Foothills Trail: King County

 

As a subconsultant to Huitt-Zollars, Facet provided environmental services for King County’s 1-mile extension of the Foothills Trail. The trail, entirely within shoreline jurisdiction, required a stream crossing and impacted multiple wetland buffers. Facet conducted environmental assessments, created a Critical Areas Report, and developed a stream crossing mitigation plan. The report detailed field findings, regulatory compliance considerations, and mitigation strategies.

Facet coordinated with agencies and tribes to address permitting constraints and phased the work to maximize efficiency during restrictive fish windows. Bridge repairs were completed during the 2017 fish window, while in-stream mitigation occurred the following summer. To mitigate erosion and improve in-stream habitat, Facet designed large woody debris structures and developed a planting plan to revegetate weed-dominated streambanks.

The team also prepared WSDOT standard specifications and construction plans for contractor bidding. Successfully obtained permits included compliance with King County Critical Areas, Shoreline Permit, Clean Water Act 401/404, Endangered Species Act, and National Historic Preservation Act requirements.

Location:

Enumclaw to Buckley, WA

Client:

King County Parks

Partner Firm:

Huitt-Zollars

Services Provided:

  • Environmental assessment, mitigation, engineering, and permitting

  • Construction support

  • Code research and regulatory guidance

  • Critical Areas Report, including:

    • Field findings

    • Regulatory and code compliance considerations

    • Stream crossing mitigation plan

  • Coordination with agencies and tribes regarding permitting constraints

  • Phased work to maximize efficiency during restrictive fish work windows

  • Design of in-stream habitat mitigation (large woody debris structures)

  • Development of a planting plan for streambank revegetation

  • Preparation of WSDOT standard specifications and construction plans for contractor bidding

 

As a subconsultant to Huitt-Zollars, Facet provided environmental assessments, permitting support, and mitigation design for King County’s Foothills Trail’s shoreline and stream crossing impacts.

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