Manayunk Bridge

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Manayunk Bridge
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The then-unused Manayunk Bridge in 1999
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Characteristics
DesignOpen spandrel deck arch
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Rail characteristics
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History
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Construction end1918
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The Manayunk Bridge (also known as the Manayunk Viaduct, Pencoyd Viaduct, and Schuylkill River Railroad Bridge[1]) is an S-shaped former railroad bridge over the Schuylkill River, Schuylkill Canal and Schuylkill Expressway, that connects Bala Cynwyd, Montgomery County and the Manayunk neighborhood of Philadelphia, Pennsylvania. Closed to rail traffic in 1986, it is now an extension of the Cynwyd Heritage Trail (along the river's west bank) and connects to the Schuylkill River Trail (along the east bank).

History

File:1917 Manayunk Bridge.png
The bridge under construction, c. 1917

Built by the former Schuylkill Valley Division of the Pennsylvania Railroad, it is a large concrete open spandrel arch bridge built in an "S curve," earning both the current concrete bridge and its 1883 wrought-iron-truss predecessor the nickname of "S-Bridge."[2] The bridge's challenging geometry was executed by T. L. Eyre, a Philadelphia contractor. Another notable feature is the saw-toothed construction joints along a 65-degree skew.[3]

In 1976, SEPTA purchased the bridge for its Ivy Ridge Line (now Cynwyd Line). Ten years later, after weather-related expansion and contraction of the bridge, and the shedding of pieces of concrete due to spalling, SEPTA closed the bridge on October 25, 1986, truncating service at Cynwyd and suspended service to three of the line's six stations (Ivy Ridge, West Manayunk, and Barmouth).[4] Between 1996 and 1999, the bridge was stabilized and refurbished.[5] The effort determined that the internal steel reinforcement was not compromised, as SEPTA had feared.[2] Further investigation by Urban Engineers determined that the bridge was safe and only needed surface work to stop the spalling.[2] SEPTA did not resume service to Ivy Ridge; in 1996 low ridership led SEPTA to consider discontinuing service to Cynwyd altogether.[6]

Between 2008 and June 2010, SEPTA removed the 2.5 miles (4.0 km) of tracks north of Cynwyd for the Cynwyd Heritage Trail[7] and Ivy Ridge Rail Trail.[8] The Manayunk Bridge Trail, a conversion of the bridge into a rail trail, opened on October 30, 2015.

See also

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.Treese, Lorett (2003). Railroads of Pennsylvania: Fragments of the Past in the Keystone Landscape. Stackpole Books. p. 40. ISBN 9780811726221 – via Google Books.
  2. ^ a b c Page Module:Citation/CS1/styles.css has no content.Spivey, Justin M. (April 2000). "Pennsylvania Railroad, Manayunk Bridge" (PDF). Historic American Engineering Record. Washington, D.C.: Library of Congress. Retrieved March 3, 2018.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Wolf, Albert M. (February 9, 1918). "New Pennsylvania Railroad Bridge at Manayunk, Pa". Railway Review. 62 (6): 194–199.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Starting the Second Life of a Manayunk Icon". July 16, 2014.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Veksler, Rafail; Thorat, Abhay P. (September 1999). "The Arch Bridge Mystery". Civil Engineering. 69 (9): 48–51.
  6. ^ Template:Williams-Philadelphia
  7. ^ Page Module:Citation/CS1/styles.css has no content."Friends of the Cynwyd Heritage Trail".
  8. ^ Page Module:Citation/CS1/styles.css has no content."Ivy Ridge Green". Archived from the original on July 26, 2011. Retrieved September 8, 2011.

Further reading

Page Template:Sister-inline/styles.css has no content.Script error: No such module "Sister project logo". Media related to Script error: No such module "Commons link". at Wikimedia Commons

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