THIS ICIDENT OCCURRED WHILE THE EE WAS HAULING SILT. WHILE PROCEEDING UP A RAMP, THE SURFACE OF WHICH IS A 6""STONE SUBASE WITH SILT & FINES, THE LOAD SHIFTED & THE PASSENGER SIDE FRONT TIRE LIFTED. REALIZING THAT HE WOULD NEED A DIFFERENTANGLE TO NEGOTIATE THE TURN AT THE TOP OF THE RAMP, THE DRIVER CHOSE TO BACK THE TRK DOWN THE RAMP WHILE THE TRK WAS BEING BACKED DOWN THE RAMP