Backbone State Park

Backbone State Park Maquoketa River Bridge (Delaware County, Iowa)
Built 1934
Steel stringer bridge over Maquoketa River on Pk 603(Bkbone)
Open to traffic

Backbone State Park Pedestrian Bridges (Delaware County, Iowa)
Double-intersection Warren pony truss bridge over Maquoketa River on Pedestrian Pathway
East channel closed; west channel lost

Backbone Street Bridge (Delaware County, Iowa)
Built 1934
Steel stringer bridge over Unnamed creek on Pk 603(Bkbone)
Open to traffic