Cedar River Corridor Plan WRIA8 Salmon Recovery Council September 18, 2014 John Engel, P.E. Supervising Engineer Nancy Faegenburg, Project Manager Cedar River
Today’s Presentation Overview of Cedar Corridor Plan Goals and desired outcomes Stakeholder involvement process Scope and Timeline for project
Cedar River Watershed Study Area: Landsburg to Lake Washington 22 River Miles
Flooding, Damages, Repairs Renton Airport/ Boeing Nov 1990 Renton Feb. 1996 Byers Bend, Jan. 2009 Belmondo Post 2009 Flood Belmondo post mitigation repair Emergency Repairs 2013
Why do a Corridor Plan? Multi-objective River and Floodplain Management Detailed look at the floodplain, the risks and opportunities, alternatives development and communication with the public and stakeholders. Clearly defined vision/ outcomes Prioritized capital project list. Evaluates public safety in project and strategy for implementation Flood project mitigation integrated with salmon recovery plans
Improvements in Available Data 2001 Air Photo 2000 Hillshade Model 2001 Elevation Model 100 year FEMA 2013 Air Photo 2013 Hillshade Model 2013 Elevation Model 2014 Inundation Model
Examples of Detailed Flood Risk Information Channel Migration Mapping – under development Inundation depths based on Lidar and HEC- RAS model LIDAR Data showing detailed topography
Active Channel Migration – History Belmondo Reach Groundwork for Process Based Restoration
Plan Development Existing Conditions Characterization Problem Identification and Prioritization Identify Opportunities and Potential Solutions Evaluate, Prioritize and Sequence End Products: Clearly defined outcomes for the corridor List of Recommended CIP’s to achieve outcomes Conceptual Designs and Cost Estimates Other Programmatic Actions to achieve outcomes
Project Funding, Partners & Participants KC FCD, Lead Agency, project funding Consultant team – technical and outreach assistance KC WRIA and Science Staff Partner Agencies (Cities and Tribes) Advisory Committee Community City of Renton SRF Board grant – input to Corr. Plan.
Advisory Committee Recommendations: Cities: Renton, Seattle Muckleshoot Indian Tribe Neighborhood Residents River Safety Council and other recreational interests WRIA 8, Cedar River Council Industry: Boeing Non-profits: Friends of the Cedar River, Forterra Agencies: Corps, WDFW, Ecology ,NOAA Fisheries, WDOT County Parks
Timeline and Opportunities for Input Preliminary Outreach to Partners and Community (Spring-Summer 2014) Consultant (August 2014) $550-600K Advisory Committee (kick-off in Sept 2014) Public Meetings (Fall 2014, Spring/Summer 2015, Fall 2015) Plan Completed (December 2015) FCD review and adoption (1Q 2016) Project Selection and Implementation (2016)
Summary of Outcomes Goal is to produce a comprehensive plan with a clear vision for long term flood protection. Integrates multiple objectives Prioritized set of CIP’s Developed with input from an Advisory Committee
Rainbow Bend Successful flood damage reduction and river restoration, King County Team with City of Seattle 1990 Flood
Early 2013
October 2013
Sockeye in new channel
Contact Information: John Engel, P.E., Supervising Engineer Nancy Faegenburg, Project Manager Water and Lands Resources Division Rivers and Floodplain Management Section – Cedar River 206 477-4685 john.engel@kingcounty.gov 206 477-4688 nancy.faegenburg@kingcounty.gov
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