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The Boardman to Hemingway Transmission Line is an approved facility that includes an approximate 300 mile (275 miles in Oregon) electrical transmission line (primarily 500 kilovolt (kV)) that crosses five counties in Oregon, Morrow, Umatilla, Union, Baker, and Malheur counties. Approved related or supporting facilities include the Longhorn Substation in Boardman, Oregon, communication stations, access roads, pulling and tensioning sites and construction laydown areas.

Approved. On September 27, 2022, Council approved the ASC. The approved but not yet constructed facility has a construction commencement deadline of October 6, 2026.

On December 7, 2022, the Department received preliminary Request for Amendment 1 (pRFA1) from the certificate holder. The pRFA1 seeks Council approval for the following:

  1. re-location of the transmission line on three properties based on IPC's coordination and agreement with the affected landowners; and
  2. refinement of the location of certain roads resulting from additional design and engineering review. This includes approximately 7.2 miles of 500-kV transmission line alternatives, and 33.8 miles of access road changes associated with the approved route. The proposed site boundary additions cover 952.5 acres.

Following review and completeness determination of pRFA1, the Department will issue a Draft Proposed Order and Notice of Draft Proposed Order, initiating a public comment period on both the amendment request and Draft Proposed Order. These materials will be posted to the project webpage below upon issuance.

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 Amendment(s)

Preliminary Request for Amendment 1 (pRFA1)


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
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​

B2H Record and Selected Contested Case Files​ (One Drive)​

  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