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Large Wood Public Meeting June 10, 2014

Winkelman Revetment Reconstruction Project. Large Wood Public Meeting June 10, 2014 . Chase Barton, PE, LG, Project Manager River and Floodplain Management Section King County Water and Land Resources Division. Project Site Location. Project Site Details. Project Objectives.

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Large Wood Public Meeting June 10, 2014

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  1. Winkelman Revetment Reconstruction Project Large Wood Public Meeting June 10, 2014 Chase Barton, PE, LG, Project Manager River and Floodplain Management Section King County Water and Land Resources Division

  2. Project Site Location

  3. Project Site Details

  4. Project Objectives • Reconstruct the revetment to protect the City of Seattle’s Tolt River Water Supply Pipeline. • Minimize long-term maintenance needs and costs of flood hazard management associated with repeated repairs and the likelihood of emergency actions. • Provide riparian and aquatic habitat benefits to the extent practicable. • Limit impacts to agricultural land near the project site.

  5. Project Site Conditions Looking Upstream from floodplain surface

  6. Project Site Conditions Looking downstream from toe of bank during low flow conditions

  7. Potential Conditions Project Elements: • Toe: • Dolo/riprap toe • Lower Bank: • Pile supported bank roughening jam • Bank resloping • Upper Bank: • Live stakes • Coir encapsulated soil lifts • Bank resloping

  8. Potential Conditions Project Elements: • Toe/Lower bank: • Engineered logjams and pile supported bank roughening structures • Bank resloping • Upper Bank: • Live stakes • Coir encapsulated soil lifts • Bank resloping

  9. Recreational Use • Infrequent to moderate use by fisherman and motorized boats. • Access to project reach is limited. • Upstream access from Carnation • Downstream access from Duvall • Slow velocities in project reach. • Long sight lines to wood placement locations.

  10. Project Schedule • 30% plans available January/February 2015 • 60% plans available June 2015 • Permit applications to be submitted by June 2015 • 100% design complete December 2015 • Construction July 2016 – October 2016

  11. Questions? • Contact Information: Chase Barton email: chase.barton@kingcounty.gov phone: (206) 477-4854

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