This page shows the routes developed through the Community Advisory Process (CAP). Based on community feedback and input, Idaho Power selected a proposed route and alternate routes for the state and federal review processes. Visit the Maps page to view maps developed following the CAP.
Throughout the CAP Idaho Power worked with the communities to identify community criteria, develop a range of possible routes and recommend proposed and alternate routes. The maps shown below are categorized based on their mapping and/or analysis stage.
In June 2010, Idaho Power submitted the eastern route alternative as its proposed route in its revised right of way application (SF-299) to the Bureau of Land Management (BLM). Idaho Power also used this proposed route when it submitted the Notice of Intent to the Oregon Department of Energy (ODOE). The BLM and ODOE are proceeding with their separate application review processes. The proposed route and route alternatives are subject to change during the course of the state and federal review process.
Use the map below to review the proposed route.
The maps below are detailed segments of the proposed route and alternatives that Idaho Power submitted to the BLM and ODOE-EFSC.
Use the maps below to review the proposed and alternate routes.
|Map 1 of 70||Map 7 of 70||Map 60 of 70|
|Map 2 of 70||Map 55 of 70||Map 61 of 70|
|Map 3 of 70||Map 56 of 70||Map 62 of 70|
|Map 4 of 70||Map 57 of 70||Map 63 of 70|
|Map 5 of 70||Map 58 of 70||Map 64 of 70|
|Map 6 of 70||Map 59 of 70|
|Map 6 of 70||Map 12 of 70||Map 18 of 70|
|Map 7 of 70||Map 13 of 70||Map 61 of 70|
|Map 8 of 70||Map 14 of 70||Map 62 of 70|
|Map 9 of 70||Map 15 of 70||Map 63 of 70|
|Map 10 of 70||Map 16 of 70||Map 64 of 70|
|Map 11 of 70||Map 17 of 70|
|Map 18 of 70||Map 21 of 70||Map 24 of 70|
|Map 19 of 70||Map 22 of 70||Map 26 of 70|
|Map 20 of 70||Map 23 of 70|
|Map 26 of 70||Map 32 of 70||Map 65 of 70|
|Map 27 of 70||Map 33 of 70||Map 66 of 70|
|Map 28 of 70||Map 34 of 70||Map 67 of 70|
|Map 29 of 70||Map 35 of 70||Map 68 of 70|
|Map 30 of 70||Map 36 of 70||Map 69 of 70|
|Map 31 of 70||Map 37 of 70|
|Map 37 of 70||Map 43 of 70||Map 49 of 70|
|Map 38 of 70||Map 44 of 70||Map 50 of 70|
|Map 39 of 70||Map 45 of 70||Map 69 of 70|
|Map 40 of 70||Map 46 of 70||Map 70 of 70|
|Map 41 of 70||Map 47 of 70|
|Map 42 of 70||Map 48 of 70|
During the March 2010 Project Advisory Team (PAT) meetings, Idaho Power presented three route alternatives and requested PAT feedback. Section level maps of the three alternatives can be found below.
- Route Alternatives Overview
- Route Alternatives – Section Level Map 1
- Route Alternatives – Section Level Map 2
- Route Alternatives – Section Level Map 3
- Route Alternatives – Section Level Map 4
- Route Alternatives – Section Level Map 5
- Route Alternatives – Section Level Map 6
Following a preliminary evaluation, Idaho Power’s technical team revised the initial proposed routes to improve their potential permissibility. These revised routes are shown below.
|• Revised Routes Overview||• Revised Route 4|
|• Revised Route 1||• Revised Route 5|
|• Revised Route 1A||• Revised Route 6|
|• Revised Route 2|
|• Revised Route 3|
Revised Routes - Detailed Evaluation
Idaho Power’s technical team conducted a detailed analysis of each of the revised routes to further evaluate their potential permitability, constructability and mitigation costs.
The maps below show a summary of the permitting, constructability and mitigation cost analysis for the revised routes.
- Revised Routes – Permitting Analysis
- Revised Routes – Constructability Analysis
- Revised Routes – Mitigation Cost Analysis
Idaho Power divided the revised routes into 14 regions for detailed analysis.
- Revised Routes – Region Overview
- Constraints Crossed – Permitting Difficulty: This table shows all of the constraints crossed by the various revised routes and the level of permitting difficulty associated with each constraint.
Each revised route was analyzed based on:
- Permitting difficulty: The relative difficulty of obtaining necessary permits from federal, state and local governments.
- Construction difficulty: The relative difficulty associated with building the line in a given route. Considerations include terrain, road construction, equipment movement and tree removal.
- Mitigation cost: The relative cost associated with mitigation actions required by permitting authorities necessary to permit a route.
As part of the analysis, Idaho Power identified which routes are considered to be the most reasonable for each region.
Idaho Power also prepared a mileage summary table and data table for each region.
- The mileage summary table identifies the number of miles that have:
- Permitting difficulty (low, moderate, high and exclusion)
- Construction difficulty (low, moderate and high)
- Mitigation costs (low, moderate and high)
- The data table summarizes the number of miles of regulatory and community criteria that apply to the route. (In addition to regulatory criteria, Project Advisory Teams identified community criteria that they wanted considered when determining a route. The “Community Siting Criteria” is described below.)
The analysis results, including the mileage summary table and data table, are shown below for each of the 14 regions. Please note that some regions may be located in more than one PAT area.
|North PAT||Grant County PAT|
|• Boardman||• Blue Mountain|
|• Morgan – Ione||• Onion Creek|
|• Pilot Rock||• Southwest Region|
|• Umatilla National Forest|
|• West of National Forest Utility Corridor||Harney County PAT|
|• Southwest Region|
|• Blue Mountain||South PAT|
|• Burnt River||• Burnt River|
|• Interpretive Center||• Snake River Valley|
|• Lime||• Southwest Region|
|• Onion Creek||• West of Vale|
The initial proposed routes were developed by the PATs during mapping sessions held in fall 2009. Idaho Power’s technical team then evaluated each of the routes for potential permitability.
The PAT initial proposed routes map designates a number for each route. The route numbers are organized by the north, central and south areas.
- PAT Initial Proposed Routes Map (PDF, 1.9 MB)
The PAT initial proposed routes and preliminary evaluation criteria are shown below. Refer to the map index to locate the designated route number.
The PATs and the public identified community, natural, cultural and physical resources that should be considered by Idaho Power when siting the transmission line route. Idaho Power reviewed these resources and identified additional siting criteria. The siting criteria shown below were used in the development and analysis of the initial proposed routes.
- Community Siting Criteria - Opportunities and Constraints
- Community and Idaho Power Siting Criteria - Opportunities and Constraints*
*Community-identified resources are highlighted in blue.
This website is the joint Boardman to Hemingway Transmission Line Project site. Information contained on this site is approved for posting by Idaho Power. Visit the Idaho Power website.