National and State Register

Costilla Crossing Bridge

Conejos County

Completed in 1892, this pin/rigid connected, eight-panel Thatcher through truss is significant for its unusual structural style, patented in 1884 by Edwin Thatcher, then Chief Engineer of the Keystone Bridge Company.

Costilla Crossing Bridge crossing the Rio Grande River.

Costilla Crossing Bridge.

Never very popular, only the Wrought Iron Bridge Company manufactured metal versions.  It is the oldest vehicular truss in southern Colorado.  The property is associated with the Highway Bridges in Colorado Multiple Property Submission.