Originally determined ineligible by the Keeper of the National Register in the Caltrans 1985 Historic Concrete Arch Bridges in California Thematic Resources study; it was re-evaluated and determined eligible in 2001 in the "Historic Resource Evaluation Report for the Proposed Rehabilitation of the Schooner Gulch Bridge (10-111)" Caltrans, 2001.
Schooner Gulch Bridge was constructed to replace a 1912 wooden trestle bridge. The new reinforced-concrete T-beam bridge features decorative closed-spandrel arches, reinforced-concrete balusters, pointed-arch window railings and slightly elevated 0.5 meter cantilevered walkways with curbs. Also, the bridge was built on an unusual alignment where girders for the main span, south side span, and south cantilevered span were curved to conform to an 800-foot centerline radius. This is only possible due to the use of torsion steel girders in addition to the usual stirrups.