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Shoreline Slope Stability [Washington (State)]

Washington State Department of Ecology, Shorelands and Coastal Zone Management Program Full Details

Full Details

Title
Shoreline Slope Stability [Washington (State)]
Description
The digital maps presented here were originally published as hard copy maps in the Coastal Zone Atlas of Washington between 1978 and 1980. Although the Atlas has been out of print for many years, the maps contain information that remain the basis for local planning decisions. After receiving multiple requests for electronic versions of portions of the Atlas, an effort was made to scan, georeference and digitize aspects of the Atlas, beginning with the slope stability maps. These maps indicate the relative stability of coastal slopes as interpreted by geologists based on aerial photographs, geological mapping, topography, and field observations. Such methods are standard, but may occasionally result in some unstable areas being overlooked and in some stable areas being incorrectly identified as unstable. Further inaccuracies are introduced to the data through the process of converting the published maps into digital format. Important land use or building decisions should always be based on detailed geotechnical investigations. This mapping represents conditions observed in the early and mid-1970s. Shorelines and steep slopes are dynamic areas and many landslides have occurred since that time that are not reflected on these maps. Subsequent human activities may have increased or decreased the stability of some areas.
Creator
Washington State Department of Ecology, Shorelands and Coastal Zone Management Program
Temporal Coverage
Last modified 2023-04-13
Date Issued
2023-04-13
Access Rights
Public
Format
File
Language
English
Date Added
August 28, 2025

Location

Links

Cite and Reference

  • Citation
    Washington State Department of Ecology, Shorelands and Coastal Zone Management Program (2023). Shoreline Slope Stability [Washington (State)]. . https://geo.wa.gov/maps/waecy::shoreline-slope-stability (web service)
  • BTAA Geoportal Link

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