Altoona, Iowa

Adventureland Railroad - Adventureland Lake Bridge (Polk County, Iowa)
Steel stringer bridge over Adventureland Lake on Adventureland Railroad
Open to traffic

DCI - 80th Street Overpass (Polk County, Iowa)
Built ?; Removed ca 1946
Lost Deck plate girder bridge over 80th Street on Des Moines & Central Iowa Railway
Removed

IAIS - 8th Street Southwest Overpass (Polk County, Iowa)
Pony/through plate girder bridge over 8th Street SW on Railroad
Open to traffic