[Sunday, May 20th, 8:45pm] I-15 Road Closure Update #7: INTERSTATE 15 AT JEFFERSON CITY NORTHBOUND HAS BEEN RE-OPENED. I-15 IS NOW OPEN IN BOTH DIRECTIONS. Traffic is reduced to one lane both north and southbound around the culvert washout. Speeds will be substantially reduced and motorists are urged to use EXTREME CAUTION in the construction zone.
[Friday, May 18th, 8:37pm] INTERSTATE 15 HAS BEEN CLOSED BOTH NORTH AND SOUTH BOUND AT AROUND MILE MARKER 175 JUST SOUTH OF JEFFERSON CITY DUE TO A CULVERT WASHOUT UNDER THE INTERSTATE. The Montana Department of Transportation is on scene and assessing the situation. We will update this page when more information is available. Please DO NOT travel to the area to view the damage, as emergency responders and transportation officials are working to resolve the issue as safely and quickly as possible.
[10:30pm] UPDATE: The Jefferson County Sheriff's office does not recommend using unfamiliar alternate routes around this closure. Main highway alternate routes include travel through Three Forks or Deer Lodge. The Montana Department of Transportation is continuing to work on the problem, and updates can be found using the MDT App, or online at: roadreport.mdt.mt.gov/travinfomobile/
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