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News Release

May 19, 2006
InÚs Pearce (Seattle Project Impact) 206-605-6057
Bill Lukas (U.S. Geological Survey) 206-220-4576

New Seattle Landslide Maps
USGS maps provide greater detail for owners of landslide prone property

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Experts at the United States Geological Survey (USGS) have produced a series of new landslide maps of Seattle that will provide property owners, government agencies and utilities with improved landslide information. The new maps include a Shallow Landslide Hazard Map; Landslide Terrain Map using LIDAR Imagery; Map of Landslide Probability and Recurrence; Prototype Maps Linked to Rainfall; Rainfall Thresholds for Landslides and Early Warning; and Deep Landslide Hazards Map.

"We are very pleased to have these new resources," said City of Seattle Emergency Management Director, Barb Graff. "An improved understanding of landslide hazards in Seattle can help government and private property owners reduce the threat to both people and property."

The new maps are the product of a multi-year study by the USGS following the devastating landslides in the region in 1996/97 and are part of the larger Seattle Project Impact, a public-private partnership, to improve safety in the region against such natural hazards as landslides and earthquakes.

Since 1997, the City of Seattle has

City of Seattle staff have begun a review of the maps to determine how this information can assist regulators and property owners in protecting against landslide hazards and damage. The maps generally reinforce and confirm information provided in Environmentally Critical Areas maps currently used by the City of Seattle.

Several USGS maps and reports related to landslide hazards in Seattle are available online at The new maps identifying shallow and deep landslide hazards will be available soon.

For more information about the Seattle Project Impact programs led by Emergency Management, contact: InÚs Pearce (206) 615-0288

Or visit:

For more information about the city's role in regulating development in landslide hazard areas, contact: Alan Justad (206) 233-3891

Or visit the DPD website:

The USGS serves the nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.

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