The new Western Gate Ranch Bridge crosses Barranca Honda Creek, and replaces a metal bridge, two corrugated steel culverts, concrete features, and a former dip crossing. The new bridge is a simple span, prefabricated steel bridge designed for H-20 loading, and of 90 feet in length and 13 feet in width. Rock rip-rap was placed as erosion protection on the creek bank at each abutment. As the new bridge is longer than the previous bridge, the realignment of a bend in the road at the bridge’s west end was accomplished. Earth Systems geotechnical engineering investigation included site reconnaissance, field exploration, laboratory testing, and analysis of data. Subsequent geotechnical recommendations were provided for foundations including conventional and drilled cast-in-place caissons, for lateral pressures and wing walls, and earthwork and abutment backfill. During construction operations, Earth Systems performed foundation excavation observations, certification of grading operations, and inspection of concrete placement.