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Oregon Department of Energy

Oregon Trail Solar Facility

The Oregon Trail Solar Facility is an approved energy generation facility to include any combination of wind and solar facility components not to exceed 41 MW, including up to 16 wind turbines or up to 400 acres of solar photovoltaic energy generation equipment within the approved 1,228 acre solar micrositing area. Facility components would be located within an approved 13,866 acre site boundary.

Approved/Under Construction. The certificate holder commenced construction of a portion of the facility, including a 20 MW battery energy storage facility on 6 acres, on August 30, 2025. The deadline to complete construction of all remaining facility components is August 30, 2028. ​

​Gilliam County, south of Arlington. PDF Map  | Online Map ​​

Applicant/Certificate holder: Oregon Trail Solar, LLC, a wholly owned subsidiary of Avangrid Power, LLC, the U.S. division of parent company Iberdrola, S.A.
ODOE contact: Kathleen Sloan
Applicant/Certificate holder contact: Kristen Goland
On September 25, 2020, the Energy Facility Siting Council approved Request for Amendment 5 of the Montague Wind Power Facility site certificate, which authorized allocation of previously approved facility components into an amended and two original site certificates for Montague Wind Power Facility , Montague Solar Facility and Oregon Trail Solar Facility, respectively. The documentation for the original project can be found on the Montague Wind Power Facility webpage.

Click here to view a diagram of the Site Certificate history.

Project Timeline

Milestone
  
Additional Documents
Display Date
  
Link
  
Name
  
Name
  
<div style='text-align:left !important'><a href='/energy/facilities/Facilities%20library/2020-09-25-OTS-Site-Certificate.pdf'>Site Certificate on Amendment 5 - OTS</a></div>
10/06/2020/energy/facilities/Facilities%20library/2020-09-25-OTS-Site-Certificate.pdfSite Certificate on Amendment 5 - OTSSite Certificate on Amendment 5 - OTS
<div style='text-align:left !important'><a href='/energy/facilities/Facilities%20library/2022-12-19-OTSAMD1-Complete-RFA1.pdf'>Complete Request for Amendment 1 (RFA1)</a></div>
12/19/2022/energy/facilities/Facilities%20library/2022-12-19-OTSAMD1-Complete-RFA1.pdfComplete Request for Amendment 1 (RFA1)Complete Request for Amendment 1 (RFA1)
<div style='text-align:left !important'><a href='/energy/facilities/Facilities%20library/2023-03-24-OTS-Final-Order-on-AMD1.pdf'>Final Order on Amendment 1</a></div>

Attachments A-G​

03/24/2023/energy/facilities/Facilities%20library/2023-03-24-OTS-Final-Order-on-AMD1.pdfFinal Order on Amendment 1Final Order on Amendment 1
<div style='text-align:left !important'><a href='/energy/facilities/Facilities%20library/2023-03-24-OTS-AMD1-Amended-Site-Certificate.pdf'>Site Certificate on Amendment 1</a></div>
03/24/2023/energy/facilities/Facilities%20library/2023-03-24-OTS-AMD1-Amended-Site-Certificate.pdfSite Certificate on Amendment 1Site Certificate on Amendment 1



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