THE EE WAS OPERATING A ROCK BREAKER ON THE 1600 ORE PASS WHILE HIS ROCK BOLTER WAS IN THE SHOP FOR PERIODIC MAINTENANCE. AT 2:30 P.M. HE WAS INFORMED THAT THE ROCK BOLTER WAS AVAILABLE. A CONT RACT EE SAW HIM AT APPROX. 2:55 P.M. AT 3:05 P.M. HE WAS FOUND LYING ON THE GROUND JSUT INSIDE THE AIR DOORS AT THE 1600 STATION. HE WAS NOT BREATHING AND CPR WAS INITIATED. PROUNDED DEAD 440