Silas Harry

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Elders Bridge (Franklin County, Pennsylvania)
Built 1825
Stone arch bridge over West Branch Conococheague Creek on Hill Road
Open to traffic

Heron Branch Bridge (Franklin County, Pennsylvania)
Built 1825
Lost Stone arch bridge over Muddy Run on Pa 533;Sr 0533 (Orrstown Road)
Replaced by new bridge

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

Mongul Bridge (Franklin County, Pennsylvania)
Built 1840
Lost Closed-spandrel arch bridge over Conodoguinet Creek on Sr 4016 (Roxbury Road)
Replaced by new bridge

Roxbury Mills Bridge (Washington County, Maryland)
Built 1824
Stone arch bridge over Antietam Creek on Roxbury Road in Boonsboro
Open to traffic

The Hitt Bridge (Washington County, Maryland)
Built 1863
Stone arch bridge over Antietam Creek on Keedysville Road in Keedysville
Open to traffic

Van Metre Ford Bridge (Berkeley County, West Virginia)
Built 1832
Stone arch bridge over Opequon Creek on CR 36
Open to traffic

West King Street Bridge (Franklin County, Pennsylvania)
Built 1828
Stone arch bridge over Conococheague Creek on West King Street in Chambersburg
Open to traffic

Wilson's Bridge (Washington County, Maryland)
Built 1819
Stone arch bridge over Conococheague Creek on National Pike
Open to pedestrians