Built 1827

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Bath/Haverhill Covered Bridge 29-05-04 (Grafton County, New Hampshire)
Built 1827; rehabilitated 1973; Bypassed 1998; rehabilitated 2004
Covered bridge over Ammonoosuc River on NH 135
Open to Pedestrians

Bow Ridge Aqueduct (Indiana County, Pennsylvania)
Built 1827
Lost stone arch aqueduct over Conemaugh River on former Pennsylvania Main Line Canal
Demolished

Eagle Bridge (Older) (Rensselaer County, New York)
Built 1827; Replaced 1899
Lost Burr arch-truss bridge over Hoosic River on Road
Replaced by a new bridge

Gervais Street Bridge (1st) (Lexington County, South Carolina)
Built 1827; Burnt Febuary 14th, 1865 by Confederate soldiers; Replaced 1870
Lost Timber stringer bridge over Congaree River on Gervais Street
Arsoned by Confederate troops 1865; Replaced by new bridge 1870

Maclay's East Twin Bridge (Franklin County, Pennsylvania)
Built 1827 by Silas Harry
Stone arch bridge over a branch of Conodoguinet Creek on McClays Mill Road (PA 4018)
Open to traffic

Maclay's West Twin Bridge (Franklin County, Pennsylvania)
Built 1827 by Silas Harry
Stone arch bridge over Conodoguinet Creek on PA 4018
Open to traffic

Merchant Street Bridge (Beaver County, Pennsylvania)
Built 1827; rehabilitated 2004
Concrete arch bridge over Big Sewickley Creek on Merchant Street in Ambridge
Open to traffic

Swamp Creek Bridge (Montgomery County, Pennsylvania)
Built 1827; rehabilitated 1929
Closed-spandrel arch bridge over Swamp Creek on Swamp Pike
Open to traffic

Taylor Falls Covered Bridge (Hillsborough County, New Hampshire)
Built 1827; Replaced 1881
Lost Burr arch-truss bridge over Merrimack River on Road
Replaced by a new bridge

Union Canal Tunnel (Lebanon County, Pennsylvania)
Completed 1827; canal closed 1880's; purchased by LCHS in 1950.
Tunnel under Tunnel Hill; Tunnel Hill Road on Union Canal
Stable. Repairs were made to portals in 2000 & 2002