Built 1827
Bath/Haverhill Covered Bridge (Grafton County, New Hampshire)
Built 1827; rehabilitated 1973Covered bridge over Ammonoosuc River on NH 135Open to Pedestrians
McClay's West Twin Bridge (Franklin County, Pennsylvania)
Built 1827 by Silas HarryStone arch bridge over Conodoguinet Creek on PA 4018Open to traffic
McClays East Twin Bridge (Franklin County, Pennsylvania)
Built 1827 by Silas HarryStone arch bridge over a branch of Conodoguinet Creek on McClays Mill Road (PA 4018)Open to traffic
Merchant Street Bridge (Beaver County, Pennsylvania)
Built 1827; rehabilitated 2004Concrete arch bridge over Big Sewickley Creek on Merchant Street in AmbridgeOpen to traffic