Lower Snake River Wind Facility (343 MW)

Garfield County, Washington

The Lower Snake River Wind Facility is the largest wind facility in the state of Washington. It is located on 21,610 acres near the town of Pomeroy in Garfield County. With 149 turbines producing a generating capacity of 343 megawatts of electricity, the facility serves an estimated 100,000 households while simultaneously reducing greenhouse gas emissions by 571,500 tons each year. The project infrastructure includes 37 miles of site roads, five miles of public road improvements, 149 turbine sites, 64 miles of underground power collection lines, eight miles of overhead transmission lines, two project substations, and a grid interconnection substation.

DEA’s renewable energy team supported key elements of the project development, design, and construction stages:

  • GIS mapping support for permitting and construction activities.
  • Independent structural engineering review of the foundation design for the wind turbine generators.
  • On-call civil engineering design for roadway, site, and drainage design.
  • Temporary erosion and sediment control design.
  • Environmental compliance in support of the NPDES Construction Stormwater General Permit, including environmental monitoring of construction compliance with permit conditions, related mitigation requirements from the Garfield County SEPA EIS, and the subsequent Conditional Use Permit for the facility.
  • As-built geometric verification for road and turbine sites.

Project Awards

  • Engineering Excellence Bronze Award - ACEC Washington, 2013

Additional Services

Learn more about our other services and offerings:

Environmental and Regulatory Compliance