This study was completed in March 2025.

For questions or more information, contact UDOT's Region 3 office at 801-227-8000, Monday - Friday 8 a.m. - 5 p.m.

STUDY COMPLETE

The Utah Department of Transportation (UDOT) conducted an Environmental Assessment (EA) consistent with the National Environmental Policy Act (NEPA) to evaluate widening I-15 between Payson and Rocky Ridge, and improving the I-15 and Main Street interchange in Santaquin. The EA considered current and future transportation needs while considering any potential impacts to the natural and built environments.

The EA, as amended, and the Finding of No Significant Impact (FONSI) has been approved and the project can proceed toward design and construction, when funding becomes available. All future phases of the project are dependent on funding.

View the FONSI and EA errata sheets here.

Responses to public and agency comments can be reviewed here.

Study Area Map

​The environmental review, consultation and other actions required by applicable federal environmental laws for this study 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 the Federal Highway Administration (FHWA) and UDOT.