POCATELLO — Construction is officially underway on the Center Street Underpass project, marking a major step forward in long-planned improvements to one of downtown Pocatello’s most heavily traveled gateways.
Crews began work Friday on the underpass, which serves approximately 10,000 drivers each day. The project focuses on repairing and modernizing the structure with new retaining walls, enhanced safety features, and aesthetic upgrades designed to improve both function and appearance in the city’s historic downtown corridor.
Preparatory work for the project was largely completed in 2025, including waterline replacements, abutment preservation, and storm drainage installation. Progress paused in June, however, after the project underwent a comprehensive review and required additional approvals from Union Pacific Railroad.
With all necessary permits now secured, construction has resumed with excavation and shoring operations to support upcoming structural improvements. Planned upgrades include repaired abutments, new retaining walls, updated sidewalks, and refreshed fascia and portal features at the pedestrian tunnels.
The underpass, originally constructed in 1945, has been revised multiple times over the decades to address flooding concerns and improve durability. City officials say the current project represents one of the most comprehensive updates to the structure in years.
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Blackfoot-based Cannon Builders is leading construction efforts, working alongside Civil Science, a full-service civil engineering firm with offices in Idaho and Utah. According to a city news release, crews are installing soldier pile shoring along the southwest side of the underpass as part of the stabilization process.
Pedestrian access will remain open throughout construction via the north pedestrian tunnel, allowing continued foot traffic through the downtown area.
Public Works Director Tom Kirkman said the current phase of construction is focused on excavation and completion of one retaining wall. If progress remains on schedule, one traffic lane could reopen in approximately six weeks. Work will then shift to the adjacent retaining wall, requiring another temporary tunnel closure for about six weeks, with full completion expected in the fall.
“The City of Pocatello appreciates the patience and support of residents and local businesses as this exciting project moves forward,” the release said. “The city will continue to share updates as construction progresses.”
Residents seeking additional information are encouraged to contact the Public Works Department at 208-234-6189 or visit projects.pocatello.gov for ongoing updates.
Originally reported by Taylor S. Calder in Idaho State Journal.
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