D3 Rockfall Mitigation (Final Phase)
The Montana Department of Transportation is pleased to announce that rockfall mitigation work in the Wolf Creek area on Interstate 15 has been completed. The Montana Department of Transportation and all crews working on site are grateful for the patience of travelers as this project took place throughout the summer. The multi-year effort to strengthen the slopes around Interstate 15 began in 2015 and was completed in early November 2018.
Work started south of Wolf Creek and moved through the Prickly Pear Canyon and as far north as Hardy Creek, strengthening the slopes surrounding the roadway through complex geological calculations.
Past Project Information
Anticipated workdays are Monday through Friday, with delays of up to 30 minutes possible from 8:00 a.m. to 4:00 p.m. Travelers are reminded to obey posted traffic rules and flagger direction in the work zone. Fines double in work zones. Please budget an additional 30 minutes into your commute when traveling in either direction.
Any load over 12 feet wide, including farm equipment, will be permitted Monday – Thursday from 5:00 p.m. – 7:00 p.m. Wide loads cannot be piloted through the work zone Friday through Sunday for the duration of the project. Work is scheduled for completion in October 2018, weather permitting.
Rockfall mitigation on the roadway will require single lane closures through the Prickly Pear Canyon. Traffic may occasionally be reduced to one lane and drivers may experience delays, detours and increased traffic. Work will be performed between mile markers 238 and 246 on Interstate 15 from April to June. From June through October, work will take place between mile markers 222 and 227. Using alternate routes when possible is recommended. For those wishing to recreate on the Little Prickly Pear Creek or Missouri River, access will not be impacted.
Phase three work will include slope scaling; installation of rock bolts and draped mesh and construction of rockfall attenuator fences and a flexible rockfall barrier. Improvements to the rock wall will allow loose rocks to be harmlessly guided to the ground and contained with the barrier, dramatically reducing impact of rockfall on roads and vehicles.
In addition, the project will include placement of concrete barrier rail and new guardrail as additional roadway measures to keep motorists safe. The overall goal of this project is to eliminate significant rockfall, creating a safer roadway and limiting costly roadway repair and maintenance.
Stay in the Know
For more information about Hi-Tech Rockfall Construction, visit their website.
Questions or concerns may be addressed to Dan Rivas, Project Manager for the Montana Department of Transportation, at 406-788-8753.
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