Originally determined eligible by the Keeper of the National Register in the Caltrans 1985 Historic Metal Truss Bridges in California Thematic Resources study; its continued eligibility was confirmed in the 2004 Caltrans Historic Bridge Inventory update: Metal Truss Bridges.
Jibboom Street Bridge (24C0022) is a two-lane combined cantilever and swing bridge with three steel, rigid-connected truss spans: a Swing through-truss main span, and two Parker through-truss spans. The bridge has cantilevered concrete sidewalks with latticework metal railings. The curved concrete approach on the south end has semicircular-window concrete railings with smooth caps and incised-panel concrete end posts. At 361 feet long, it is the longest swing span among highway bridges in California. By 1958, the operators control house had been removed, after which all the swing mechanisms were removed. In 1965, the wooden sidewalks were replaced with steel ones. The original northern timber trestle approach span was completely replaced by a reinforced-concrete T-girder span in 1969 around which time the sidewalks were laid in concrete.