Folsom, CA Environmental Rules: Erosion Control (2026)

202. Subsection A requires cut and fill slope faces to be prepared and maintained against erosion, with protection installed as soon as practicable and before the site can pass final inspection, unless the public works director determines the cut material itself resists erosion. Subsection B lets the director require an erosion control plan alongside a minor or engineered grading plan, covering construction-phase measures such as hydromulching, berms, interceptor ditches, subsurface drains, terraces and sediment traps, plus the permanent revegetation method and the timing of grading against later landscaping.

Subsection C's revegetation standards require permanent landscaping to start as soon as practical and finish within twelve months of reaching final grade and completing utility work, and every surface disturbed by grading, haul roads or vegetation removal must be prepared for prompt revegetation within thirty days of finishing grading unless it will be paved or otherwise improved. Native plant material is specifically called out as encouraged, to cut irrigation demand, and topsoil stripped for grading must be stockpiled on or near the site, away from tree root systems, for reuse on finished cut and fill surfaces.

Sites disturbed during the rainy season also need a sedimentation control plan with temporary basins, and the permittee stays responsible for maintaining vegetative protection on graded slopes until it is established or the maintenance duty is formally reassigned.