Most Bay Area municipalities now require certain development or redevelopment projects to incorporate hydromodification management (HM) measures to minimize stream impacts such as excess erosion and sedimentation.These are part of overall “C.3” requirements regarding design for both storm water quality (treatment) and HM. The links below will take you to other sites.
Guidance for builders, developers and property owners on C.3 and HM requirements for projects in BAHM sponsor counties:
Note: The Municipal Regional Stormwater Permit has incorporated new requirements for treatment and Low Impact Development in many Bay Area municipalities, effective December 1, 2011 (read more). Please keep in mind that specific requirements may vary from one jurisdiction to the next.