To view the application visit the Horse Heaven Application webpage

To view SEPA documents (like the Draft EIS) visit the Horse Heaven SEPA page

Project background:

On February 8, 2021 EFSEC received an Application for a Site Certification (ASC) from Horse Heaven Wind Farm, LLC proposing the construction and operation of the Horse Heaven Wind Farm project. The ASC proposes the construction of a renewable energy generation facility that would have a nameplate energy generating capacity of up to 1,150 megawatts (MWs) for a combination of wind and solar facilities as well as battery energy storage systems (BESS). The proposed project is located in Benton County, Washington. According to the ASC, if approved, the Applicant is anticipating commercial operation of the first Phase to be built by the end of calendar year (CY) 2023.

The Applicant is seeking permitting authorization for up to 244 turbine locations and two solar arrays with their capacity dependent on the approved location, technology, and power market interest.

The Facility will utilize wind turbines and solar photovoltaic (PV) panels to convert energy from the wind and sun into electric power which is then delivered to the electric power grid. Two battery energy storage systems are proposed that would have a storage capacity of up to 300 MWac (megawatt capacity) using lithium-ion batteries.

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Comments Received

Comments received for the Horse Heaven Wind Project are categorized below and updated as soon as can become available.

Comments outside of a comment period can be sent to the EFSEC general mailbox at any time: EFSEC@utc.wa.gov

Important Note: Public comments submitted to the Council via the internet or in writing become public records under the Washington State Public Records Act (RCW 42.17). Information included in the comment such as the commenter's e-mail and mailing address becomes a public record once it is provided to EFSEC and may be subject to public inspection and copying if not protected by federal or state law. For additional information please see our Privacy Notice.

Draft EIS comments can be found on the Horse Heaven SEPA page

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Applicant: Horse Heaven Wind Farm, LLC. 5775 Flatiron Parkway, Suite 120 Boulder, CO 80301

Location: Benton County