Koss Construction Co.
First Avenue Bridge (Linn County, Iowa)Built 1920
Open-spandrel arch bridge over Cedar River on First Avenue (Business US 151/IA 922) in Cedar Rapids
Open to traffic
Galena Y Bridge (Stone County, Missouri)Contractor, 1927
Five-span open-spandrel arch bridge with Y-shaped approach over James River at Galena
Open to pedestrians only
Hawkeye Avenue Bridge (Webster County, Iowa)Built 1919
Lost Open-spandrel arch bridge over Des Moines River on E Hawkeye Avenue in Fort Dodge
Replaced by new bridge
Keigley Branch Bridge (Story County, Iowa)Built 1913
Concrete arch bridge over Keigley Branch on 550th Avenue
Open to traffic
Roubidoux Bridge (Pulaski County, Missouri)Contractor, 1923
Five-span concrete arch bridge over Roubidoux Creek on MO 17 in Waynesville
Open to two-lane traffic
Shiawasse Street Bridge (Ingham County, Michigan)Built 1923
Lost Closed-spandrel arch bridge over Grand River on Shiawassee Street in Lansing
Replaced by new bridge