Mine lost power 8/23-9:35 AM. Compromises two ways out. Employees stopped work, assembled in lunch room. Problem with KCPL-no info on duration of outage. Evacuation ordered 9:40 using backup power supply, called MSHA. Evacuation recorded 9:40. 9:47-employees out of mine and accounted for. Phoned MSHA later in day-employees sent home, will be back 8/24-6:00 AM shift.