Chambers & Dobson

of New Hampton, Iowa
Hartley Drive Bridge (Allamakee County, Iowa)
Contractor, 1914
Through truss bridge over Upper Iowa River on Hartley Drive
Open to snowmobiles only.

Hawkeye Avenue Bridge (Floyd County, Iowa)
Built 1903
Closed through truss bridge over Shell Rock River on Hawkeye Avenue in Nora Springs
Closed to traffic