EE WAS WETTING DOWN THE MUCKPILE FOR DUST CONTROL. HE HADSCALED EARLIER ALSO.HIS PARTNER WAS TO SERVICE HIS HAUL TRUCK AND HE USED THE TIME TO DO MORE BARRING SOWN. HE WAS NOT WEARING HIS GLOV ES AND A ROCK APPROX 5"" IN DIAMETER THAT WAS FLAT FELL FROM BACK AND HIT HIS HAND HOLDING HOSE.