The ETR Big Island Bridge is a Pratt through truss bridge located near Green River, Wyoming, which carries Sweetwater County Road CN4-4 across the Green River.

The bridge was built from 1909 to 1910 by contractor Charles G. Sheely.

It was named the Big Island Bridge after the Big Island region of Wyoming, which the bridge connected to other parts of the state.

[2] The bridge was added to the National Register of Historic Places on February 22, 1985.

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