Project Overview

The Utah Department of Transportation (UDOT) has transitioned the I-15 Santaquin to Payson Improved project from the environmental phase into program delivery. 

This project aims to improve congestion and travel conditions on I-15 by adding an additional lane in each direction on I-15 between northern Juab County (milepost 238) and Payson (near the 800 South exit) and installing a new interchange on I-15 at Santaquin Main Street.

This project will also improve local road connectivity in Santaquin around the Main Street interchange and modernize existing bridges that cross I-15 in the project area.

The I-15 Santaquin to Payson Improved project is utilizing the Design-Build process, which leads to faster project delivery, greater flexibility and is a better value for state funds. See the “What is Design-Build?” tab for more on this process.

UDOT design is actively underway and construction is anticipated to begin as early as summer 2027. See the project timeline underneath the project map for more details.

Please visit the Impacts & Updates tab for up-to-date information on ongoing and upcoming work and/or closures.

Project Map

Map detailing the work area on I-15 from Exit 248 in Payson, extending south through Santaquin past exits 244 and 242, crossing into Juab County. PIN: 21601

Project Timeline

Project schedule timeline from 2026 through 2028. From 2026 to early 2027 is the UDOT design phase. In mid-2027 the contractor design phase begins. From late 2027 through 2028 is the construction phase. PIN 21601

Schedule

live
live

Active work

  • UDOT gathering data for 30% preliminary design

planned
planned

Future steps

  • Contractor selected: Anticipated spring 2027

 

  • Concurrent final design & construction: Anticipated summer 2027 to late 2028

complete
complete

Project milestones

Environmental assessment: Winter 2023-2025

  • Finalized environmental document in March 2025

  • Hosted fall 2024 public hearing and public comment period

    Contact Information

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