Pitkin County

Busk-Ivanhoe Tunnel   [Map]
Built 1891; Converted to highway use 1922; Closed to traffic 1943; Collapsed 1945
Maroon Creek Bridge   [Map · Street View]
Trestle over Maroon Creek on CO 82 at Aspen
Bypassed by a replacement bridge and left in place for pedstrian use.
Built 1888; converted to vehicular use ca. 1929. Bypassed in 2005.
Sheely Bridge   [Map]
Through truss bridge in Mill Street Park in Aspen
Open to pedestrians only
Built 1911; relocated in 1966