I-15 St. George Improved
I-15 St. George Improved
The Utah Department of Transportation (UDOT) has prepared an Environmental Assessment (EA), in accordance with the National Environmental Policy Act (NEPA), to determine the need for a new interchange on I-15 and 700 South, evaluate interchange alternatives, and identify environmental impacts. The process examined alternatives that would improve regional mobility in the St. George area, ensure safe travel on I-15, and support active transportation.
As of October 2023, UDOT has completed the EA process - having identified a Preferred Alterantive and released a Finding of No Significant Impact (FONSI). Both the FONSI and the environmental document, including a description of the Preferred Alternative for an interchange at I-15 and 700 South, are now available for review.
Finding of No Significant Impact (FONSI) | Environmental Assessment | Appendix A | Appendix B
A comprehensive report of the Public Hearing, including presentation materials, public comments and responses, is available for review.
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.
Next Steps
With the environmental findings complete, UDOT will now proceed to develop final design plans to construct an additional lane in each direction on I-15 between Exits 6 and 8. The design will include wider structures and some operational improvements. The first phase of construction is expected between 2024 and 2026.
UDOT is not expected to build the study's recommended single-point-urban-interchange (SPUI) at 700 South until a later phase due to fiscal constraints. Information regarding the planning of projects in the St. George Metropolitan Area in future phases can be best monitored by referencing the Dixie Metropolitan Planning Organization's Regional Transportation Plan.
EA Timeline
This EA began in April 2022 and evaluated environmental and community impacts and identified improvements to address current and future mobility needs.
As part of the environmental process, there was a total of three comment periods where the public was encouraged to provide feedback - during the Scoping Phase, during the Alternatives Development Phase, and in coordination with the Public Hearings when the EA was released.
Learn more about why UDOT is looking into a potential new I-15 interchange in St. George at 700 South in the video below.