2026 Yellowstone North Entrance Road Reconstruction Project FONSI

The National Park Service (NPS) prepared an Environmental Assessment in cooperation with the Federal Highway Administration to examine alternative actions and environmental impacts to reconstruct the North Entrance Road between Mammoth Hot Springs, Wyoming, and Gardiner, Montana. Four alternatives were analyzed in the EA: 1) The No Action alternative 2) The Center Alignment 3) The Old Gardiner Road (OGR) Alignment and 4) The Gardner Canyon Alignment. The NPS signed a Finding of No Significant Impact (FONSI) and decision document as well as an associated Wetlands/Floodplains Statement of Findings. The FONSI, approved by the NPS Regional Director, describes the selected action and establishes that there will be no significant impact on the environment. The preferred Alternative 2: Center Alignment, was selected.

Document Content:

2026 Yellowstone North Entrance Reconstruction Project FONSI.pdf   (46.2 MB, PDF file) Disclaimer: Links within the above document(s) were valid as of the date published. Note: Some of the files may be in PDF format and can be viewed using the Adobe Acrobat Reader software. You may download a free copy of from Adobe Systems.