Dunlap's Creek Bridge
| Dunlap's Creek Bridge | |
|---|---|
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| Carries | National Road |
| Crosses | Dunlap's Creek |
| Locale | Brownsville, Pennsylvania |
| Designer | Richard Delafield |
| Design | arch bridge |
| Material | cast iron |
| Longest span | 24.4 metres (80 ft)[1] |
| Number of spans | 1 |
| Construction begin | 1836 |
| Construction end | 1839 |
| Coordinates | |
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Dunlap's Creek Bridge
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| Coordinates: | 40°1′18″N 79°53′17″W / 40.02167°N 79.88806°WCoordinates: 40°1′18″N 79°53′17″W / 40.02167°N 79.88806°W |
| Governing body: | State |
| NRHP Reference#: | 78002398[3] |
| Added to NRHP: | July 31, 1978 |
Dunlap's Creek Bridge was the first cast iron, metal arch bridge in the United States. It was designed by Richard Delafield and built by the United States Army Corps of Engineers.[4] Constructed from 1836 to 1839 on the National Road in Brownsville, Pennsylvania, it remains in use today. It is listed on the National Register of Historic Places and is a National Historic Civil Engineering Landmark (1978). It is located in the Brownsville Commercial Historic District.
Contents |
History[edit]
There have been four structures on this site. The first two collapsed in 1808 and 1820. The third, a wood frame structure, needed replacement by 1832.[5]
This bridge is constructed using five parallel tubular ribs, each made of 9 elliptical segments to form the 80 feet (24 m) arch.[4]
Image[edit]
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Plaque commemorating Dunlap's Creek Bridge
See also[edit]
- List of bridges documented by the Historic American Engineering Record in Pennsylvania
- List of Registered Historic Places in Fayette County, Pennsylvania
- List of historic civil engineering landmarks
References[edit]
- Vivian, Cassandra (2003). The National Road in Pennsylvania. Arcadia Publishing. pp. 85–86. ISBN 0-7385-1166-8.
- ^ Dunlap's Creek Bridge at Structurae
- ^ The First Cast Iron Bridge: Historical Marker Database
- ^ "National Register Information System". National Register of Historic Places. National Park Service. 2008-04-15.
- ^ a b Jackson, Donald C. (1988). Great American Bridges and Dams. Wiley. p. 142. ISBN 0-471-14385-5.
- ^ HAER. "Dunlap's Creek Bridge, Spanning Dunlap's Creek, Brownsville, Fayette County, PA". Retrieved 2008-07-16.
External links[edit]
- Dunlap’s Creek Bridge: Historical Marker Database
- Dunlap's Creek Bridge: History and Heritage of Civil Engineering
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