The ECA regulations prior to the 2017 update apply if your project is within the Shoreline District, which includes all land within 200 feet of the shoreline, hydrologically connected wetlands, and …

If you cannot follow the rules for the type of ECA in which your project is located, and your project is not eligible for an exemption or waiver, then you may be able to apply for one of the following types of permits.

Sep 1, 2023 · You can view the new liquefaction-prone ECA layer on our GIS map. The previous liquefaction-prone areas map was based on the 1962 geologic map of Seattle and ground shaking from smaller earthquakes.

These are large-scale maps designed to be printed on a plotter. If you don't have access to a plotter, you can purchase copies of these maps from our Public Resource Center.

SDCI has updated the Environmentally Critical Areas (ECA) Map for Liquefaction-Prone areas. Liquefaction occurs when loose, saturated soils lose their strength due to strong ground shaking (usually from earthquakes).

Jul 28, 2022 · When considering whether an exemption or relief from steep slope erosion hazard area development standards apply as part of a specific development proposal, SDCI determines whether there is an ECA or ECA buffer on the parcel (SMC 25.09.030.B).

See section 25.09.045 of our Seattle Municipal Code for a more complete list of project types that may be exempted from the ECA requirements.

Aug 4, 2022 · SDCI maintains maps of ECAs that you can find on our website (www.seattle.gov/sdci/resources). Our maps are advisory and are intended to help you identify critical areas.

We must periodically review and update our comprehensive plan policies and regulations for environmentally critical areas (ECA) based on the requirements in Washington state’s 1990 Growth Management Act (GMA).

Subject: Environmentally critical areas such as wetlands, areas important for fish and wildlife, riparian corridors, landfills, and geologic hazard areas. Please see the Seattle Municipal Code, Code Section Number 25.09.020 for a more complete description. Category: Keywords: ECA,DSO,GIS,SPU,Critical Areas,Environment AntialiasingMode: None