Keep your eyes open and stay alert around Underpass Avenue in Billings for a major construction project is underway on the water main replacement under Underpass Avenue.

The Montana Department of Transportation (MDT) construction project at the intersections of Underpass Avenue/State Avenue and 6th Street West/Central Avenue has begun.

Underpass Avenue South of State Avenue intersection now under construction.

Riverside Contracting, Inc. will begin work to reconstruct the intersections to enhance traffic operations and safety in the south-central Billings area.

The project incorporates new traffic signals, storm drain, lighting, improved pedestrian facilities, and upgraded signage to improve these intersections, promote accessibility, and enhance safety features.

6th Street underpass between stop lights (indicated by green on the map): While work occurs in the underpass, traffic is reduced to single-lane travel in each direction.

Underpass Avenue south of State Avenue intersection (indicated by orange on the map): The Underpass Avenue/Calhoun Lane intersection is closed while the team replaces the water main under the street. This closure is expected to take a few weeks. Please use Orchard Lane as an alternate route.

Laurel Road west of Underpass Avenue and State Avenue east of Underpass Avenue (indicated by yellow on the map): While the team replaces the water main under the street, traffic is reduced to single-lane travel in each direction.

The signals have been removed in the southern intersection. Temporary signals will be used for the next couple of months while the new intersection is built.

  • Water mains and storm drains are being replaced.
  • The shared-use path is being constructed.
  • Retaining walls are being constructed.

Concrete islands are being removed in the southern intersection.

“Please drive safely through the work zone – workers are regularly working alongside the roadway. Traffic barriers are placed for the safety of drivers and workers. As you travel through the active work zone, please slow down, pay attention to the road and other drivers, follow the posted speed limit, and be on the lookout for construction workers. Law enforcement is actively patrolling the corridor,” according to the MDT.