Humboldt, Iowa

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3 Rivers Trail - IA-3 Overpass (Humboldt County, Iowa)
Built 1956
Steel stringer bridge over IA3 on 3 Rivers Trail
Open to pedestrians only

3 Rivers Trail Overpass (Humboldt County, Iowa)
Built 1917
Pony/through plate girder bridge over 3 Rivers Trail on 3 Rivers Trail
Open to pedestrians

C&NW Bridge #2544 (Humboldt County, Iowa)
Built 1902
Stone arch bridge over Drainage on Three Rivers Trail
Open to pedestrians only

Grant Street Bridge (Humboldt County, Iowa)
Built 1877 by the Ohio Bridge Co. of Cleveland; replaced 1906
Lost Bowstring through truss bridge over West Fork Des Moines River on Lewis Street
Replaced by new bridge

Lewis Street Bridge (Humboldt County, Iowa)
Built 1906, closed in the 70s, demolished 1981
Lost two-span through truss bridge over West Fork Des Moines River on Lewis Street in Humboldt
No longer exists

Sumner Avenue Bridge (Humboldt County, Iowa)
Built 1919; rebabilitated in 2005; Replaced 2014
Three-span concrete arch bridge over West Fork Des Moines River on Sumner Avenue in Humboldt
Demolished