Maple Creek Bridge (Washington County, Pennsylvania)
Built 1912
Concrete arch bridge over Maple Creek on PA 88 in Charleroi
Open to traffic

Mill Street Bridge (Washington County, Pennsylvania)
Built 1908 by American Bridge Co.
Pony truss bridge over Norfolk Southern on Mill Street (Old PA 88) in Fredericktown-Millsboro
Closed to all traffic

Muddy Creek Bridge (Greene County, Pennsylvania)
Built 1921
Concrete arch bridge over Muddy Creek on PA 88 in Fairdale
Open to traffic

Point Marion Bridge (Greene County, Pennsylvania)
Built 1930; rehabilitated 1976
Cantilevered through truss bridge over the Monongahela River on PA Route 88 in Point Marion
Open to traffic

Tenmile Creek PA 88 Bridge (Greene County, Pennsylvania)
Built 1933; rehabilitated 1982
Through truss bridge over Tenmile Creek on PA 88 in Centerville
Open to traffic