drawbridges:
Keokuk & Hamilton Bridge
drawbridges:
US Route 20 Bridge
drawbridges:
Fort Madison Bridge
drawbridges:
Rock Island Government Bridge
drawbridges:
Crescent Railroad Bridge
drawbridges:
Canadian National Railroad Bridge
drawbridges:
Iowa Chicago & Eastern Railroad Bridge
drawbridges:
Burlington Railroad Bridge
drawbridges:
Canadian National Railroad Bridge
drawbridges:
Chicago & Northwestern Railroad Bridge
drawbridges:
Burlington Northern & Santa Fe Railroad Bridge
drawbridges:
Okoboji Swing Bridge
drawbridges:
Pella Bridge
drawbridges:
Okoboji Road Bridge
drawbridges:
Government Arsenal Rail Bridge