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I-15 | Hamilton Fort | Rebuild

I-15 | Hamilton Fort | Rebuild

UDOT is adding a northbound climbing lane on I-15 between the Kanarraville Rest Stop and the South Cedar Interchange. This project is also improving the Hamilton Fort Interchange at Exit 51.

Overview

Upcoming Closure at Kanarraville Rest Area (Exit 44)

Sept. 14 – Sept. 23

The northbound Kanarraville Rest Area will be closed while crews widen I-15 and rebuild the on- and off-ramps. Truck parking, restrooms, and other services will be unavailable 
during the closure. 
The rest area is expected to reopen on Sept. 24.
To find out more about alternate truck parking locations visit the
UDOT Motor Carriers Website.

Map of I-15 through southern Utah showing a rest area closure at milepost 44. PIN 18224

Project Overview

The Utah Department of Transportation (UDOT) plans to construct a 13-mile-long northbound climbing lane on I-15 from the Kanarraville rest stop to the South Cedar Interchange, milepost 43 to 56. The project will widen I-15 through this area from two to three northbound lanes. The project will also reconstruct the northbound side of the Hamilton Fort interchange (Exit 51) with a roundabout constructed on the east side of I-15.

Construction is expected to require two construction seasons, beginning in Spring 2025 and ending in October 2026. Construction schedules are subject to change due to weather conditions and material availability.

To join our email list for project updates, visit the "Sign Up for Updates" tab.

Progress at Exit 51

At the Hamilton Fort Interchange (Exit 51), crews are nearing completion of the new bridge and have started excavation work for the new roundabout. 
They have built a temporary bypass ramp to allow traffic to access northbound I-15. The image below shows an aerial view of the newly paved bypass. The image was taken on August 27, 2026.

Drone image of the Exit 51 Interchange and newly paved bypass ramp onto NB I-15. PIN 18224

Schedule

Work Hours: 6 a.m. - 5 p.m.

Work Days: Monday through Friday

There may be intermittent one-lane closures on I-15 during nighttime work hours of 7 p.m.- 7 a.m.

Project Timeline

live
live

Construction

Construction began in Spring 2025. 

Traffic is shifted on northbound I-15 as crews build a third passing lane between mileposts 43 and 56. 

Earthwork is underway on the east side of I-15 near the Hamilton Fort Interchange as crews build a new roundabout. 

Crews are rebuilding the west side of the bridge at Hamilton Fort on northbound I-15. 

Schedules are subject to change due to weather conditions and material availability.

planned
planned

Project Completion

The project is anticipated to be completed in Late Fall 2026

complete
complete

Design

Project design was completed in Winter 2024.

Contact Information

To contact the public information team with questions or concerns:

Hotline: 435-254-3305

Email: i15hamiltonfort@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.