News
July 12, 2026

Idaho Transportation Department Begins Railroad Bridge Demolition for I-15 Widening Project

Construction Owners Editorial Team

Highlights

  • ITD will begin demolishing an abandoned railroad bridge north of the Fort Hall Interchange on July 16.
  • Nighttime lane closures on Interstate 15 are expected to continue for four to five weeks.
  • The bridge removal supports the ongoing expansion of I-15 to three lanes in each direction.
  • Temporary ramp closures and detours will be implemented during demolition activities.

Nighttime bridge demolition work is set to begin along Interstate 15 in eastern Idaho as the Idaho Transportation Department (ITD) advances a highway widening project designed to increase roadway capacity. The bridge removal is a key construction phase supporting the expansion of I-15 north of the Fort Hall Interchange.

Demolition Work Supports Highway Expansion

ITD will start removing an abandoned railroad bridge located north of Exit 80 on July 16, weather permitting. Demolition activities are scheduled to occur overnight between 7 p.m. and 6 a.m. and are expected to continue for approximately four to five weeks.

The bridge removal is necessary to allow construction crews to continue widening Interstate 15 from two lanes to three lanes in each direction through the project corridor.

Traffic Management During Construction

To accommodate demolition operations, traffic will periodically be shifted to one side of the interstate while sections of the bridge are removed. Single-lane closures will be in place during nighttime work hours.

The northbound on-ramp and southbound off-ramp at the Fort Hall Interchange may also be temporarily closed overnight. During these closures, motorists will be detoured via the I-15 South Blackfoot Interchange at Exit 89.

ITD advises drivers to follow posted work zone signage and observe reduced speeds to protect both motorists and construction personnel.

Why It Matters

Bridge demolition and roadway widening projects remain a critical component of transportation infrastructure investment aimed at improving highway capacity and traffic flow. For contractors, transportation agencies, and material suppliers, phased demolition work illustrates the importance of coordinating traffic management with construction operations to maintain safety while advancing major highway improvement projects.

Source: Idaho Transportation Department.

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