Environmental Study Complete

Based on the I-84 Mountain Green Interchange Environmental Assessment (EA), agency comments and public comments, UDOT has determined the EA’s Proposed Action will not have significant impacts on the natural or human environment. This decision is documented in a Finding of No Significant Impact (FONSI).

Next Steps

  • Final Design
  • Property Acquisition
  • Construction

​All future project phases depend on funding. To date, no funding has been allocated.

Overview

The I-84 Mountain Green Interchange EA was prepared in accordance with the National Environmental Policy Act (NEPA) to evaluate proposed transportation improvements on I-84 and SR-167 (Trappers Loop Road) in Mountain Green, Utah.

The EA's Proposed Action, or recommended transportation changes, include:

  • Adding a diamond, full access interchange (with on- and off-ramps in the eastbound and westbound directions) at I-84 that would tie into an extension of Trappers Loop Road between I-84 and SR-167/Old Highway Road.

  • Adding a four-way, signalized intersection with pedestrian phasing and crosswalks at SR-167/Old Highway Road.

  • Adding active transportation features on the Trappers Loop Road extension, including a 12-foot-wide shared-use path on the west side, which would connect with the existing shared-use trail on the north side of SR-167/Old Highway Road, and a six-foot-wide sidewalk on the east side. Also, the bridge span over Cottonwood Creek would allow for access to a future shared-use trail along the creek (if Morgan County chooses to build one).

  • Closing the I-84/SR-167 interchange (Exit 92) by removing the westbound on-ramp and eastbound off-ramp. UDOT chose to close the interchange to prevent the continued mixing of regional and local traffic on SR-167/Old Highway Road, which is neither intended nor suited to serve regional traffic.

UDOT made the EA available for review, hosted a public hearing about the EA, and provided a public comment period from April 4 to May 8, 2025.

The EA document and Public Hearing report are available at these links:

Map

 

The environmental review, consultation, and other actions required by applicable Federal environmental laws for this project are being or have been carried out by UDOT pursuant to 23 USC 327 and a Memorandum of Understanding dated May 26, 2022, and executed by FHWA and UDOT.