This was the first cast-iron bridge built in the USA. The engineer choose to use iron because he could not find any stone in the area that was strong enough to build a 100' (30m) arch bridge. [HAER_data]
I learned about this bridge while researching the oldest extant all-metal truss bridge in the USA.
It looks like it is a rather flat arch.
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| HAER PA,26-BROVI,2--1 1. GENERAL VIEW LOOKING NORTH, SHOWING WESTERN HALF OF BRIDGE SPAN - Dunlap's Creek Bridge, Spanning Dunlap's Creek, Brownsville, Fayette County, PA |
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| ExplorePaHistory |
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| HAER PA,26-BROVI,2--6 6. VIEW LOOKING WEST, SHOWING ABUTMENT AND CAST IRON ARCH SEATS |
It has a lattice spandrel. And a much wider deck was added to the bridge in the 1920s.
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| HAER PA,26-BROVI,2--4 4. DETAIL VIEW, SHOWING CAST IRON ARCH AND STEEL MODIFICATIONS |
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| asce "The Dunlap's Creek Bridge is the oldest all-metal arch bridge in the United States. It demonstrated the feasibility of using cast iron in bridge construction." |
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| Fayette County Historical Society/Abel Colley Tavern & Museum posted The first cast iron bridge in the United States was built in Brownsville and is going to get some tender loving care! The bridge was designed by Richard Delafield. It was built by the United States Army Corps of Engineers. Construction started in 1836, completed in 1839, along the National Road going over Dunlap’s Creek. It will be exciting to see this National Historic Civil Engineering Landmark restored! We’ll keep you posted! |
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| PennDOT_project The project to rehabilitate this and the adjacent Brownsville Avenue Bridge is expected to cost $9-10m. |
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| PennDOT_article |
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