EE WAS PERFORMING HIS DAILY DUTIES, WHICH ARE REQUIRED AFTER THE LOADING OF THE TRAIN. GENERAL CLEAN UP INCLUDES SHOVELING SPLIT COAL, GREASING MACHINERY, & HOSING THE LOADOUT & DRAWOFF TUNNEL DOWN. WHILE DOING SO EE EXPERIENCED SLIGHT PAIN & DISCOMFORT IN THE CHEST, SHORTNESS OF BREATH & LIGHTHEADNESS. AFTER RESTING A FEW MIN WAS TAKEN TO HOSPITAL-DIAG SUFFERED FROM A HEART ATTACK