Ponakin Bridge, Historic iron bridge in Lancaster, United States.
The Ponakin Bridge stretches 100 feet across the Nashua River, featuring eight paneled sections constructed with iron and supported by granite stone abutments.
Built in 1871 by the Watson Manufacturing Company of Paterson, New Jersey, this Post truss bridge replaced earlier wooden structures that dated back to the 17th century.
The bridge earned recognition on the National Register of Historic Places in 1979, marking its importance in American civil engineering and transportation development.
Located several miles north of Lancaster's center, the bridge connected Massachusetts Route 70 with Ponakin Road until its closure due to structural concerns.
This structure stands as the only remaining all-metal Post truss bridge in the United States, incorporating patented connection details from engineer Simeon Post's 1863 design.
Location: Massachusetts
GPS coordinates: 42.48111,-71.68583
Latest update: March 8, 2025 04:38
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