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. The issuance of the DPO initiated a public comment period extending from May 22 through August 22, 2019. The opportunity for the applicant to respond to issues raised in public comments closed on November 7, 2019. On July 2, 2020, the Department issued the Proposed Order and Notice of Contested Case. The Proposed Order includes changes from the May 22, 2019 DPO based on comments received from members of the public, the applicant, reviewing agencies, and the Energy Facility Siting Council (Council), based on the Council's review during the December 2019 and January 2020 Council meetings. 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).

As detailed in the Notice of Proposed Order, individuals that commented “on the record of the Draft Proposed Order Public Hearing" (i.e. written comments submitted between May 22, 2019 and August 22, 2019, or oral testimony provided at one of the June 2019 public hearings) may submit a petition for party status in the contested case proceeding related to issues of law or fact the individual believes not to have been adequately addressed in the Department's Proposed Order. The deadline to submit petitions for party status closed on August 27, 2020 at 5 p.m.

Petitions for party or limited party status for the contested case proceeding received by the Department and Hearing Officer are provided below on the project timeline.

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

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

Project Timeline

Additional Documents
Notice of Intent
Project Order
Preliminary Application Received
First Amended Project Order
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

Public Comments on Draft Proposed Order

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


​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