Wikipedia

South Tenth Street Bridge

The South Tenth Street Bridge, most often called the Tenth Street Bridge, but officially dubbed the Philip Murray Bridge, is a suspension bridge that spans the Monongahela River in Downtown Pittsburgh, Pennsylvania.

South Tenth Street Bridge
Coordinates40°25′57.06″N 79°59′21.17″W / 40.4325167°N 79.9892139°W / 40.4325167; -79.9892139
Carries4 lanes of roadway
CrossesMonongahela River
LocalePittsburgh, Pennsylvania
Official namePhilip Murray Bridge
OwnerAllegheny County[1]
Characteristics
DesignSuspension bridge
Total length1,275 feet (389 m)
Width58 feet (18 m)[2]
Longest span725 feet (221 m)
Clearance below50.3 feet (15.3 m)
History
OpenedFebruary 11, 1933
Statistics
Daily traffic17,500 (2017)[3]
South Tenth Street Bridge
Built1931–33
Architectural styleStreamline Moderne
NRHP reference No.86000020
Added to NRHPJanuary 7, 1986
Location
Map

The only cable suspension bridge that is located in Allegheny County, its 725-foot (221 m) main span is the longest on the Monongahela River.[4] The bridge was renamed on Labor Day 2007 for Philip Murray, the first president of the United Steelworkers of America.[5]

Built between 1931 and 1933, this bridge connects South Tenth Street on the South Side to Second Avenue and the Armstrong Tunnel under the Bluff. A staircase leads from the northern terminus of the bridge up to the campus of Duquesne University on the Bluff.

In 2015, the bridge was one of three bridges to have bike specific lanes installed. It was listed on the National Register of Historic Places in 1986.

Description

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The Tenth Street Bridge is 1,275 feet (389 m) long and has a main span of 725 feet (221 m). It is the only conventional cable suspension bridge in Allegheny County, unlike the Three Sisters which use eyebars instead of cables.[6]

The two cables, each 13 inches (33 cm) in diameter, are anchored in concrete vaults at either end of the span and travel over two 160-foot (49 m) towers resting on stone piers.[7] Suspender cables, arranged in pairs which are spaced 25 feet (7.6 m) apart, transfer the load of the bridge deck to the main cables. There are 28 sets of suspender cables on the main span and 10 on each side span.[2]

The towers and railings are decorated with Streamline Moderne details, attributed to architect Stanley Roush.[8]

The bridge superstructure is painted in the signature "Aztec Gold" color used on several other downtown bridges in Pittsburgh.[9]

History

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First bridge

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A private toll bridge connecting what was then the borough of Birmingham to Pittsburgh at McKee Street (now South 10th Street) was first proposed by the Birmingham Bridge and Road Company, incorporated in 1837. The company also had license to construct a turnpike along Denman Street (South 12th Street) extending to the Monongahela and Coal Hill Turnpike (modern day Arlington Avenue and William Street). The project languished for many years until the company was reincorporated as the Birmingham Bridge Company in 1853, having fully abandoned plans to construct the turnpike.[10] The company completed a three-span, covered wooden lattice truss bridge in 1859.[11] In 1896, the city of Pittsburgh purchased the bridge for $305,000 and abolished the 1-cent toll.[12]

Second bridge

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The 1904 bridge, seen here in 1905

The wooden bridge was in poor condition by the early 1900s and was demolished in 1902.[13] A new steel bridge was completed in 1904.[14] This bridge was a five-span Pratt truss, 50 feet (15 m) wide and 1,400 feet (430 m) long. It was constructed on the two piers remaining from the previous bridge and two new piers.[15]

In 1927, the Armstrong Tunnel was completed, linking the north end of the bridge with Forbes Avenue.

Third bridge

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In 1928, Allegheny County voters approved a $43.7 million bond issue to fund a variety of public works, including the West End Bridge, McKees Rocks Bridge, Saw Mill Run Boulevard, Allegheny River Boulevard, and Allegheny County Airport.[16][17] Also included was funding to replace the Tenth Street Bridge, which was considered to be unsafe for heavy vehicles even though it was not very old.[18] Ownership of the bridge was also transferred from the city to Allegheny County. The existing bridge was demolished in 1931 by the Vang Construction Company, which was also responsible for building the substructure of the replacement bridge.[19] The new suspension bridge was designed by the office of Allegheny County Chief Engineer Vernon R. Covell, with architectural elements designed by Stanley Roush,[8] and the contract for the superstructure was awarded to the American Bridge Company.[20]

 
View of bridge and Duquesne University from the South

The bridge was constructed in 1931–33. After construction of the piers and 116-foot (35 m) towers, workers on suspended catwalks began spinning the two 13-inch (33 cm) diameter steel cables in February, 1932. Each cable was wound from 19 bundles of 256 wires each, for a total of more than 2,500 miles (4,000 km) of wire in the entire bridge.[7] After this work was complete, the structural steel superstructure and bridge deck were installed. The bridge opened with little fanfare on February 11, 1933. The total cost of the project was about $1.6 million.[21]

The Mount Washington Roadway Extension, now the P.J. McArdle Roadway, was completed in September, 1933, providing a highway connection from the south end of the bridge to the Liberty Tunnel and Mount Washington.[22] In addition to road traffic, the bridge was also used by Pittsburgh Railways streetcars on the 53 Carrick route.[23] The line was rerouted to the Smithfield Street Bridge in 1968.[24]

By the 1970s, many parts of the bridge had deteriorated, particularly the deck and electrical system.[2] A $1.8 million rehabilitation project was completed in 1978–79, including structural repairs, deck and sidewalk replacement, painting, and removal of the streetcar tracks.[25][26] The bridge was rehabilitated again in 2017–19 by the American Bridge Company at a cost of $21.1 million. This project included replacement of the deck, sidewalks, and lighting, structural repairs, painting, waterproofing, and installation of a novel system to dehumidify the bridge cables.[3][27]

Geese

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The geese as seen in 2005

The Tenth Street Bridge is known locally for its painted figures of four geese (sometimes described as dinosaurs or "dino-geese") at the top of the south tower, described as "quirky icons" by the Pittsburgh Tribune-Review. Originally an unsanctioned work of street art created in the 1990s,[28] the geese were painted over when the bridge was repainted in 2018. The original artist, Tim Kaulen, launched a petition to restore the geese which gathered enough signatures to win approval from the Allegheny County Council. Kaulen repainted the geese with official permission in October, 2018.[29][9]

See also

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References

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  1. ^ Regan, Bob (2006). The Bridges of Pittsburgh. Pittsburgh: The Local History Company. p. 155. ISBN 0977042928.
  2. ^ a b c Grata, Joe (June 5, 1977). "Anatomy Of A Bridge". Pittsburgh Press. Clippings of the first, second , and third pages via Newspapers.com. Retrieved September 12, 2022.
  3. ^ a b Blazina, Ed (June 11, 2017). "Major rehab of 10th Street Bridge linking Downtown, South Side begins next week". Pittsburgh Post-Gazette. Retrieved September 12, 2022.
  4. ^ "10th Street Bridge (Philip Murray Bridge) - HistoricBridges.org". historicbridges.org. Retrieved 2024-11-19.
  5. ^ United Steelworkers. "Steelworkers, Western Pennsylvania Union Members to Dedicate Philip Murray Bridge following Pittsburgh Labor Day Parade". Retrieved 2007-09-03.
  6. ^ Kidney, Walter C. (1999). Pittsburgh's Bridges Architecture and Engineering. Pittsburgh: Pittsburgh History & Landmarks Foundation. p. 123. ISBN 091667021X.
  7. ^ a b "New Tenth Street Bridge To Use 2,500 Miles of Wire". Pittsburgh Press. March 23, 1932. Retrieved September 11, 2022 – via Newspapers.com.
  8. ^ a b "Pennsylvania Historic Resource Survey Form: South Tenth St. Bridge". National Archives Catalog. Pennsylvania Bureau for Historic Preservation. 1985. Retrieved September 13, 2022.
  9. ^ a b Kirkland, Kevin (October 14, 2018). "Dino geese are back atop the 10th Street Bridge". Pittsburgh Post-Gazette. Retrieved September 12, 2022.
  10. ^ "The Pittsburgh Press from Pittsburgh, Pennsylvania on January 6, 1890 · Page 2". Newspapers.com. Retrieved 2021-03-24.
  11. ^ "Opened". Pittsburgh Gazette. October 7, 1858. Retrieved September 9, 2022 – via Newspapers.com.
  12. ^ "One Toll Bridge Was Made Free". Pittsburg Post. April 5, 1896. Retrieved September 9, 2022 – via Newspapers.com.
  13. ^ "Long Life of an Old Bridge Nearing an End". Pittsburgh Gazette. April 6, 1902. Retrieved September 9, 2022 – via Newspapers.com.
  14. ^ "New Bridge Was Opened". Pittsburg Press. June 20, 1904. Retrieved September 9, 2022 – via Newspapers.com.
  15. ^ Fleming, George Thornton (1916). Pittsburgh, how to See it: A Complete, Reliable Guide Book with Illustrations, the Latest Map and Complete Index. W.G. Johnston.
  16. ^ "County of Allegheny Pennsylvania Notice of Special Election". Pittsburgh Sun-Telegraph. June 9, 1928. Retrieved September 12, 2022 – via Newspapers.com.
  17. ^ "Voters Favor Bond Issue's Seven Items". Pittsburgh Press. June 27, 1928. Clippings of the first page and second page via Newspapers.com. Retrieved September 8, 2022.
  18. ^ "Senate Passes Bridge Order". Pittsburgh Post-Gazette. June 3, 1930. Retrieved September 9, 2022 – via Newspapers.com.
  19. ^ "Sink Bridge in River, Cut It Up by Fire". Pittsburgh Press. June 3, 1931. Retrieved September 9, 2022 – via Newspapers.com.
  20. ^ "South Tenth Span Contract Awarded". Pittsburgh Press. July 29, 1931. Retrieved September 9, 2022 – via Newspapers.com.
  21. ^ "To Open New Bridge Today". Pittsburgh Post-Gazette. February 11, 1933. Retrieved September 11, 2022 – via Newspapers.com.
  22. ^ "New Roadway Opens Sept. 16". Pittsburgh Press. September 1, 1933. Retrieved September 12, 2022 – via Newspapers.com.
  23. ^ Track Map of Trolley Lines of the Pittsburgh Railways Co (PDF). Hoboken, N.J.: Electric Railroaders' Association, Inc. June 1949. Retrieved September 12, 2022 – via TransitGuru Limited.
  24. ^ "2 Trolley Lines To Be Reshuffled". Pittsburgh Press. March 12, 1968. Retrieved September 12, 2022 – via Newspapers.com.
  25. ^ "Commissioners Approve Work On 6 Bridges". Pittsburgh Press. April 22, 1978. Retrieved September 12, 2022 – via Newspapers.com.
  26. ^ "10th St. Bridge To Be Closed". Pittsburgh Press. August 8, 1979. Retrieved September 12, 2022 – via Newspapers.com.
  27. ^ "Phase 2 Work on 10th Street Bridge Rehabilitation Completed". The Pittsburgh Reporter. October 29, 2019. Retrieved January 17, 2024.
  28. ^ Pitz, Marylynne (October 12, 2014). "South Tenth Street Bridge". Pittsburgh Post-Gazette. Retrieved September 12, 2022.
  29. ^ Carr, Dillon (October 15, 2018). "Artist repaints dino geese on Pittsburgh's 10th Street Bridge". Pittsburgh Tribune-Review. Retrieved September 12, 2022.
 
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