Moreno Valley, CA Environmental Rules: Erosion Control (2026)

The erosion control plan goes to the city engineer concurrent with the grading permit application; for a single residential lot the plan can be waived if an approved erosion control system is installed, placed, planted or constructed before October 1. Approved plans must be updated by October 1 each year for any project still under an active grading permit, and the city engineer can order a halt to grading, clearing or other land disturbance on determining that weather, soil, slope or site conditions threaten serious accelerated erosion or sediment damage on-site or downstream.

Processing an erosion control plan requires payment of plan checking fees, inspection fees and posting of security; the first submittal must include the plan checking fee, two blueline copies of the plans and two copies of the bond estimate. The plan itself must list a 24-hour emergency telephone number for the person responsible for erosion control work, carry the stamp and signature of the preparing civil engineer, identify every desilting and erosion protection facility needed to keep sediment off adjacent property, mark which streets and drainage devices will be paved by October 1, and schedule ongoing maintenance of the required facilities.

Once built, erosion control systems must contain all sediment on-site: berms, swales, ditches or filter strips detain or filter runoff from disturbed areas, and energy dissipaters are required wherever concentrated runoff discharges to natural ground or channels to prevent erosion at the discharge point. Sediment control has to stay in place through the entire construction process, with plan updates required for any construction phase the original approval did not cover.