THE OPERATOR WAS DRIVING THE BULLDOZER PARALLEL TO A SOLID SLOPE. THE EQUIPMENT SLID APPROX. 4-5' TO AN 18-24"" DROP OFF. THE DOZER ROLLED OVER ON ITS SIDE. THE MINER WAS RELEASED TO WORK THE NEXT DAY. DOZER WAS INOPERABLE FOR 2 DAYS TO ALLOW FLUIDS TO RETURN TO NORMAL.