Landslides

The steep hillsides in Mill Valley may be prone to landslide activity especially during the winter storm season. Saturated ground may become a river of mud and rocks that can flow rapidly with little or no warning. Landslides and debris flows have caused severe damage to homes and roads in our community.


If you live in a landslide prone area consider hiring a geologist that specializes in slide risk assessment to complete a ground study of your property.

Learn to recognize potential landslide warning signs:

• Changes occur in your landscape such as patterns of storm-water drainage on slopes
• Water breaks through the ground surface in new locations
• Bulging ground appears at the base of a slope
• New cracks appear in plaster, tile, brick, or foundations
• Fences, retaining walls, utility poles and trees tilt or move
• Collapsed pavement, mud or fallen rock along roadways

How can you minimize your landslide risks?

• Regularly inspect your property for land movement, retaining wall failures and blocked drainage routes
• Meet with your neighbors to discuss and repair mutual drainage problems 
• Prepare an escape route in case you need to evacuate your home because of a slide above or below you

If you discover any earth movement or landslide, immediately leave the area and notify neighbors and City officials.

For more information on Landslide Hazards, visit the USGS Landslide page. 

Download the Disaster Plan Worksheet and Family Emergency Plan Worksheet.