Dunlap's Creek Bridge
Dunlap's Creek Bridge, Historic road bridge in Brownsville, United States.
The Dunlap Creek Bridge features five parallel tubular ribs made of elliptical segments forming an 80-foot-long arch spanning across the waterway.
Completed in 1839, this engineering achievement stands as the first cast iron arch bridge constructed in the United States, designed by Richard Delafield.
The bridge represents early American industrial innovation along the National Road, connecting communities and supporting regional commerce through Pennsylvania.
The Pennsylvania Department of Transportation maintains this structure as part of Market Street, monitoring its condition for public safety and transportation needs.
Three previous bridges at this location failed before engineers implemented the revolutionary cast iron design that continues to function after 184 years.
Location: Pennsylvania
GPS coordinates: 40.02167,-79.88806
Latest update: September 23, 2025 16:45
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