State Enviromental Policy Act (SEPA)
Mitigated Determination of Non-Significance
River Facilities Vegetation Management Program
Notification is hereby given that The King County Water and Land Resources (WLRD) Division, River and Floodplain Management Program, proposes vegetation management activities on King County maintained levees and revetments. These activities include:
1) Removal of vegetation in the Sammamish River Transition Zone as required by the United States Army Corps of Engineers.
2) Harvesting of cuttings from native plants (primarily willow and red twig dogwood) for flood protection repair and retrofit projects.
3) Removal of state and county listed noxious weeds, weeds of concern and other invasive vegetation from King County levees and revetments and associated properties.
4) Removal of trees deemed to be a hazard to people, property or infrastructure (specifically flood protection facilities).
5) Thinning of native vegetation to allow the inspection of flood protection facilities. Total thinning per this checklist is limited to the amount of cuttings needed for flood protection facility repair and retrofit projects.
The vegetation management activities covered by this MDNS are limited to King County flood protection facilities located on King County’s major rivers and large streams. These waterbodies include the six major rivers in King County--the South Fork Skykomish, Snoqualmie, Sammamish, Cedar, Green, and White Rivers and their large tributaries; and Issaquah Creek.
The following links provide access to the completed environmental checklist for this work, and the willow cutting best management practices used by the River Facilities Vegetation Management Program.
King County levee and revetment maps with the locations upon which the vegetation management work described in the programmatic SEPA checklist may occur are linked below.
Environmental checklist (Acrobat PDF format)
Best management practices for procurement and use of willows and other native shrub cuttings (Acrobat PDF format)
Comments on this project must be received no later than January 22, 2008. For additional information, please contact:
Mr. John Koon, Project Manager, (206) 296-8062, or by mail:
John Koon, Dept. of Natural Resources, 201 S. Jackson St., Suite 600, Seattle, WA 98104.
For questions about the River Facilities Vegetation Management Program please contact John Koon, Project Manager - River and Floodplain Management Unit
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