Costilla Crossing Bridge
Two-span Thacher through truss bridge over the Rio Grande on CR G east of Antonito
Open to one-lane traffic
Built 1892 by the Wrought Iron Bridge Co.; rehabilitated 2006

Rito Seco Creek Bridge
Two-span stone arch bridge over Rito Seco Creek on CO 142 in San Luis
Open to traffic
Built 1936

San Luis Bridge
Open-spandrel arch bridge over Culebra Creek on CR 19 in San Luis
Open to pedestrians only
Built 1910-11 by the M.F. Levy Construction Co.