Due to public health concerns related to the spread of the novel corona virus (COVID-19), the Energy Facility Site Evaluation Council office (EFSEC) is closed to the public as of March 16, 2020. All EFSEC staff are telecommuting until further notice and EFSEC operations will continue remotely. You may reach EFSEC by phone (360) 664-1345 or by email efsec@utc.wa.gov during regular business hours, 8 am – 5 pm, Monday through Friday. EFSEC Council meetings will be held by teleconference until further notice. Please check this site regularly for updates.

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Badger Mountain

Aurora Solar, LLC (Applicant), a wholly owned subsidiary of Avangrid Renewables, LLC, proposes to construct and operate the Badger Mountain Solar Energy Project (Project). The Project is a 200-megawatt (MW) solar photovoltaic (PV) generation facility with an optional 200-MW battery energy storage system (BESS) located in unincorporated Douglas County (County), Washington. The Project is generally located approximately 3.5 miles east of the East Wenatchee city limit boundary and south of Badger Mountain Road.

The Project will use solar modules configured in a solar array to convert energy from the sun into electric power. The solar modules are mounted on a tracker system supported by steel posts and will be connected in a series to form rows, which are in turn connected to form the solar array. The solar array will consist of the solar modules, tracker system, posts, cabling, inverters, transformers, and electrical collector lines. The solar array inverters are paired with medium voltage step-up transformers used to convert the generated electricity from direct current (DC) to alternating current (AC) and increase the voltage for distribution.

The Project’s Commercial Operations Date (COD) is planned for fourth quarter (Q4) 2024 and Project construction is anticipated to begin in Q1 2023.

Mailing list:

If you would like to be added to the project mailing list, please click here

NOTE: This link takes you to a UTC mailing list form that will directly add you to the Badger Mountain project mailing list. Please enter your email address and it will sign you up for this project mailing list.

Public Informational Meeting and Land Use Hearing, November 17, 2021 5 pm PST

Documents for the public Informational Meeting and Land Use Hearing are available below. 

You may join the meeting live using:

  • Microsoft Teams (free)
  • or by calling 1 (253) 372-2181 Conference ID: 553577166#

Please mute your microphone to help us reduce background noise. 

How to comment:

If you would like to sign up to speak please send an email to efsec@utc.wa.gov or call 360-664-1345.

If you would like to provide your comment in writing please visit https://comments.efsec.wa.gov/ (note: the comment campaigns will not appear until November 17th at 5pm.

Counsel for the Environment

Counsel for the Environment Correspondence


Certificate holder: Avangrid Renewables, LLC
1125 NW Couch Street
Portland, OR 97209

Facility: 200-megawatt (MW) solar photovoltaic (PV) generation facility