Web services > Washington (State)--Clallam County > 2020-2024

Channel Migration Assessment Map Index [Washington (State)--Clallam County]

WA State Department of Ecology · 2022 Full Details

Georeferenced: false
Attribute Value
Click on map to inspect values

Full Details

Title
Channel Migration Assessment Map Index [Washington (State)--Clallam County]
Description
Channel Migration Assessment Map Index for PDF maps created by WA Dept. of Ecology. The Washington Department of Ecology Shorelines and Environmental Assistance Program is responsible for managing Shoreline Master Program (SMP) updates and providing technical and policy assistance to local communities. The Department of Ecology provided these maps of the general location of channel migration zones for WRIA 20 shoreline streams in Clallam County. Funding was provided through Shoreline Master Program grant. The Washington State Shoreline Management Act (SMA) and administrative codes require that communities identify the general location of channel migration zones (CMZs) and regulate development within these areas on shoreline streams (WAC 173-26-201(3) (c) (vii)). Shoreline streams are defined as those with a mean annual flow equal or greater than 20 cfs. The Washington Department of Ecology (Ecology) developed a planning-level CMZ delineation (pCMZ) method to support local communities' updates and implementation of the SMA requirements. The method was used by Ecology to map CMZs for shoreline communities.
Creator
WA State Department of Ecology
Temporal Coverage
Last Modified: 2022-12-07
Date Issued
2022-12-07
Rights
None. The CMZ maps are only planning level and developed using GIS without field verification. They are only appropriate for planning purposes and do not depict channel migration and related hazards on a particular site or reach.
Access Rights
Public
Format
ArcGIS FeatureLayer
Language
English
Date Added
November 30, 2025
Provenance Statement
The metadata for this resource was last retrieved from Clallam County GIS Portal on 2025-11-30.

Links

Cite and Reference

  • Citation
    WA State Department of Ecology (2022). Channel Migration Assessment Map Index [Washington (State)--Clallam County]. . https://clallam-county-portal-clallam.hub.arcgis.com/datasets/clallam::channel-migration-assessment-map-index (web service)
  • BTAA Geoportal Link

View more items like this one...

Shoreline Management Act (SMA) Jurisdiction: Original WAC Chapter 173-18 Streams [Washi...

2025

Shoreline Management Act (SMA) Jurisdiction: Adopted Streams [Washington (State)]

2025

Clallam County GIS Portal

Shoreline Master Plan Environmental Designations [Washington (State)--Kitsap County]

2025

Channel Migration Zones [Washington (State)--Kittitas County]

2022

Shoreline Management Act (SMA) Jurisdiction: Adopted Waterbodies [Washington (State)]

2025

lidar 10ft [Washington (State)--Clallam County]

2022

lidar 50ft [Washington (State)--Clallam County]

2022

Shoreline Designations [Washington (State)--Grant County]

2019

Parcel Published Public [Washington (State)--Clallam County]

2025