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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 1,228 acres of solar photovoltaic energy generation equipment. Facility components would be located within an approved 13,866 acre site boundary.

Approved/Under Review: Construction of the facility must commence on or before August 30, 2022. 

On August 19, 2022, the Department received preliminary Request for Amendment 1 (pRFA1) for the Oregon Trail Solar Facility, seeking Council approval for a three-year extension to the construction commencement deadline (identified in Condition 24), and a revision to condition 50(b) related to cultural resource monitoring.

On December 23, 2022 the Department issued its Draft Proposed Order on RFA1 recommending approval of the certificate holder's amendment request  and issued a Notice of Complete RFA1, Draft Proposed Order, and Public Hearing. The comment period extended through January 19, 2023, until 7:00 PM PST, at the close of the Public Hearing. EFSC reviewed the Draft Proposed Order at the January 20, 2023 EFSC meeting held in Condon, Oregon.

On January 25, 2023, the Department issued the Proposed Order on RFA1 and a Public Notice on the Proposed Order and Opportunity to Request a Contested Case. These documents are available via links in the timeline below. The deadline to request a contested case is February 24, 2023 at 5:00 PM PST.

ODOE has an online portal for submitting comments. The goal of the online comment portal is to provide members of the public with another convenient option to submit input on projects, and to provide additional resources that will enable meaningful participation in the Site Certificate approval process.

The portal can be accessed here.

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

Applicant/Certificate holder: Oregon Trail Solar, LLC, a wholly owned subsidiary of Avangrid Renewables, LLC, the U.S. division of parent company Iberdrola, S.A.
ODOE contact: Kathleen Sloan
Applicant/Certificate holder contact: Matthew Hutchinson

​​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 Amendment(s)



Deadline to Submit Written Comments
Public Hearing on Draft Proposed Order
Deadline to Request a Contested Case

5:00 PM PST


Project Timeline

Additional Documents



​Contact the Facility Siting Team:


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Exhibit Files Reference

  • Exhibit A: Applicant Information 
  • Exhibit B: Project Description
  • Exhibit C: Property Location and Maps
  • Exhibit D: Organizational Information
  • Exhibit E​: Permits Required
  • Exhibit F: Property Ownership 
  • Exhibit G: Materials Analysis
  • Exhibit H: Geology and Soil Stability 
  • Exhibit I: Soils
  • Exhibit J: Wetlands
  • Exhibit K: Land Use
  • Exhibit L: Protected Areas
  • Exhibit M: Financial Analysis
  • Exhibit N​: Non-generating Facility Information
  • Exhibit O: Water Requirements
  • Exhibit P: Fish Wildlife Habitat 
  • Exhibit Q: Threatened and Endangered Plants and Animals
  • Exhibit R: Scenic Aesthetic Values 
  • Exhibit S: Cultural Resources
  • Exhibit T: Recreational Facilities 
  • Exhibit U: Public Services
  • Exhibit V​: Waste Minimization 
  • Exhibit W: Site Restoration
  • Exhibit X: Noise 
  • Exhibit Y: Carbon Dioxide Emissions 
  • Exhibit Z: Cooling Towers  
  • Exhibit AA: EMFs – Electric and Magnetic Fields
  • Exhibit BB: Other Information
  • Exhibit CC: Additional Statutes Rules Ordinances
  • Exhibit DD​: Other Specific Standards