Contacted at home that power had gone out. Only 2 men underground. Both EE's at primary escapeway and accounted for. Left message at MSHA Boise office. Power restrored at 1:00am. Power out again at 2:10 am. No EE's underground. Decision made to cancel dayshift. Power restored at 7:30am. MSHA Boise office called and they were given an update.