Sarnia Bridge Co.

of Sarnia, Ontario, Canada
Big Salt River Bridge (Midland County, Michigan)
Built 1920
Lost pony truss bridge over Big Salt River on North Saginaw Road in Sanford
Relocated to Perrine Road in 2001

Blue Water Bridge (St. Clair County, Michigan)
Built 1938
Through truss bridge over St. Clair River on Westbound I-94 in Port Huron
Open to traffic

Perrine Road Bridge (Midland County, Michigan)
Built 1920
Parker pony truss bridge over Sturgeon Ck on Perrine Rd
Open to traffic, 62 ton weight limit