Built 1815

Allegheny River Trail - Rockland Tunnel (Venango County, Pennsylvania)
Built in 1915 for the Pennsylvania Railroad, now used only for Hike/Bike
Tunnel on Allegheny River Trail
Open to pedestrians only

Detters Mill Bridge 38-67-01x (York County, Pennsylvania)
Built 1815; replaced 1965
Lost Burr arch-truss bridge over Conewago Creek on SR 4014 (Harmony Grove Road)
Replaced by new bridge

Old Black Bridge (Covered) (Lawrence County, Pennsylvania)
Built 1815; destroyed by flood 1913
Lost Through truss bridge over Shenango River on Road
Destroyed by flooding