To mitigate potential rock fall and rock slope failure near I-70, Harrison Western installed an avalanche mitigation system on the Seven Sisters Slide Area near Loveland Ski Area. The new system consisted of remote-controlled propane and oxygen cannons that create a large blast above the avalanche slide area, thereby triggering a controlled avalanche. HW installed rock bolts, foundations, piping, and structures to house the exploders. Steep and rugged terrain neccessitated helicopters and pack llamas to mobilize the equipment and material to the work area.