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2015 Rating YellowPie chart showing Flood Safety in King County Performance Key

About this measure: This measure describes flood hazard risks reductions completed by the King County flood protection program in 2015.

2015 target: fully implement the 2015 flood protection program

2015 program results:

Flood damage repairs and levee rehabilitation projects — Flood damage repairs and levee rehabilitation projects were implemented at:

40% Achievement:

  • Rivers currently has four baselined projects: Countyline Levee Setback, Sinnema Quaale Repair, Black River Pump Station Sediment Removal, and the Tolt Pipeline Revetment Repair;
  • The Countyline project is behind schedule due to protracted land acquisitions resulting in condemnations;
  • The Tolt Pipeline Revetment Repair on schedule for construction in Q3 2015;
  • Partnered with the U.S. Army Corps of Engineers to complete flood damage repair at Desimone Levee Reach 1 along the Green River
  • Sinnema Quaale Upper Revetment along the Lower Snoqualmie River is behind schedule due to construction complications (revetment has been reconstructed; project will be completed in Q3 2016);
  • Black River – on schedule;

Acquisition and elevation of at-risk structures

  • 50 acres of floodplain were acquired at a cost of $6.1 million, providing permanent flood protection;
  • 19 residential structures were removed from the floodplain;
  • Nine home elevations were completed, and 12 are currently underway.

Agricultural flood mitigation

  • In the lower Snoqualmie valley, one farm pad was constructed.

2016 target: fully implement the 2016 flood protection program

Influencing Factors: The King County Flood Control District’s advances in flood protection were influenced by the participation, involvement and support of cities through the Basin Technical Committees and the Advisory Committee.

Strategy Going Forward: Planning work has been underway in multiple areas to characterize risks and recommend early action projects and capital investment strategies for the 6-year capital program. It is anticipated that the Flood Control District will determine whether additional multi-objective corridor planning is warranted during 2016.

  • For the Green River, the interim System-Wide Improvement Framework (SWIF) was completed and submitted to the U.S. Army Corps of Engineers in February 2016; the District has authorized a broader multi-objective river corridor planning effort for the Green River beginning in 2016.
  • For the River and Floodplain Management Section, a product catalog has been developed and specific metrics and milestones are now in development. It is anticipated that these metrics will be the basis for future more robust KingStat reporting.

Background: During 2007 King County took several significant steps to identify and respond to the flood hazards facing our communities. First, in January 2007, the King County Council adopted the 2006 Flood Hazard Management Plan, which included an evaluation of flood hazard vulnerabilities and an action plan of capital projects and programmatic activities intended to reduce flood risks throughout the County.

Following adoption of the Plan, the Council then authorized the formation of the King County Flood Control District (KCFCD) under RCW 86.15, including the voluntary establishment of an Advisory Committee of 15 elected officials to provide the KCFCD Board of Supervisors with expert policy advice on the District's work program priorities and budget. The Advisory Committee is supported by King County staff with input and recommendations from Basin Technical Committees comprised of public works and planning officials from cities throughout the County.

PugetSoundProposed Project Sites(Project locations areapproximate)0 12 Mi NSEATTLEBELLEVUE Tolt RiverSammamishRiverUpperSnoqualmieRiverSkykomishRiverIssaquahCreekCedarRiverGreenRiverWhiteRiverRagingRiverLowerSnoqualmieRiver
Water and land resources division capital improvement project locations
2005 - 2009
Download PDF versions: Cedar River, Green River, Issaquah Creek, Lower Snoqualmie River, Raging River, Tolt River, Sammamish River, Skykomish River, Upper Snoqualmie River and White River. .