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Construction at System Interchange Halfway Complete in Pocatello, Idaho

POCATELLO, ID — The historic rebuild of the System Interchange in Pocatello is nearing the halfway point, and motorists will continue to see progress in the coming year. Major milestones for the upcoming season include building five new bridges and demolishing one bridge. Bridges will be constructed to carry southbound traffic on Interstate 15, traffic over Chubbuck Road, and traffic heading east on Interstate 86 to access northbound I-15.

Next up for the project will be drilling concrete shafts for the foundations of the new southbound bridges on I-15. Each shaft will be 8 feet in diameter and drilled up to 60 feet deep to support the weight of I-15 passing overhead. Motorists will also notice construction of retaining walls for the new ramp from I-86 eastbound to I-15 northbound.

Originally built in the 1960s, the interchange is undergoing a $112 million redesign to improve safety and replace aging infrastructure. These safety improvements include:

  • Ramps will be redesigned to have drivers heading northbound on I-15 from I-86 merge from the right, rather than the left.
  • Traffic from Pocatello Creek Road will no longer have to cross three lanes to head to Chubbuck. Instead, drivers will travel under the northbound and southbound lanes of I-15.
  • Chubbuck Road will be transformed from an overpass into underpass. This means oversized vehicles will no longer have to detour off the interstate. Those who walk and bike will also be better able to travel from Chubbuck to the Portneuf Wellness Complex on the east side of the interstate.

Construction is slated for completion in 2025.

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