Snake River Avenue in Lewiston to fully close for pipeline work

Detours in place as crews address unstable soil conditions during sewer main rehabilitation project

Mar. 23, 2026 at 2:54am

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The City of Lewiston has announced a full closure of Snake River Avenue starting Monday, March 23, as crews continue work on the city's 2026 Pipeline Replacement Project. The closure, which is expected to last through Friday, March 27, will stretch from the Southway Bridge to the Southway Avenue roundabout due to unstable soil conditions encountered during the rehabilitation of a sanitary sewer main.

Why it matters

This closure will impact traffic flow and commute times in the area, requiring drivers to use detour routes along Bryden Canyon Road, Southway Avenue, and 8th Street. The project is part of the city's broader efforts to upgrade its aging infrastructure, though the unstable soil conditions have created safety concerns that necessitated the expanded work zone.

The details

According to city officials, the expanded closure comes after crews encountered unstable soil conditions while working to rehabilitate a sanitary sewer main. The shifting soil has created safety concerns, prompting officials to widen the work zone and close both northbound and southbound lanes of Snake River Avenue. Drivers are advised to expect delays, allow extra travel time, and follow posted detour signs. Access to CCI Ammunition will remain open during the project.

  • The closure will begin on Monday, March 23, 2026.
  • The closure is expected to remain in place through Friday, March 27, 2026.

The players

City of Lewiston

The local government overseeing the pipeline replacement project and road closure in Lewiston, Idaho.

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What’s next

City officials noted that underground conditions may lead to minor schedule adjustments as work continues.

The takeaway

This road closure highlights the ongoing infrastructure challenges faced by cities like Lewiston, where aging pipelines and unstable soil conditions require extensive rehabilitation work that can significantly impact local traffic patterns and commute times.