Santa Inez Avenue Bridge (35C0090) is a simple riveted-steel, through-plate girder structure with rolled-steel beam side spans over sidewalks with steel bents and reinforced-concrete cantilevered abutments. The bridge is one of four similar railroad bridges located along three-tenths of a mile of track over four parallel streets in the City of San Mateo (from north to south): East Poplar, Santa Inez, Monte Diablo, and Tilton Avenues. A dry-laid random-ashlar masonry retaining wall runs along the east side of the tracks. The retaining wall stands approximately 7' tall at Monte Diablo Avenue and gradually decreases to approximately 3' tall near the Tilton Avenue underpass.
"Finding of Adverse Effect: Caltrain San Mateo Bridges Replacement Project, Caltrain MP 17.20, 17.24, 17.45, and 17.53, In the City of San Mateo, San Mateo County, California" Unpublished report. JRP Historical Consulting, 2006.