Excavation in Culver City
Culver City has been incorporated since 1917, and Ballona Creek runs through most of it. The Baldwin Hills rise on its east side along the Newport–Inglewood Fault Zone, and state maps put more than half of the city in liquefaction zones.
Culver City calls its on-site grading permit a Site Improvement Permit, issued on the city’s engineering side, and the trigger is written around water rather than volume. Whenever a project changes on-site flow lines or drainage patterns, it needs one. A backyard that currently sheets water toward the street and will drain to a new catch basin after the work would count, even if very little soil moves. Stormwater paperwork scales with the site: a job disturbing an acre or more needs a Stormwater Pollution Prevention Plan, and smaller sites file a WPCP instead.
Ballona Creek runs through most of the city, and the lowlands around it make up the bulk of Culver City’s ground. More than half of the city sits in state-mapped liquefaction zones, which puts groundwater and soil type at the center of most foundation and pad designs on the flats. For excavating an ADU pad or an addition here, we work from the soils engineer’s depth and compaction requirements and set the finished grade so the new drainage pattern matches what was permitted.
The east side is different ground. The Baldwin Hills sit at the northern end of the Newport–Inglewood Fault Zone, and the Culver City neighborhoods of Blair Hills and Culver Crest climb onto them. State mapping shows both the Inglewood Fault and the West Pico Fault crossing city limits, part of the Newport–Inglewood–Rose Canyon system, with an earthquake fault zone on the Beverly Hills quadrangle released in January 2018. On lots in those hills, clearing and slope grading take more planning than on the flats, and utility trenches on a slope need the same cave-in protection at five feet as anywhere else in the state.
Culver City borders Mar Vista on the west, and Santa Monica is a short drive out along the 10 or Venice Boulevard.
Excavation and grading across the Los Angeles area:
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