ECA - Potential Slide Area

Displays areas with potential landslides in the City of Seattle.

A polygon feature class showing potential landslide areas. Used to implement and regulate the City of Seattle's Environmentally Critical Areas (ECA) policies. Last updated in 2001 via the Seattle Landslide Study. The original data was created from City of Seattle State Environmental Policy Act (SEPA) maps which table digitized in 1995 by Donald Tubbs. Shannon & Wilson added runoff zones & edge smoothing.
Organization: City of Seattle
Organization URL: https://catalog.data.gov/organization/seattle-wa
Last updated: 2026-02-17
Tags: eca, environmental, landuse, planning, sdci, seattle gis open data