Perennial Wind Chaser Station is approved to be a natural gas facility comprised of up to four turbines with a maximum capacity of 415 megawatts.
Under Review/Approved. The facility has not yet been built. In accordance with the existing site certificate, construction must begin three years after the effective date of the site certificate (that is, before September 23, 2018) and construction must be completed by September 23, 2021. On August 2, 2018 the Department received a preliminary request for amendment (pRFA), through which the certificate holder requests to extend each of the construction deadlines. In its pRFA, the certificate holder included a Type B review amendment determination request (ADR) and requested Department consideration of the Type B amendment review path based on the information included in pRFA. On August 22, 2018, the Department issued its determination that Type A review is the appropriate review process for the pRFA. The Department determined on June 21, 2019 that the pRFA is complete. The complete request for amendment (RFA) is available for review below.

The Department issued the Draft Proposed Order on Amendment 1 on July 8, 2019. EFSC held a public hearing on the Draft Proposed Order (DPO) on August 22 in Boardman. The comment period closed at the conclusion of the public hearing on August 22. The audio for the August 22 Council meeting – including the public hearing – is available on the
Council meetings webpage.

Written comments received on the DPO]

Department issued the Proposed Order and Notice of Proposed Order on October 2, 2019, which are available for review below. On the same day, ODOE issued a Notice of the Opportunity to Request a Contested Case to all persons who commented on the record of the public hearing of the DPO and provided their contact information. Only those individuals or organizations that provided oral comment at the August 22, 2019 public hearing on the DPO or submitted a written comment to ODOE during the comment period of the DPO between July 8, 2019 and the close of the public comment period on August 22, 2019 are eligible to request a contested case proceeding on the Proposed Order.
Western Umatilla County, on approximately 20 acres adjacent to the existing Hermiston Generating Plant. PDF Map | Online Map
Applicant/Certificate holder: Perennial-WindChaser LLC, a wholly-owned subsidiary of Perennial Power Holdings, Inc., which is a wholly-owned subsidiary of Sumitomo Corporation and Sumitomo Corporation of America.
ODOE contact: Katie Clifford
Applicant/Certificate holder contact: JJ Jamieson

Project Amendment(s)


Project Timeline

Additional Documents
Preliminary Application Received
Complete Application
​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