West Trail Living Shoreline Project Progress Update San Mateo - - PowerPoint PPT Presentation

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West Trail Living Shoreline Project Progress Update San Mateo - - PowerPoint PPT Presentation

Aug 05, 2023 380 likes •653 views

West Trail Living Shoreline Project Progress Update San Mateo County Harbor District Board of Harbor Commissioners Meeting August 2020 Progress Data Concept Engineering Permitting Construction Collection Design (Fall / Winter 2020)

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West Trail Living Shoreline Project Progress Update

San Mateo County Harbor District Board of Harbor Commissioners Meeting August 2020

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Progress Permitting Engineering Concept Design Data Collection Construction

DRAFT FINAL PLANS, SPECS & ESTIMATE (August 2020) SUBMITTED (July 2020) (Fall / Winter 2020)

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Shoreline Protection – Design Goals

  • Protect trail from chronic erosion
  • Use nature-based techniques, minimize hardscape
  • Accommodate sea level rise
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Stormwater Improvements – Design Goals

  • Improve aesthetics and function
  • Water quality and ecological enhancements
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SHORELINE PROTECTION

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(Photo: SMCHD 2020)

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LIVING SHORELINE & TRAIL – PLAN VIEW

Rock Fingers Dune Beach Cobble Berm

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LIVING SHORELINE & TRAIL – TYPICAL SECTION

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Surfer’s Point, Ventura, CA

March 2016 November 2017

Mixed Sand / Cobble Beach Analog

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SAND SOURCES Need = 7,000 CY Sources:

  • Overwash Shoal – 5,400 CY
  • Airport Stockpile – 1,600 CY
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ROCK SOURCES

  • 1-4” Rock - Need 4,500 CY
  • 4-10 Ton Rock – Need 500

CY Source: Re-use and Quarry

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STORMWATER IMPROVEMENTS

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Drainage Basin Remove Existing Outfall Improve Ex. Stormdrain Bury Pipe

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Rock-lined Channel Check Dam

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Construction Schedule

SMCHD Board of Harbor Commissioners Meeting

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Construction & Monitoring – Anticipated Costs Hard costs:

  • ~$2.0M with 20% Contingency
  • Native Planting & Maintenance

Soft costs:

  • Restoration plan
  • Construction management
  • Biological monitoring
  • Eelgrass
  • Listed species
  • Physical monitoring
  • Renourishment?
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CONSTRUCTION DETAILS

  • Import of Sand & Gravel
  • West Point Parking Lot
  • Night work requested to

Minimize Impacts

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Grants & Permitting

SMCHD Board of Harbor Commissioners Meeting

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Grant Funding Investigations

  • Grant opportunities were researched and explored throughout Project planning.
  • National Fish and Wildlife Foundation Grant applied for, late 2019.
  • Honda Foundation Grant.

SMCHD Board of Harbor Commissioners Meeting

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Permitting and Agency Consultation

Multiple Permits Required:

  • U.S. Army Corps of Engineers—Individual Permit CWA Section 404; RHA

Section 10.

  • Regional Water Quality Control Board—Section 401 Water Quality

Certification/Waste Discharge Requirement.

  • Coastal Commission/County—Consolidated Coastal Development Permit.

Consultations: U.S. EPA; NOAA Fisheries (NMFS); Cal Department of Fish and Wildlife

SMCHD Board of Harbor Commissioners Meeting

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Permitting and Environmental Approvals

  • CEQA Draft MND - Public comment thru August 21
  • Permitting
  • Applications submitted in July 2020, currently under review by

agencies.

  • Anticipate permits by Fall 2020.
  • Monitoring and reporting required during and after construction.

SMCHD Board of Harbor Commissioners Meeting

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Next Steps

  • Bidding Process – 40 days (October 2020)
  • CEQA & Permits (Fall 2020)
  • Mobilization – 14 days (November 2020)
  • Construction – 120 days (March 2021

completion)

  • Dune and Biofiltration planting (Spring 2021)

SMCHD Board of Harbor Commissioners Meeting

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