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U.S. 20 Corridor

A Safer Road.

Current Study: Targhee Pass Environmental Assessment (U.S. 20: Idaho 87 – Montana state line)

Study Information

Helpful Resources

Resource Links & Information

  • Targhee Pass Signed FONSI (Dec 2020)
  • Targhee Pass Final EA (June 2020)
  • Targhee Pass FONSI (June 2020)
  • EA Appendix A: Cost Benefit Memo
  • EA Appendix B: Noise Report
  • EA Appendix C: Index of Comments
  • EA Appendix D: Comments
  • EA Appendix E: Programmatic BA
  • EA Appendix F: No Effect Statements
  • Draft EA – All Comments
  • Visual Impact EA Technical Report
  • Wildlife EA Technical Report
  • Noise EA Technical Report
  • Targhee Pass EA References with Links
  • U.S. 20 Corridor Safety Report
  • U.S. 20 Safety Corridor Data
  • Traffic Assessment
  • Traffic Data Summary
  • Targhee Pass EA Scoping Report (PDF)
  • Targhee Pass Alternatives
  • ITD & IDFG Cooperative Agreement_2017 (PDF)
  • Targhee Pass Study Map (PDF)
  • Regional Elk Migration/Freight Map (PDF)
  • ITD/IDFG Memorandum of Understanding (PDF)
  • Wildlife Report (Dr. Patty Cramer)
  • Idaho Department of Fish and Game Strategic Plan (PDF)
  • NEPA and Project Development (FHWA)

Contact Us

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

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