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The Boardman to Hemingway Transmission Line is a proposed transmission line – primarily 500-kilovolt – that would extend approximately 300 miles from the proposed Longhorn Substation in Boardman, Oregon to the existing Hemingway Substation in southwestern Idaho.
Proposed. On September 28, 2018, the Oregon Department of Energy received the complete Application for Site Certificate (ASC) for the proposed facility. On May 22, 2019 the Department issued the Draft Proposed Order (DPO), recommending EFSC approval of the proposed facility. On July 2, 2020, the Department issued the Proposed Order and Notice of Contested Case. The Proposed Order included changes from the May 22, 2019 DPO based on comments on the DPO received from members of the public, the applicant, reviewing agencies, and the Energy Facility Siting Council (Council). All changes incorporated from the DPO to Proposed Order are presented in “red-line" format, to track the changes. The Proposed Order continues to recommend Council approve the ASC and grant a Site Certificate, subject to the conditions presented in the Proposed Order (and provided in list format in Attachment 1 of the Proposed Order). 

The deadline to submit petitions to participate in the contested case was August 27, 2020. The Hearing Officer managing the contested case proceeding issued the Second Case Management Order which identified parties, limited parties and issues in the contested case as well as the schedule for the contested case, this Case management Order is provided on the Timeline below. On May 31, 2022, the Hearing Officer issued its Proposed Contested Case Order. Parties and limited parties filed exceptions to the Proposed Contested Case Order on June 30, 2022 and Responses to exceptions were filed on July 15, 2022. Council reviewed the Proposed Contested Case Order, exceptions and response at its August 29-31 EFSC Meeting in La Grande, Oregon. The Transcript for each of the Hearings is available at the bottom of the Timeline below. Based on Council’s review and direction in regard to the above, the Department issued a draft Final Order on September 16, 2022. On September 13, 2022, the Department issued a Notice of a Hearing to Adopt Final Order under ORS 469.370(7) and a Material Change Hearing, which is scheduled at its September 27, 2022 EFSC meeting held in Salem, Oregon and remotely. The EFSC Meeting agenda with more details is provided on the EFSC Meetings webpage​.

The Decision and Administrative Project Record is available via One Drive (linked below on the Timeline), however, if you would like any documentation generated from the contested case proceeding, please contact the Department.

Morrow, Umatilla, Union, Baker, Malheur, Owyhee (Idaho) counties.

Applicant/Certificate holder: Idaho Power Company
ODOE contact: Kellen Tardaewether
Applicant/Certificate holder contact: Joe Stippel
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Project Timeline

Additional Documents
Notice of Intent
Amended Preliminary Application
Complete Application (Large files)
Contents of the Application

Exhibit B (Main)
Exhibit B (Attachments B1-B4)
Exhibit B (Attachments B5 Part 1)
Exhibit B (Attachments B5 Part 2)
Exhibit B (Attachments B6-B7a)
Exhibit B​ (Attachments B7b)
Exhibit H (Part 1)
Exhibit H (Part 2)
Exhibit I (Part 1)
Exhibit I (Part 2)
Exhibit J (Main Part 1)
Exhibit J​ (Main Part 2)
Exhib​it J (Main Part 3)
Exhibit J (JPA Part 1)
Exhibit J (JPA Part 2)
Exhibit J​ (JPA Part 3)
Exhibit J​ (JPA Part 4)
Exhibit J (Wetland Delineation Part 1)
Exhibit J​ (Wetland Delineation Part 2)
Exhibit J (Wetland Delineation Part 3)
Exhibit J (Wetland Delineation Part 4)
Exhibit J (Wetland Delineation Part 5) 
Exhibit J (Wetland Delineation Part 6)
Exhibit N (Part 1)
Exhibit N​ (Part 2)
Exhibit P1 (Part 1 Main to Attachment P1-6)
Exhibit P1 (Part 2a Attachment P1-7A)
Exhibit P1 (Part 2b Attachment P1-7A)
Exhibit P1 (Part 3 Attachment P1-7B)
Exhibit P1 (Part 4a Attachment P1-8)
Exhibit P1 (Part 4b Attachment P1-8)
Exhibit P1 (Part 5 Attachment P1-9)
Exhibit P2 (GRSG)
Exhibit P3 (Elk)
Additions to Complete Application
Public Notice on Draft Proposed Order
Draft Proposed Order

Idaho Power Company Response to Select Public Comments on the Draft Proposed Order
Public Comments on Draft Proposed Order

All Public Comments (external link to single OneDrive PDF file)

Index of Comments

Public Notice of Proposed Order and Contested Case

​Deadline to submit petitions for party status​ extended to August 27, 2020 (see below).

Proposed Order
August Meeting Transcripts for EFSC Review of PCCO and Exceptions
​​​​​Select Contested Case Files ​

  Federal Permitting Dashboard​ 
​Contact the Facility Siting Team:

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