Update 05/20/2018: The Montana Department of Transportation says it has reopened Interstate 15 in the area of culvert washout near Jefferson City.
Workers have completed a crossover that allows one lane each of north and south traffic in the area of the washout.
Officials say travelers through the area should expect reduced speeds while crews continue repairs.
Update 05/19/2018 (6:30 pm): The Montana Department of Transportation has RE-OPENED Interstate 15 at Jefferson City for SOUTHBOUND TRAFFIC ONLY. NORTHBOUND INTERSTATE 15 REMAINS CLOSED.
Please slow down in this area while crews continue to work to repair the northbound lanes. Travelers heading North will still need to take highway 287 from Three Forks or highway 12 from Garrison.
Update 05/19/2018: The Jefferson County Sheriff’s Office is urging travelers are urged to use established highway routes around the closure.
On their Facebook page, they say, “Butte to Helena travelers should use Highway 287 (Three Forks through Townsend) or Highway 12 (Deer Lodge to Garrison).”
Travelers should not use alternate routes they are unfamiliar with.
JEFFERSON CITY – The Jefferson County Sheriff’s Office posted on Facebook Friday evening:
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.