Determined individually eligible by the Keeper of the National Register in the 1986 Caltrans Historic Metal Truss Bridge Thematic survey, and in 1987 it was determined a contributing element of the National Register-eligible Feather River Highway Historic District; its continued eligibility was confirmed in the 2004 Caltrans Historic Bridge Inventory Update: Metal Truss Bridges.
Pulga Bridge (12 0038) is a steel, rigid-connected steel deck truss structure. The main span is a 3-hinged spandrel-braced arch measuring 350 feet long, and the steel girder approach spans rest on steel towers. In 1932 the bridge was the longest steel arch roadway span in California. It features decorative pedestrian rails. It is also a key crossing in the historic Feather River Highway.