Mercantile Bridge Co.

Blakeman Bridge (Coles County, Illinois)
Built 1907
Three-span arch bridge over Embarras River on TR 193 (Old IL 130)
Open to traffic

Charleroi-Monessen Bridge (Washington County, Pennsylvania)
Built 1906
Through truss bridge over Monongahela River on PA 2018 in Charleroi
Demolished by PennDOT A Few Minutes Before 9:00 AM EDT, July 11, 2011