King County locally initiated SMP amendment

On Nov. 5, 2021, we approved King County’s locally-initiated amendment to its shoreline master program (SMP). Per RCW 90.58.090, the effective date of King County’s SMP is Nov. 19, 2021, 14 days after we provided notice to the county that their SMP was approved.


The county’s amendment results in several changes to their existing SMP. The changes pertain to the county’s Comprehensive Plan update (King County Codes 21A.24.310, 21A.24.316, 21A.24.325, and 21A.25.050), floodplain development regulations (King County Code 21A.24.070), and a technical date change in King County Code 20.12.200 to ensure the most recent ordinances are incorporated into the SMP. This submittal includes portions of three separate local actions:

  • Ordinance 19128 amends King County Code (KCC) floodplain code section 21A.24.070 in response to an audit by the Federal Emergency Management Agency and to meet federal and state minimum floodplain management standards (Code of Federal Regulations Title 44 and Revised Code of Washington Title 86).
  • Ordinance 19146 was adopted as part of the county’s comprehensive plan updates and includes minor revisions to critical areas codes, adds Lake Fenwick as a shoreline of the state, corrects where Kimball Creek becomes a water of the state and revises some of the mapped shoreline environmental designations. Mapping amendments are associated with King County Parks properties, Lake Washington/Newcastle, Vashon-Maury Island and Kimball Creek/Snoqualmie.
  • Ordinance 19244 amends KCC section 20.12.200 to make a technical date change to ensure the most recent ordinances (19128 and 19146) are incorporated into the SMP.

We used email to notify interested parties of the public comment period. We received comments from three organizations. Comments primarily focused on elements of ordinance 19128 that are not incorporated into the SMP including how the flood protection elevation applies to agricultural structures, the floodplain development permit process, agricultural wells in the floodway, where the FEMA floodway occurs, and questions pertaining to how the FEMA floodway is identified. On June 24, 2021, we sent a summary of comments to the county for their response. The public comments and county’s responses have been summarized in Attachment A Findings and Conclusions (below).

Documents for public review and comment

Appeals