 13:11 12:58 10:37 - pH - A-179 Nitrate-N (mg/L) Collection method* 9.82 6.14 5.32 5.99 6.26 6.45 8.32 7.03 5.89 3.13 2.09 0.50 0.80 1.30 1.79 2.88 <0.02 <0.02 7.15 6.60 5.30 8.84 8.94 8.70 7.67 9.46 6.03 4.34 7.32 9.93 9.90 9.67 5.41 9.62 11.92 12.92 9.20 Grab ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO Grab ISCO Grab ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-4. Continued Date Time (CST) Water temp (F) 03/19/97 03/25/97 04/01/97 04/09/97 04/15/97 04/22/97 05/01/97 05/06/97 05/13/97 05/20/97 05/28/97 06/03/97 06/09/97 06/17/97 06/24/97 07/01/97 07/08/97 07/15/97 07/22/97 07/28/97 08/05/97 08/12/97 08/19/97 08/26/97 09/03/97 09/10/97 09/12/97 09/24/97 10/01/97 10/07/97 10/15/97 10/21/97 10/27/97 11/04/97 11/12/97 11/18/97 11/25/97 15:10 13:16 11:18 10:52 12:59 15:12 13:45 11:33 10:58 15:28 16:16 12:59 11:38 11:18 13:27 13:39 12:28 13:12 14:20 13:15 16:15 11:48 12:14 12:54 12:11 12:13 14:26 12:40 12:52 12:13 15:10 12:15 14:21 12:15 13:17 12:12 13:39 - pH - A-180 Nitrate-N (mg/L) Collection method* 12.36 12.00 11.55 11.50 10.94 10.53 9.77 12.44 11.80 10.58 13.54 12.82 16.36 15.10 13.70 11.93 10.55 6.52 1.90 0.48 0.07 0.08 7.18 4.66 3.17 6.69 4.72 6.88 5.18 3.22 1.63 2.32 2.49 2.86 4.73 4.94 4.31 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-4. Continued Date Time (CST) Water temp (F) 12/04/97 12/09/97 12/16/97 12/22/97 12/29/97 01/06/98 01/14/98 01/27/98 02/03/98 02/10/98 02/17/98 02/24/98 03/03/98 03/11/98 03/17/98 03/19/98 03/24/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/05/98 05/12/98 05/19/98 05/27/98 06/03/98 06/09/98 06/17/98 06/22/98 07/08/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 08/26/98 13:07 13:08 12:05 12:02 11:56 12:41 12:48 12:55 13:21 12:01 11:59 15:19 12:45 13:04 13:08 15:42 15:37 13:13 12:17 12:44 11:44 13:13 15:14 12:43 12:23 12:01 12:01 12:45 16:03 13:56 10:43 12:43 12:22 13:53 12:14 14:22 12:16 - pH - A-181 Nitrate-N (mg/L) Collection method* 9.65 8.56 8.70 8.43 10.12 11.19 11.56 10.36 11.16 10.65 10.20 11.57 11.13 12.82 10.24 10.69 10.19 11.94 12.63 10.68 12.25 10.30 11.10 11.84 12.09 12.78 11.83 12.75 9.67 11.74 10.81 10.64 8.10 6.51 2.96 0.80 <0.09 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-4. Continued Date Time (CST) Water temp (F) 09/02/98 09/09/98 09/16/98 09/22/98 09/30/98 10/06/98 10/14/98 10/20/98 10/29/98 11/04/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 12/21/98 01/26/99 02/03/99 02/10/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/24/99 03/30/99 04/06/99 04/13/99 04/14/99 04/14/99 04/14/99 04/15/99 04/15/99 04/15/99 04/15/99 04/16/99 04/16/99 14:30 12:08 12:48 13:49 12:13 12:56 12:26 11:35 13:26 12:56 12:11 12:10 11:51 11:35 12:05 11:36 10:24 10:25 10:55 13:16 11:50 14:26 11:40 12:04 17:03 12:58 12:58 13:13 11:21 11:42 18:00 0:01 6:00 12:00 18:00 0:01 6:00 - pH - A-182 Nitrate-N (mg/L) Collection method* <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 0.18 <0.09 0.73 0.34 0.65 0.13 0.25 1.94 11.69 11.29 12.87 12.52 12.37 12.82 12.76 12.38 12.44 12.16 11.10 11.33 11.55 11.14 11.05 10.95 10.98 10.11 12.49 13.47 15.42 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 04/16/99 04/16/99 04/17/99 04/17/99 04/17/99 04/17/99 04/17/99 04/17/99 04/18/99 04/18/99 04/18/99 04/19/99 04/19/99 04/19/99 04/20/99 04/20/99 04/27/99 05/05/99 05/11/99 05/18/99 05/21/99 05/21/99 05/21/99 05/21/99 05/22/99 05/22/99 05/22/99 05/23/99 05/23/99 05/23/99 05/24/99 05/24/99 05/24/99 05/25/99 05/25/99 05/25/99 05/26/99 12:00 18:00 0:01 6:00 12:00 14:11 14:26 23:00 7:00 15:00 23:00 7:00 15:00 23:00 7:00 12:30 12:56 13:39 12:18 12:33 10:29 10:42 12:00 20:00 4:00 12:00 20:00 4:00 12:00 20:00 4:00 10:30 10:47 0:01 12:00 12:19 0:01 - pH - A-183 Nitrate-N (mg/L) Collection method* 16.42 16.76 16.90 17.61 17.59 16.96 17.75 17.83 17.64 17.51 17.28 17.15 17.52 17.05 16.82 16.04 14.77 14.45 14.21 13.73 14.29 14.13 14.15 14.19 13.75 14.15 14.48 14.75 14.57 14.45 14.38 14.99 14.87 14.97 14.80 14.67 14.68 ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO Table E-4. Continued Date Time (CST) Water temp (F) 05/26/99 05/27/99 05/27/99 05/27/99 05/28/99 05/29/99 05/30/99 05/30/99 05/31/99 05/31/99 06/01/99 06/01/99 06/01/99 06/01/99 06/02/99 06/02/99 06/02/99 06/02/99 06/02/99 06/03/99 06/03/99 06/03/99 06/03/99 06/05/99 06/05/99 06/06/99 06/06/99 06/06/99 06/07/99 06/07/99 06/07/99 06/07/99 06/07/99 06/08/99 06/08/99 06/08/99 06/09/99 12:00 0:01 9:30 9:43 0:01 0:01 0:01 0:01 0:01 12:00 12:00 14:27 14:38 18:00 0:01 6:00 12:00 15:23 18:00 0:01 6:00 10:57 11:30 12:00 20:00 4:00 12:00 20:00 4:00 12:00 14:40 14:47 20:00 6:26 11:00 11:30 12:00 - pH - A-184 Nitrate-N (mg/L) Collection method* 14.62 14.35 14.40 14.35 14.19 14.01 13.77 13.90 13.92 13.80 13.73 13.81 14.02 14.02 13.86 16.45 16.91 17.51 18.30 18.30 17.68 17.48 17.39 14.07 16.58 16.64 16.36 16.29 15.99 15.79 16.16 16.33 16.00 15.79 15.79 15.64 15.41 ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 06/09/99 06/10/99 06/11/99 06/11/99 06/11/99 06/12/99 06/13/99 06/13/99 06/13/99 06/14/99 06/14/99 06/14/99 06/14/99 06/15/99 06/15/99 06/16/99 06/17/99 06/18/99 06/19/99 06/19/99 06/19/99 06/20/99 06/21/99 06/22/99 06/23/99 06/23/99 06/24/99 06/24/99 06/24/99 06/24/99 06/24/99 06/25/99 06/26/99 06/26/99 06/27/99 06/27/99 06/28/99 13:16 12:00 12:00 15:38 15:40 12:00 0:01 12:00 18:00 0:01 6:00 11:08 11:18 12:00 13:03 12:00 12:00 12:00 7:46 8:00 12:00 12:00 12:00 12:00 0:01 12:00 0:01 12:00 15:39 15:53 20:00 12:00 12:00 20:00 4:00 12:00 12:00 - pH - A-185 Nitrate-N (mg/L) Collection method* 15.58 15.36 15.15 15.18 15.16 14.62 14.63 14.27 13.53 13.26 14.36 15.32 14.78 15.20 14.86 14.71 14.54 14.17 14.28 14.27 14.24 13.97 13.74 13.46 13.25 13.12 12.61 11.53 12.56 12.21 11.80 15.64 14.59 14.15 13.91 11.95 14.21 Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 06/28/99 06/28/99 06/28/99 06/29/99 06/30/99 07/01/99 07/01/99 07/01/99 07/01/99 07/01/99 07/02/99 07/03/99 07/04/99 07/05/99 07/06/99 07/06/99 07/07/99 07/08/99 07/08/99 07/09/99 07/10/99 07/11/99 07/12/99 07/13/99 07/15/99 07/16/99 07/17/99 07/17/99 07/18/99 07/18/99 07/19/99 07/19/99 07/20/99 07/20/99 07/21/99 07/21/99 07/22/99 15:40 15:48 20:00 12:00 12:00 4:00 12:00 14:20 14:27 20:00 12:00 12:00 12:00 12:00 10:57 11:05 12:00 12:00 15:35 12:00 12:00 12:00 12:00 12:31 12:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 13:42 23:00 11:00 11:09 12:00 - pH - A-186 Nitrate-N (mg/L) Collection method* 13.88 14.08 13.73 13.57 13.48 12.65 12.13 12.04 12.20 12.25 12.71 12.15 11.58 11.02 10.92 10.45 10.32 9.96 10.27 9.32 8.90 8.49 8.02 7.50 6.31 5.91 4.30 5.14 3.54 3.83 2.48 2.83 1.83 1.67 1.66 1.57 1.24 ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO Table E-4. Continued Date Time (CST) Water temp (F) 07/23/99 07/23/99 07/23/99 07/24/99 07/26/99 07/26/99 07/27/99 07/27/99 07/27/99 07/27/99 07/27/99 07/28/99 07/28/99 07/28/99 07/28/99 07/28/99 07/29/99 07/29/99 07/29/99 07/30/99 07/31/99 08/01/99 08/02/99 08/03/99 08/03/99 08/04/99 08/05/99 08/05/99 08/05/99 08/06/99 08/07/99 08/07/99 08/08/99 08/09/99 08/10/99 08/11/99 08/11/99 9:00 9:10 12:00 12:00 0:00 12:00 0:00 12:00 12:47 12:47 18:00 6:00 12:00 13:39 13:52 20:00 4:00 12:00 20:00 12:00 12:00 12:00 11:13 12:00 12:04 12:00 12:00 14:47 15:00 12:00 0:00 12:00 12:00 12:00 12:00 0:00 11:22 - pH - A-187 Nitrate-N (mg/L) Collection method* 0.94 1.00 0.92 0.71 0.36 0.41 0.27 0.36 0.36 0.29 0.31 0.28 0.30 0.26 0.48 0.36 0.36 0.34 0.26 0.51 0.26 0.25 0.15 0.20 <0.11 0.18 <0.11 <0.11 0.29 0.16 0.22 <0.11 0.19 0.34 0.25 0.15 0.20 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Table E-4. Continued Date Time (CST) Water temp (F) 08/11/99 08/12/99 08/13/99 08/13/99 08/14/99 08/15/99 08/16/99 08/17/99 08/17/99 08/17/99 08/19/99 08/20/99 08/21/99 08/22/99 08/23/99 08/23/99 08/23/99 08/23/99 08/24/99 08/24/99 08/24/99 08/24/99 08/25/99 08/25/99 08/25/99 08/26/99 08/26/99 08/26/99 08/27/99 08/28/99 08/29/99 08/30/99 08/31/99 08/31/99 08/31/99 09/01/99 09/02/99 11:35 0:00 0:00 12:00 12:00 12:00 12:00 12:00 15:42 15:46 12:00 12:00 12:00 12:00 0:00 10:50 11:03 18:00 0:00 6:00 12:00 12:16 0:00 6:00 12:00 10:06 10:07 10:12 12:00 12:00 12:00 12:00 12:00 12:11 12:26 12:00 12:00 - pH - A-188 Nitrate-N (mg/L) Collection method* 0.23 0.71 3.23 1.98 4.38 4.63 4.55 4.02 3.71 3.62 2.81 2.53 1.92 1.58 0.94 1.18 1.17 1.04 0.65 0.85 0.76 0.77 0.45 0.66 0.58 0.56 0.44 0.55 0.40 0.30 0.21 0.16 0.12 <0.11 0.13 0.21 0.46 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 09/03/99 09/04/99 09/05/99 09/06/99 09/07/99 09/07/99 09/08/99 09/09/99 09/10/99 09/11/99 09/12/99 09/12/99 09/13/99 09/13/99 09/13/99 09/14/99 09/15/99 09/16/99 09/17/99 09/18/99 09/19/99 09/20/99 09/22/99 09/23/99 09/24/99 09/25/99 09/26/99 09/27/99 09/27/99 09/28/99 09/28/99 09/28/99 09/28/99 09/29/99 09/30/99 10/01/99 10/02/99 12:00 12:00 12:00 12:00 10:30 12:11 12:00 12:00 12:00 12:00 0:00 12:00 11:04 11:06 11:11 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 0:00 12:00 0:00 12:00 12:46 12:58 0:00 12:00 12:00 0:00 - pH - A-189 Nitrate-N (mg/L) Collection method* 0.21 0.16 0.13 0.14 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 0.24 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 10/02/99 10/03/99 10/03/99 10/04/99 10/04/99 10/05/99 10/05/99 10/08/99 10/08/99 10/09/99 10/10/99 10/11/99 10/12/99 10/13/99 10/13/99 10/13/99 10/14/99 10/16/99 10/17/99 10/18/99 10/18/99 10/18/99 10/19/99 10/20/99 10/21/99 10/22/99 10/23/99 10/24/99 10/25/99 10/25/99 10/26/99 10/26/99 10/27/99 10/28/99 10/29/99 10/30/99 10/31/99 12:00 0:00 12:00 10:40 10:41 12:00 12:25 0:00 12:00 12:00 12:00 12:00 12:00 12:00 12:47 12:59 12:00 12:00 12:00 11:55 12:00 12:02 12:00 12:00 12:00 12:00 12:00 12:00 0:00 12:12 12:00 12:31 12:00 12:00 12:00 12:00 11:00 46 51 - pH - A-190 Nitrate-N (mg/L) Collection method* <0.11 0.15 <0.11 <0.11 0.13 <0.11 <0.11 0.48 <0.11 <0.11 1.74 1.21 0.70 0.36 0.34 0.38 0.21 <0.11 <0.11 <0.11 <0.13 <0.11 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 11/01/99 11/01/99 11/02/99 11/03/99 11/04/99 11/05/99 11/06/99 11/07/99 11/08/99 11/08/99 11/09/99 11/10/99 11/11/99 11/12/99 11/13/99 11/14/99 11/15/99 11/15/99 11/16/99 11/17/99 11/18/99 11/19/99 11/20/99 11/21/99 11/22/99 11/22/99 11/23/99 11/24/99 11/25/99 11/26/99 11/27/99 11/28/99 11/29/99 11/29/99 11/30/99 12/01/99 12/02/99 12:00 12:16 12:00 12:00 12:00 12:00 12:00 12:00 11:39 12:00 12:00 12:00 12:00 12:00 12:00 12:00 11:33 12:00 12:00 12:00 12:00 12:00 12:00 12:00 10:44 11:00 12:00 12:00 12:00 12:00 12:00 12:00 12:02 12:05 12:02 12:02 0:02 61 56 46 48 40 - pH - A-191 Nitrate-N (mg/L) Collection method* <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 0.16 0.21 0.14 <0.13 <0.13 0.17 0.15 0.14 0.19 0.29 ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 12/06/99 12/06/99 12/07/99 12/08/99 12/09/99 12/10/99 12/11/99 12/12/99 12/13/99 12/13/99 12/14/99 12/15/99 12/16/99 12/17/99 12/18/99 12/19/99 12/20/99 12/20/99 01/03/00 01/10/00 01/10/00 01/11/00 01/12/00 01/13/00 01/15/00 01/16/00 02/22/00 02/22/00 02/23/00 02/24/00 02/25/00 02/26/00 02/26/00 02/27/00 02/27/00 02/28/00 02/29/00 11:37 12:10 12:00 12:00 12:00 12:00 12:00 12:00 11:32 12:00 12:00 12:00 12:00 12:00 12:00 12:00 11:43 12:00 11:52 11:36 11:55 12:00 12:00 12:00 12:00 12:00 12:48 13:00 12:00 12:00 12:00 0:00 12:00 0:00 12:00 12:00 11:30 43 41 35 34 38 46 49 pH - A-192 Nitrate-N (mg/L) 1.37 1.34 1.24 1.23 1.20 1.22 1.32 1.30 1.32 1.39 1.68 3.49 0.23 0.29 1.79 2.92 3.39 3.37 3.55 4.50 4.73 4.77 4.96 4.94 4.68 4.64 9.34 9.39 9.01 8.81 8.57 8.42 8.28 7.85 8.22 8.14 8.01 Collection method* Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Table E-4. Continued Date Time (CST) Water temp (F) 02/29/00 03/01/00 03/02/00 03/03/00 03/04/00 03/05/00 03/06/00 03/07/00 03/07/00 03/08/00 03/09/00 03/10/00 03/11/00 03/12/00 03/13/00 03/14/00 03/14/00 03/15/00 03/16/00 03/17/00 03/18/00 03/19/00 03/20/00 03/20/00 03/21/00 03/21/00 03/28/00 04/04/00 04/06/00 04/07/00 04/08/00 04/09/00 04/10/00 04/11/00 04/11/00 04/12/00 04/13/00 11:44 12:00 12:00 12:00 12:00 12:00 12:00 11:32 12:00 12:00 12:00 12:00 12:00 12:00 12:00 11:08 11:26 12:00 12:00 12:00 12:00 12:00 0:00 12:00 0:00 11:46 15:28 11:15 13:45 12:00 12:00 12:00 12:00 10:49 12:00 12:00 12:00 55 46 48 47 50 49 - pH - A-193 Nitrate-N (mg/L) Collection method* 8.26 8.43 8.36 8.23 8.39 8.41 8.23 7.95 8.07 7.79 7.67 7.64 7.79 7.91 8.13 8.08 7.86 7.66 7.51 7.46 7.26 7.28 6.94 8.67 10.10 10.33 8.99 8.33 8.76 8.43 8.53 8.20 8.14 7.76 7.89 7.60 7.60 ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 04/14/00 04/15/00 04/16/00 04/17/00 04/17/00 04/18/00 04/18/00 04/18/00 04/19/00 04/20/00 04/20/00 04/21/00 04/21/00 04/22/00 04/23/00 04/24/00 04/24/00 04/25/00 04/25/00 04/25/00 04/26/00 04/27/00 04/28/00 04/29/00 04/30/00 05/01/00 05/02/00 05/02/00 05/03/00 05/04/00 05/05/00 05/06/00 05/07/00 05/08/00 05/09/00 05/09/00 05/10/00 12:00 12:00 12:00 0:00 12:00 0:00 11:25 12:00 12:00 0:00 12:00 0:00 12:00 12:00 12:00 0:00 12:00 0:00 11:02 12:00 12:00 12:00 12:00 12:00 12:00 12:00 11:11 12:00 12:00 12:00 12:00 12:00 12:00 12:00 10:55 12:00 12:00 51 53 61 71 - pH - A-194 Nitrate-N (mg/L) Collection method* 7.60 7.42 7.11 6.63 6.81 8.80 9.37 9.39 9.46 9.22 8.94 8.65 8.56 8.74 8.72 8.48 8.51 9.91 10.36 10.45 10.04 9.63 9.60 9.29 8.89 8.76 8.92 8.89 8.72 8.30 7.96 7.66 7.51 7.47 7.44 7.78 7.87 ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Table E-4. Continued Date Time (CST) Water temp (F) 05/11/00 05/12/00 05/13/00 05/14/00 05/15/00 05/16/00 05/16/00 05/17/00 05/17/00 05/18/00 05/18/00 05/19/00 05/20/00 05/20/00 05/21/00 05/21/00 05/22/00 05/22/00 05/23/00 05/23/00 05/23/00 05/24/00 05/24/00 05/25/00 05/25/00 05/26/00 05/26/00 05/27/00 05/27/00 05/28/00 05/28/00 05/28/00 05/28/00 05/29/00 05/29/00 05/30/00 05/30/00 12:00 12:00 12:00 12:00 12:00 11:14 12:00 0:00 12:00 0:00 12:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 7:51 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 11:33 12:00 17:53 0:00 12:00 0:00 10:17 63 65 63 63 65 pH - A-195 Nitrate-N (mg/L) Collection method* 7.84 7.86 15.29 13.27 11.89 10.86 10.71 10.63 10.37 10.22 10.17 11.82 13.28 12.02 11.44 10.98 10.95 10.82 10.45 10.31 10.25 10.01 9.90 11.16 10.68 9.98 9.75 9.13 12.23 12.91 8.10 8.20 10.96 13.77 15.30 15.27 14.94 ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO Grab Table E-4. Continued Date Time (CST) Water temp (F) 05/30/00 05/31/00 05/31/00 06/01/00 06/01/00 06/02/00 06/02/00 06/03/00 06/03/00 06/04/00 06/04/00 06/05/00 06/05/00 06/06/00 06/06/00 06/13/00 06/13/00 06/14/00 06/15/00 06/16/00 06/17/00 06/18/00 06/19/00 06/20/00 06/21/00 06/21/00 06/22/00 06/22/00 06/23/00 06/23/00 06/24/00 06/24/00 06/25/00 06/25/00 06/26/00 06/26/00 06/26/00 06/27/00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 11:05 10:40 12:00 12:00 12:00 12:00 12:00 12:00 12:00 14:15 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 0:00 12:00 16:41 0:00 60 71 71 69 - pH - A-196 Nitrate-N (mg/L) Collection method* 15.24 15.21 14.86 14.61 14.49 14.47 14.36 14.14 14.04 14.02 13.75 12.93 13.99 14.57 14.23 11.57 11.87 13.92 13.59 13.25 12.98 12.74 12.46 11.81 10.77 10.60 12.08 13.19 13.46 13.09 8.80 10.73 11.60 11.98 12.55 12.25 12.26 12.67 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Table E-4. Continued Date Time (CST) Water temp (F) 06/28/00 06/29/00 06/30/00 07/01/00 07/02/00 07/03/00 07/03/00 07/04/00 07/05/00 07/05/00 07/06/00 07/07/00 07/08/00 07/09/00 07/10/00 07/10/00 07/11/00 07/12/00 07/13/00 07/14/00 07/15/00 07/16/00 07/17/00 07/17/00 07/18/00 07/19/00 07/20/00 07/21/00 07/22/00 07/23/00 07/24/00 07/27/00 07/28/00 07/29/00 07/30/00 07/31/00 07/31/00 08/07/00 0:00 0:00 0:00 0:00 0:00 0:00 16:00 0:00 0:00 12:00 12:00 0:00 0:00 0:00 0:00 13:33 0:00 0:00 0:00 0:00 0:00 0:00 0:00 15:06 0:00 0:00 0:00 0:00 0:00 0:00 0:00 10:21 0:00 0:00 0:00 0:00 10:20 12:40 78 80 79 73 75 78 pH - A-197 Nitrate-N (mg/L) Collection method* 12.85 12.76 12.57 12.31 12.04 11.72 11.49 11.45 10.93 10.38 10.71 11.60 11.20 10.62 10.23 9.97 10.01 9.62 9.47 9.91 9.60 8.91 8.44 7.98 8.39 7.60 7.25 6.81 6.07 5.74 5.22 3.39 2.99 2.28 1.79 0.81 0.83 0.85 ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab Grab Table E-4. Continued Date Time (CST) Water temp (F) 08/08/00 08/09/00 08/10/00 08/11/00 08/12/00 08/13/00 08/14/00 08/14/00 08/15/00 08/22/00 08/22/00 08/29/00 08/29/00 09/05/00 09/12/00 09/19/00 09/26/00 10/03/00 10/10/00 10/17/00 10/24/00 10/30/00 11/08/00 11/14/00 11/20/00 11/28/00 12/05/00 01/16/01 01/31/01 02/06/01 02/14/01 02/20/01 02/27/01 03/06/01 03/15/01 03/21/01 03/27/01 04/03/01 0:00 0:00 0:00 0:00 0:00 0:00 0:00 10:18 10:34 10:17 12:00 10:56 11:20 10:22 13:11 9:44 11:07 9:57 10:05 10:40 10:50 12:09 13:58 12:47 11:06 11:14 11:25 12:40 11:55 11:40 13:47 11:51 17:00 11:23 10:46 12:42 12:45 10:51 78 72 75 68 75 64 56 48 58 64 56 51 44 35 39 34 33 35 42 42 41 39 37 46 43 53 pH Nitrate-N (mg/L) Collection method* 7.8 7.8 7.92 7.75 8.04 - 0.80 0.59 0.43 0.30 0.19 0.11 <0.06 0.06 0.06 0.07 <0.06 0.20 0.16 <0.06 <0.06 <0.06 0.39 0.41 8.43 4.61 4.67 3.35 2.98 10.47 10.54 9.76 10.18 8.24 7.12 9.96 11.68 12.55 11.42 12.65 12.36 12.50 12.32 12.01 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO Grab ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-198 Table E-4. Continued Date Time (CST) Water temp (F) 04/10/01 04/17/01 04/25/01 05/01/01 05/08/01 05/16/01 05/22/01 05/30/01 06/13/01 06/20/01 06/27/01 07/03/01 07/10/01 07/17/01 07/25/01 08/01/01 10/17/01 10/24/01 11/01/01 11/06/01 11/13/01 11/19/01 11/27/01 12/04/01 12/11/01 12/19/01 12/26/01 01/08/02 01/15/02 01/22/02 01/29/02 02/04/02 02/13/02 02/19/02 02/22/02 02/25/02 03/05/02 03/12/02 03/19/02 10:43 11:00 10:40 10:50 10:20 13:56 13:42 11:28 9:27 9:08 13:45 9:58 11:01 10:02 12:22 10:00 10:52 11:50 12:01 13:02 12:35 12:32 10:49 11:21 11:53 13:18 11:53 12:11 13:02 11:19 10:57 12:22 11:17 12:26 10:51 11:04 10:49 11:22 12:14 65 47 56 68 66 78 65 67 76 75 79 68 80 76 81 81 50 65 54 53 49 54 47 52 40 47 34 33 38 37 47 38 40 43 40 46 39 45 45 pH Nitrate-N (mg/L) Collection method* 8.07 7.93 8.18 8.23 8.16 7.84 7.94 8.39 7.99 8.05 8.93 8.49 8.15 8.07 7.62 7.90 - 10.82 11.36 10.34 9.84 8.98 8.75 8.91 8.33 11.67 9.29 7.53 4.47 1.98 0.57 0.13 0.06 4.20 3.40 7.03 5.59 5.64 4.98 4.94 7.88 7.54 11.45 10.28 10.06 9.45 9.40 8.84 13.47 12.14 10.21 13.22 13.09 13.59 13.49 12.75 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-199 Table E-4. Concluded Date Time (CST) Water temp (F) pH Nitrate-N (mg/L) Collection method* 03/27/02 03/28/02 03/29/02 03/29/02 03/30/02 04/01/02 04/08/02 04/09/02 04/16/02 04/21/02 04/23/02 04/27/02 04/27/02 04/28/02 04/29/02 04/30/02 05/01/02 05/07/02 05/09/02 05/09/02 05/10/02 05/12/02 05/12/02 05/13/02 05/14/02 05/16/02 05/20/02 05/28/02 06/04/02 06/11/02 06/18/02 06/25/02 07/02/02 07/09/02 07/16/02 07/23/02 10:50 16:07 11:01 19:04 9:50 10:36 13:37 10:15 9:50 10:31 11:26 13:04 16:48 11:19 7:18 10:16 15:55 9:30 8:18 15:24 10:37 14:00 18:53 10:32 10:58 15:10 12:10 10:49 11:28 11:37 9:45 11:02 10:05 10:05 11:56 10:16 40 45 44 45 44 44 50 50 63 50 50 51 50 52 49 54 55 59 59 63 56 62 63 53 56 53 55 64 74 69 65 73 77 82 80 78 7.86 8.00 7.63 7.39 8.01 7.65 7.98 8.40 - 12.35 11.17 13.32 13.49 14.28 14.26 12.66 13.42 13.18 12.50 14.23 12.89 11.22 14.70 16.17 15.99 15.60 14.01 12.93 13.63 15.71 8.53 7.43 8.81 12.71 13.51 15.86 15.31 14.85 12.89 15.44 14.08 12.41 9.13 5.71 0.56 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) ISCO: Point sample, peristaltic pump A-200 Table E-5. Nitrate-N Sample Concentrations (WY 1998-2003) for Sangamon River at Shively Bridge near Mahomet (Station 105), May 1993 – September 2008 Date Time (CST) Water temp (F) 04/19/93 05/07/93 05/14/93 06/03/93 06/14/93 06/22/93 06/29/93 07/06/93 07/22/93 07/29/93 08/09/93 08/12/93 08/13/93 08/16/93 08/24/93 08/31/93 09/08/93 09/09/93 09/10/93 09/14/93 09/24/93 09/29/93 10/07/93 10/12/93 10/18/93 10/19/93 10/20/93 10/21/93 10/27/93 11/02/93 11/09/93 11/15/93 11/23/93 12/01/93 12/09/93 12/15/93 12:40 14:59 15:42 16:35 15:53 10:29 10:57 13:04 16:01 12:24 14:19 14:50 11:35 16:09 11:47 11:46 13:27 14:05 9:37 12:49 11:10 15:37 11:05 11:39 14:11 14:25 14:11 13:03 14:09 13:09 11:21 12:51 11:09 11:17 11:02 15:37 - pH - A-201 Nitrate-N (mg/L) Collection method* 10.10 10.17 10.53 11.50 11.90 11.39 7.93 8.56 8.67 7.52 6.02 3.38 4.99 6.52 6.12 4.83 3.59 4.87 6.02 5.79 6.51 6.64 6.73 6.25 2.37 3.03 4.56 4.27 6.43 5.81 5.79 5.25 6.84 7.31 7.28 6.93 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 12/28/93 01/12/94 02/03/94 02/15/94 02/22/94 02/28/94 03/07/94 03/17/94 03/23/94 03/28/94 04/04/94 04/11/94 04/12/94 04/13/94 04/14/94 04/18/94 04/25/94 04/29/94 05/03/94 05/09/94 05/16/94 05/24/94 06/01/94 06/06/94 06/14/94 06/20/94 06/28/94 07/05/94 07/12/94 07/26/94 08/01/94 09/07/94 09/23/94 10/12/94 10/18/94 10/25/94 11/01/94 13:21 10:40 11:04 11:29 11:12 11:33 13:14 14:09 11:21 14:00 10:54 11:26 14:24 15:04 12:13 14:46 14:58 10:35 11:26 13:53 14:07 11:30 10:50 11:20 8:00 10:28 8:25 11:50 10:28 10:41 8:38 7:30 8:32 10:38 11:00 11:00 15:00 - pH - A-202 Nitrate-N (mg/L) Collection method* 7.18 6.35 5.04 4.44 5.94 5.55 6.36 6.94 6.23 5.55 5.33 7.19 3.43 2.93 4.34 7.50 7.19 7.45 9.32 10.17 8.33 7.60 6.82 6.37 6.03 4.12 3.44 2.01 4.99 <0.02 <0.02 1.07 0.84 0.39 0.57 0.68 0.74 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 11/07/94 11/14/94 11/21/94 11/28/94 12/05/94 12/08/94 12/08/94 12/08/94 12/08/94 12/08/94 12/09/94 12/09/94 12/09/94 12/09/94 12/10/94 12/10/94 12/11/94 12/12/94 12/12/94 12/16/94 12/16/94 12/17/94 12/17/94 12/18/94 12/18/94 12/18/94 12/19/94 12/19/94 12/19/94 01/18/95 01/23/95 02/01/95 02/24/95 02/26/95 02/26/95 02/26/95 02/26/95 11:11 15:08 10:22 15:31 14:57 0:00 11:39 11:40 16:00 20:00 0:00 4:00 8:00 16:00 8:00 16:00 16:00 12:00 13:51 15:14 15:30 8:00 16:00 0:01 4:00 8:00 0:01 12:00 14:46 10:00 11:22 14:33 11:44 11:56 15:56 19:56 23:56 - pH - A-203 Nitrate-N (mg/L) 3.22 4.26 3.53 4.41 5.53 7.54 6.25 6.47 7.39 7.46 8.64 7.93 8.36 9.00 8.35 8.31 8.26 8.33 8.25 7.80 7.36 6.94 7.18 7.30 7.30 7.41 7.72 7.85 7.66 8.98 8.68 8.12 5.36 5.86 5.60 5.50 5.85 Collection method* Grab Grab Grab Grab Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/27/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 02/28/95 03/01/95 03/07/95 03/07/95 03/07/95 03/07/95 03/08/95 03/08/95 03/08/95 03/08/95 03/09/95 03/09/95 03/09/95 03/09/95 03/10/95 03/10/95 03/10/95 03/14/95 03/22/95 03/28/95 04/04/95 04/07/95 04/08/95 04/08/95 04/08/95 3:56 7:56 11:56 15:56 19:56 23:56 3:56 7:56 9:33 11:56 15:56 19:56 23:56 3:56 14:31 14:44 16:00 20:00 0:01 12:00 16:00 20:00 11:04 12:00 16:00 20:00 0:01 8:00 12:00 9:18 10:44 15:17 10:30 15:42 0:00 4:00 8:00 - pH - A-204 Nitrate-N (mg/L) Collection method* 5.85 5.79 5.44 5.41 5.60 5.79 5.71 5.78 5.17 5.79 5.78 6.12 6.10 8.87 4.64 4.51 4.95 6.18 6.76 8.08 8.59 9.02 10.16 9.41 9.82 10.00 10.14 10.16 10.33 9.60 8.26 9.07 8.18 7.86 7.38 7.72 7.57 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 04/08/95 04/08/95 04/08/95 04/09/95 04/09/95 04/09/95 04/09/95 04/09/95 04/09/95 04/10/95 04/10/95 04/10/95 04/10/95 04/10/95 04/10/95 04/11/95 04/11/95 04/11/95 04/11/95 04/11/95 04/11/95 04/12/95 04/12/95 04/12/95 04/12/95 04/12/95 04/12/95 04/13/95 04/13/95 04/13/95 04/13/95 04/13/95 04/13/95 04/14/95 04/14/95 04/14/95 04/25/95 12:00 16:00 20:00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00 8:00 12:00 16:00 20:00 4:00 8:00 12:00 16:00 16:30 20:00 0:01 4:00 8:00 12:00 16:00 20:00 0:01 4:00 8:00 12:00 16:00 20:00 0:01 4:00 8:00 11:00 - pH - A-205 Nitrate-N (mg/L) Collection method* 7.43 7.52 7.60 7.41 7.37 7.33 7.31 7.26 7.31 7.35 7.42 7.34 7.70 8.08 7.29 7.93 9.32 10.06 10.33 10.29 9.85 10.10 10.27 9.21 9.31 9.64 10.18 10.31 10.34 10.57 10.79 10.80 11.07 11.22 11.36 11.31 10.56 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Table E-5. Continued Date Time (CST) Water temp (F) 05/02/95 05/10/95 05/17/95 05/17/95 05/22/95 05/30/95 06/05/95 06/12/95 06/21/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/04/95 08/04/95 08/04/95 08/04/95 08/04/95 08/05/95 08/05/95 08/05/95 08/05/95 08/05/95 08/05/95 08/06/95 08/06/95 08/06/95 08/06/95 08/06/95 08/07/95 08/07/95 08/07/95 08/07/95 08/07/95 08/07/95 08/08/95 14:26 11:42 12:05 14:25 15:25 15:30 10:34 14:36 11:11 11:31 10:42 14:09 10:10 13:48 0:00 10:29 12:17 16:00 20:00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 8:00 12:00 16:00 20:00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 - pH - A-206 Nitrate-N (mg/L) Collection method* 9.51 11.01 7.33 7.71 11.45 11.11 11.08 11.10 9.25 10.09 7.84 4.62 2.89 1.52 0.68 1.01 <0.02 0.74 0.75 1.51 0.71 0.76 1.01 0.80 0.94 2.62 2.31 2.52 2.51 2.74 2.48 2.54 2.44 2.75 3.01 2.83 3.90 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 08/08/95 08/08/95 08/08/95 08/08/95 08/09/95 08/09/95 08/09/95 08/10/95 08/10/95 08/10/95 08/11/95 08/11/95 08/11/95 08/11/95 08/12/95 08/12/95 08/16/95 08/22/95 08/31/95 08/31/95 09/06/95 09/12/95 09/19/95 09/26/95 10/05/95 10/11/95 10/17/95 10/24/95 10/27/95 10/31/95 11/01/95 11/03/95 11/06/95 11/06/95 11/06/95 11/09/95 11/11/95 4:00 8:00 12:00 20:00 4:00 12:00 20:00 0:00 8:00 20:00 0:00 8:00 12:00 18:00 6:00 12:00 10:44 14:05 13:02 13:31 11:40 10:29 10:19 10:36 14:36 11:01 10:42 10:33 10:22 10:05 6:00 6:00 6:00 11:01 12:00 12:00 12:00 - pH - A-207 Nitrate-N (mg/L) Collection method* 2.75 3.57 4.39 3.67 4.16 3.42 3.91 4.90 4.17 4.18 5.47 4.95 4.77 5.19 5.72 5.26 4.19 3.83 1.62 <0.02 0.31 0.48 0.39 1.03 0.94 0.75 0.22 0.38 0.42 0.25 0.51 1.83 7.86 7.68 7.89 6.94 5.25 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 11/13/95 11/13/95 11/14/95 11/16/95 11/19/95 11/20/95 11/22/95 11/26/95 11/27/95 12/02/95 12/05/95 12/07/95 12/18/95 01/18/96 01/19/96 01/19/96 01/22/96 01/23/96 01/26/96 02/09/96 02/11/96 02/14/96 02/20/96 02/22/96 02/24/96 02/26/96 02/28/96 03/05/96 03/08/96 03/11/96 03/11/96 03/14/96 03/16/96 03/18/96 03/22/96 03/24/96 03/28/96 6:00 11:10 13:09 18:00 10:00 11:26 18:00 2:00 12:23 2:00 10:17 18:00 11:57 11:45 4:40 12:30 11:16 14:42 11:00 9:55 12:00 9:46 11:49 16:00 22:00 22:00 10:25 10:19 18:00 0:00 13:19 6:00 6:00 10:28 15:54 0:00 9:58 - pH - A-208 Nitrate-N (mg/L) Collection method* 7.76 7.96 8.13 8.04 7.60 7.18 7.69 6.89 6.56 5.79 5.39 4.90 4.51 4.67 12.94 8.04 9.98 9.18 8.40 7.47 5.80 5.18 5.69 5.60 4.80 5.01 5.37 6.61 6.78 7.38 7.55 5.96 5.35 5.02 6.30 6.25 5.81 ISCO Grab Grab ISCO ISCO Grab ISCO ISCO Grab ISCO Grab ISCO Grab Grab ISCO Grab Grab Grab ISCO Grab ISCO Grab Grab ISCO ISCO ISCO Grab Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab Table E-5. Continued Date Time (CST) Water temp (F) 03/29/96 03/31/96 03/31/96 04/01/96 04/01/96 04/01/96 04/01/96 04/02/96 04/04/96 04/06/96 04/09/96 04/12/96 04/16/96 04/22/96 04/23/96 04/24/96 04/25/96 04/26/96 04/29/96 04/30/96 05/01/96 05/04/96 05/05/96 05/05/96 05/05/96 05/06/96 05/06/96 05/06/96 05/07/96 05/07/96 05/07/96 05/08/96 05/08/96 05/09/96 05/11/96 05/12/96 05/14/96 0:00 0:00 12:00 0:00 6:00 12:00 18:00 10:16 12:00 0:00 10:06 13:00 10:23 5:00 10:26 5:00 5:00 5:00 5:00 12:14 5:00 21:00 5:00 13:00 21:00 5:00 13:00 21:00 5:00 11:13 13:00 5:00 21:00 13:00 5:00 5:00 5:00 - pH - A-209 Nitrate-N (mg/L) Collection method* 6.08 4.79 0.31 8.06 5.13 5.77 7.54 8.12 9.28 8.23 7.67 6.88 5.99 4.76 7.27 10.13 10.16 9.68 7.37 9.71 9.77 9.10 8.94 8.84 8.89 9.15 10.37 11.21 10.67 11.27 12.28 11.89 9.74 12.52 6.46 5.60 12.28 ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 05/14/96 05/18/96 05/21/96 05/22/96 05/24/96 05/27/96 05/28/96 05/28/96 05/28/96 05/29/96 05/30/96 06/01/96 06/02/96 06/03/96 06/03/96 06/04/96 06/05/96 06/05/96 06/07/96 06/10/96 06/12/96 06/15/96 06/19/96 06/19/96 06/22/96 06/24/96 06/26/96 06/28/96 07/01/96 07/02/96 07/05/96 07/10/96 07/11/96 07/15/96 07/16/96 07/21/96 07/22/96 15:08 5:00 11:02 5:00 13:00 13:00 5:00 11:25 21:00 11:14 5:00 21:00 13:00 5:00 21:00 13:00 5:00 14:55 5:00 5:00 11:55 5:00 5:00 12:42 5:00 21:00 10:22 5:00 5:00 11:48 21:00 15:49 9:00 9:00 10:05 9:00 9:00 - pH - A-210 Nitrate-N (mg/L) Collection method* 12.42 13.48 12.63 12.56 12.27 8.49 10.35 10.46 7.67 9.54 12.64 13.92 9.14 10.01 8.61 12.62 13.69 14.14 14.42 13.85 13.60 14.06 6.83 8.95 13.17 12.49 11.71 12.53 11.35 11.46 10.60 8.66 8.35 10.49 6.53 4.49 4.37 Grab ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO Grab ISCO ISCO Grab ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 07/22/96 07/22/96 07/23/96 07/24/96 07/25/96 07/29/96 08/04/96 08/05/96 08/08/96 08/12/96 08/19/96 08/19/96 08/20/96 08/26/96 09/03/96 09/09/96 09/17/96 09/24/96 10/01/96 10/09/96 10/16/96 10/21/96 10/30/96 11/06/96 11/12/96 11/18/96 11/25/96 12/02/96 12/10/96 12/18/96 12/30/96 01/07/97 01/22/97 02/04/97 02/05/97 02/13/97 02/18/97 12:01 21:00 9:00 9:00 21:00 13:32 9:00 11:18 1:00 11:52 1:00 13:00 11:14 13:19 15:57 14:45 13:58 11:46 10:15 14:41 11:29 15:31 14:03 12:02 13:40 15:02 11:45 12:25 14:12 14:52 14:10 12:56 11:55 11:50 12:44 12:56 11:34 - pH - A-211 Nitrate-N (mg/L) Collection method* 4.81 6.77 9.83 12.47 10.76 7.01 8.60 7.77 5.54 2.52 1.72 1.98 1.94 1.43 0.51 0.77 1.14 0.97 0.53 0.95 0.51 0.33 0.08 0.19 0.57 0.96 0.88 2.48 5.61 8.01 7.75 8.11 3.48 5.64 4.51 7.77 7.83 Grab ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO Grab ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 02/21/97 02/27/97 02/28/97 03/03/97 03/04/97 03/10/97 03/11/97 03/14/97 03/20/97 03/25/97 04/01/97 04/08/97 04/15/97 04/22/97 05/01/97 05/03/97 05/03/97 05/03/97 05/04/97 05/04/97 05/04/97 05/04/97 05/05/97 05/05/97 05/06/97 05/06/97 05/08/97 05/10/97 05/12/97 05/12/97 05/14/97 05/16/97 05/18/97 05/19/97 05/19/97 05/20/97 05/21/97 13:03 14:26 14:47 13:42 12:36 15:22 12:22 10:07 10:36 13:54 10:44 11:23 13:37 15:46 17:05 14:30 14:42 18:00 0:01 6:00 12:00 18:00 0:01 12:00 10:49 18:00 12:00 6:00 13:12 13:22 6:00 6:00 6:00 12:41 12:52 18:00 0:00 - pH - A-212 Nitrate-N (mg/L) Collection method* 4.95 4.65 5.11 10.27 10.85 10.32 11.51 9.44 11.30 10.48 9.74 9.43 9.83 9.24 7.84 6.36 6.12 6.69 8.19 11.19 12.71 12.56 13.16 13.25 12.00 12.14 10.66 11.79 9.29 9.28 9.52 9.09 8.39 7.79 7.72 7.41 7.18 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 05/21/97 05/23/97 05/24/97 05/24/97 05/24/97 05/25/97 05/25/97 05/25/97 05/25/97 05/26/97 05/27/97 05/27/97 05/28/97 05/30/97 05/31/97 06/01/97 06/02/97 06/02/97 06/02/97 06/03/97 06/04/97 06/04/97 06/05/97 06/06/97 06/07/97 06/07/97 06/07/97 06/07/97 06/08/97 06/08/97 06/08/97 06/08/97 06/09/97 06/09/97 06/09/97 06/09/97 06/10/97 12:00 6:00 0:00 12:00 18:00 0:00 6:00 12:00 18:00 6:00 13:31 13:39 18:00 0:00 6:00 12:00 12:00 14:04 14:14 6:00 0:01 18:00 12:00 12:00 0:01 6:00 12:00 18:00 0:01 6:00 12:00 18:00 0:01 6:00 11:01 11:07 12:00 - pH - A-213 Nitrate-N (mg/L) Collection method* 7.29 6.89 6.70 6.57 6.85 8.26 6.67 6.32 6.45 13.29 15.05 15.47 13.56 14.75 14.41 14.26 13.72 13.60 13.88 14.71 15.37 15.79 15.45 14.89 14.63 14.67 7.34 8.70 12.11 14.03 13.90 12.79 11.35 11.82 12.85 13.11 14.73 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 06/11/97 06/12/97 06/12/97 06/13/97 06/13/97 06/13/97 06/13/97 06/14/97 06/15/97 06/16/97 06/16/97 06/17/97 06/17/97 06/19/97 06/24/97 06/24/97 06/24/97 06/25/97 06/25/97 06/26/97 06/26/97 06/26/97 06/27/97 06/28/97 06/29/97 06/30/97 07/01/97 07/08/97 07/08/97 07/09/97 07/10/97 07/10/97 07/10/97 07/10/97 07/11/97 07/11/97 07/12/97 18:00 18:00 23:00 5:00 11:00 13:34 13:45 10:00 6:00 2:00 22:00 10:45 10:53 18:00 0:01 11:14 11:15 12:00 18:00 0:01 6:00 18:00 6:00 0:01 6:00 6:00 14:13 11:28 11:45 12:00 0:01 6:00 12:00 18:00 0:01 12:00 6:00 - pH - A-214 Nitrate-N (mg/L) Collection method* 14.84 14.56 13.69 12.41 12.60 11.88 11.76 13.24 13.67 14.84 14.51 14.95 14.46 13.65 12.80 12.76 11.90 12.25 11.71 10.19 7.87 8.95 11.36 12.18 12.60 12.11 9.81 10.46 10.24 9.55 9.57 2.71 4.67 4.20 4.77 6.41 8.46 ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 07/13/97 07/14/97 07/15/97 07/22/97 07/28/97 08/05/97 08/12/97 08/17/97 08/17/97 08/17/97 08/17/97 08/18/97 08/18/97 08/18/97 08/18/97 08/18/97 08/18/97 08/19/97 08/19/97 08/19/97 08/19/97 08/19/97 08/19/97 08/20/97 08/20/97 08/20/97 08/20/97 08/21/97 08/21/97 08/21/97 08/21/97 08/26/97 09/03/97 09/10/97 09/12/97 09/24/97 10/01/97 6:00 18:00 11:36 15:16 12:30 11:28 11:10 10:19 12:00 16:00 20:00 0:01 4:00 8:00 12:00 16:00 20:00 0:01 4:00 8:00 11:26 12:00 18:00 0:01 6:00 12:00 18:00 0:01 6:00 12:00 18:00 12:05 11:36 11:24 15:19 11:59 11:28 - pH - A-215 Nitrate-N (mg/L) 8.74 7.60 7.49 3.42 1.63 0.72 0.51 0.55 0.49 0.62 0.97 1.35 1.83 1.75 1.69 1.79 2.06 2.42 2.98 3.19 3.66 3.64 4.07 4.53 4.92 5.04 5.13 5.16 5.17 5.15 5.05 3.02 1.07 0.31 1.83 1.13 0.54 Collection method* ISCO ISCO Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 10/07/97 10/16/97 10/21/97 10/27/97 11/04/97 11/12/97 11/18/97 11/25/97 12/04/97 12/09/97 12/16/97 12/22/97 12/29/97 01/06/98 01/14/98 01/27/98 02/03/98 02/10/98 02/17/98 02/19/98 02/25/98 03/03/98 03/11/98 03/17/98 03/19/98 03/23/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/05/98 05/12/98 05/19/98 05/27/98 06/03/98 06/09/98 11:28 11:23 11:01 13:16 10:53 12:00 11:37 13:00 12:24 13:52 11:32 11:28 11:20 11:16 12:06 12:22 12:31 11:27 11:24 11:15 16:51 11:37 12:19 12:27 11:10 12:58 12:33 11:41 11:58 11:08 12:37 15:55 12:04 11:44 11:26 11:26 12:05 - pH - A-216 Nitrate-N (mg/L) Collection method* 0.42 0.22 0.39 0.38 0.38 0.37 0.44 0.32 3.90 4.66 5.13 4.23 9.33 6.47 11.05 8.55 9.80 9.02 9.56 10.73 10.55 9.69 11.86 10.79 7.26 7.04 9.95 11.86 9.97 11.39 9.11 10.80 11.10 12.15 12.31 11.71 8.32 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 06/16/98 06/22/98 07/08/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 08/25/98 09/02/98 09/09/98 09/16/98 09/21/98 09/21/98 09/22/98 09/23/98 09/24/98 09/25/98 09/26/98 09/27/98 09/28/98 09/29/98 09/30/98 09/30/98 10/01/98 10/02/98 10/03/98 10/04/98 10/05/98 10/06/98 10/06/98 10/07/98 10/08/98 10/09/98 10/10/98 10/11/98 10/12/98 12:02 13:25 11:27 11:49 11:48 14:30 11:39 15:01 15:38 15:09 11:33 10:59 13:42 14:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 11:21 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:19 12:00 12:00 12:00 12:00 12:00 12:00 - pH - A-217 Nitrate-N (mg/L) Collection method* 10.15 11.53 9.77 9.52 6.49 5.58 1.41 3.87 0.09 0.32 0.54 0.72 0.88 0.85 0.86 0.94 0.96 0.73 0.63 0.89 0.90 0.92 0.86 0.81 0.92 0.83 0.75 0.87 0.91 1.12 1.30 1.30 1.12 1.13 0.85 0.76 0.83 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 10/13/98 10/14/98 10/14/98 10/15/98 10/16/98 10/17/98 10/18/98 10/19/98 10/20/98 10/20/98 10/21/98 10/22/98 10/23/98 10/24/98 10/25/98 10/26/98 10/27/98 10/29/98 10/30/98 10/31/98 11/01/98 11/02/98 11/03/98 11/04/98 11/04/98 11/05/98 11/06/98 11/07/98 11/08/98 11/09/98 11/10/98 11/11/98 11/12/98 11/12/98 11/13/98 11/14/98 11/15/98 12:00 11:38 11:50 12:00 12:00 12:00 12:00 12:00 10:51 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 14:07 12:00 12:00 12:00 12:00 12:00 12:00 12:22 12:00 12:00 12:00 12:00 12:00 12:00 12:00 10:55 12:00 12:00 12:00 12:00 - pH - A-218 Nitrate-N (mg/L) 0.91 1.04 1.07 1.12 1.29 1.22 1.16 1.08 1.15 1.00 1.02 1.21 1.22 1.07 1.00 0.98 0.96 1.09 1.01 0.79 0.54 0.47 0.42 0.38 0.64 0.65 0.55 0.63 0.66 0.62 0.59 0.56 0.70 0.50 0.35 0.41 Collection method* ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 11/16/98 11/17/98 11/18/98 11/18/98 11/19/98 11/20/98 11/21/98 11/22/98 11/23/98 11/23/98 11/24/98 11/25/98 12/01/98 12/09/98 12/15/98 12/21/98 01/25/99 01/25/99 01/26/99 01/27/99 01/28/99 01/29/99 02/01/99 02/02/99 02/02/99 02/03/99 02/08/99 02/08/99 02/09/99 02/09/99 02/10/99 02/11/99 02/12/99 02/13/99 02/17/99 02/24/99 03/03/99 12:00 12:00 11:20 12:00 12:00 12:00 12:00 12:00 11:37 12:00 12:00 12:00 11:09 11:01 11:31 10:58 11:47 12:00 12:00 12:00 12:00 12:00 12:00 11:24 12:00 12:00 0:01 12:00 11:58 12:00 12:00 12:00 12:00 12:00 12:22 11:16 15:09 - pH - A-219 Nitrate-N (mg/L) Collection method* 0.46 0.40 0.41 0.46 0.40 0.40 0.48 0.57 0.54 0.58 0.54 0.50 0.35 0.29 0.60 1.20 9.63 9.61 10.95 11.41 11.14 10.65 10.52 10.93 11.17 11.89 9.11 9.97 11.11 11.62 12.64 12.82 12.06 12.38 11.89 11.09 11.17 ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 03/04/99 03/04/99 03/10/99 03/16/99 03/16/99 03/17/99 03/18/99 03/19/99 03/20/99 03/21/99 03/22/99 03/23/99 03/24/99 03/25/99 03/25/99 03/26/99 03/27/99 03/28/99 03/29/99 03/30/99 03/30/99 03/31/99 04/01/99 04/02/99 04/03/99 04/04/99 04/05/99 04/05/99 04/06/99 04/06/99 04/07/99 04/08/99 04/09/99 04/10/99 04/11/99 04/12/99 04/13/99 0:01 12:00 10:53 11:22 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 12:00 10:42 12:00 12:00 12:00 12:00 12:00 12:00 12:06 12:00 12:00 12:00 12:00 12:00 12:00 13:26 12:21 13:00 13:00 13:40 12:00 12:00 12:00 12:00 12:39 - pH - A-220 Nitrate-N (mg/L) Collection method* 11.85 11.88 12.23 10.77 11.19 11.42 11.79 11.52 11.86 11.53 11.47 11.32 11.07 10.93 10.97 10.72 10.56 10.45 10.37 10.10 10.23 10.28 10.16 9.94 9.60 9.32 9.22 9.36 8.64 8.59 8.32 8.73 8.72 9.70 12.51 12.18 12.15 ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab Table E-5. Continued Date Time (CST) Water temp (F) 04/14/99 04/14/99 04/14/99 04/15/99 04/15/99 04/15/99 04/16/99 04/16/99 04/16/99 04/17/99 04/17/99 04/17/99 04/17/99 04/18/99 04/18/99 04/18/99 04/18/99 04/19/99 04/19/99 04/19/99 04/20/99 04/20/99 04/20/99 04/21/99 04/21/99 04/22/99 04/22/99 04/23/99 04/23/99 04/24/99 04/24/99 04/25/99 04/26/99 04/26/99 04/27/99 04/27/99 04/28/99 13:21 13:41 20:00 4:00 12:00 20:00 4:00 12:17 18:22 0:42 7:02 13:22 19:42 1:02 7:22 13:33 14:05 0:01 12:00 14:15 0:01 11:45 12:00 0:01 12:00 0:01 12:00 0:01 12:00 0:01 12:00 0:01 11:34 11:47 12:00 12:16 12:00 - pH - A-221 Nitrate-N (mg/L) Collection method* 11.84 11.68 11.58 11.35 9.78 9.50 10.68 13.43 14.56 14.97 14.67 14.85 14.87 14.96 14.78 14.74 14.59 15.02 15.44 15.59 15.77 15.36 15.63 15.45 14.96 14.82 14.64 14.31 14.18 14.08 13.97 13.87 13.89 13.82 13.69 13.81 13.23 Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO Table E-5. Continued Date Time (CST) Water temp (F) 04/29/99 04/30/99 05/01/99 05/02/99 05/03/99 05/05/99 05/05/99 05/06/99 05/07/99 05/08/99 05/09/99 05/10/99 05/11/99 05/11/99 05/12/99 05/13/99 05/14/99 05/15/99 05/16/99 05/17/99 05/17/99 05/18/99 05/18/99 05/18/99 05/19/99 05/19/99 05/20/99 05/20/99 05/21/99 05/21/99 05/21/99 05/22/99 05/22/99 05/23/99 05/24/99 05/25/99 05/25/99 12:00 12:00 12:00 12:00 0:01 12:47 12:57 12:00 12:00 12:00 12:00 12:00 11:30 11:33 12:00 12:00 12:00 12:00 12:00 12:00 12:42 0:01 11:54 12:00 0:01 12:00 0:01 12:00 0:01 11:23 11:41 8:18 12:00 12:00 12:00 11:43 12:00 - pH - A-222 Nitrate-N (mg/L) Collection method* 13.03 13.28 13.33 13.07 13.18 12.88 13.10 12.73 12.52 12.26 12.10 11.90 12.06 11.09 10.85 10.21 10.90 13.65 14.63 13.60 14.30 13.37 12.71 13.19 13.70 13.79 13.67 13.54 13.35 13.19 13.28 12.40 12.68 12.78 12.53 12.47 12.43 ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO Grab ISCO Table E-5. Continued Date Time (CST) Water temp (F) 05/27/99 05/28/99 05/29/99 05/30/99 05/31/99 06/01/99 06/01/99 06/02/99 06/02/99 06/03/99 06/04/99 06/05/99 06/05/99 06/06/99 06/07/99 06/08/99 06/09/99 06/09/99 06/10/99 06/10/99 06/11/99 06/11/99 06/12/99 06/12/99 06/13/99 06/13/99 06/13/99 06/13/99 06/14/99 06/15/99 06/16/99 06/16/99 06/17/99 06/17/99 06/17/99 06/18/99 06/18/99 12:00 12:00 12:00 12:00 12:00 12:00 15:16 12:00 14:30 12:00 12:00 8:48 12:00 12:00 12:00 12:00 14:04 14:18 0:01 13:50 4:00 20:00 12:00 21:48 4:00 12:00 21:19 21:22 12:53 12:14 13:25 13:35 4:00 12:00 20:00 12:00 20:00 - pH - A-223 Nitrate-N (mg/L) Collection method* 13.05 12.65 12.44 11.72 11.63 11.25 10.78 11.07 10.34 13.74 17.12 14.96 13.90 15.74 16.00 14.63 14.57 14.53 14.30 14.22 13.80 13.42 13.15 13.40 12.96 12.67 12.61 <0.11 13.69 11.69 12.15 12.71 13.69 13.83 14.03 14.22 14.26 ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Table E-5. Continued Date Time (CST) Water temp (F) 06/19/99 06/19/99 06/21/99 07/01/99 07/08/99 07/13/99 07/20/99 07/21/99 07/27/99 07/28/99 08/03/99 08/11/99 08/17/99 08/24/99 08/31/99 09/07/99 09/15/99 09/22/99 09/28/99 10/05/99 10/13/99 10/26/99 11/01/99 11/08/99 11/15/99 11/22/99 11/29/99 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 01/30/00 02/15/00 02/22/00 02/29/00 12:00 12:00 12:15 10:30 10:45 11:52 14:37 10:33 11:53 12:15 11:27 10:46 11:37 11:41 11:33 11:32 11:51 11:54 12:09 11:49 13:34 11:55 11:22 10:49 16:05 10:12 11:25 11:01 10:59 11:12 11:10 10:57 10:40 14:18 10:29 12:18 10:58 49 60 53 49 48 42 44 41 36 39 39 34 34 34 39 - pH - A-224 Nitrate-N (mg/L) Collection method* 13.79 14.07 13.83 11.55 11.59 9.08 4.03 4.18 0.76 0.53 <0.11 0.64 0.75 0.67 0.26 0.28 0.63 0.68 0.33 0.50 0.33 1.19 0.41 <0.13 <0.13 0.16 0.61 1.54 1.05 0.96 1.19 1.77 2.04 2.09 4.22 9.21 6.14 ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 03/07/00 03/14/00 03/21/00 03/28/00 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/28/00 05/30/00 06/06/00 06/16/00 06/20/00 06/26/00 07/03/00 07/10/00 07/17/00 07/24/00 08/02/00 08/07/00 08/15/00 08/22/00 08/29/00 09/05/00 09/12/00 09/19/00 09/26/00 10/03/00 10/05/00 10/10/00 10/17/00 10/24/00 10/30/00 15:23 10:33 11:14 11:30 10:34 10:11 10:45 10:21 10:21 10:01 10:10 13:34 10:43 9:32 10:35 13:16 13:35 13:31 12:48 10:57 13:56 14:53 8:44 10:07 9:30 9:40 10:17 9:44 9:19 9:00 9:33 9:11 14:15 9:30 9:57 10:18 11:36 57 46 47 51 51 49 56 55 61 71 63 67 63 64 62 73 71 71 78 76 78 73 75 75 71 74 68 70 64 64 62 48 57 62 55 pH - A-225 Nitrate-N (mg/L) Collection method* 6.49 5.68 8.11 8.31 6.88 5.98 4.60 11.46 8.84 6.34 8.39 12.44 13.82 16.91 12.39 10.75 8.48 12.90 10.74 8.67 5.65 2.53 1.95 0.97 0.89 0.65 1.65 0.79 1.54 2.15 1.99 3.43 2.39 5.19 3.13 2.75 0.41 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) pH 11/08/00 11/14/00 11/20/00 11/28/00 12/05/00 12/14/00 01/16/01 02/06/01 02/09/01 02/14/01 02/20/01 02/24/01 02/25/01 02/25/01 02/25/01 02/25/01 02/25/01 02/26/01 02/26/01 02/26/01 02/27/01 02/27/01 02/27/01 02/28/01 02/28/01 02/28/01 03/01/01 03/01/01 03/01/01 03/01/01 03/01/01 03/01/01 03/02/01 03/02/01 03/02/01 03/02/01 03/06/01 14:50 12:05 10:22 10:32 10:40 9:45 11:53 17:05 13:05 13:05 10:56 12:18 12:41 14:28 16:25 17:26 18:20 13:02 14:32 15:41 12:16 14:27 14:45 14:20 15:00 16:31 10:11 10:56 11:32 13:57 14:53 15:50 9:47 12:00 14:00 15:43 10:38 52 44 34 38 32 32 33 40 39 38 43 43 43 43 43 42 42 43 39 39 39 37 37 37 36 36 37 37 37 37 39 39 39 39 37 8.10 - A-226 Nitrate-N (mg/L) 0.92 10.33 10.36 8.61 8.69 8.91 6.21 9.35 8.28 9.91 12.17 9.60 4.20 4.26 4.38 4.42 4.52 4.69 4.68 4.69 7.09 7.44 10.20 10.22 10.32 10.99 11.03 11.03 11.06 11.10 11.08 11.18 11.22 11.20 11.26 12.08 Collection method* Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) pH 03/15/01 03/21/01 03/27/01 04/03/01 04/10/01 04/17/01 04/17/01 04/24/01 05/01/01 05/09/01 05/16/01 05/22/01 06/06/01 06/13/01 06/19/01 06/27/01 07/03/01 07/10/01 07/17/01 07/25/01 08/01/01 08/08/01 08/16/01 08/22/01 08/29/01 09/06/01 09/12/01 09/19/01 09/26/01 10/04/01 10/11/01 10/17/01 10/24/01 11/01/01 11/06/01 11/13/01 11/19/01 10:18 11:44 11:49 9:24 10:00 10:15 15:53 10:38 10:06 10:40 10:51 14:35 14:35 10:16 10:30 10:28 10:37 10:12 9:25 11:40 9:27 10:31 9:15 8:26 9:56 9:59 9:54 9:34 13:27 9:04 10:05 9:56 10:11 11:30 12:02 11:44 11:42 45 40 49 64 50 52 61 66 65 69 64 64 74 76 73 69 80 75 81 80 81 71 71 72 72 67 66 60 61 60 50 64 53 47 47 54 7.81 8.15 7.95 7.9 7.27 8.22 7.92 8.18 8.18 8.34 8.14 8.32 8.10 8.18 8.44 7.96 8.11 7.92 A-227 Nitrate-N (mg/L) 11.37 13.30 11.83 10.82 10.95 12.35 10.19 9.69 8.56 7.84 12.09 16.81 15.53 12.41 10.54 6.99 5.80 1.79 <0.06 <0.06 0.32 0.58 <0.06 0.90 0.96 1.22 0.97 0.61 0.82 1.09 5.20 5.56 8.18 6.77 6.45 5.06 Collection method* Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-5. Continued Date Time (CST) Water temp (F) 11/27/01 12/04/01 12/11/01 12/19/01 12/26/01 01/02/02 01/15/02 01/22/02 01/29/02 01/31/02 02/01/02 02/04/02 02/13/02 02/19/02 02/20/02 02/21/02 02/25/02 03/05/02 03/12/02 03/19/02 03/27/02 03/28/02 03/29/02 03/30/02 04/01/02 04/02/02 04/05/02 04/08/02 04/09/02 04/16/02 04/23/02 04/27/02 04/28/02 04/30/02 05/02/02 05/07/02 05/12/02 10:08 10:31 10:36 14:08 10:56 11:14 10:35 10:37 10:13 15:04 12:45 10:03 10:31 11:47 14:10 11:07 10:23 10:04 10:44 11:24 10:09 11:05 11:40 11:22 10:00 10:09 11:10 13:06 12:05 9:11 9:06 12:16 10:39 9:33 8:01 8:54 9:21 49 49 40 45 33 33 34 34 44 39 38 40 42 46 43 46 35 43 38 41 44 44 46 47 43 49 52 66 50 54 52 54 55 63 56 pH Nitrate-N (mg/L) Collection method* 8.05 8.09 8.26 8.13 8.14 7.90 7.94 8.23 8.07 7.72 - 4.92 10.17 8.28 13.04 11.25 11.03 7.90 8.09 6.82 7.61 10.64 13.92 12.13 9.47 9.63 11.84 13.36 13.92 13.07 12.39 11.13 10.57 11.97 12.51 13.08 12.73 12.20 11.52 11.66 11.96 12.62 12.08 13.20 14.97 14.92 13.37 12.88 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-228 Table E-5. Continued Date Time (CST) Water temp (F) 05/13/02 05/14/02 05/16/02 05/20/02 05/28/02 06/04/02 06/05/02 06/11/02 06/12/02 06/13/02 06/14/02 06/18/02 06/25/02 07/02/02 07/09/02 07/16/02 07/23/02 07/30/02 08/06/02 08/14/02 08/19/02 08/23/02 08/23/02 08/24/02 08/25/02 08/27/02 08/28/02 09/03/02 09/10/02 09/17/02 09/24/02 10/01/02 10/08/02 10/15/02 10/22/02 10/28/02 11/06/02 11:45 10:14 14:35 11:34 10:06 10:53 12:41 12:15 11:37 15:13 7:51 9:04 8:49 9:14 9:24 12:37 9:26 9:24 10:29 9:50 9:10 9:24 16:35 6:35 10:54 9:22 14:04 10:05 9:13 9:43 9:27 10:07 9:43 9:46 10:01 10:39 10:23 57 58 60 55 64 75 71 71 69 67 66 67 75 78 80 77 77 79 77 73 72 75 75 75 75 77 75 77 68 61 68 56 52 49 50 45 pH Nitrate-N (mg/L) Collection method* 7.37 8.11 8.02 8.14 8.23 8.00 8.07 8.01 8.15 8.12 7.77 7.72 7.57 11.48 9.70 13.56 15.87 14.01 13.36 12.15 13.93 12.20 11.01 9.85 14.61 13.19 11.23 7.94 5.05 2.27 1.94 2.46 1.43 0.77 1.35 1.96 2.66 3.21 5.32 5.55 3.97 1.78 1.55 1.11 0.93 0.98 1.34 0.86 1.19 0.99 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-229 Table E-5. Concluded Date Time (CST) Water temp (F) 11/12/02 11/19/02 11/25/02 12/03/02 12/10/02 12/17/02 12/23/02 12/30/02 01/07/03 02/04/03 02/10/03 02/25/03 03/04/03 03/11/03 03/18/03 03/25/03 03/31/03 04/07/03 04/15/03 04/22/03 04/29/03 05/05/03 05/06/03 05/13/03 05/20/03 05/27/03 06/03/03 06/10/03 06/11/03 06/12/03 06/17/03 06/24/03 07/01/03 07/08/03 11:06 11:02 10:23 11:07 10:53 10:57 10:31 10:37 10:21 11:13 10:37 10:47 10:57 10:29 11:04 10:30 11:10 9:29 10:03 8:58 9:08 11:37 9:33 13:47 11:14 10:08 10:43 9:09 22:30 11:26 10:35 10:09 9:59 10:27 48 46 41 34 36 36 38 37 35 34 35 35 36 35 54 57 48 44 59 55 59 59 53 59 65 62 59 67 70 66 69 75 73 80 pH Nitrate-N (mg/L) Collection method* 7.54 7.71 7.58 7.29 7.57 7.86 7.54 7.99 8.09 8.12 7.76 0.23 0.16 0.60 1.18 1.72 1.52 2.20 3.72 5.59 3.58 3.11 2.93 3.03 2.80 2.91 5.41 3.98 10.23 8.11 5.98 6.05 4.77 11.46 14.04 11.14 9.86 8.50 7.18 5.57 8.20 13.71 10.78 7.84 7.49 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) ISCO: Point sample, peristaltic pump A-230 Table E-6. Nitrate-N Sample Concentrations (WY 1993-2008) for Big Ditch at Champaign County Road 700 East near Fisher (Station 106) Date Time (CST) Water temp (F) 04/19/93 05/07/93 05/14/93 06/03/93 06/14/93 06/22/93 06/29/93 07/06/93 07/22/93 07/29/93 08/09/93 08/12/93 08/13/93 08/16/93 08/24/93 08/31/93 09/08/93 09/14/93 09/24/93 09/30/93 10/07/93 10/12/93 10/18/93 10/19/93 10/20/93 10/21/93 10/28/93 11/02/93 11/08/93 11/15/93 11/23/93 12/01/93 12/09/93 12/15/93 12/28/93 01/12/94 13:30 15:50 16:31 15:35 14:47 11:38 10:11 11:58 17:33 10:56 13:23 15:49 13:10 15:23 13:38 10:59 11:38 11:02 12:23 10:30 9:47 10:17 10:58 9:42 15:00 11:41 14:13 11:21 14:55 11:09 9:33 10:30 10:14 14:05 12:05 10:00 - pH Nitrate-N (mg/L) Collection method* - 13.24 15.28 14.01 14.50 14.80 13.92 13.01 11.02 10.64 10.82 7.92 6.10 8.44 8.07 7.63 4.88 8.47 7.01 7.87 8.30 7.92 8.13 5.14 5.42 6.65 5.33 7.87 6.98 7.15 7.32 8.38 8.72 8.18 8.30 7.90 6.90 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-231 Table E-6. Continued Date Time (CST) Water temp (F) 02/03/94 02/15/94 02/22/94 03/07/94 03/17/94 03/23/94 03/28/94 04/04/94 04/11/94 04/12/94 04/13/94 04/14/94 04/18/94 04/25/94 04/29/94 05/03/94 05/09/94 05/16/94 05/24/94 06/03/94 06/06/94 06/14/94 06/20/94 06/28/94 07/05/94 07/07/94 07/08/94 07/12/94 07/27/94 08/01/94 08/04/94 08/08/94 08/22/94 08/29/94 09/07/94 09/23/94 09/26/94 10/12/94 10:15 10:47 10:16 11:24 14:46 10:41 14:30 10:19 10:45 11:24 15:52 11:11 15:26 15:30 11:17 10:53 14:21 14:39 10:35 14:31 10:21 8:29 9:58 11:42 10:27 13:58 7:51 7:58 12:18 8:01 9:30 8:28 8:09 7:07 6:15 7:27 14:50 9:55 - pH Nitrate-N (mg/L) Collection method* - 6.69 2.81 6.56 6.38 8.48 7.84 7.26 6.76 8.76 3.04 4.57 5.72 7.85 8.86 10.16 10.34 11.02 10.19 10.27 9.35 9.20 8.10 6.87 5.47 2.40 9.03 9.15 7.99 0.49 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-232 Table E-6. Continued Date Time (CST) Water temp (F) 10/18/94 10/25/94 11/01/94 11/07/94 11/14/94 11/21/94 11/29/94 12/05/94 12/13/94 12/21/94 01/11/95 01/18/95 01/23/95 02/01/95 02/16/95 02/24/95 02/27/95 03/07/95 03/08/95 03/09/95 03/14/95 03/22/95 03/22/95 03/29/95 04/04/95 04/10/95 04/10/95 04/11/95 04/11/95 04/12/95 04/25/95 05/02/95 05/10/95 05/17/95 05/23/95 05/30/95 06/05/95 06/12/95 10:13 9:39 16:29 10:29 16:32 9:47 10:24 15:48 15:04 9:44 10:17 14:22 10:35 16:13 15:09 11:05 14:44 15:31 14:35 12:30 11:06 9:24 9:28 11:43 9:58 11:38 15:07 9:55 15:57 10:57 10:19 15:25 12:44 11:30 11:47 14:52 11:12 15:16 - pH Nitrate-N (mg/L) Collection method* - <0.02 <0.02 0.07 5.60 6.21 7.04 6.38 6.53 8.76 8.49 7.19 9.93 9.94 9.79 8.41 7.30 7.87 11.17 12.70 12.70 10.92 10.04 10.06 10.99 10.25 10.64 9.68 12.72 12.90 13.04 12.54 12.12 13.58 12.84 14.33 15.10 14.26 15.13 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-233 Table E-6. Continued Date Time (CST) Water temp (F) 06/21/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/04/95 08/08/95 08/16/95 08/22/95 08/31/95 09/06/95 09/12/95 09/19/95 09/26/95 10/05/95 10/11/95 10/17/95 10/24/95 10/27/95 10/27/95 10/28/95 10/29/95 10/31/95 10/31/95 10/31/95 10/31/95 11/01/95 11/02/95 11/03/95 11/03/95 11/05/95 11/07/95 11/07/95 11/07/95 11/08/95 11/11/95 11/13/95 10:24 10:50 9:59 15:09 9:32 14:50 9:21 13:32 10:07 14:40 11:50 11:01 9:46 9:44 9:57 15:41 10:20 9:35 9:37 0:00 9:26 20:00 16:00 4:00 8:00 9:15 11:00 3:00 7:00 7:00 11:00 15:00 3:00 10:10 11:00 17:00 5:00 11:58 - pH Nitrate-N (mg/L) Collection method* - 13.96 12.67 8.23 3.39 0.81 <0.02 0.04 5.16 1.23 2.51 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 0.38 <0.02 1.29 1.01 0.33 0.38 0.44 0.57 3.04 7.62 7.88 8.38 9.10 8.63 8.39 8.59 7.80 7.63 9.01 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab A-234 Table E-6. Continued Date Time (CST) Water temp (F) 11/14/95 11/16/95 11/18/95 11/20/95 11/23/95 11/27/95 11/30/95 12/05/95 12/07/95 12/14/95 12/14/95 12/18/95 12/18/95 12/22/95 12/28/95 01/17/96 01/17/96 01/18/96 01/19/96 01/21/96 01/22/96 01/23/96 01/25/96 01/29/96 02/08/96 02/09/96 02/11/96 02/13/96 02/14/96 02/20/96 02/21/96 02/25/96 02/26/96 02/26/96 02/27/96 02/28/96 03/05/96 03/06/96 12:22 12:00 12:00 10:45 12:00 11:25 12:00 9:38 18:00 13:10 13:20 11:12 18:00 9:14 9:51 10:25 18:00 12:00 12:00 18:00 10:37 15:35 18:00 13:17 9:42 9:00 0:00 10:59 9:16 11:07 8:00 4:00 8:00 12:00 0:00 9:44 9:29 12:00 - pH Nitrate-N (mg/L) Collection method* - 8.71 8.34 7.55 7.56 7.86 7.36 7.02 6.19 5.22 6.24 6.36 4.87 5.37 6.36 6.83 5.38 5.65 8.19 11.33 11.17 10.78 10.42 10.17 10.07 8.67 8.06 8.17 8.28 8.60 7.93 7.55 7.96 8.10 8.58 9.69 10.80 8.53 8.40 Grab ISCO ISCO Grab ISCO Grab ISCO Grab ISCO Grab ISCO Grab ISCO Grab Grab ISCO ISCO ISCO Grab ISCO Grab Grab ISCO Grab Grab ISCO ISCO Grab Grab Grab ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO A-235 Table E-6. Continued Date Time (CST) Water temp (F) 03/07/96 03/10/96 03/11/96 03/18/96 03/22/96 03/23/96 03/24/96 03/26/96 03/27/96 03/28/96 03/30/96 03/31/96 03/31/96 03/31/96 03/31/96 03/31/96 03/31/96 04/01/96 04/01/96 04/01/96 04/02/96 04/03/96 04/05/96 04/05/96 04/07/96 04/12/96 04/14/96 04/17/96 04/20/96 04/22/96 04/23/96 04/23/96 04/24/96 04/25/96 04/26/96 04/28/96 04/29/96 04/30/96 13:20 18:00 12:01 9:42 16:35 10:00 6:00 2:00 14:01 2:00 14:00 2:00 6:00 10:00 14:00 18:00 22:00 2:00 10:12 18:00 2:00 18:00 6:00 10:00 22:00 2:00 4:00 14:40 11:00 11:00 9:41 11:00 19:00 11:00 3:00 3:00 11:00 3:00 - pH Nitrate-N (mg/L) Collection method* - 10.06 8.44 8.34 8.70 8.36 8.28 8.22 7.11 7.46 7.78 7.33 7.26 7.54 7.29 7.15 9.08 10.22 9.54 10.69 10.93 10.87 10.52 10.41 10.26 9.94 9.02 8.56 8.04 7.36 7.59 12.18 11.69 11.22 11.15 10.83 10.17 11.65 12.19 Grab ISCO Grab Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO A-236 Table E-6. Continued Date Time (CST) Water temp (F) 04/30/96 05/01/96 05/03/96 05/05/96 05/06/96 05/07/96 05/08/96 05/08/96 05/08/96 05/08/96 05/09/96 05/09/96 05/09/96 05/10/96 05/10/96 05/10/96 05/10/96 05/11/96 05/13/96 05/15/96 05/15/96 05/16/96 05/16/96 05/17/96 05/20/96 05/21/96 05/24/96 05/26/96 05/26/96 05/27/96 05/27/96 05/27/96 05/28/96 05/28/96 05/28/96 05/28/96 05/28/96 05/29/96 11:07 7:00 7:00 7:00 10:31 1:00 1:00 7:00 13:00 19:00 1:00 7:00 19:00 7:00 13:00 16:14 19:00 1:00 13:13 7:00 19:00 7:00 19:00 7:00 13:27 7:00 7:00 7:00 19:00 7:00 13:00 19:00 1:00 7:00 12:36 13:00 19:00 1:00 - pH Nitrate-N (mg/L) Collection method* - 12.46 12.10 11.52 10.83 13.82 13.67 13.20 13.12 13.41 15.40 14.14 15.46 15.13 15.05 15.56 6.57 7.49 10.11 14.17 15.43 13.36 15.74 15.62 15.62 15.11 14.93 14.42 15.06 14.75 6.61 9.36 12.21 14.17 14.79 14.94 15.40 12.74 12.40 Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO A-237 Table E-6. Continued Date Time (CST) Water temp (F) 05/29/96 05/30/96 05/31/96 06/01/96 06/01/96 06/02/96 06/02/96 06/02/96 06/03/96 06/04/96 06/04/96 06/07/96 06/09/96 06/11/96 06/14/96 06/17/96 06/18/96 06/20/96 06/23/96 06/25/96 06/27/96 06/30/96 07/01/96 07/04/96 07/06/96 07/08/96 07/10/96 07/13/96 07/15/96 07/18/96 07/22/96 07/22/96 07/22/96 07/23/96 07/25/96 07/29/96 08/03/96 08/05/96 7:00 13:00 19:00 7:00 19:00 1:00 7:00 19:00 7:00 7:00 11:13 1:00 1:00 10:20 1:00 1:00 10:11 1:00 1:00 9:58 1:00 1:00 12:00 1:00 13:00 15:28 7:00 7:00 11:57 1:00 1:00 11:14 13:00 1:00 13:00 12:03 13:00 10:28 - pH Nitrate-N (mg/L) Collection method* - 14.90 16.97 17.04 16.94 17.16 11.80 10.79 15.18 15.37 18.03 16.50 15.76 13.86 10.97 17.07 13.11 15.60 16.64 14.95 14.49 16.01 14.51 14.31 13.56 12.49 12.13 11.59 9.44 9.19 7.29 9.42 12.11 11.91 12.07 8.96 6.49 5.39 4.19 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO Grab A-238 Table E-6. Continued Date Time (CST) Water temp (F) 08/08/96 08/12/96 08/19/96 08/19/96 08/20/96 08/26/96 09/03/96 09/09/96 09/17/96 09/24/96 10/01/96 10/09/96 10/16/96 10/21/96 10/30/96 11/06/96 11/12/96 11/18/96 12/02/96 12/10/96 12/30/96 01/07/97 01/22/97 02/04/97 02/05/97 02/13/97 02/18/97 02/21/97 02/27/97 03/04/97 03/10/97 03/11/97 03/14/97 03/20/97 03/25/97 04/01/97 04/08/97 04/15/97 13:00 11:03 1:00 13:00 10:28 12:17 10:37 15:34 15:18 11:07 9:30 14:00 10:43 14:18 15:04 11:24 12:48 15:37 11:26 15:58 13:03 11:52 11:15 11:12 11:56 12:03 10:55 12:25 15:38 11:45 14:44 11:40 9:34 11:16 14:56 9:59 10:41 14:32 - pH Nitrate-N (mg/L) Collection method* - 0.89 0.14 4.89 2.77 4.82 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 0.34 <0.02 6.22 5.16 7.53 10.45 5.12 4.79 6.60 9.74 8.87 7.71 7.80 12.01 13.02 13.14 9.14 12.96 12.39 11.52 10.62 10.06 ISCO Grab ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-239 Table E-6. Continued Date Time (CST) Water temp (F) 04/23/97 05/01/97 05/03/97 05/03/97 05/03/97 05/04/97 05/04/97 05/04/97 05/05/97 05/06/97 05/06/97 05/08/97 05/10/97 05/12/97 05/12/97 05/14/97 05/16/97 05/18/97 05/19/97 05/19/97 05/20/97 05/21/97 05/23/97 05/24/97 05/24/97 05/24/97 05/25/97 05/25/97 05/25/97 05/25/97 05/26/97 05/27/97 05/27/97 05/28/97 05/29/97 05/30/97 05/31/97 06/01/97 11:03 17:40 13:23 13:42 18:00 0:01 6:00 12:00 6:00 10:15 12:00 12:00 6:00 14:27 14:35 6:00 6:00 6:00 13:53 14:06 18:00 0:00 6:00 0:00 12:00 18:00 0:00 6:00 12:00 18:00 6:00 15:02 15:13 18:00 12:00 0:01 6:00 12:00 - pH Nitrate-N (mg/L) Collection method* - 10.15 8.49 12.95 12.63 13.33 13.97 13.87 13.58 13.46 12.31 12.78 12.11 7.82 11.51 11.71 11.38 11.07 10.58 9.55 10.04 9.41 10.02 9.78 8.25 9.37 9.14 17.39 10.96 14.41 17.36 16.95 16.21 17.03 16.36 16.06 16.01 15.77 15.90 Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO A-240 Table E-6. Continued Date Time (CST) Water temp (F) 06/02/97 06/02/97 06/02/97 06/03/97 06/04/97 06/04/97 06/05/97 06/06/97 06/06/97 06/07/97 06/07/97 06/07/97 06/07/97 06/08/97 06/08/97 06/08/97 06/08/97 06/09/97 06/09/97 06/09/97 06/09/97 06/10/97 06/11/97 06/12/97 06/12/97 06/13/97 06/13/97 06/13/97 06/13/97 06/13/97 06/13/97 06/13/97 06/13/97 06/14/97 06/15/97 06/16/97 06/16/97 06/17/97 12:00 15:08 15:18 6:00 0:01 18:00 12:00 6:00 18:00 0:01 6:00 12:00 18:00 0:01 6:00 12:00 18:00 0:01 6:00 10:16 10:23 12:00 18:00 12:00 20:15 2:15 4:15 6:15 8:15 10:15 14:15 14:32 14:40 10:00 6:00 2:00 16:00 2:00 - pH Nitrate-N (mg/L) Collection method* - 15.26 15.32 16.92 16.87 16.86 17.08 16.48 16.22 15.83 4.01 9.51 12.96 13.91 14.27 14.59 9.27 10.75 13.41 14.12 14.23 14.76 15.70 16.85 16.16 13.42 13.67 13.50 13.76 13.80 14.58 15.36 14.79 15.47 16.23 16.15 15.99 16.34 16.15 ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO A-241 Table E-6. Continued Date Time (CST) Water temp (F) 06/17/97 06/17/97 06/23/97 06/24/97 06/24/97 06/25/97 06/26/97 06/26/97 06/27/97 06/28/97 06/29/97 06/30/97 06/30/97 06/30/97 06/30/97 06/30/97 07/01/97 07/01/97 07/01/97 07/01/97 07/01/97 07/01/97 07/01/97 07/01/97 07/01/97 07/08/97 07/15/97 07/22/97 07/23/97 07/28/97 08/05/97 08/12/97 08/19/97 08/26/97 09/03/97 09/10/97 09/19/97 09/24/97 10:05 10:12 8:00 10:05 10:17 18:00 0:01 6:00 0:01 0:01 6:00 12:00 16:51 18:00 20:00 22:00 0:01 2:00 4:00 6:00 8:00 10:00 12:00 14:00 15:24 10:33 10:21 16:11 11:11 11:16 10:51 10:25 10:43 11:24 10:54 10:32 10:42 11:07 - pH Nitrate-N (mg/L) Collection method* - 16.31 16.39 14.95 14.64 14.73 10.37 7.35 10.13 13.21 14.09 14.15 14.09 13.94 13.67 10.06 12.16 6.74 5.21 7.46 7.73 8.26 8.79 9.21 9.70 10.83 12.94 9.99 5.97 7.04 1.91 <0.08 <0.08 5.49 1.70 <0.08 2.61 <0.04 <0.04 Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-242 Table E-6. Continued Date Time (CST) Water temp (F) 10/01/97 10/07/97 10/16/97 10/21/97 10/27/97 11/04/97 11/12/97 11/18/97 11/25/97 12/04/97 12/09/97 12/16/97 12/22/97 12/29/97 01/06/98 01/14/98 01/27/98 02/03/98 02/10/98 02/17/98 02/19/98 02/25/98 03/03/98 03/08/98 03/08/98 03/08/98 03/08/98 03/08/98 03/08/98 03/09/98 03/09/98 03/09/98 03/09/98 03/09/98 03/09/98 03/09/98 03/11/98 03/17/98 10:38 10:45 10:37 10:14 12:18 10:02 11:21 10:55 11:56 11:19 14:58 10:54 10:46 10:36 10:32 10:55 10:54 11:39 10:49 10:46 10:35 15:53 10:58 10:07 12:00 14:00 16:00 20:00 22:00 0:01 2:00 4:00 6:00 8:00 10:00 12:00 10:50 11:04 - pH Nitrate-N (mg/L) Collection method* - <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 0.32 0.70 0.43 7.08 5.70 7.29 6.33 9.45 9.63 11.64 9.62 10.46 9.81 9.36 12.22 10.84 10.48 10.32 10.53 10.82 11.48 11.64 11.38 11.26 10.02 10.25 11.41 11.85 11.76 11.02 13.22 9.86 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab A-243 Table E-6. Continued Date Time (CST) Water temp (F) 03/17/98 03/17/98 03/17/98 03/17/98 03/18/98 03/18/98 03/18/98 03/18/98 03/18/98 03/18/98 03/18/98 03/18/98 03/19/98 03/19/98 03/19/98 03/19/98 03/19/98 03/19/98 03/20/98 03/20/98 03/20/98 03/20/98 03/20/98 03/20/98 03/21/98 03/21/98 03/21/98 03/21/98 03/21/98 03/23/98 04/02/98 04/08/98 04/14/98 04/15/98 04/21/98 04/29/98 04/29/98 04/30/98 11:13 15:00 18:00 21:00 0:01 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:01 3:00 9:55 10:05 18:00 22:00 2:00 6:00 10:00 14:00 18:00 22:00 2:00 6:00 10:00 14:00 18:00 11:56 11:24 11:03 10:57 13:05 10:30 10:48 10:58 0:01 - pH Nitrate-N (mg/L) Collection method* - 8.43 6.86 7.54 5.50 5.76 6.69 7.33 7.75 8.00 9.63 8.54 8.75 9.07 9.49 11.29 9.70 11.42 10.14 9.75 8.64 6.16 5.29 5.26 6.22 7.12 7.73 8.18 7.46 7.46 10.30 11.83 13.46 10.15 12.31 12.75 11.90 10.61 10.84 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab ISCO Grab ISCO A-244 Table E-6. Continued Date Time (CST) Water temp (F) 04/30/98 04/30/98 05/01/98 05/01/98 05/01/98 05/02/98 05/02/98 05/02/98 05/03/98 05/03/98 05/03/98 05/03/98 05/03/98 05/03/98 05/03/98 05/03/98 05/04/98 05/04/98 05/04/98 05/04/98 05/04/98 05/05/98 05/05/98 05/05/98 05/06/98 05/06/98 05/06/98 05/07/98 05/07/98 05/07/98 05/07/98 05/08/98 05/08/98 05/08/98 05/08/98 05/09/98 05/09/98 05/12/98 10:52 12:00 3:00 15:00 21:00 3:00 15:30 15:36 2:00 5:00 8:00 11:00 14:00 17:00 20:00 23:00 2:00 5:00 6:20 14:00 22:00 6:00 14:00 22:00 6:00 11:27 18:00 0:01 6:00 12:00 18:00 0:01 6:00 12:00 18:00 6:00 18:00 10:56 - pH Nitrate-N (mg/L) Collection method* - 15.54 14.80 15.11 14.96 15.06 14.29 14.67 13.39 14.77 14.61 12.99 10.89 10.34 10.15 10.88 11.75 12.29 12.35 12.78 12.97 13.66 13.90 14.08 14.18 14.45 14.47 14.58 14.94 12.99 14.23 14.53 13.86 12.65 11.94 12.66 13.93 14.60 13.55 Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab A-245 Table E-6. Continued Date Time (CST) Water temp (F) 05/19/98 05/20/98 05/22/98 05/24/98 05/27/98 06/03/98 06/04/98 06/05/98 06/08/98 06/08/98 06/08/98 06/08/98 06/09/98 06/09/98 06/09/98 06/09/98 06/09/98 06/09/98 06/09/98 06/09/98 06/10/98 06/10/98 06/10/98 06/10/98 06/10/98 06/11/98 06/11/98 06/11/98 06/11/98 06/11/98 06/12/98 06/12/98 06/12/98 06/12/98 06/12/98 06/13/98 06/13/98 06/14/98 10:53 10:30 10:30 7:09 10:26 10:46 15:45 9:55 14:28 14:44 18:00 22:00 2:00 6:00 10:00 11:24 14:00 15:48 18:00 22:00 2:00 6:00 10:00 13:13 14:00 2:00 10:58 16:02 21:34 22:00 2:00 6:00 10:59 16:52 22:00 7:42 18:00 2:00 - pH Nitrate-N (mg/L) Collection method* - 14.66 14.01 14.00 14.90 14.88 12.55 12.37 12.25 12.74 13.07 13.06 13.03 12.42 12.95 13.83 12.84 14.44 13.49 14.01 13.57 13.99 12.58 13.85 12.67 15.23 14.72 11.85 14.91 14.91 15.09 16.60 15.35 15.39 13.33 16.58 13.27 16.27 16.02 Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO Grab Grab Grab ISCO ISCO ISCO Grab Grab ISCO Grab ISCO ISCO A-246 Table E-6. Continued Date Time (CST) Water temp (F) 06/14/98 06/14/98 06/14/98 06/14/98 06/15/98 06/15/98 06/15/98 06/15/98 06/15/98 06/15/98 06/15/98 06/16/98 06/16/98 06/16/98 06/16/98 06/16/98 06/16/98 06/16/98 06/16/98 06/17/98 06/17/98 06/17/98 06/17/98 06/17/98 06/17/98 06/17/98 06/18/98 06/18/98 06/18/98 06/18/98 06/19/98 06/19/98 06/20/98 06/21/98 06/22/98 07/08/98 07/15/98 07/22/98 8:39 14:00 20:09 22:00 2:00 6:00 10:00 12:44 14:00 18:00 22:00 2:00 6:00 10:00 10:42 14:00 14:48 18:00 22:00 2:00 6:00 10:00 10:31 14:00 18:00 22:00 2:00 6:00 10:00 14:20 10:17 14:05 12:05 7:30 12:08 12:41 11:08 10:47 - pH Nitrate-N (mg/L) Collection method* - 15.53 15.17 13.69 12.08 13.66 12.86 13.73 11.77 14.30 14.35 15.11 15.39 6.96 6.19 5.74 5.69 5.28 6.93 7.56 8.03 6.64 7.42 7.26 9.17 9.34 9.68 9.94 10.26 10.66 10.32 7.55 9.20 11.40 11.94 15.67 11.36 11.27 7.59 Grab ISCO Grab ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab A-247 Table E-6. Continued Date Time (CST) Water temp (F) 07/28/98 08/04/98 08/12/98 08/25/98 09/02/98 09/9/98 09/16/98 09/22/98 09/30/98 10/06/98 10/14/98 10/20/98 10/29/98 11/04/98 11/12/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 12/21/98 01/19/99 01/25/99 02/02/99 02/09/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/25/99 03/30/99 04/05/99 04/06/99 04/08/99 04/13/99 04/14/99 04/14/99 15:10 13:58 15:57 15:01 16:13 10:54 10:12 11:51 10:41 11:15 10:38 10:08 15:17 11:29 10:05 10:50 11:00 10:30 10:22 10:51 10:15 11:24 11:01 10:45 11:00 11:13 10:30 15:57 10:11 10:43 10:04 10:58 15:03 10:28 9:27 11:05 15:31 15:46 - pH Nitrate-N (mg/L) Collection method* - 7.89 3.14 5.97 0.18 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 <0.09 0.25 1.27 0.48 0.29 <0.09 <0.09 0.44 1.28 2.33 11.34 12.44 12.63 12.85 12.56 13.25 12.64 12.82 12.18 11.76 10.98 11.44 11.32 11.95 11.82 11.75 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO A-248 Table E-6. Continued Date Time (CST) Water temp (F) 04/14/99 04/15/99 04/15/99 04/15/99 04/15/99 04/16/99 04/16/99 04/16/99 04/16/99 04/17/99 04/17/99 04/17/99 04/17/99 04/18/99 04/18/99 04/18/99 04/19/99 04/19/99 04/19/99 04/20/99 04/27/99 05/05/99 05/11/99 05/17/99 05/18/99 05/21/99 05/22/99 05/25/99 06/01/99 06/02/99 06/04/99 06/05/99 06/9/99 06/10/99 06/10/99 06/10/99 06/11/99 06/11/99 18:00 0:01 6:00 12:00 18:00 0:01 6:00 12:00 18:00 0:01 6:00 11:23 16:00 0:01 8:00 16:00 0:01 8:00 16:00 10:50 10:48 11:06 10:28 9:40 10:29 13:58 7:05 10:50 16:09 13:25 19:29 7:22 15:06 10:02 10:21 18:00 0:01 12:00 - pH Nitrate-N (mg/L) Collection method* - 11.64 12.35 11.57 12.61 13.96 16.33 17.80 18.04 16.77 16.37 16.17 16.31 16.42 16.60 16.56 16.58 16.58 25.20 16.41 15.50 14.87 13.92 13.09 14.57 15.15 14.51 14.36 13.97 12.97 18.80 11.94 16.88 14.88 14.80 15.07 15.12 15.01 14.83 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO A-249 Table E-6. Continued Date Time (CST) Water temp (F) 06/12/99 06/12/99 06/12/99 06/13/99 06/13/99 06/13/99 06/13/99 06/14/99 06/14/99 06/15/99 06/15/99 06/16/99 06/21/99 07/01/99 07/08/99 07/13/99 07/20/99 07/21/99 07/27/99 07/28/99 07/29/99 08/03/99 08/11/99 08/17/99 08/24/99 08/31/99 09/07/99 09/15/99 09/22/99 09/28/99 10/13/99 10/18/99 10/26/99 11/01/99 11/08/99 11/15/99 11/22/99 11/29/99 0:01 12:00 21:05 0:01 12:00 20:07 20:17 9:57 12:00 11:12 12:00 12:00 10:28 9:51 9:25 11:15 15:52 9:58 10:52 10:37 10:58 10:47 10:10 10:51 11:06 10:56 10:50 10:20 11:04 11:11 14:30 10:31 10:53 10:47 10:02 10:44 9:31 10:45 47 60 49 43 49 37 pH Nitrate-N (mg/L) Collection method* - 14.81 14.53 13.43 13.34 13.84 14.01 14.37 13.75 14.09 13.64 13.77 13.30 12.09 8.95 4.86 1.27 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.11 <0.13 <0.13 <0.13 <0.13 <0.13 <0.13 ISCO ISCO Grab ISCO ISCO Grab ISCO Grab ISCO Grab ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-250 Table E-6. Continued Date Time (CST) Water temp (F) 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 02/09/00 02/15/00 02/22/00 02/29/00 03/07/00 03/14/00 03/21/00 03/28/00 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/28/00 05/30/00 06/06/00 06/13/00 06/20/00 06/24/00 06/26/00 07/03/00 07/10/00 07/17/00 07/24/00 08/01/00 08/07/00 08/15/00 08/22/00 08/29/00 10:16 10:15 10:30 10:25 10:13 9:45 11:50 9:50 11:19 10:16 16:13 10:01 10:22 10:34 9:38 9:17 9:48 9:24 9:16 8:53 9:05 14:12 9:58 8:39 9:15 8:30 9:13 8:50 10:33 9:17 9:45 10:58 13:00 15:19 8:32 8:20 8:48 9:16 39 36 33 38 40 33 33 34 42 46 67 43 48 46 45 47 50 53 59 69 60 77 63 63 61 68 70 67 71 69 75 80 81 86 74 76 75 pH Nitrate-N (mg/L) Collection method* - 1.03 0.13 0.92 0.53 1.20 0.52 0.96 3.76 7.30 7.15 6.61 6.92 11.74 9.37 8.40 7.23 8.13 8.76 7.37 5.41 8.83 7.59 19.54 16.98 12.71 16.69 10.58 14.38 14.83 12.57 9.13 4.50 0.39 0.33 <0.06 <0.06 <0.06 <0.06 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-251 Table E-6. Continued Date Time (CST) Water temp (F) 09/05/00 09/12/00 09/19/00 09/26/00 10/03/00 10/05/00 10/10/00 10/17/00 10/24/00 10/30/00 11/08/00 11/09/00 11/09/00 11/09/00 11/10/00 11/14/00 11/14/00 11/20/00 11/28/00 12/05/00 12/13/00 01/16/01 01/23/01 01/29/01 01/29/01 01/29/01 01/29/01 01/29/01 01/29/01 01/29/01 01/29/01 01/29/01 01/29/01 01/30/01 01/30/01 01/30/01 01/30/01 01/30/01 8:52 8:16 8:10 8:38 8:18 15:03 8:40 8:55 8:45 10:42 16:35 12:12 13:55 16:04 20:30 9:45 11:05 9:22 9:15 9:20 9:15 10:48 10:40 18:28 19:28 20:28 21:13 21:28 21:43 21:58 22:13 22:28 23:43 10:10 12:46 13:01 13:16 13:31 63 70 63 51 62 44 56 63 53 52 47 46 46 44 33 38 32 32 33 35 34 - pH Nitrate-N (mg/L) Collection method* - <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 2.92 1.43 0.23 <0.06 1.99 2.07 3.00 7.87 11.71 12.15 12.18 12.18 11.19 10.66 10.86 8.18 9.20 2.70 2.90 2.48 2.50 2.46 2.46 2.45 2.55 2.58 2.56 3.88 4.39 4.43 4.49 4.52 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO Grab ISCO Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO A-252 Table E-6. Continued Date Time (CST) Water temp (F) 01/30/01 01/30/01 01/30/01 01/30/01 01/30/01 02/06/01 02/08/01 02/09/01 02/09/01 02/09/01 02/13/01 02/14/01 02/14/01 02/14/01 02/14/01 02/15/01 02/15/01 02/15/01 02/16/01 02/20/01 02/24/01 02/24/01 02/24/01 02/24/01 02/24/01 02/24/01 02/25/01 02/25/01 02/25/01 02/25/01 02/25/01 02/25/01 02/25/01 02/26/01 02/26/01 02/26/01 02/26/01 02/26/01 13:46 14:01 14:46 15:01 15:16 10:10 17:15 10:30 12:28 15:28 15:05 12:08 15:28 18:28 21:28 0:28 3:28 6:28 22:13 9:29 14:28 15:13 16:43 18:13 21:13 23:13 0:13 3:13 11:17 12:13 15:13 18:13 21:13 0:13 3:13 6:13 9:13 12:13 38 44 42 42 40 41 - pH Nitrate-N (mg/L) Collection method* - 4.56 4.59 4.73 4.75 4.77 10.20 8.74 10.35 10.52 10.52 12.92 11.68 11.66 10.60 10.80 11.27 11.63 12.03 13.82 13.34 7.26 5.85 4.95 5.04 4.69 4.45 4.20 4.51 5.94 6.41 7.36 8.18 8.81 9.24 9.58 9.92 10.24 10.24 ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO A-253 Table E-6. Continued Date Time (CST) Water temp (F) 02/26/01 02/26/01 02/26/01 02/27/01 03/01/01 03/06/01 03/15/01 03/21/01 03/27/01 04/03/01 04/10/01 04/17/01 04/24/01 05/01/01 05/09/01 05/16/01 05/22/01 05/30/01 06/04/01 06/06/01 06/06/01 06/06/01 06/06/01 06/06/01 06/06/01 06/06/01 06/7/01 06/7/01 06/13/01 06/19/01 06/27/01 07/03/01 07/10/01 07/17/01 07/25/01 08/01/01 08/08/01 08/16/01 15:13 18:13 21:13 10:40 7:58 9:35 9:45 10:38 10:48 8:26 9:00 8:36 9:40 8:15 9:38 9:37 15:32 8:49 15:27 10:48 10:50 11:39 14:29 17:29 20:29 23:29 2:29 5:29 12:50 8:50 9:33 11:20 9:04 8:30 9:25 8:26 10:34 8:34 39 46 42 46 58 41 59 62 65 74 65 60 63 67 77 72 67 80 75 81 78 69 pH Nitrate-N (mg/L) Collection method* 7.89 7.83 8.28 7.97 8.07 8.36 7.69 6.36 8.14 8.28 7.98 8.26 - 10.19 10.25 10.38 10.68 11.87 13.49 13.01 13.78 13.33 12.35 10.95 12.89 11.82 11.16 9.90 9.61 13.30 12.57 14.87 17.95 18.07 18.10 19.53 18.05 18.01 18.39 18.88 18.73 15.17 13.18 10.03 5.91 2.85 0.06 <0.06 <0.06 <0.06 <0.06 ISCO ISCO ISCO Grab ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-254 Table E-6. Continued Date Time (CST) Water temp (F) 08/22/01 08/29/01 09/06/01 09/12/01 09/19/01 09/26/01 10/04/01 10/11/01 10/17/01 10/24/01 10/25/01 10/26/01 11/01/01 11/06/01 11/13/01 11/19/01 11/27/01 12/04/01 12/11/01 12/17/01 12/17/01 12/17/01 12/19/01 12/20/01 12/26/01 01/02/02 01/08/02 01/15/02 01/22/02 01/29/02 01/31/02 02/01/02 02/04/02 02/13/02 02/19/02 02/19/02 02/19/02 02/19/02 9:57 9:00 9:10 8:46 8:54 8:56 9:23 9:29 9:08 10:01 3:41 11:33 10:41 10:36 10:22 10:36 9:20 9:30 9:25 15:40 16:53 19:53 15:38 6:28 9:53 9:52 9:19 9:34 9:28 9:14 14:05 13:28 9:13 9:08 10:04 12:45 15:15 15:45 71 70 72 66 65 54 61 62 48 66 54 49 47 52 47 52 35 45 33 33 33 34 34 46 39 40 36 39 43 - pH Nitrate-N (mg/L) Collection method* 8.13 8.21 8.00 8.26 8.25 8.37 8.15 8.25 8.06 8.31 8.07 8.17 - 1.21 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 5.84 4.10 6.38 8.45 7.79 6.66 6.41 4.32 3.85 9.40 8.61 12.82 12.99 13.17 13.09 12.66 12.13 12.01 11.24 10.09 9.70 8.75 11.57 12.96 14.90 14.03 12.42 12.75 14.03 13.86 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO Grab ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO A-255 Table E-6. Continued Date Time (CST) Water temp (F) 02/19/02 02/19/02 02/19/02 02/20/02 02/20/02 02/20/02 02/20/02 02/20/02 02/20/02 02/20/02 02/20/02 02/20/02 02/21/02 02/21/02 02/21/02 02/21/02 02/21/02 02/21/02 02/21/02 02/21/02 02/22/02 02/22/02 02/25/02 03/05/02 03/09/02 03/09/02 03/09/02 03/09/02 03/09/02 03/10/02 03/12/02 03/16/02 03/19/02 03/27/02 03/28/02 03/28/02 03/29/02 03/29/02 18:00 18:45 21:45 0:45 3:45 6:45 9:45 12:45 15:10 15:45 18:45 21:45 0:45 3:45 6:45 9:45 12:45 15:45 18:45 21:45 0:45 9:48 9:26 9:05 11:59 14:59 17:59 20:59 23:59 8:59 9:51 13:00 9:06 9:15 13:18 21:30 0:15 3:15 45 40 45 37 44 45 38 45 - pH Nitrate-N (mg/L) Collection method* 8.10 8.45 8.31 - 11.90 11.26 10.56 9.72 9.65 10.31 10.69 11.10 11.31 11.46 11.69 12.05 12.42 12.74 12.96 13.13 13.20 13.57 13.63 13.76 13.89 14.07 14.67 14.91 13.10 13.10 12.11 12.29 12.89 14.37 14.94 14.21 14.30 12.44 12.19 14.80 14.79 14.70 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab Grab Grab ISCO ISCO ISCO A-256 Table E-6. Continued Date Time (CST) Water temp (F) 03/29/02 03/29/02 03/29/02 03/29/02 03/29/02 03/29/02 03/30/02 03/30/02 03/30/02 03/30/02 03/30/02 04/02/02 04/03/02 04/08/02 04/16/02 04/23/02 04/27/02 04/27/02 04/27/02 04/27/02 04/27/02 04/27/02 04/27/02 04/28/02 04/28/02 04/28/02 04/28/02 04/28/02 04/28/02 04/28/02 04/28/02 04/28/02 04/29/02 04/29/02 04/29/02 04/29/02 04/29/02 04/29/02 6:15 9:15 14:41 16:00 19:00 22:00 1:00 4:00 7:00 10:00 13:00 9:23 9:29 12:28 8:12 8:15 11:32 14:59 16:59 17:59 20:14 20:59 23:59 2:59 5:59 8:26 8:59 11:59 14:59 17:59 20:59 23:59 2:59 5:59 8:59 11:59 14:59 17:59 44 47 48 62 48 50 51 - pH Nitrate-N (mg/L) Collection method* 7.78 - 14.52 14.78 15.29 14.85 14.84 14.53 13.94 13.90 13.57 13.93 14.36 14.56 14.18 13.76 13.85 16.00 14.42 14.20 15.90 17.34 15.89 15.48 14.72 15.14 15.82 16.29 16.18 16.63 16.81 16.95 17.12 17.11 17.22 17.41 17.30 17.36 17.31 17.39 ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO A-257 Table E-6. Continued Date Time (CST) Water temp (F) 04/30/02 04/30/02 05/01/02 05/06/02 05/07/02 05/09/02 05/11/02 05/11/02 05/11/02 05/11/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/12/02 05/13/02 05/13/02 05/13/02 05/13/02 05/13/02 05/13/02 05/13/02 05/13/02 05/13/02 05/14/02 05/14/02 05/14/02 05/14/02 05/14/02 05/14/02 05/14/02 8:32 8:59 15:05 9:36 8:01 9:05 14:14 17:14 20:14 23:14 2:14 5:14 8:09 8:14 9:29 10:29 11:14 14:14 16:00 16:14 19:14 22:14 1:14 4:14 7:14 10:14 13:14 13:51 16:14 19:14 22:14 1:14 4:14 7:14 9:12 10:14 13:14 16:14 51 56 58 59 57 56 54 54 - pH Nitrate-N (mg/L) Collection method* 7.58 7.33 - 17.52 17.30 17.28 16.34 15.74 17.42 14.57 17.06 17.93 16.64 16.73 17.31 18.07 17.87 16.22 13.07 13.15 12.51 13.89 13.28 12.83 13.15 13.90 14.31 14.74 14.98 15.48 15.73 15.93 16.07 16.29 16.28 16.31 16.36 16.63 16.57 16.62 16.78 Grab ISCO Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO A-258 Table E-6. Continued Date Time (CST) Water temp (F) 05/14/02 05/14/02 05/15/02 05/15/02 05/15/02 05/15/02 05/15/02 05/15/02 05/15/02 05/16/02 05/17/02 05/17/02 05/17/02 05/18/02 05/18/02 05/18/02 05/18/02 05/18/02 05/18/02 05/20/02 05/26/02 05/28/02 06/04/02 06/04/02 06/11/02 06/11/02 06/11/02 06/11/02 06/11/02 06/11/02 06/11/02 06/12/02 06/12/02 06/12/02 06/12/02 06/12/02 06/12/02 06/12/02 19:14 22:14 1:14 4:14 7:14 10:14 13:14 16:14 19:14 13:54 1:44 4:44 7:44 0:29 3:29 6:29 9:29 12:29 15:29 10:41 18:44 9:23 8:28 8:48 12:44 13:09 13:59 15:44 15:58 18:44 21:44 0:44 3:44 6:44 9:44 12:31 12:44 15:44 57 55 65 70 67 68 67 - pH Nitrate-N (mg/L) Collection method* 8.40 7.35 - 16.53 16.61 16.63 16.66 16.88 16.77 17.05 17.30 17.16 17.07 17.15 16.87 17.23 18.04 18.09 17.90 18.06 18.19 18.33 18.25 16.98 17.00 16.51 16.56 16.83 14.70 12.58 11.68 11.93 10.81 11.36 12.26 13.50 15.07 15.45 15.89 16.00 16.51 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO Grab ISCO Grab ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO A-259 Table E-6. Continued Date Time (CST) Water temp (F) 06/12/02 06/12/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/13/02 06/14/02 06/14/02 06/14/02 06/14/02 06/14/02 06/14/02 06/14/02 06/14/02 06/14/02 06/15/02 06/15/02 06/15/02 06/15/02 06/15/02 06/15/02 06/15/02 06/18/02 06/25/02 06/26/02 06/27/02 06/29/02 06/29/02 06/29/02 07/02/02 18:44 21:44 0:44 3:44 6:44 7:44 8:29 9:44 10:52 12:44 14:23 15:44 18:44 21:44 0:44 3:44 6:44 8:28 9:44 12:44 15:44 18:44 21:44 0:44 3:44 6:44 9:44 12:44 15:44 18:44 8:21 7:57 6:45 16:00 16:45 19:00 22:00 8:25 63 66 62 64 70 75 pH Nitrate-N (mg/L) Collection method* 7.91 - 16.63 16.70 16.96 17.31 16.94 9.71 8.24 7.56 8.17 6.91 7.63 8.39 12.44 13.45 13.89 14.44 15.10 15.59 15.71 15.99 16.50 16.72 16.80 16.97 17.08 17.10 17.04 17.08 16.69 16.68 17.71 16.08 9.84 12.12 14.40 8.12 6.87 13.86 ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab ISCO ISCO ISCO ISCO ISCO Grab A-260 Table E-6. Continued Date Time (CST) Water temp (F) 07/08/02 07/09/02 07/16/02 07/23/02 07/30/02 08/06/02 08/14/02 08/19/02 08/23/02 08/23/02 08/23/02 08/23/02 08/23/02 08/23/02 08/23/02 08/23/02 08/23/02 08/24/02 08/24/02 08/24/02 08/27/02 09/03/02 09/10/02 09/17/02 09/24/02 10/01/02 10/08/02 10/15/02 10/22/02 10/28/02 11/06/02 11/12/02 11/19/02 11/25/02 12/03/02 12/10/02 12/17/02 12/23/02 9:45 8:40 13:46 8:26 8:27 8:22 8:38 8:19 7:15 7:45 10:15 12:40 13:15 15:22 16:15 19:15 22:15 1:15 4:15 7:43 8:23 8:18 8:23 8:20 8:21 8:28 8:35 8:25 8:14 9:30 9:22 9:29 9:12 9:28 9:54 9:35 9:09 9:31 77 89 77 76 72 72 70 72 73 74 73 73 75 75 64 57 68 52 46 47 48 43 45 41 34 34 39 34 34 pH Nitrate-N (mg/L) Collection method* 8.89 8.18 7.84 8.02 7.88 8.00 7.96 7.78 8.00 8.03 7.83 7.59 9.07 9.57 3.77 <0.06 0.21 <0.06 <0.06 <0.06 3.93 3.36 3.90 3.75 3.85 3.30 3.09 3.34 3.72 4.40 4.84 5.23 6.03 0.86 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 5.08 ISCO Grab Grab Grab Grab Grab Grab Grab ISCO Grab ISCO Grab ISCO Grab ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-261 Table E-6. Continued Date Time (CST) Water temp (F) 12/30/02 01/07/03 02/04/03 02/10/03 02/25/03 03/04/03 03/11/03 03/18/03 03/25/03 03/31/03 04/07/03 04/15/03 04/22/03 04/29/03 05/04/03 05/04/03 05/05/03 05/05/03 05/05/03 05/05/03 05/05/03 05/05/03 05/05/03 05/05/03 05/05/03 05/05/03 05/06/03 05/06/03 05/09/03 05/09/03 05/09/03 05/09/03 05/09/03 05/09/03 05/09/03 05/10/03 05/10/03 05/10/03 9:41 9:22 10:02 9:40 9:44 9:05 9:27 9:31 9:14 9:14 8:39 8:27 8:09 8:18 20:55 21:25 0:25 0:55 3:55 6:55 8:07 9:59 12:59 15:59 18:59 21:59 0:59 8:40 6:29 7:59 9:47 10:59 13:59 16:59 19:59 3:29 6:29 9:29 36 34 34 34 35 36 35 54 56 43 55 57 48 56 54 55 61 - pH Nitrate-N (mg/L) Collection method* 7.64 7.80 7.55 8.16 7.27 - 4.16 5.60 3.96 4.51 3.42 2.85 4.64 3.50 2.69 3.01 8.95 6.81 6.37 6.65 7.41 7.27 13.45 15.55 16.51 14.95 14.90 15.29 15.76 15.79 15.46 15.20 14.84 14.20 14.46 15.04 13.45 12.31 12.55 13.41 13.88 13.74 13.54 13.83 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO A-262 Table E-6. Continued Date Time (CST) Water temp (F) 05/10/03 05/10/03 05/10/03 05/10/03 05/11/03 05/13/03 05/20/03 05/27/03 06/03/03 06/10/03 06/11/03 06/12/03 06/12/03 06/12/03 06/12/03 06/12/03 06/12/03 06/12/03 06/12/03 06/12/03 06/13/03 06/13/03 06/13/03 06/13/03 06/13/03 06/13/03 06/13/03 06/13/03 06/17/03 06/24/03 07/01/03 07/08/03 09/13/05 09/21/05 09/26/05 10/03/05 10/11/05 10/17/05 12:29 15:29 18:29 21:29 0:29 10:00 8:32 8:58 9:03 8:21 21:52 0:29 1:02 3:29 6:29 12:29 12:30 15:29 18:29 21:29 0:29 3:09 6:29 9:29 12:29 15:29 16:29 19:29 9:35 9:08 9:06 9:32 10:53 10:00 14:36 14:06 14:18 13:48 55 61 61 55 64 69 63 65 73 73 80 74 71 72 73 63 63 pH Nitrate-N (mg/L) Collection method* 7.98 7.92 8.42 7.90 7.92 8.06 8.64 8.86 8.67 8.40 13.26 14.86 14.78 14.49 14.93 14.63 12.62 11.44 10.42 8.59 8.34 11.03 10.97 13.68 16.63 17.19 17.07 17.08 17.21 17.22 17.12 16.84 16.82 16.66 16.33 16.32 16.17 16.21 14.62 11.92 9.36 8.65 <0.07 <0.07 0.07 0.09 <0.07 <0.07 ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab ISCO Grab ISCO ISCO ISCO Grab ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO ISCO Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-263 Table E-6. Continued Date Time (CST) Water temp (F) 10/26/05 10/31/05 11/07/05 11/14/05 11/16/05 11/22/05 11/28/05 12/12/05 01/03/06 01/09/06 01/17/06 01/23/06 01/31/06 02/06/06 02/15/06 02/22/06 02/28/06 03/07/06 03/20/06 03/28/06 04/04/06 04/11/06 04/21/06 04/25/06 05/02/06 05/09/06 05/16/06 05/23/06 05/31/06 06/07/06 06/12/06 06/27/06 07/05/06 07/11/06 07/19/06 07/28/06 08/02/06 08/08/06 14:56 14:31 15:31 13:48 10:40 10:19 15:42 11:28 12:43 15:30 14:49 14:24 14:37 16:14 12:04 15:27 12:54 14:48 15:57 10:41 11:59 11:00 12:19 10:52 12:09 14:23 11:00 11:47 10:58 10:59 11:47 13:16 13:43 10:48 10:57 7:28 10:40 12:10 49 55 56 45 40 38 52 33 40 38 40 42 39 42 45 44 48 41 44 49 52 55 48 61 63 59 64 76 74 71 75 78 75 87 73 86 80 pH Nitrate-N (mg/L) Collection method* 8.38 8.17 8.29 8.20 7.81 8.09 7.36 7.85 8.14 8.25 8.04 8.22 8.14 7.91 8.24 8.20 8.17 8.31 8.13 8.15 8.08 7.93 7.45 7.73 7.83 8.20 7.81 8.35 8.07 8.32 8.07 8.49 8.36 7.48 8.55 7.15 7.81 8.31 <0.07 <0.07 4.96 3.98 6.06 5.53 8.84 6.45 8.80 8.14 8.43 9.29 9.94 9.31 8.69 9.82 9.30 8.61 12.37 11.06 12.27 12.90 13.06 13.20 12.87 13.02 13.81 12.69 11.96 11.43 10.96 7.47 7.27 2.92 1.78 8.42 5.69 1.23 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-264 Table E-6. Continued Date Time (CST) Water temp (F) 08/16/06 08/23/06 08/29/06 09/06/06 09/13/06 09/19/06 09/26/06 10/02/06 10/11/06 10/17/06 10/24/06 11/01/06 11/06/06 11/13/06 11/21/06 11/29/06 12/06/06 12/11/06 12/18/06 12/27/06 01/02/07 01/09/07 01/15/07 01/23/07 01/30/07 02/26/07 03/05/07 03/14/07 03/20/07 04/04/07 04/10/07 04/17/07 04/23/07 04/30/07 05/09/07 05/14/07 05/22/07 05/29/07 10:36 11:10 10:46 7:55 10:52 11:28 11:34 10:25 10:55 13:44 11:44 12:10 15:38 13:12 12:00 11:15 13:46 12:28 12:57 16:25 16:00 11:43 13:56 15:49 10:56 16:23 16:30 12:30 13:58 10:18 15:12 11:48 13:41 11:00 15:02 11:37 13:01 8:30 77 80 71 62 66 59 65 65 58 56 46 44 50 46 44 58 44 44 45 43 41 39 43 32 33 56 50 39 54 53 70 63 69 74 66 pH Nitrate-N (mg/L) Collection method* 8.35 8.41 7.98 7.89 7.97 8.20 8.26 8.06 8.15 7.45 8.16 8.62 8.32 8.36 8.24 8.11 7.85 7.86 7.95 7.59 7.77 7.45 8.03 7.86 8.04 8.05 8.33 8.21 8.67 8.37 8.45 8.32 8.45 8.46 8.50 8.18 1.95 <0.07 0.43 0.19 2.19 0.96 0.87 0.40 1.25 8.69 7.66 6.82 6.88 7.71 8.88 7.90 <0.07 10.45 10.72 11.00 11.27 11.63 5.73 10.97 11.41 3.11 7.03 9.71 8.85 10.92 10.73 10.79 10.13 12.59 11.17 10.60 9.34 12.66 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-265 Table E-6. Continued Date Time (CST) Water temp (F) 06/05/07 06/20/07 06/27/07 07/03/07 07/11/07 07/18/07 07/24/07 07/31/07 08/07/07 08/16/07 08/22/07 08/29/07 09/04/07 09/12/07 09/19/07 09/26/07 10/03/07 10/10/07 10/17/07 10/25/07 10/30/07 11/07/07 11/13/07 11/27/07 12/04/07 12/18/07 12/27/07 01/08/08 01/10/08 01/16/08 01/23/08 01/31/08 02/07/08 02/14/08 02/19/08 03/03/08 03/13/08 03/27/08 9:05 10:11 11:10 16:05 9:45 9:15 10:52 13:20 9:10 11:02 9:55 12:42 11:55 11:28 10:59 11:10 16:42 10:20 12:50 11:00 10:55 15:00 14:01 11:08 13:10 11:25 10:20 17:37 11:39 8:40 14:27 10:40 11:15 11:42 10:45 13:40 12:40 9:34 66 75 74 81 74 68 78 84 82 74 81 87 80 62 72 67 75 54 66 49 48 47 56 42 39 40 39 31 37 41 46 44 pH Nitrate-N (mg/L) Collection method* 8.50 8.52 7.86 8.40 8.41 7.66 8.65 8.65 8.00 8.37 7.78 8.42 8.26 8.27 7.74 7.87 8.87 8.00 8.22 7.87 7.91 8.42 8.28 8.20 8.33 8.10 8.53 8.42 8.59 7.65 8.25 8.63 10.06 5.00 10.04 9.09 3.64 4.88 2.57 0.13 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 0.49 8.05 8.70 11.46 11.98 4.27 8.30 12.00 11.74 10.31 4.91 9.91 8.22 7.40 11.86 11.81 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-266 Table E-6. Concluded Date Time (CST) Water temp (F) 04/02/08 04/10/08 04/24/08 05/07/08 05/19/08 05/28/08 06/02/08 06/11/08 06/26/08 07/07/08 07/17/08 07/31/08 08/06/08 08/14/08 08/19/08 08/26/08 09/02/08 09/11/08 09/23/08 09/30/08 10:45 9:55 11:37 11:05 10:20 10:00 11:55 11:48 9:50 13:53 15:11 9:40 13:10 9:55 13:33 14:50 13:40 13:50 10:05 14:57 45 42 63 60 55 69 72 73 85 69 85 82 89 72 66 65 pH Nitrate-N (mg/L) Collection method* 8.02 8.09 8.30 8.45 7.81 7.93 7.94 8.31 7.84 8.33 8.00 7.72 8.43 8.42 8.34 8.21 8.09 8.24 12.06 11.28 11.41 11.94 14.81 13.44 14.70 11.47 12.97 6.83 11.43 7.74 5.97 2.18 0.16 <0.07 <0.07 <0.07 4.75 4.45 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) ISCO: Point sample, peristaltic pump A-267 Table E-7. Nitrate-N Sample Concentrations (WY 1993-2008) for Sangamon River USGS Station #05572000 near Monticello (Station 111) Date Time (CST) Water temp (F) 04/19/93 05/07/93 05/14/93 06/16/93 06/22/93 06/29/93 07/06/93 07/15/93 07/22/93 07/29/93 08/10/93 08/18/93 08/24/93 08/31/93 09/08/93 09/14/93 09/16/93 09/22/93 09/29/93 10/06/93 10/12/93 10/18/93 10/20/93 10/27/93 11/02/93 11/09/93 11/15/93 11/24/93 12/01/93 12/10/93 12/16/93 12/28/93 02/15/94 02/22/94 02/28/94 03/07/94 10:40 13:20 13:50 11:35 15:05 12:41 14:30 15:15 14:08 13:17 10:44 10:25 9:49 14:05 15:17 14:16 10:39 14:50 14:08 14:51 14:18 15:25 10:15 12:09 15:04 13:39 14:38 12:18 13:21 10:22 11:54 15:10 13:30 12:48 13:49 14:20 - pH Nitrate-N (mg/L) Collection method* - 9.44 9.26 10.39 10.48 11.27 9.06 7.07 6.69 8.34 6.62 5.60 6.22 5.93 5.26 3.40 5.37 4.16 6.18 5.73 6.54 6.23 3.57 3.30 5.99 5.48 5.61 4.86 7.49 7.16 6.96 6.97 6.55 4.19 6.27 5.49 6.38 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-268 Table E-7. Continued Date Time (CST) Water temp (F) 03/17/94 03/23/94 03/28/94 04/04/94 04/11/94 04/13/94 04/14/94 04/18/94 04/25/94 04/29/94 05/03/94 05/09/94 05/16/94 05/24/94 06/01/94 06/06/94 06/13/94 06/20/94 06/27/94 07/06/94 07/12/94 07/26/94 08/01/94 09/07/94 09/23/94 10/12/94 10/18/94 10/25/94 11/01/94 11/06/94 11/07/94 11/14/94 11/21/94 11/28/94 12/05/94 12/07/94 12/13/94 12/21/94 13:10 13:04 13:06 11:56 12:45 13:49 13:36 13:51 13:15 12:49 12:51 13:02 13:10 13:30 11:44 13:19 15:08 11:22 11:29 11:12 11:31 10:02 9:47 8:33 9:54 11:56 12:38 12:12 15:29 12:50 13:07 14:08 12:07 14:33 13:50 16:45 13:28 10:47 - pH Nitrate-N (mg/L) Collection method* - 6.78 6.40 5.60 5.43 6.27 2.69 2.92 7.03 6.91 7.52 9.13 9.54 8.69 8.37 7.84 7.04 7.15 5.37 4.84 2.42 5.52 <0.02 <0.02 0.64 0.04 <0.02 0.63 <0.02 <0.02 0.89 0.90 3.89 3.48 4.61 5.61 5.45 8.46 7.26 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-269 Table E-7. Continued Date Time (CST) Water temp (F) 01/17/95 01/23/95 02/01/95 02/22/95 02/24/95 02/24/95 02/27/95 02/27/95 03/08/95 03/08/95 03/16/95 03/22/95 03/28/95 04/05/95 04/11/95 04/12/95 04/25/95 05/02/95 05/10/95 05/17/95 05/22/95 05/31/95 06/05/95 06/12/95 06/21/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/07/95 08/15/95 08/22/95 08/31/95 09/06/95 09/12/95 09/19/95 09/26/95 14:42 13:09 13:42 14:36 13:20 13:47 10:15 10:35 10:17 16:26 13:55 12:24 14:01 10:21 11:30 13:00 12:29 12:55 10:36 16:15 13:43 9:36 13:04 13:37 12:24 12:45 12:00 12:32 11:45 12:07 13:08 15:35 12:50 13:55 12:57 12:41 11:47 13:50 - pH Nitrate-N (mg/L) Collection method* - 8.54 8.64 7.77 5.57 5.02 4.95 5.37 5.28 7.52 8.04 8.86 7.82 7.73 7.97 7.18 9.76 9.99 8.94 10.47 4.51 9.22 10.11 10.49 9.03 10.30 10.08 7.43 4.02 2.71 1.42 1.64 4.47 3.48 1.41 0.61 <0.02 <0.02 <0.02 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-270 Table E-7. Continued Date Time (CST) Water temp (F) 10/05/95 10/11/95 10/17/95 10/24/95 10/31/95 11/01/95 11/02/95 11/07/95 11/15/95 11/20/95 11/28/95 12/05/95 12/15/95 12/18/95 01/18/96 01/23/96 02/14/96 02/20/96 02/27/96 03/05/96 03/11/96 03/18/96 03/28/96 04/02/96 04/09/96 04/16/96 04/23/96 05/01/96 05/07/96 05/09/96 05/13/96 05/21/96 05/28/96 06/04/96 06/11/96 06/19/96 06/25/96 07/02/96 13:32 12:50 11:50 12:18 12:42 13:13 13:54 12:10 10:04 13:11 11:15 11:55 8:50 13:47 14:47 13:44 11:03 13:45 10:46 12:12 14:17 12:00 11:20 14:57 11:39 14:16 12:07 13:57 15:36 15:55 15:41 15:52 16:17 16:30 13:58 11:48 11:52 11:10 - pH Nitrate-N (mg/L) Collection method* - <0.02 0.03 0.14 <0.02 0.09 0.30 0.19 7.51 8.13 7.07 6.35 5.13 5.04 5.28 3.83 9.43 4.98 4.93 4.21 6.27 7.06 4.80 5.75 7.52 7.43 5.74 7.92 10.62 11.15 11.49 8.29 12.59 8.98 10.25 12.49 13.21 12.01 11.46 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-271 Table E-7. Continued Date Time (CST) Water temp (F) 07/08/96 07/15/96 07/22/96 07/30/96 08/05/96 08/13/96 08/27/96 09/03/96 09/09/96 09/17/96 09/24/96 10/01/96 10/09/96 10/16/96 10/22/96 10/30/96 11/08/96 11/12/96 11/19/96 12/02/96 12/10/96 12/18/96 12/30/96 01/07/97 01/22/97 02/04/97 02/13/97 02/18/97 02/21/97 02/27/97 02/28/97 03/04/97 03/11/97 03/14/97 03/19/97 03/25/97 04/01/97 04/09/97 12:35 15:25 15:46 12:52 15:56 11:49 12:30 15:11 13:47 12:57 15:26 11:45 15:38 13:56 15:05 11:59 12:33 15:54 13:35 15:00 12:33 12:20 15:50 15:08 16:08 16:18 14:36 15:30 15:40 13:19 12:11 16:01 15:37 10:56 14:45 12:52 15:19 14:46 - pH Nitrate-N (mg/L) Collection method* - 9.60 6.87 4.18 7.65 7.84 3.18 1.21 0.41 0.16 0.22 0.45 0.72 0.38 0.08 0.02 <0.02 0.65 0.70 0.84 4.58 6.22 7.82 7.79 7.52 5.16 4.58 7.54 7.63 6.08 6.00 5.11 10.10 10.40 9.14 10.79 10.08 8.98 8.92 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-272 Table E-7. Continued Date Time (CST) Water temp (F) 04/15/97 04/22/97 05/01/97 05/06/97 05/13/97 05/20/97 05/28/97 06/03/97 06/09/97 06/17/97 06/24/97 07/01/97 07/08/97 07/15/97 07/22/97 07/28/97 08/05/97 08/12/97 08/19/97 08/26/97 09/03/97 09/10/97 09/12/97 09/24/97 10/01/97 10/07/97 10/15/97 10/21/97 10/27/97 11/04/97 11/12/97 11/18/97 11/25/97 12/04/97 12/11/97 12/16/97 12/22/97 01/06/98 12:36 14:03 14:40 15:52 14:13 14:46 15:45 16:27 15:00 14:43 12:45 12:48 16:30 12:40 12:56 16:14 16:00 14:56 16:25 14:17 16:00 15:37 13:56 15:54 15:53 14:38 14:44 15:49 15:33 15:09 16:05 15:40 15:22 15:56 12:47 15:49 14:12 15:50 - pH Nitrate-N (mg/L) Collection method* - 8.73 8.59 8.08 11.91 8.79 7.73 14.01 13.60 12.84 14.00 12.24 10.94 9.51 7.12 2.89 1.24 0.49 0.39 2.37 3.32 1.07 2.41 1.71 2.30 0.84 <0.04 <0.04 <0.04 <0.04 0.12 0.72 0.57 0.46 6.25 6.64 6.21 5.32 8.13 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-273 Table E-7. Continued Date Time (CST) Water temp (F) 01/14/98 01/27/98 02/03/98 02/10/98 02/17/98 02/19/98 02/24/98 03/03/98 03/17/98 03/19/98 03/24/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/05/98 05/12/98 05/19/98 05/27/98 06/03/98 06/10/98 06/17/98 06/22/98 07/07/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 08/26/98 09/02/98 09/09/98 09/16/98 09/22/98 09/30/98 10/06/98 10/14/98 14:43 15:52 16:40 15:35 16:01 14:06 14:55 15:45 16:13 13:23 15:13 16:06 15:30 15:47 16:22 16:00 14:47 15:46 15:45 15:33 15:30 10:35 15:35 15:27 15:58 16:09 15:44 13:19 15:32 13:53 11:28 14:05 15:13 15:50 16:31 15:47 15:37 15:40 - pH Nitrate-N (mg/L) Collection method - 10.71 8.20 9.70 8.88 9.21 10.32 10.49 9.57 9.88 7.42 7.33 9.51 11.14 10.73 10.93 8.95 9.66 10.23 11.73 13.06 11.39 9.63 8.62 10.33 9.11 8.96 6.15 5.36 2.96 3.10 <0.09 <0.09 <0.09 <0.09 <0.09 0.27 0.26 0.38 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-274 Table E-7. Continued Date Time (CST) Water temp (F) 10/20/98 10/29/98 11/04/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 01/26/99 02/03/99 02/09/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/24/99 03/30/99 04/06/99 04/13/99 04/20/99 04/27/99 05/05/99 05/11/99 05/18/99 05/25/99 06/09/99 06/15/99 07/01/99 07/21/99 07/27/99 08/03/99 08/11/99 08/17/99 08/25/99 08/31/99 09/15/99 09/22/99 15:10 13:09 16:04 15:43 15:35 15:08 14:46 15:16 15:47 15:50 15:50 16:12 15:47 14:00 15:50 16:03 16:36 16:00 15:59 16:19 16:01 16:33 16:23 16:05 15:33 15:32 11:56 16:04 13:50 15:00 15:51 15:40 14:57 14:49 12:41 15:47 15:55 15:36 - pH Nitrate-N (mg/L) Collection method* - 0.32 <0.09 <0.09 0.19 <0.09 <0.09 <0.09 <0.09 9.97 11.09 10.26 11.67 10.88 10.71 12.07 10.65 10.70 9.63 8.57 11.60 14.54 13.37 12.63 12.05 13.03 12.40 14.50 13.08 11.94 4.54 1.32 <0.11 <0.11 1.10 0.35 <0.11 <0.11 0.18 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-275 Table E-7. Continued Date Time (CST) Water temp (F) 09/28/99 10/05/99 10/13/99 10/18/99 10/26/99 11/01/99 11/08/99 11/15/99 11/22/99 11/29/99 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 02/15/00 02/22/00 02/29/00 03/07/00 03/14/00 03/21/00 03/28/00 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/28/00 05/30/00 06/06/00 06/13/00 06/21/00 06/29/00 07/05/00 15:51 15:53 9:44 13:20 15:18 13:17 12:27 12:27 11:35 12:37 12:53 12:23 12:28 12:31 12:22 12:05 11:23 13:34 12:19 12:16 11:48 13:34 14:38 11:56 11:44 12:22 12:48 12:58 12:25 12:20 12:13 12:11 11:57 12:48 12:20 15:47 15:56 16:59 56 62 54 51 67 59 52 52 40 45 40 35 36 38 33 34 44 51 56 46 48 49 50 50 51 60 63 72 64 62 65 75 71 71 76 pH Nitrate-N (mg/L) Collection method* - 0.19 <0.11 <0.11 <0.11 <0.13 0.32 0.17 <0.13 <0.13 <0.13 <0.13 0.84 1.17 1.35 1.31 1.18 3.52 7.89 6.38 6.41 6.14 7.74 8.40 7.08 6.13 6.72 11.26 8.85 6.77 9.78 12.51 10.09 15.37 12.65 10.57 9.31 12.18 9.52 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-276 Table E-7. Continued Date Time (CST) Water temp (F) pH 07/12/00 07/20/00 07/26/00 08/02/00 08/08/00 08/15/00 08/22/00 08/30/00 09/05/00 09/12/00 09/19/00 09/26/00 10/03/00 10/10/00 10/17/00 10/24/00 10/30/00 11/08/00 11/14/00 11/20/00 11/28/00 12/05/00 12/14/00 01/16/01 01/31/01 02/06/01 02/14/01 02/20/01 02/24/01 02/27/01 03/06/01 03/15/01 03/21/01 03/27/01 03/27/01 04/03/01 04/10/01 04/17/01 8:56 8:40 8:25 15:18 13:40 15:24 11:18 8:32 15:48 12:24 14:12 15:25 13:43 15:20 16:20 14:54 13:54 13:28 14:20 12:52 13:09 13:30 12:15 14:15 14:20 13:45 14:52 13:44 13:01 15:43 13:27 11:09 14:46 14:17 16:50 12:54 12:48 12:48 75 71 71 81 75 83 73 77 73 76 70 61 69 50 60 64 58 51 43 35 38 33 32 33 34 37 40 39 40 40 39 48 42 42 54 67 53 7.96 7.85 8.02 7.87 8.05 8.05 7.93 A-277 Nitrate-N (mg/L) 8.09 5.08 2.55 0.69 0.78 <0.06 0.12 0.85 0.35 0.32 0.65 0.53 1.00 4.78 3.97 2.26 0.21 2.42 10.06 10.07 8.71 8.50 8.70 7.26 4.12 9.21 10.92 11.94 9.73 5.34 11.22 10.87 12.80 11.16 10.29 9.40 11.72 Collection method* Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-7. Continued Date Time (CST) Water temp (F) pH 04/25/01 05/01/01 05/09/01 05/16/01 05/21/01 05/22/01 05/30/01 06/05/01 06/14/01 06/19/01 06/27/01 07/03/01 07/10/01 07/18/01 07/24/01 08/01/01 08/08/01 08/16/01 08/22/01 08/29/01 09/06/01 09/12/01 09/19/01 09/26/01 10/04/01 10/11/01 10/17/01 10/24/01 11/01/01 11/07/01 11/07/01 11/13/01 11/19/01 11/27/01 12/04/01 12/11/01 12/19/01 12/26/01 9:19 12:39 13:02 12:37 14:40 12:58 15:23 12:25 10:27 13:19 14:55 8:44 13:14 8:18 8:47 11:14 14:42 10:42 13:57 12:58 11:40 10:59 10:35 11:48 11:03 13:19 13:02 15:03 13:49 12:20 12:42 14:02 14:32 13:21 13:29 12:53 10:29 13:22 57 70 70 76 67 64 62 61 78 79 70 82 77 82 85 80 71 80 77 76 70 66 62 64 60 51 58 54 55 55 49 53 47 52 41 45 33 7.92 7.59 8.06 8.28 8.12 8.27 8.33 8.25 8.16 7.92 8.53 8.22 8.61 7.76 8.24 8.24 8.00 8.07 8.51 A-278 Nitrate-N (mg/L) 9.44 8.95 7.85 7.34 10.45 12.31 16.00 13.10 14.03 11.66 9.73 7.02 5.08 1.57 <0.06 <0.06 <0.06 0.06 <0.06 0.08 0.22 0.52 0.29 0.24 <0.06 <0.06 3.23 5.17 7.58 6.01 5.67 4.49 3.89 9.62 7.49 11.34 10.47 Collection method* Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-7. Continued Date Time (CST) Water temp (F) 01/15/02 01/22/02 01/29/02 02/01/02 02/04/02 02/13/02 02/19/02 02/20/02 02/21/02 02/22/02 02/25/02 03/05/02 03/12/02 03/19/02 03/27/02 03/28/02 03/29/02 03/30/02 04/01/02 04/02/02 04/05/02 04/08/02 04/09/02 04/16/02 04/21/02 04/23/02 04/25/02 04/27/02 04/28/02 04/30/02 05/02/02 05/07/02 05/10/02 05/12/02 05/14/02 05/16/02 05/20/02 05/28/02 13:54 12:20 11:52 10:35 13:15 12:09 13:32 10:43 8:24 15:07 12:04 11:49 13:22 13:07 12:47 16:50 15:38 7:50 11:31 12:20 10:28 14:21 8:10 10:41 9:59 12:12 8:47 13:55 14:33 12:31 7:01 11:39 9:36 12:14 11:56 15:40 14:33 11:45 34 37 45 38 35 40 42 45 42 42 46 36 42 46 40 44 44 43 45 47 43 50 50 67 57 51 52 53 51 56 50 63 59 60 58 60 55 65 pH Nitrate-N (mg/L) Collection method* 8.16 8.05 8.14 7.77 7.75 7.95 8.05 7.69 7.51 8.02 7.55 7.69 6.75 10.54 13.45 11.54 10.17 10.02 10.16 11.90 12.84 13.43 12.30 11.98 10.86 10.75 11.53 11.99 12.84 12.66 12.09 11.44 11.62 11.62 10.41 12.48 12.80 12.08 12.37 14.09 14.88 12.25 13.23 11.64 11.36 11.91 14.76 13.63 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-279 Table E-7. Continued Date Time (CST) Water temp (F) 06/04/02 06/11/02 06/12/02 06/13/02 06/14/02 06/18/02 06/25/02 07/02/02 07/09/02 07/16/02 07/23/02 07/30/02 08/06/02 08/14/02 08/19/02 08/23/02 08/23/02 08/24/02 08/25/02 08/27/02 08/28/02 09/03/02 09/10/02 09/17/02 09/24/02 10/01/02 10/08/02 10/15/02 10/22/02 10/28/02 11/06/02 11/12/02 11/19/02 11/25/02 12/03/02 12/17/02 12/23/02 12/30/02 12:19 10:37 10:21 9:05 7:05 10:53 11:58 11:59 10:54 10:56 12:11 10:39 11:02 10:53 9:55 11:25 17:16 5:51 10:25 10:13 13:15 10:47 10:07 10:43 10:29 10:53 10:48 10:49 10:56 11:32 11:21 11:57 11:48 12:38 11:55 11:39 11:29 11:53 75 70 68 67 65 68 77 80 81 77 79 80 80 73 72 76 75 74 75 77 77 80 68 63 70 57 52 49 50 45 48 46 39 34 36 37 37 pH Nitrate-N (mg/L) Collection method* 8.13 8.18 8.21 8.08 8.04 7.91 8.24 8.32 8.15 7.98 7.67 7.47 7.80 - 13.08 13.86 10.89 12.64 10.85 13.68 12.93 11.20 8.02 4.98 2.44 1.41 0.95 0.71 0.77 3.02 3.06 2.63 3.04 4.27 4.77 3.76 1.87 0.96 0.98 0.53 0.44 0.43 0.42 0.31 0.12 <0.06 <0.06 <0.06 0.19 1.02 1.94 3.37 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-280 Table E-7. Continued Date Time (CST) Water temp (F) 01/07/03 02/04/03 03/04/03 03/11/03 03/18/03 03/20/03 03/25/03 03/31/03 04/07/03 04/15/03 04/22/03 04/29/03 05/05/03 05/06/03 05/09/03 05/13/03 05/14/03 05/20/03 05/27/03 06/03/03 06/10/03 06/11/03 06/12/03 06/13/03 06/17/03 06/24/03 07/01/03 07/08/03 07/09/03 07/10/03 07/10/03 07/11/03 07/15/03 07/22/03 07/29/03 08/05/03 08/12/03 08/19/03 12:59 12:07 12:03 11:29 11:59 8:16 12:08 12:11 12:20 11:12 9:47 11:19 12:13 10:17 6:34 14:40 9:37 9:59 12:06 11:42 10:15 23:58 10:50 7:47 12:35 11:11 11:45 11:19 20:23 8:02 14:27 6:56 9:10 8:58 14:03 8:37 13:15 9:11 35 33 37 38 55 58 48 47 63 55 61 59 63 64 61 62 63 65 59 69 68 77 78 81 77 73 73 73 73 74 76 73 75 75 pH Nitrate-N (mg/L) Collection method* 7.89 7.95 7.55 7.90 8.15 8.08 7.73 7.97 8.13 8.21 - 4.41 4.25 3.36 2.67 4.21 4.21 3.98 4.38 6.01 7.78 5.48 5.28 8.46 7.43 10.50 13.68 13.03 10.20 9.56 8.91 7.32 4.30 6.65 9.27 12.76 10.52 7.77 6.22 6.88 5.77 4.05 3.90 7.58 6.61 6.61 4.56 3.41 1.34 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-281 Table E-7. Continued Date Time (CST) Water temp (F) 08/26/03 08/31/03 09/01/03 09/01/03 09/02/03 09/03/03 09/04/03 09/05/03 09/10/03 09/16/03 09/23/03 09/30/03 10/07/03 10/14/03 10/21/03 10/28/03 11/05/03 11/10/03 11/18/03 11/21/03 12/02/03 12/09/03 12/17/03 12/22/03 12/30/03 01/06/04 01/13/04 01/21/04 02/24/04 03/03/04 03/09/04 03/16/04 03/23/04 03/29/04 04/07/04 04/15/04 04/19/04 04/27/04 9:07 13:19 5:15 14:45 10:57 6:40 6:41 6:42 12:55 10:00 13:23 10:17 8:28 8:51 13:15 9:25 10:07 9:30 9:53 9:10 10:16 12:16 9:36 11:50 8:50 15:10 8:50 9:30 10:10 14:50 13:30 11:05 10:15 10:45 10:19 11:20 13:35 10:08 77 68 66 66 71 68 69 55 57 57 59 50 56 43 55 42 39 45 48 - pH Nitrate-N (mg/L) Collection method* 8.23 8.25 7.92 8.14 7.70 7.57 7.76 7.87 7.87 8.20 7.98 8.07 7.11 7.47 8.05 - 0.66 1.14 0.96 1.47 2.96 3.62 4.82 5.43 4.96 3.52 2.53 6.51 5.75 3.97 3.69 2.77 2.12 2.34 3.79 7.59 9.26 8.46 9.24 8.24 9.23 9.01 9.72 8.77 6.86 6.48 11.02 9.12 8.10 8.43 10.54 9.83 9.02 9.42 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-282 Table E-7. Continued Date Time (CST) Water temp (F) 05/04/04 05/11/04 05/18/04 05/25/04 06/02/04 06/03/04 06/07/04 06/09/04 06/14/04 06/15/04 06/16/04 06/18/04 06/21/04 06/28/04 07/13/04 07/20/04 07/27/04 08/04/04 08/11/04 08/17/04 08/24/04 08/26/04 08/31/04 09/07/04 09/14/04 09/22/04 09/28/04 10/05/04 10/12/04 10/20/04 10/27/04 11/03/04 11/09/04 11/16/04 11/23/04 12/01/04 12/07/04 12/15/04 11:50 10:30 10:55 10:12 8:45 9:35 9:45 9:45 9:30 8:52 13:50 13:30 8:45 10:25 9:09 8:48 9:25 8:38 9:32 10:32 11:40 8:30 9:55 9:26 9:11 8:58 9:15 9:28 8:42 9:38 11:55 12:10 10:03 10:30 10:22 10:23 11:30 10:12 70 67 76 75 73 62 68 78 74 69 77 69 74 71 71 71 73 68 63 56 56 55 60 57 52 48 51 42 49 36 pH Nitrate-N (mg/L) Collection method* 7.90 7.89 8.06 8.45 8.19 7.91 7.99 8.16 8.00 8.12 8.47 8.39 8.23 8.14 8.31 7.98 7.97 7.72 7.41 8.16 7.38 7.91 8.15 7.49 7.66 8.23 7.43 15.22 10.13 6.99 6.90 11.89 12.82 7.04 8.63 9.36 8.31 10.43 10.43 7.45 7.38 4.95 2.58 1.18 0.70 0.46 0.56 3.91 3.42 2.19 1.48 1.38 1.15 1.34 6.22 5.85 6.88 8.39 7.91 7.35 7.10 6.42 8.26 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-283 Table E-7. Continued Date Time (CST) Water temp (F) 12/21/04 12/28/04 01/04/05 01/11/05 01/12/05 01/12/05 01/19/05 01/25/05 02/02/05 02/08/05 02/16/05 02/22/05 03/02/05 03/08/05 03/15/05 03/22/05 03/29/05 04/05/05 04/12/05 04/20/05 04/26/05 05/03/05 05/11/05 05/18/05 05/25/05 06/01/05 06/08/05 06/15/05 06/22/05 06/29/05 07/05/05 07/12/05 07/19/05 07/27/05 08/02/05 08/09/05 08/23/05 08/30/05 9:47 9:55 10:12 10:41 9:37 16:10 10:26 11:06 10:16 9:37 11:17 9:59 9:18 9:58 9:40 10:03 9:49 8:55 9:07 8:56 8:51 8:50 9:21 9:20 9:03 8:30 9:08 12:05 13:05 8:15 9:29 8:37 9:26 8:52 9:15 9:23 9:28 13:41 33 32 42 40 45 45 33 35 33 40 41 40 35 41 38 44 48 56 61 66 55 49 70 65 64 69 76 74 77 81 77 74 80 78 80 79 79 74 pH Nitrate-N (mg/L) Collection method* 8.49 8.69 8.32 7.80 7.66 7.62 6.97 7.28 7.78 7.96 7.77 7.83 7.75 8.08 8.12 8.42 8.21 7.99 8.03 8.06 8.03 8.05 8.03 7.97 8.03 8.07 8.12 8.08 8.21 8.24 8.12 8.46 8.13 7.80 7.83 8.57 7.74 7.65 8.40 8.76 8.83 9.12 7.15 6.85 7.54 8.20 8.14 9.89 8.46 9.27 9.03 8.54 8.28 7.45 9.31 8.58 7.76 7.36 11.78 8.97 7.35 6.89 8.24 6.62 5.19 7.65 5.38 1.99 2.43 <0.07 <0.07 2.38 2.44 <0.07 0.28 0.36 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-284 Table E-7. Continued Date Time (CST) Water temp (F) pH 09/06/05 09/12/05 09/20/05 09/26/05 10/03/05 10/11/05 10/17/05 10/24/05 10/31/05 11/07/05 11/14/05 11/21/05 11/28/05 01/04/06 01/09/06 01/17/06 01/23/06 01/31/06 02/06/06 02/14/06 02/22/06 02/27/06 03/06/06 03/14/06 03/20/06 03/27/06 04/03/06 04/05/06 04/06/06 04/07/06 04/10/06 04/19/06 04/20/06 04/24/06 05/01/06 05/08/06 05/15/06 05/22/06 13:55 12:00 9:00 11:56 13:20 12:18 11:40 8:39 9:51 10:08 10:05 13:45 10:16 10:52 10:18 10:05 9:40 9:27 9:31 11:07 9:36 9:17 9:36 13:03 9:26 9:48 9:13 9:21 18:00 12:52 9:40 9:15 14:15 9:05 9:10 8:26 12:46 8:55 78 78 71 71 70 59 61 49 55 53 46 42 47 42 39 36 37 41 35 35 34 38 38 47 43 43 50 50 55 51 60 60 60 56 60 53 61 8.06 7.89 7.88 7.88 7.71 7.76 7.95 7.74 8.07 7.53 7.74 7.95 7.94 8.06 8.05 8.13 8.07 7.95 8.04 8.26 7.99 7.96 8.11 8.06 8.12 7.95 8.02 7.90 7.61 7.77 7.80 7.64 8.08 8.10 8.05 8.20 8.26 A-285 Nitrate-N (mg/L) 0.27 0.09 0.22 1.09 1.12 0.58 0.42 0.36 0.88 1.63 0.41 3.10 2.57 8.38 7.18 6.49 8.83 8.40 8.91 7.71 9.07 7.43 6.91 11.80 11.51 10.15 9.57 11.40 11.85 13.72 8.14 12.18 11.96 10.82 12.12 11.49 11.29 Collection method* Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Table E-7. Continued Date Time (CST) Water temp (F) 06/01/06 06/05/06 06/12/06 06/19/06 06/27/06 07/05/06 07/10/06 07/18/06 07/25/06 08/01/06 08/07/06 08/14/06 08/22/06 08/30/06 09/05/06 09/12/06 09/18/06 09/25/06 10/03/06 10/10/06 10/16/06 10/23/06 10/31/06 11/08/06 11/14/06 11/20/06 11/27/06 12/05/06 12/12/06 12/19/06 12/27/06 01/02/07 01/08/07 01/16/07 01/22/07 01/29/07 03/06/07 03/13/07 8:14 9:09 8:55 9:13 8:42 8:58 8:53 9:09 8:51 8:30 9:12 10:00 10:15 9:02 9:15 9:03 10:05 8:43 8:52 15:28 10:25 9:15 9:14 9:38 11:15 10:52 10:22 10:13 10:12 9:46 9:30 10:05 10:19 10:05 13:30 10:55 10:58 10:15 72 70 64 79 71 75 76 81 77 80 78 75 75 68 67 70 68 69 67 62 48 45 48 48 45 42 47 33 43 43 38 42 41 36 35 33 33 49 pH Nitrate-N (mg/L) Collection method* 8.22 8.10 8.18 8.23 8.18 8.07 8.16 8.12 8.12 8.19 8.04 8.24 8.06 8.03 8.18 8.08 8.18 7.94 8.11 8.31 8.27 8.26 8.20 7.98 8.08 8.20 8.19 7.88 8.01 8.09 7.98 8.12 7.93 7.50 8.00 8.27 7.86 7.98 9.15 9.02 8.39 6.59 4.10 4.09 2.71 6.00 2.46 4.60 3.09 1.66 2.41 4.40 2.74 1.34 1.37 1.45 2.79 1.87 2.81 8.26 6.79 5.66 5.54 8.69 7.40 10.17 9.21 9.97 9.81 9.70 10.42 8.14 10.14 9.96 5.46 7.89 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-286 Table E-7. Continued Date Time (CST) Water temp (F) 03/20/07 03/27/07 04/02/07 04/10/07 04/16/07 04/24/07 04/26/07 05/01/07 05/09/07 05/15/07 05/21/07 05/29/07 06/12/07 06/19/07 06/26/07 07/03/07 07/26/07 08/01/07 08/09/07 08/15/07 08/21/07 08/29/07 09/04/07 09/11/07 09/18/07 09/25/07 10/09/07 10/17/07 10/24/07 10/31/07 11/06/07 11/14/07 11/27/07 12/03/07 12/19/07 12/26/07 01/10/08 01/16/08 8:18 13:58 2:18 8:58 13:51 9:47 8:30 8:25 9:58 11:48 10:58 10:25 8:44 8:20 10:15 9:19 7:50 9:37 7:49 8:51 8:40 7:55 8:40 9:40 9:10 10:20 9:35 8:35 9:45 11:50 11:35 10:38 15:30 15:30 11:00 11:20 9:45 12:45 44 64 57 43 50 63 67 68 72 68 70 72 75 72 75 73 78 80 76 76 75 74 68 68 74 70 63 54 52 44 53 39 35 34 35 - pH Nitrate-N (mg/L) Collection method* 8.10 7.93 7.97 8.25 8.25 8.28 8.26 8.05 8.26 8.25 8.39 8.23 8.22 8.13 8.23 8.06 7.99 7.68 7.87 7.91 8.06 8.03 8.08 7.83 7.86 7.99 7.75 8.11 7.85 8.11 7.80 7.45 7.98 8.05 8.29 8.71 - 8.38 10.22 10.98 10.60 10.77 9.37 8.97 11.83 10.22 9.43 8.92 10.86 7.26 4.66 6.60 8.60 4.54 2.34 0.79 0.38 0.53 0.44 0.51 0.47 0.39 0.09 0.13 <0.07 0.81 0.35 0.55 <0.07 9.39 7.22 9.90 10.57 3.12 9.60 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-287 Table E-7. Concluded Date Time (CST) Water temp (F) 02/06/08 02/13/08 02/19/08 03/13/08 03/26/08 04/09/08 04/23/08 04/30/08 05/20/08 05/27/08 06/04/08 06/10/08 06/17/08 06/25/08 07/01/08 07/09/08 07/17/08 07/28/08 08/06/08 08/12/08 08/19/08 08/26/08 09/02/08 09/22/08 16:12 14:55 15:00 17:20 14:45 9:15 8:43 10:45 8:55 8:13 9:04 11:58 9:45 10:08 9:20 9:15 10:45 10:12 8:55 9:58 8:30 9:20 10:28 10:25 33 45 45 49 62 52 56 58 73 72 71 76 78 71 70 70 78 67 pH Nitrate-N (mg/L) Collection method* 8.80 8.16 8.31 8.70 7.75 8.04 7.91 8.36 7.66 7.91 7.65 7.56 7.81 7.68 7.73 7.69 7.68 8.00 7.59 2.10 7.99 4.72 9.94 10.88 10.05 9.40 9.34 12.24 11.25 2.90 7.03 11.59 10.97 10.02 4.53 8.93 7.82 5.57 4.10 2.28 0.98 0.61 4.35 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) A-288 Table E-8. Nitrate-N Concentrations for the Monitored Stations and Daily Values from Lake Decatur for Sangamon River USGS Station #00570910 near Fisher (Station 112), May 1993 – September 2008 Date Time (CST) Water temp (F) 04/19/93 05/07/93 05/14/93 06/03/93 06/04/93 06/14/93 06/22/93 06/29/93 07/06/93 07/22/93 07/29/93 08/09/93 08/12/93 08/13/93 08/16/93 08/24/93 08/31/93 09/08/93 09/14/93 09/30/93 10/07/93 10/12/93 10/18/93 10/28/93 11/02/93 11/09/93 11/15/93 11/23/93 12/01/93 12/09/93 12/15/93 12/28/93 01/12/94 02/15/94 02/22/94 02/28/94 03/07/94 13:53 16:13 16:55 15:01 15:32 14:18 12:03 9:44 11:29 18:00 9:56 12:11 16:22 13:44 14:46 14:15 10:12 12:04 11:35 9:43 10:12 10:52 10:21 13:53 12:00 10:36 11:38 10:05 10:04 9:30 13:14 11:20 9:35 10:15 9:44 10:17 10:02 - pH Nitrate-N (mg/L) Collection method* - 10.55 11.33 10.23 13.90 11.10 12.00 12.02 5.38 9.35 9.19 7.70 6.18 5.40 7.33 6.93 6.45 5.42 5.01 6.24 7.05 6.48 6.53 2.67 6.55 6.18 5.94 5.98 7.79 7.47 8.16 7.12 6.05 5.79 3.12 6.29 5.61 7.17 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-289 Table E-8. Continued Date Time (CST) Water temp (F) 03/17/94 03/23/94 03/28/94 04/04/94 04/11/94 04/12/94 04/14/94 04/18/94 04/25/94 04/29/94 05/03/94 05/09/94 05/16/94 05/24/94 06/01/94 06/06/94 06/14/94 06/20/94 06/28/94 07/05/94 07/12/94 07/27/94 08/01/94 08/22/94 08/29/94 09/07/94 09/23/94 10/12/94 10/18/94 10/25/94 11/07/94 11/14/94 11/21/94 11/28/94 12/05/94 12/13/94 12/21/94 01/03/95 15:06 10:29 14:52 10:07 10:32 9:59 11:30 15:45 15:46 10:56 10:41 14:42 14:57 10:10 9:50 10:02 9:24 9:49 12:10 10:05 9:44 12:03 7:51 8:00 6:53 7:04 6:57 9:31 10:00 10:09 10:15 15:40 9:35 16:03 15:28 14:52 9:59 15:41 - pH Nitrate-N (mg/L) Collection method* - 7.14 6.49 6.14 5.62 6.99 1.33 6.87 7.81 7.46 7.09 9.08 9.82 8.26 7.79 6.83 6.36 5.91 4.28 3.42 1.45 1.74 <0.02 <0.02 <0.02 <0.02 <0.02 0.03 0.68 0.20 <0.02 4.97 4.03 3.83 5.53 5.44 8.09 7.58 6.81 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-290 Table E-8. Continued Date Time (CST) Water temp (F) 01/11/95 01/18/95 01/23/95 02/01/95 02/08/95 02/16/95 02/24/95 02/27/95 03/07/95 03/08/95 03/14/95 03/22/95 03/29/95 04/04/95 04/10/95 04/10/95 04/11/95 04/11/95 04/12/95 04/25/95 05/02/95 05/10/95 05/23/95 05/30/95 06/05/95 06/12/95 06/21/95 06/27/95 07/10/95 07/18/95 07/25/95 08/02/95 08/04/95 08/07/95 08/08/95 08/16/95 08/22/95 08/31/95 10:02 13:04 10:17 15:17 9:21 14:58 9:36 14:35 15:12 13:49 9:58 9:12 11:32 9:45 11:25 14:55 9:40 15:44 10:42 10:02 15:08 12:26 11:31 14:36 11:30 15:06 10:04 10:34 9:44 14:49 9:11 14:34 9:05 15:08 12:43 9:49 14:52 11:36 - pH Nitrate-N (mg/L) Collection method* - 5.92 9.16 8.84 8.42 8.14 7.02 5.61 5.89 6.78 9.78 9.84 8.61 9.27 8.35 8.72 9.31 11.02 11.19 10.23 10.81 10.11 9.28 11.46 11.70 11.41 12.22 10.90 10.67 8.29 4.97 2.84 1.08 1.55 4.89 3.81 3.91 4.26 0.58 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-291 Table E-8. Continued Date Time (CST) Water temp (F) 09/06/95 09/12/95 09/19/95 10/06/95 10/11/95 10/17/95 10/24/95 11/01/95 11/07/95 11/14/95 11/20/95 11/28/95 12/05/95 12/12/95 12/18/95 12/28/95 01/18/96 01/23/96 01/29/96 02/14/96 02/20/96 02/27/96 03/05/96 03/11/96 03/18/96 03/28/96 04/02/96 04/09/96 04/16/96 04/23/96 04/30/96 05/01/96 05/07/96 05/08/96 05/08/96 05/13/96 05/21/96 05/28/96 10:19 9:30 9:30 11:11 9:55 9:20 9:14 10:22 9:50 12:03 10:24 9:43 9:18 11:00 10:56 9:20 13:06 15:18 13:00 9:05 10:48 9:20 9:09 11:36 9:24 9:25 9:27 9:13 9:35 9:25 10:47 9:56 10:20 10:22 15:03 12:53 10:02 12:11 - pH Nitrate-N (mg/L) Collection method* - <0.02 0.36 0.27 0.39 0.14 <0.02 0.15 3.46 7.25 8.22 7.50 6.65 5.25 6.97 4.54 6.09 6.06 8.94 8.53 5.63 5.70 4.83 6.99 6.83 5.71 6.64 9.13 7.77 6.62 10.84 10.02 10.16 10.82 10.22 9.99 12.80 12.66 8.94 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-292 Table E-8. Continued Date Time (CST) Water temp (F) 06/04/96 06/11/96 06/18/96 06/25/96 07/01/96 07/08/96 07/15/96 07/22/96 07/29/96 08/05/96 08/12/96 08/20/96 08/26/96 09/03/96 09/09/96 09/17/96 09/24/96 10/01/96 10/09/96 10/16/96 10/21/96 10/30/96 11/06/96 11/12/96 11/18/96 12/02/96 12/10/96 12/30/96 01/07/97 01/22/97 02/04/97 02/13/97 02/18/97 02/21/97 02/27/97 03/04/97 03/11/97 03/14/97 10:53 10:00 9:52 9:30 11:40 14:40 11:21 10:44 11:40 9:58 10:30 10:02 11:50 10:13 15:48 14:53 10:37 9:08 13:30 10:17 13:36 14:40 10:35 12:28 15:54 10:53 15:37 13:20 11:33 10:39 10:47 11:42 10:28 12:15 15:10 11:27 11:14 9:22 - pH Nitrate-N (mg/L) Collection method* - 13.94 11.32 5.06 12.49 11.58 9.17 6.53 10.56 7.56 7.02 1.91 1.45 0.30 <0.02 <0.02 0.03 0.03 1.05 0.11 <0.02 <0.02 <0.02 <0.02 0.81 1.93 3.72 6.34 7.97 9.81 5.86 5.45 8.32 7.87 6.21 4.94 11.30 12.47 10.50 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-293 Table E-8. Continued Date Time (CST) Water temp (F) 03/20/97 03/25/97 04/01/97 04/08/97 04/15/97 04/23/97 05/01/97 05/06/97 05/12/97 05/19/97 05/27/97 06/02/97 06/09/97 06/17/97 06/24/97 07/01/97 07/08/97 07/15/97 07/22/97 07/28/97 08/05/97 08/12/97 08/19/97 08/26/97 09/03/97 09/10/97 09/19/97 09/24/97 10/01/97 10/07/97 10/16/97 10/21/97 10/27/97 11/04/97 11/12/97 11/18/97 11/25/97 12/04/97 11:02 14:27 9:36 10:15 14:10 10:41 17:59 9:49 14:04 13:30 14:19 14:48 9:56 9:50 9:38 14:59 10:08 9:50 10:46 10:49 10:23 10:00 10:20 10:56 10:25 10:08 10:06 10:38 10:09 10:15 10:10 9:53 11:59 9:39 10:58 10:33 11:37 10:53 - pH Nitrate-N (mg/L) Collection method* - 11.89 10.94 10.32 10.12 10.24 9.70 8.47 11.73 9.61 8.02 12.87 14.19 14.39 15.21 13.28 10.27 10.06 7.16 3.15 2.39 <0.08 0.18 5.70 3.60 0.50 2.13 1.29 0.75 0.50 0.12 <0.04 0.31 0.28 0.24 0.43 0.35 0.47 5.34 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-294 Table E-8. Continued Date Time (CST) Water temp (F) 12/09/97 12/16/97 12/22/97 12/29/97 01/06/98 01/14/98 01/27/98 02/03/98 02/10/98 02/17/98 02/19/98 02/25/98 03/03/98 03/17/98 03/19/98 03/24/98 04/02/98 04/08/98 04/14/98 04/21/98 04/29/98 05/06/98 05/12/98 05/19/98 05/27/98 06/03/98 06/09/98 06/16/98 06/22/98 07/08/98 07/15/98 07/22/98 07/28/98 08/04/98 08/12/98 08/25/98 09/02/98 09/09/98 14:36 10:30 10:22 10:11 10:09 10:25 11:18 10:59 10:26 10:26 10:13 15:32 10:29 10:38 10:36 16:24 11:00 10:43 10:25 10:03 11:32 10:52 10:33 10:20 10:00 10:25 10:49 11:15 12:29 13:00 10:43 10:06 15:31 10:38 16:14 14:33 15:51 10:35 - pH Nitrate-N (mg/L) Collection method* - 4.94 4.22 3.90 9.17 9.16 11.36 9.12 10.18 9.40 10.19 12.39 10.82 10.73 11.45 8.21 9.40 11.13 10.77 10.04 11.85 10.03 12.63 11.61 11.51 13.69 12.19 9.50 8.00 12.49 10.92 10.12 6.55 5.05 2.42 2.18 0.39 0.29 0.20 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-295 Table E-8. Continued Date Time (CST) Water temp (F) 09/16/98 09/22/98 09/30/98 10/06/98 10/14/98 10/20/98 10/29/98 11/04/98 11/12/98 11/18/98 11/23/98 12/01/98 12/09/98 12/15/98 12/21/98 01/25/99 02/02/99 02/09/99 02/17/99 02/24/99 03/03/99 03/10/99 03/16/99 03/25/99 03/30/99 04/06/99 04/08/99 04/13/99 04/14/99 04/15/99 04/15/99 04/16/99 04/17/99 04/18/99 04/19/99 04/20/99 04/27/99 05/05/99 9:45 11:34 10:14 10:56 10:15 9:36 14:56 11:07 9:45 10:25 10:41 10:09 10:01 10:33 10:00 10:40 10:16 10:30 10:46 10:10 15:39 9:49 10:20 9:44 10:30 10:53 10:06 11:29 14:33 1:12 11:57 11:18 12:05 12:19 11:35 10:17 10:07 10:44 - pH Nitrate-N (mg/L) Collection method* - 0.18 0.20 0.25 0.25 0.56 0.13 0.25 0.28 1.08 0.43 0.65 0.74 0.43 0.45 0.81 11.22 11.95 12.56 12.39 11.74 12.08 12.68 12.19 11.65 10.96 9.47 9.73 12.62 12.16 11.54 11.77 15.53 14.58 15.94 16.32 15.91 14.70 13.69 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-296 Table E-8. Continued Date Time (CST) Water temp (F) 05/11/99 05/17/99 05/18/99 05/21/99 05/22/99 05/25/99 06/01/99 06/02/99 06/05/99 06/09/99 06/10/99 06/12/99 06/13/99 06/14/99 06/15/99 06/16/99 06/18/99 06/21/99 07/01/99 07/08/99 07/13/99 07/20/99 07/21/99 07/27/99 07/28/99 07/29/99 08/11/99 08/24/99 08/31/99 09/07/99 09/15/99 09/22/99 09/28/99 10/05/99 10/13/99 10/18/99 10/26/99 11/01/99 9:55 10:53 10:00 13:09 7:32 10:25 15:49 10:40 7:47 15:30 10:39 20:38 19:41 10:28 10:44 14:31 13:34 11:11 9:36 9:00 10:51 15:27 9:30 10:26 11:28 10:33 9:43 10:27 10:32 10:24 9:57 10:36 10:50 10:27 14:11 10:11 10:30 10:18 48 59 pH Nitrate-N (mg/L) Collection method* - 12.87 14.67 14.06 13.98 13.83 13.42 11.83 11.37 15.47 15.12 15.12 13.79 13.41 11.91 11.59 14.56 15.27 14.73 13.13 12.67 10.18 5.08 4.44 0.82 0.81 0.74 0.29 0.16 1.71 0.21 <0.11 <0.11 <0.11 0.22 0.24 <0.11 <0.13 <0.13 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab A-297 Table E-8. Concluded Date Time (CST) Water temp (F) 11/08/99 11/15/99 11/22/99 11/29/99 12/06/99 12/13/99 12/20/99 01/03/00 01/10/00 01/18/00 02/15/00 02/22/00 02/29/00 03/07/00 03/14/00 03/21/00 03/28/00 04/04/00 04/11/00 04/18/00 04/25/00 05/02/00 05/09/00 05/16/00 05/23/00 05/28/00 05/30/00 06/06/00 06/13/00 06/20/00 06/26/00 07/03/00 07/10/00 07/17/00 07/24/00 9:36 10:21 9:12 10:22 9:54 9:56 10:08 10:07 9:52 9:20 9:33 10:59 9:59 15:55 9:36 9:59 10:18 9:08 8:55 9:31 8:57 8:37 8:25 8:32 14:46 9:45 8:20 8:56 8:10 8:38 10:15 8:18 10:06 11:44 12:46 51 48 47 40 43 39 34 34 36 33 33 36 49 58 43 48 50 48 48 50 54 59 71 63 70 60 65 61 74 73 73 76 77 78 71 pH Nitrate-N (mg/L) Collection method* - <0.13 <0.13 <0.13 0.14 0.16 0.19 0.85 2.05 1.08 0.95 3.23 8.53 7.05 7.16 6.74 9.51 8.68 7.48 6.49 4.94 11.61 9.35 7.85 8.52 11.89 15.25 16.86 12.97 9.77 8.68 13.74 10.65 8.51 5.51 2.18 Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Notes: *Grab: Weighted Bottle (dip sample in extreme low flow conditions) A-298 Appendix F. Annual Mean, Minimum, and Maximum Nitrate Concentrations (mg/L) by Station, WY 1993-2008 A-299 Table F-1. Annual Mean, Minimum, and Maximum Nitrate Concentrations (mg/L), WY 1993 – 2008, Tributary Stations Station no. Nitrate (mg/L) Mean Min Max Nitrate (mg/L) Mean Min Max Nitrate (mg/L) Mean Min Max 101 102 103 104 106 Water Year 1993 7.58 0.74 7.83 0.22 9.31 6.79 9.63 3.84 10.30 4.88 13.50 11.40 14.10 13.69 15.28 Water Year 1994 7.37 0.10 7.44 0.22 7.56 0.02 8.02 0.02 6.19 0.02 11.57 12.54 10.97 11.59 11.02 Water Year 1995 5.44 0.02 6.46 0.02 7.53 0.02 7.89 0.02 7.66 0.02 12.12 13.37 16.06 14.21 15.13 101 102 103 104 106 Water Year 1996 5.91 0.02 7.23 0.15 8.72 0.02 9.94 0.30 7.56 0.02 13.89 14.58 20.38 16.69 12.46 Water Year 1997 5.34 0.02 7.11 0.11 7.62 0.02 8.34 0.02 11.46 0.02 14.41 14.78 14.66 16.36 17.39 Water Year 1998 7.09 0.04 7.51 0.04 7.84 0.09 7.86 0.09 9.49 0.04 14.53 14.73 14.10 12.82 15.54 101 102 103 104 106 Water Year 1999 7.04 0.09 7.96 0.09 8.21 0.09 7.53 0.09 9.91 0.09 13.60 16.82 17.97 18.30 25.20 Water Year 2000 2.55 0.06 6.03 0.20 7.96 0.11 6.30 0.06 4.98 0.06 11.17 13.85 15.54 15.30 19.54 Water Year 2001 7.40 0.08 7.80 0.21 8.14 0.06 8.68 0.06 13.06 12.68 12.65 19.53 101 102 103 104 106 Water Year 2002 7.45 0.06 9.81 0.72 11.32 0.56 12.40 0.06 13.17 15.84 16.17 17.34 Water Year 2003 2.06 0.06 5.49 0.06 10.35 0.06 12.64 13.74 17.22 Water Year 2004 6.65 0.07 7.40 0.07 - 16.07 13.84 - 101 102 Water Year 2005 6.50 0.30 9.18 6.70 0.19 9.20 Water Year 2006 6.05 0.13 7.45 0.65 14.64 14.67 Water Year 2007 5.92 0.07 6.54 0.23 11.94 10.36 101 102 Water Year 2008 8.63 0.07 14.72 7.21 0.07 13.95 Table F-2. Annual Mean, Minimum, and Maximum Nitrate Concentrations (mg/L), Water Years 1993 – 2008, River Stations Station no. Mean 112 105 111 SWTP Water Year 1993 8.44 5.01 13.90 7.43 3.38 11.90 7.18 3.40 11.27 5.16 2.40 8.4 Water Year 1994 5.29 0.02 5.42 0.02 5.55 0.02 4.41 0.60 9.82 10.17 9.54 8.10 Water Year 1995 6.66 0.02 12.22 7.11 0.39 10.33 3.41 0.02 8.64 4.05 0.50 8.30 112 105 111 SWTP Water Year 1996 6.35 0.02 7.46 0.22 5.91 0.02 4.28 0.50 13.94 13.92 13.21 11.80 Water Year 1997 6.59 0.02 9.45 0.08 6.16 0.02 4.12 0.40 15.21 15.79 14.01 10.60 Water Year 1998 6.61 0.04 5.52 0.09 6.19 0.04 5.23 0.60 112 105 111 SWTP Water Year 1999 8.20 0.11 4.32 0.29 6.22 0.09 5.19 0.80 16.32 12.82 14.54 12.70 Water Year 2000 5.74 0.11 4.77 0.13 4.29 0.06 2.29 0.20 16.86 16.91 15.37 8.00 Water Year 2001 7.42 0.06 16.81 6.79 0.06 16.00 5.08 0.90 10.80 112 105 111 SWTP Water Year 2002 9.06 0.77 15.87 8.78 0.06 14.88 6.58 1.00 13.00 Water Year 2003 5.05 0.16 4.78 0.06 2.46 1.00 14.04 13.68 8.60 Water Year 2004 6.81 0.08 15.22 5.30 1.30 11.20 111 SWTP Water Year 2005 6.96 0.07 11.78 5.05 1.10 9.50 Water Year 2006 6.71 0.36 4.26 0.50 13.72 9.10 Water Year 2007 6.71 0.09 11.83 5.16 1.20 10.50 111 SWTP Water Year 2008 5.81 0.07 10.88 5.12 0.80 10.50 Min Max Mean Min A-301 Max Mean Min Max 13.69 12.31 13.06 11.10 A-302 Appendix G. Monthly Nitrate-N Yields (WY 1993-2008) A-303 Table G. Monthly Nitrate-N Yields (WY 1993-2008) Water year Month 101 102 103 Station number (lbs/acre) 104 106 105 111 112 May-93 Jun-93 Jul-93 Aug-93 Sep-93 1.53 1.02 0.55 0.01 2.60 3.34 1.89 5.06 0.99 2.03 2.57 4.38 5.91 0.55 2.83 2.53 2.25 5.08 4.85 3.66 4.22 5.83 11.31 0.77 4.32 2.79 5.21 6.96 0.77 3.37 2.81 3.80 5.47 1.06 2.62 2.93 6.07 7.15 1.00 2.20 WY 94 Oct-93 Nov-93 Dec-93 Jan-94 Feb-94 Mar-94 Apr-94 May-94 Jun-94 Jul-94 Aug-94 3.88 3.84 3.05 1.49 0.58 1.46 7.81 3.77 1.37 0.08 0.00 3.78 3.19 2.83 0.79 0.53 2.02 8.41 4.57 1.24 0.12 0.00 3.25 3.45 2.40 2.12 0.87 1.60 6.49 4.97 1.00 0.25 0.00 3.71 2.74 3.12 1.95 0.57 1.64 6.90 4.30 0.57 0.02 0.00 2.59 2.31 2.61 1.21 0.53 1.12 12.01 2.75 0.12 0.09 0.00 3.26 2.54 2.96 1.14 0.78 1.78 5.12 2.33 0.33 0.07 0.00 3.58 2.83 3.00 1.32 0.80 1.86 5.80 3.28 0.51 0.11 0.00 3.82 2.93 2.98 1.08 0.75 1.99 5.80 2.31 0.33 0.03 0.00 WY 95 Sep-94 Oct-94 Nov-94 Dec-94 Jan-95 Feb-95 Mar-95 Apr-95 May-95 Jun-95 Jul-95 Aug-95 0.00 0.00 0.03 0.16 1.88 0.31 1.13 0.74 8.23 1.02 0.01 0.00 0.00 0.00 0.04 0.34 1.77 0.32 2.61 1.45 14.36 3.01 0.23 0.03 0.00 0.00 0.32 0.97 0.83 0.77 2.52 3.91 12.15 3.37 0.31 0.07 0.00 0.00 0.05 0.41 2.44 0.30 1.46 1.08 14.51 1.58 0.10 0.00 0.00 0.00 0.22 0.92 3.85 0.42 2.43 4.30 10.74 5.17 0.42 0.19 0.00 0.00 0.19 1.43 3.73 0.42 2.32 3.50 10.22 3.31 0.25 0.21 0.00 0.00 0.15 1.10 3.65 0.49 2.16 9.55 8.05 4.96 0.54 0.12 0.00 0.00 0.38 1.50 3.10 0.57 2.63 3.70 12.11 3.61 0.40 0.34 WY 96 Sep-95 Oct-95 Nov-95 Dec-95 Jan-96 Feb-96 Mar-96 Apr-96 May-96 Jun-96 Jul-96 Aug-96 Sep-96 0.00 0.00 0.01 0.00 0.34 0.14 0.38 2.47 14.15 5.54 0.16 0.00 0.00 0.00 0.00 0.01 0.01 0.23 0.08 0.25 1.67 11.87 5.84 0.31 0.00 0.00 0.00 0.00 0.07 0.06 0.82 0.29 0.38 0.98 6.49 3.20 0.51 0.01 0.00 0.00 0.00 0.00 0.00 0.45 0.17 0.24 1.22 11.35 4.66 0.07 0.00 0.00 0.00 0.01 1.55 0.80 3.74 1.22 1.03 1.84 10.86 6.10 1.47 0.18 0.00 0.01 0.00 0.64 0.15 1.01 0.29 0.29 0.73 8.47 5.05 0.33 0.06 0.00 0.00 0.00 0.01 0.36 0.81 2.83 5.35 0.98 8.05 4.96 0.54 0.12 0.00 0.00 0.00 1.06 0.28 1.26 0.34 0.51 1.13 8.90 4.82 0.75 0.07 0.00 A-304 Table G. Continued Water year Month 101 102 103 Station number (lbs/acre) 104 106 105 111 112 WY 97 Oct-96 Nov-96 Dec-96 Jan-97 Feb-97 Mar-97 Apr-97 May-97 Jun-97 Jul-97 Aug-97 Sep-97 0.00 0.00 0.00 0.02 1.37 3.42 0.35 0.96 1.28 0.01 0.00 0.00 0.00 0.01 0.09 0.41 3.17 5.02 0.86 2.82 4.31 0.55 0.00 0.09 0.00 0.05 0.49 1.24 3.13 3.72 0.78 1.79 3.51 0.21 0.01 0.22 0.00 0.02 0.20 0.71 3.55 2.83 0.40 1.01 3.62 0.20 0.15 0.67 0.00 0.01 1.19 2.87 5.92 5.56 1.71 3.22 9.14 1.26 0.03 0.01 0.00 0.01 0.33 1.05 3.01 5.40 0.88 2.45 4.44 0.34 0.09 0.01 0.00 0.01 0.36 0.81 2.83 5.35 0.98 2.51 5.31 0.49 0.09 0.06 0.00 0.01 0.38 1.20 3.52 5.09 1.27 3.50 5.50 0.52 0.18 0.03 WY 98 Oct-97 Nov-97 Dec-97 Jan-98 Feb-98 Mar-98 Apr-98 May-98 Jun-98 Jul-98 Aug-98 Sep-98 0.00 0.00 0.01 1.32 1.57 8.03 4.98 8.72 12.30 1.87 0.28 0.00 0.01 0.19 1.80 2.93 2.28 7.18 3.31 11.01 8.93 0.87 0.02 0.00 0.04 0.24 1.43 2.38 1.77 6.45 3.24 10.55 9.01 0.60 0.00 0.00 0.32 0.78 2.12 3.76 2.56 8.90 4.05 14.45 9.34 0.89 0.00 0.00 0.00 0.00 0.07 1.66 1.89 8.99 3.74 10.70 12.93 2.47 0.39 0.00 0.00 0.00 0.25 2.18 1.49 7.27 3.45 7.82 9.28 1.63 0.08 0.01 0.00 0.01 0.52 2.47 1.71 7.57 4.02 9.60 8.89 1.47 0.07 0.00 0.00 0.01 0.30 2.39 1.75 8.06 4.33 8.59 8.42 1.23 0.03 0.06 WY 99 Oct-98 Nov-98 Dec-98 Jan-99 Feb-99 Mar-99 Apr-99 May-99 Jun-99 Jul-99 Aug-99 Sep-99 0.03 1.14 1.06 7.93 6.75 2.03 8.14 3.65 5.93 0.37 0.07 0.00 0.00 0.02 0.00 0.79 3.43 2.02 7.59 3.63 8.94 0.77 0.05 0.00 0.00 0.00 0.00 0.46 2.04 1.08 5.17 1.96 8.10 0.37 0.00 0.00 0.00 0.00 0.00 1.75 3.73 2.93 4.59 3.05 3.59 0.07 0.02 0.00 0.00 0.01 0.00 4.57 5.41 3.30 5.90 1.56 2.05 0.03 0.00 0.00 0.02 0.01 0.01 2.61 3.53 2.17 4.95 2.02 3.51 0.35 0.01 0.00 0.00 0.00 0.00 2.17 3.44 1.97 4.97 2.19 4.40 0.39 0.01 0.00 0.00 0.01 0.00 1.11 3.74 2.32 5.58 2.42 4.99 0.46 0.01 0.00 WY 00 Oct-99 Nov-99 Dec-99 Jan-00 Feb-00 Mar-00 Apr-00 0.01 0.00 0.01 0.03 0.15 0.29 0.12 0.05 0.01 0.14 0.16 0.67 1.07 1.59 0.00 0.00 0.02 0.02 0.44 0.50 0.90 0.00 0.00 0.00 0.00 0.72 0.56 0.55 0.00 0.00 0.00 0.00 0.17 0.34 0.33 0.00 0.00 0.01 0.01 0.27 0.39 0.41 0.00 0.00 0.01 0.01 0.27 0.42 0.51 0.00 0.00 0.00 0.01 0.17 0.28 0.38 A-305 Table G. Continued Water year Month 101 102 May-00 Jun-00 Jul-00 Aug-00 Sep-00 8.71 19.76 2.02 0.15 0.01 3.17 5.27 2.51 0.04 0.03 WY 01 Oct-00 Nov-00 Dec-00 Jan-01 Feb-01 Mar-01 Apr-01 May-01 Jun-01 Jul-01 Aug-01 Sep-01 0.33 1.47 0.46 1.31 3.87 1.44 2.96 12.05 3.36 0.08 0.00 0.00 WY 02 Oct-01 Nov-01 Dec-01 Jan-02 Feb-02 Mar-02 Apr-02 May-02 Jun-02 Jul-02 Aug-02 Sep-02 WY 03 Oct-02 Nov-02 Dec-02 Jan-03 Feb-03 Mar-03 Apr-03 May-03 Jun-03 Jul-03 Aug-03 Sep-03 103 Station number (lbs/acre) 104 106 105 3.03 6.11 1.06 0.00 111 2.48 4.22 0.37 0.00 0.00 2.13 4.38 0.25 0.00 0.00 1.17 1.68 0.30 0.02 0.01 1.51 2.53 0.36 0.01 0.00 0.45 1.04 1.01 2.23 6.01 3.25 1.48 0.63 1.96 0.04 0.00 0.00 0.02 0.89 0.78 1.55 7.21 3.11 0.66 0.22 0.61 0.00 0.00 0.00 0.02 0.75 1.86 1.81 6.51 2.31 1.22 0.49 0.17 1.84 1.42 7.06 0.06 0.52 0.55 0.63 6.59 3.09 1.83 1.03 2.92 0.10 0.00 0.01 0.04 0.56 0.44 0.55 8.13 3.96 1.55 0.93 2.28 0.09 0.00 0.00 0.20 0.14 2.22 0.77 5.14 4.86 5.43 9.26 2.97 0.12 0.00 0.00 0.42 0.48 2.86 1.18 6.53 4.91 6.09 11.97 5.85 0.32 0.15 0.00 0.21 0.17 1.83 0.79 6.48 5.44 6.18 10.63 4.59 0.05 5.54 6.46 0.63 2.74 0.08 0.00 0.00 10.97 7.30 0.23 0.16 0.00 0.31 0.45 1.91 0.64 5.41 5.05 4.15 8.88 3.57 0.25 0.38 0.04 0.23 0.44 2.21 0.61 7.89 7.57 5.25 11.28 4.83 0.24 0.40 0.04 0.00 0.00 0.00 0.00 0.01 0.01 0.01 1.38 1.83 0.13 0.00 0.01 0.00 0.00 0.03 0.13 0.10 0.83 0.82 3.00 3.36 0.54 0.00 0.06 0.00 0.00 0.02 0.12 0.09 0.07 0.44 0.00 0.00 0.00 0.01 0.01 0.05 0.17 0.10 0.19 1.12 0.00 0.00 0.03 0.13 0.10 0.25 0.65 2.81 1.84 1.98 0.09 0.39 A-306 112 1.22 1.48 0.24 0.00 0.00 Table G. Continued Water year Month 101 102 103 Station number (lbs/acre) 104 106 105 111 WY 04 Oct-03 Nov-03 Dec-03 Jan-04 Feb-04 Mar-04 Apr-04 May-04 Jun-04 Jul-04 Aug-04 Sep-04 0.00 0.13 0.81 5.89 1.06 5.51 2.56 4.17 4.12 0.30 0.09 0.03 0.00 0.77 1.78 2.44 0.90 5.16 2.85 4.63 7.12 0.91 0.55 0.45 0.19 1.44 2.37 2.43 0.65 5.04 3.85 3.59 7.11 0.86 0.07 0.04 WY 05 Oct-04 Nov-04 Dec-04 Jan-05 Feb-05 Mar-05 Apr-05 May-05 Jun-05 Jul-05 Aug-05 Sep-05 0.75 6.21 4.73 8.55 3.47 1.55 1.11 0.43 0.84 0.03 0.00 0.02 1.24 4.79 4.17 6.38 3.81 1.67 1.19 0.49 0.31 0.00 0.00 0.01 0.19 3.02 4.43 9.63 4.29 1.62 1.80 0.80 0.29 0.03 0.00 0.00 WY 06 Oct-05 Nov-05 Dec-05 Jan-06 Feb-06 Mar-06 Apr-06 May-06 Jun-06 Jul-06 Aug-06 Sep-06 0.04 0.18 0.27 0.98 0.67 3.40 6.08 2.31 3.24 0.68 0.01 0.00 0.02 0.25 0.52 0.51 0.56 2.11 4.49 3.29 1.34 1.48 1.47 0.38 0.00 0.05 0.11 0.87 0.78 2.96 4.37 1.77 0.41 0.44 0.14 0.04 WY 07 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 0.00 0.03 3.27 5.81 1.31 2.26 0.89 1.17 2.43 8.76 6.52 2.03 4.64 4.30 0.37 0.76 6.26 5.59 1.54 3.70 3.42 A-307 112 Table G. Concluded Water year WY 08 Month 101 102 103 Station number (lbs/acre) 104 106 105 May-07 Jun-07 Jul-07 Aug-07 Sep-07 0.07 0.02 0.00 0.00 0.00 1.67 1.04 0.29 0.00 0.01 1.60 0.62 0.41 0.01 0.00 Oct-07 Nov-07 Dec-07 Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08 Aug-08 Sep-08 0.00 0.01 1.12 3.71 6.50 5.06 4.63 3.26 16.79 5.05 0.16 4.35 0.21 0.00 0.31 3.20 4.91 7.33 3.69 3.47 17.29 5.86 0.07 1.91 0.00 0.12 2.60 4.00 4.35 5.03 2.52 5.10 8.64 3.20 0.19 1.28 A-308 View publication stats 111 112