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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| 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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