Flooding and Storm Resources

San Anselmo and Sleepy Hollow Creeks periodically flood. This natural process, caused by the clay soils, topography and climate of the Ross Valley has been exacerbated by human development; undersized bridges and building span the creek, railroad berms across the floodplain, and increased impervious surface throughout the watershed. These are the Town's key messages and flood-related information links.

Current Flood Projects

Know Your Risk:

  1. Flood risk is described by FEMA maps
       2015 Local Hazard Mitigation Plan Flood Risk Assessment
  2. Insure according to your risk
      Flood Maps and Insurance Information
      Elevation Certificate Fact Sheet

Build Responsibly:

  1. Get an Elevation Certificate
       List of Elevation Certificates on File
  2. All construction projects must meet flood protection and water quality rules
      FEMA Guide to Flood Repairs
      Flood Plain Development Permit
      Flood Gate Design
  3. Keep drainage-ways clear
  4. Limit impervious surfaces

You live in a watershed:

  1. Protect the Creek
      Marin County Watershed Program
      Friends of Corte Madera Creek
  2. Flooding is Natural and Historical
       Historical Museum Flooding Webpage
  3. Preserve and restore natural floodplain function

Stay Informed:

  1. Of approaching storms
       Real-Time Weather and Creek Depth
  2. About Regional Flood Control Activities
       Ross Valley Flood Protection and Watershed Program- Flood Zone 9
  3. About Local Flood Control
             San Anselmo Flood Committee 
        Town Community Rating System Activities
        Sand Bag Information
        Winter Preparedness Tips

Stay Safe:

  1. Be Prepared
             Town Disaster Preparedness Links
        Ross Valley Flood Protection Tips
        Flood Preparation Tips (UK)
        American Red Cross Safety Library
  2.  Don’t Drive Through Floodwaters
  3. Turn Around –Don’t Drown
  4. Clean Up After Floods
       After Flood Fact Sheet
       Floodwaters Carry Contaminants, Prevent Mildew
For more information about flood maps, including inquiries about your building's location relative to the floodplain, you may come to our Town offices during open hours.