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 (see below). 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. All of the comments received on the DPO and the applicant’s responses to many comments received on the DPO are provided below. These are very large documents.

Electronic copies of the ASC materials and the DPO may be downloaded or viewed at: Baker County Public Library, 2400 Resort St., Baker City; Oregon Trail Library District, 200 S. Main St., Boardman; Cook Memorial Library, 2006 4th St., La Grande; Pendleton Public Library, 502 S.W. Dorion Ave., Pendleton; Ontario Community Library Central, 388 SW 2nd Ave, Ontario; and the Oregon Department of Energy, 550 Capitol St. N.E., Salem.

The B2H project website provides useful information and is the main repository of documents and information regarding the federal NEPA review. The ODOE webpage you are on is considered the official source of current information regarding the EFSC review.

Idaho Power Company (applicant) may request EFSC approval of any combination of route segments for the proposed facility. All route segments must meet all applicable EFSC standards, rules, and ordinances. These route segments may or may not align with the route segments identified in the Record of Decision (ROD) issued by the BLM from the NEPA review. On non-federal land in Oregon, the proposed facility requires EFSC approval. On federal land, the proposed facility requires approval of both the responsible federal agency and EFSC.​

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

Applicant/Certificate holder: Idaho Power Company
ODOE contact: Kellen Tardaewether
Applicant/Certificate holder contact: Mark Stokes
​​​​ ​​​​​

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 Comments on Draft Proposed Order
​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