THE EE WAS RAISING YELLOW PLASTIC WATERLINE WHICH WAS HANGING IN CHAINS SO IT WOULD BE POSSIBLE INSTALL TROLLEY WIRE IN A SWITCH. THE INJURED LIFTS THIS AMOUNT EVERY TIME THEY INSTALL. A SWITC H INTO A SPUR AND HAS NOT BEEN INJURED BEFORE PERFORMING THIS TASK. ACCORDING TO THE INJURED HE KNOWS AND WAS USING PROPER LIFTING TECHNIQUES. HE FELT A PAIN IN THE GROIN AND THE INJURY WAS D