Denison, Iowa

CN - Boyer River Bridge (Near Denison) (Crawford County, Iowa)
Built 1899, Piers Rebuilt 1948
Pratt Through truss bridge over Boyer River on Canadian National Railway
Open to traffic

UP - Boyer River Bridge (Near Denison) (Crawford County, Iowa)
Built 1948
Warren Through truss bridge over Boyer River on Union Pacific Railroad
Open to traffic

UP - East Branch Boyer River Bridge (Crawford County, Iowa)
Built 1902 as double track bridge; third track and third truss line added in 1910.
Quadrangular Lattice Through Truss Bridge over Boyer River on Union Pacific Railroad
Open to traffic

Yellow Smoke Park Bridge (Crawford County, Iowa)
Built in Paradise, Iowa in 1945 Relocated to Yellow Smoke Park 1986
Pony truss bridge on Pedestrian Walkway near Denison
Open to pedestrians