Tunkhannock Viaduct
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| Tunkhannock Viaduct | |
|---|---|
 A Steamtown National Historic Site excursion train crosses Tunkhannock Viaduct. |
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| Carries | railroad traffic |
| Crosses | Tunkhannock Creek |
| Locale | Nicholson, Pennsylvania, USA |
| Designer | Abraham Burton Cohen |
| Design | Deck arch bridge |
| Material | concrete |
| Number of spans | 10 |
| Piers in water | 13 |
| Longest span | 180 feet (55 m) each span |
| Total length | 2,375 feet (724 m) |
| Width | two tracks |
| Clearance below | 240 feet (73 m) |
| Beginning date of construction | May 1912 |
| Opening date | November 6, 1915 |
| Coordinates | 41°37′20″N 75°46′38″W / 41.622205°N -75.777335°ECoordinates: 41°37′20″N 75°46′38″W / 41.622205°N -75.777335°E |
| Tunkhannock Viaduct | |
|---|---|
| U.S. National Register of Historic Places | |
  Location in Pennsylvania
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| Coordinates: | 41°37′20″N 75°46′38″W / 41.622205°N 75.777335°W |
| Built/Founded: | 1912-1915 |
| Added to NRHP: | April 11, 1977[1] |
Tunkhannock Viaduct (also known as the Nicholson Bridge) is a concrete deck arch bridge that spans the Tunkhannock Creek in Nicholson, Wyoming County, Pennsylvania in the United States. It was the largest[clarification needed] reinforced concrete structure of its kind when it opened.[2]
The bridge contains about 169,000 cubic yards (129,000 m3) of concrete and 1,240 short tons (1,120 t) of steel.[3] It is 2,375 feet (724 m) long and 240 feet (73 m) tall when measured from the creek bed (300 feet (91 m) tall from the bedrock). The bridge was built as part of the Clark's Summit-Hallstead Cutoff, which was part of a project of the Lackawanna Railroad to revamp a winding and hilly system. This rerouting was built between Scranton, Pennsylvania and Binghamton, New York. All thirteen piers were excavated to bedrock, which was up to 138 feet (42 m) below ground level. Almost half of the bulk of the bridge is underground.
The bridge was built by the Delaware, Lackawanna and Western Railroad and was designed by Abraham Burton Cohen.[4]. Construction on the bridge began in May 1912, and dedication took place on November 6, 1915.[5] It was listed on the National Register of Historic Places on April 11, 1977.[1]
Contents |
[edit] Gallery
 Tunkhannock Viaduct under construction in 1914 |
 Tunkhannock Viaduct from a commercial airline flight from Ottawa to Philadelphia |
 Tunkhannock Viaduct, as seen from Route 11 |
[edit] Notes
- ^ a b "National Register Information System". National Register of Historic Places. National Park Service. http://www.nr.nps.gov/.
- ^ "PHMC: Historical Markers Program". http://www.phmc.state.pa.us/bah/DOH/markerresults.asp?secid=31&namesearch=tunkhannock+viaduct&Submit=Search+by+Marker+Title.
- ^ Volume estimate from "Progress of Tunkhannock Viaduct Construction on D., L. & W. Relocation," Engineering Record 68, No. 22 (29 Nov. 1913): 594. Citation needed for steel weight estimate.
- ^ "The Nicholson Bridge". http://www.pocono.org/nicholson.html.
- ^ "Northeast Pennsylvania, Nicholson Viaduct". http://www.northeastpennsylvania.com/NicholsonViaduct.htm.
[edit] References
- Plowden, David (2002). Bridges: The Spans of North America. New York, NY: W.W. Norton and Company.
- "Tunkhannock Viaduct". Historic American Engineering Record. http://hdl.loc.gov/loc.pnp/hhh.pa1629. Retrieved on 2006-07-02.
- "Tunkhannock Viaduct". ASCE History and Heritage of Civil Engineering. http://www.asce.org/history/brdg_thannock.html. Retrieved on 2006-07-03.
[edit] See also
[edit] External links
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