The Idaho Transportation Department (ITD) is making significant strides in the final stages of its $112 million renovation project at the Pocatello interchange for Interstate 86 and Interstate 15. This ambitious endeavor has seen the construction of eight new bridges, including two steel structures each spanning 414 feet and three concrete bridges totaling 387 feet. Additionally, substantial groundwork has been laid, with over 725 feet of concrete shafts and 10,000 feet of steel piles driven underground for bridge foundations. The project also boasts impressive statistics, such as 247,319 cubic yards of dirt moved, 143,500 tons of structural dirt imported, and 55,894 tons of asphalt placed. In the coming year, several critical tasks will be completed to finalize the project, including the construction of a new southbound-to-westbound ramp, removal of old ramps, and finishing the Chubbuck Road underpass.

Construction Milestones Achieved

This massive infrastructure project has achieved remarkable milestones over the past year. Eight new bridges have been erected, showcasing a mix of steel and concrete structures that enhance both durability and aesthetics. Extensive groundwork involved moving vast amounts of earth and importing structural materials to ensure solid foundations. Concrete pouring and asphalt placement have transformed the landscape, setting the stage for a modernized interchange system. The use of metal reinforcement has further strengthened the overall structure, ensuring long-term reliability.

One of the most striking achievements is the installation of 725 feet of 8-foot diameter concrete shafts and 10,000 feet of steel piles underground. These foundational elements provide the necessary support for the new bridges. The project has also seen the movement of an astounding 247,319 cubic yards of dirt and the importation of 143,500 tons of structural dirt. Over 4,000 cubic yards of concrete were poured, while 55,894 tons of asphalt were placed to pave the new roadways. The installation of 568,862 pounds of metal reinforcement underscores the commitment to building a robust and enduring infrastructure.

Finalizing the Modern Interchange

In the coming months, several key components will be completed to wrap up this historic project. The new southbound-to-westbound ramp will be finished, replacing temporary and outdated routes. Old ramps will be dismantled to streamline traffic flow, and the Chubbuck Road underpass will be finalized. Additional improvements include smoothing out bridge approaches and applying chip seals to extend the life of the new pavement. Restriping the lanes will ensure safe and efficient travel for motorists.

As the project enters its final phase, ITD remains committed to completing all remaining tasks by August. The new southbound-to-westbound ramp will eliminate the need for detours, improving convenience for travelers. Removing the old northbound-to-westbound ramp and the temporary southbound-to-westbound ramp will simplify navigation through the area. Constructing the roadway north of the Pocatello Creek on-ramp will allow direct access from Pocatello Creek to Chubbuck, enhancing connectivity. Smoothing out bridge approaches will remove construction-induced bumps, providing a smoother ride. Applying a chip seal will protect the new asphalt pavement, extending its lifespan. Restriping the lanes will ensure optimal traffic flow and safety. Motorists are encouraged to stay informed about project updates via ITD’s official channels to navigate safely through the construction zone.