Alpine Tunnel
Abandoned tunnel under the Continental Divide on the Denver, South Park & Pacific Railroad, southwest of St. Elmo
Abandoned and partially caved-in
Built 1880-82 by the Denver, South Park & Pacific Railroad; collapsed and abandoned in 1910

Gunnison River Bridges
Pair of through trusses over the Gunnison River on Old US 50 just west of Gunnison
Open to traffic
Built 1927; replacement bridges built on new alignment in 1957

Quartz Creek Bridge
Wooden pony arch bridge over Quartz Creek on CR 76
Open to traffic
Built 1990