June 25, 2025
The Montana Department of Transportation (MDT) and Montana Materials & Construction are continuing scrub sealing on Interstate 15 (I-15) this week. Crews are moving into the city of Helena on I-15 and anticipate working in this section of the project for the remainder of the week.
As crews scrub seal through town, wait times to enter the interstate will increase as traffic backs up. Motorists should anticipate delays when using I-15 this week. Consider using an alternate route if possible.
What to expect during construction:
- Traffic will be reduced to one lane.
- Speed limits will be reduced.
- Motorcyclists should consider alternate routes.
- Fresh oil, loose chips, and fresh paint may be present in the work zone.
- Interchange ramps will be temporarily closed when a scrub seal is applied.
- Wide loads may be restricted at times.
June 20, 2025
The Montana Department of Transportation (MDT) and Montana Materials & Construction completed crack sealing on the Interstate 15 (I-15) bridges over Tenmile Creek and Sierra Road this week. Work to crack seal the bridges over Boulder Avenue is on hold and will take place at a later date.
Beginning the week of June 23, crews will apply a scrub seal to I-15 beginning at the Lincoln Road (Exit 200) interchange, moving south. Additionally, the work area will be broomed, and interim paint markings will be applied.
Currently it is anticipated that the northbound on-ramp and southbound off-ramp of Exit 200 will be closed for a 30- to 45-minute period during the afternoon of June 23. Those needing to enter or exit the interstate via these ramps at that time will need to detour south to the Custer Avenue Interchange (Exit 194).
What to expect during construction:
- Traffic will be reduced to one lane.
- Speed limits will be reduced.
- Motorcyclists should consider alternate routes.
- Fresh oil, loose chips, and fresh paint may be present in the work zone.
- Interchange ramps will be temporarily closed when a scrub seal is applied.
- Wide loads may be restricted at times.
June 13, 2025
The Montana Department of Transportation (MDT) and Montana Materials & Construction expect to begin construction the week of June 16 on a project to rehabilitate approximately 11 miles of Interstate 15 (I-15) near Helena. Construction is anticipated to be completed by August, weather and other unforeseen circumstances permitting.
When work begins, motorists can expect:
- Traffic will be reduced to one lane.
- Speed limits will be reduced.
- Motorcyclists should consider alternate routes.
- Interchange ramps will be temporarily closed when a seal and cover (scrub seal) is applied.
- Wide loads may be restricted at times.