I-15 | New Harmony to Kolob Canyon Drive | Rebuild
I-15 | New Harmony to Kolob Canyon Drive | Rebuild
UDOT will construct a 5-mile-long passing lane on Southbound I-15 from the New Harmony Interchange to Ash Creek Reservoir, milepost 38-43. Construction will take place Spring 2026 through Fall 2027.UDOT will construct a 5-mile-long passing lane on Southbound I-15 from the New Harmony Interchange to Ash Creek Reservoir, milepost 38-43. Construction will take place Spring 2026 through Fall 2027.
Project Overview
The Utah Department of Transportation (UDOT) plans to construct a 5-mile-long passing lane on southbound I-15 from the New Harmony Interchange to Ash Creek Reservoir, milepost 43 to 38.
This project will widen southbound I-15 from two to three lanes and replace the bridges at the New Harmony Interchange (Exit 42) and Kolob Canyon Interchange (Exit 40). Construction is anticipated to begin in Spring 2026.
To sign up for email updates, email the project team at i15newharmony@utah.gov and enter "Project Updates" in the subject line.
Project Map
Contact Information
To contact the public information team with questions or concerns:
Hotline: 435-254-3305
Email: i15newharmony@utah.gov
Stay Informed
To receive project updates, please contact the public information team at the email address above and enter "Project Updates" in the subject line.