California Landslide Hazards mapping
Oregon Landslide Hazards mapping
Washington Landslide Hazards mapping
Every year, in all three states, minor land or mudslides occur and predominately in the specifically marked areas posted above. It would behoove residents to educate themselves on the layout of their land and what is the composition of the soil or rocks beneath. What would be the effects of heavy rains? Unfortunately, a rare but major slide like that in Oso Washington, is a wake-up call.