At 8:19 a.m. the hoist slope car derailed and MSHA was notified at 8:39 a.m. No miners were on the car when this event took place. The car was put back on track and the rails were inspected with no findings. After several complete runs of the hoist slope car it was put back in service at 11:40 a.m. MSHA was notified at this time.