ISHC Experimental Design
120th Street Bridge (Muscatine County, Iowa)
Built 1937; Replaced 2020Steel rigid frame bridge over an unnamed creek on 120th StreetReplaced by a new bridge
2nd Avenue Overpass (Polk County, Iowa)
Built 1936; rehabilitated 1985Rigid frame bridge over Birdland Drive on 2nd Avenue in Des MoinesReplaced by a new bridge
Hockeys Slough Bridge (Muscatine County, Iowa)
Built 1937Concrete Rigid Frame bridge over Hockeys Slough on Bancroft AvenueOpen to traffic