Snoqualmie Basin 2020 Work Program King County Flood Control - - PowerPoint PPT Presentation

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Snoqualmie Basin 2020 Work Program King County Flood Control - - PowerPoint PPT Presentation

Aug 22, 2022 214 likes •395 views

Snoqualmie Basin 2020 Work Program King County Flood Control District Advisory Committee Chase Barton, Supervising Engineer July 13, 2020 Department of Natural Resources and Parks Water and Land Resources Division River and Floodplain

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Snoqualmie Basin 2020 Work Program King County Flood Control District Advisory Committee

Chase Barton, Supervising Engineer

July 13, 2020

Department of Natural Resources and Parks Water and Land Resources Division River and Floodplain Management Section

Service provider to the King County Flood Control District

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Snoqualmie Basin 2020 Work Program

Snoqualmie Falls, February 2020

  • 2019-2020 Flood Season
  • Middle Fork Capital Investment

Strategy

  • Shake Mill Left/Right Bank

Revetment Repairs

  • Circle River Ranch Flood Risk

Reduction

  • South Fork and Middle Fork PL 84-99
  • Reinig Road Revetment Repair
  • Record Office Revetment Repair
  • Tolt Levees Level of Service Feasibility

Study

  • Tolt Sediment Management

Feasibility Study

  • Tolt River Rd NE Elevation
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2019-2020 Flood Season

Snoqualmie River – Looking south toward NE 124th St., February 2020

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2019-2020 Flood Season

Landslide on the Raging River, February 2020

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Middle Fork Snoqualmie River Capital Investment Strategy

Middle Fork Community Meeting February 2020

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Shake Mill Right & Left Bank Revetment Repair Projects

Left Bank Right Bank

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Shake Mill Left Bank Revetment Reconstruction

  • Construction was

completed in early October 2019, two weeks prior to the October 22nd flood.

  • Approximately 300 feet of

the new buried setback revetment is visible following bank erosion during 2019 - 2020 flood events.

Setback Revetment on the North Fork Snoqualmie River, February 2020

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Circle River Ranch Flood Risk Reduction

Project Vicinity Map

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South Fork and Middle Fork Snoqualmie River US Army Corps of Engineers PL 84- 99

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Reinig Road Revetment Repair

City of Snoqualmie Project S Sit ite

NORTH TH

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Record Office Revetment Repair

Aerial Photo of the Revetment Project Location

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Tolt River Level of Service Feasibility Study

Tolt River Levee System

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Tolt River Sediment Management Feasibility Study

Tolt River Gravel Bar

SR SR203 203 B Bridge

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Tolt River Road NE Road Elevation

Tolt River Flooding, January 2009 Tolt River Road NE Elevation Location Former San Souci Neighborhood

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Questions?

Chase Barton, Supervising Engineer 206-477-4854 Chase.barton@kingcounty.gov www.kingcounty.gov/rivers