ELS Bridge over Big Wind River

The ELS Bridge over Big Wind River is a pony truss bridge located near Dubois, Wyoming, which carries Fremont County Road CN10-21 across the Big Wind River. The bridge was built circa 1920. Its design is uncommon and merges a kingpost truss with an arched chord. The materials used to build the bridge are also unusual and were likely salvaged; for instance, the arches are made from tunnel sets.

The bridge was added to the National Register of Historic Places on February 22, 1985. It was one of several bridges added to the National Register for their role in the history of Wyoming bridge construction. The bridge was replaced by 2006.