Colonial Building Co.
of Spokane, Washington
Indian Timothy Memorial Bridge (Asotin County, Washington)
Contractor, 1923Bypassed two-span through arch bridge over Alpowa Creek on US 12Open to pedestrians only
Seufert Viaduct (Wasco County, Oregon)
Contractor, 1920Stringer bridge over Fifteen Mile Creek on Viewpoint Road (Historical Columbia River Highway) in The DallesOpen to traffic