Originally determined eligible in the Caltrans 1985 Historic Masonry Bridges in California Thematic Resources study; its continued eligibility was confirmed in the 2003 Caltrans Historic Bridge Inventory update: Masonry Bridges. In 2005, it was individually listed on the National Register under the Historic Highway Bridges of California MPS.
The Carneros Creek Bridge is a two-lane single-span, earth-filled, closed-spandrel masonry-arch bridge. The masonry structure is comprised of square-cut stone laid in regular courses. The north railing was removed and reconstructed with the original stone when the bridge was widened in 1914. The south railing is also made of square-cut stone. A small section of the west side of the south railing has been replaced with a concrete railing.