Review Alternatives for Targhee Pass

ITD Releases Alternatives for Targhee Pass EA

Visit the Public Involvement page to view displays, information and alternatives from the August 30, 2017 public meeting.

A scoping report summarizing comments received will be available to the public on the project website this fall.

What's Next?

After the comment period, the agency will analyze the alternatives in more detail, refine them, and then report back to the public. The public information team will send out email updates and convene the Stakeholder Working Group during this time. If you would like to be added to our email list, please email

What has been done up to this point?

Since 2004, the Idaho Transportation Department (ITD) has engaged in an intense highway corridor planning effort for U.S. 20 from Chester to the Montana state line - Idaho's gateway to Yellowstone National Park.

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Targhee Pass Environmental Assessment

ITD is currently conducting an environmental assessment of the Targhee Pass segment of the corridor (U.S. 20 between its junction with Idaho 87 and the Montana state line.). ITD is evaluating risks, benefits, opportunities, and costs associated with reconstruction of Targhee Pass.

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Targhee Pass EA Process & Timeline

Early Summer
Study Initiation Incorporate Comments Public Meeting #2

Alternatives Workshop
Public Meeting #3

Present Draft Alternatives
Complete Impact Analysis Public Meeting #4

Present EA Document
Stakeholder Assessment

Public Scoping/ Comment Period (12/15/16-1/30/17)
Refine Purpose & Need

Evaluate Strategies for Reducing Wildlife Collisions & Maintaining Migration Corridors
Incorporate Comments

Develop Draft Alternatives
30-day Public Comment Period

Incorporate Comments & Refine Alternatives
Prepare Environmental Assessment (EA) Document 30-day Public Comment Period

Finalize EA

Prepare & Publicize Decision
Current status

It is ITD’s goal to provide a process that supports open and transparent public participation. While an aggressive schedule has been set to ensure roadway and safety needs are met in a timely fashion, we have allowed time in that schedule to accommodate effective stakeholder engagement throughout the study process.

Contact Us

Targhee Pass Study Team
(c/o The Langdon Group)
677 South Woodruff Avenue
Idaho Falls, ID 83401
(208) 220-5937