It was a Pratt pony truss bridge built by the Canton Bridge Company of Canton, Ohio.

The Canton Bridge Company built four steel bridges in Wyoming in 1914; when nominated to the National Register of Historic Places in 1982, the ECS Bridge was the only one of these surviving in its original location.

[2]: 7 It was one of 171 Wyoming bridges surveyed in a study that led to the nomination of 31 of them for NRHP listing.

[2] The ECS bridge was listed on the National Register of Historic Places (NRHP) in 1985.

This article about a property in Wyoming on the National Register of Historic Places is a stub.