Altoona, Iowa

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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

IAIS - Little Fourmile Creek Arch (Polk County, Iowa)
Stone arch bridge over Little Fourmile Creek on Iowa Interstate Railroad
Open to traffic

IAIS - Little Fourmile Creek Culvert #3 (Polk County, Iowa)
Concrete culvert bridge over Little Fourmile Creek on Iowa Interstate Railroad
Open to traffic

RI - 8th Street Southwest Overpass (E) (Polk County, Iowa)
Built 1955
Lost Pony/through plate girder bridge over 8th Street Southwest on Chicago, Rock Island & Pacific Railroad
Removed