EMPLOYEE WAS INJURED WHEN HE GOT HIS RT FOOT CAUGHT IN A HYDRAULIC SLIDE GATE. HE WAS WORKING IN A DRAG CHAIN CHUTE IN THE PROCESS OF HIS WORK HE LOWERED HIS RIGHT LEG DOWN INTO THE CHUTE IN T HE LINE OF FIRE OF THE SLIDE GATE WHICH WAS 18"" BELOW HIS WORK AREA. THE GATE WAS CLOSED INADVERTENTLY PINCHING HIS FOOT BETWEEN THE CHUTE AND THE GATE.