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The Boardman to Hemingway Transmission Line is an approved primarily 500 kilovolt (kV) transmission line which includes an approved route and approved alternative routes. The approximately 272-mile transmission line crosses five counties in Oregon, Morrow, Umatilla, Union, Baker, and Malheur counties. The facility includes approved related or supporting facilities including the Longhorn Substation in Boardman, Oregon, communication stations, access roads, pulling and tensioning sites and construction laydown areas.

Approved. At its regularly scheduled EFSC Meeting On September 27, 2022, Council held a Hearing to Adopt Final Order under ORS 469.370(7) and a Material Change Hearing for the application for site certificate (ASC) for the facility, Council approved the ASC to a 6-0 vote. The EFSC Meeting recording 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
​​​​ ​​​​​

​**Updates to this page are currently in progress**​

Project Timeline

Additional Documents
Notice of Intent
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
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

August Meeting Transcripts for EFSC Review of PCCO and Exceptions
Attachments (large files)

Attachmen​t 1: Site Certificate​​
Attachment 2​: DPO Comment Index and DPO Comments (Opens in OneDrive)
Attachment 3: Applicant Responses to Select Public Comments on the Draft Proposed Order 
Attachment 4​: DPO Comment, Applicant Responses, Department Response in Proposed Order Crosswalk Tables
Attachment 5: Referenced Reviewing Agency Comment Letters and Documents Referenced 
Attachment 6​​: Contested Case Order (CCO), as Amended and Adopted by Council 
Attachment B-5: Road Classification Guide and Access Control Plan (No Maps)
Attachment B-5: Road Classification Guide and Access Control Plan 
(Maps Only)
Attachment BB-1: Plan for an Alternative Practice
Attachment BB-2: Fish Passage Plans and Designs
Attachment G-4: Draft Spill Prevention Control and Countermeasure Plan​
Attachment G-5: Draft Framework Blasting Plan
Attachment H-1: Proposed Site Specific Geotechnical Work 
Attachment H-2: ​Summary of Proposed Boring Locations
Attachment H-3: Seismic Tables and Maps
Attachment H-4: Landslide Inventory
Attachment I-3: 1200-C Permit Application and Erosion and Sediment Control Plan 
Attachment J-1: Draft Removal-Fill Compensatory Wetland Non-Wetland Mitigation Plan 
Attachment J-2: Draft Removal-Fill Temp Impacts Draft Site Rehabilitation Plan
Attachment J-3: Removal Fill Permit Conditions
Attachment K-1: Agricultural Lands Assessment
Attachment K-2: Right of Way Clearing Assessment 
Attachment P1-3: Draft Reclamation and Revegetation Plan
Attachment P1-4: Draft Vegetation Management Plan
Attachment P1-5​: Draft Noxious Weed Plan 
Attachment P1-6: Draft Fish and Wildlife Habitat Mitigation Plan 
Attachment P1-9: Avian Protection Plan
Attachment P2-3: Greater Sage-Grouse Habitat Mitigation Plan
Attachment S-9: ​Draft Historic Properties Management Plan (Inadvertent Discovery Plan) 
Attachment U-2: Draft Transportation and Traffic Plan
Attachment U-3: Draft Fire Prevention and Suppression Plan
Attachment W-1: Facilities Removal and Site Restoration Cost Estimate ​
Attachment X-4: Noise Analysis Results by NSR Location
Attachment X-5: Maps - All NSRs and NSR Exceedances​

​​​​​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