EE WAS OPERATING A REFUSE HAULER ON THE IMPOUNDMENT AREA. AFTER HAVING DUMPED A LOAD OF REFUSE, HE WAS LEAVING THE FILL AREA ON AN UPHILL GRADE WITH THE BED RAISED FOR TRACTION. AS HE TOPPED T HE GRADE, THE HAULER JARRED HIM, JERKING HIM TO ONE SIDE & STRAINING HIS RIGHT SIDE. LOST TIME BEGAN 1/25/01.