ON 12-24-01, INJURED WAS FUELING A D-6 DOZER. AS HE WAS DISMOUNTING, HE SLIPPED ON SOME FROZEN DIRT ON THE PUSH ARM AND FELL TO THE GROUND, TWISTING HIS RT. ANKLE. HE WAS TAKEN TO HOSPITAL ER WHERE HE WAS EXAMINED, XRAYED AND REFERRED TO OUR CO. DR. AND PUT ON RESTRICTED DUTY FROM WORK UNTIL HIS FOLLOWUP VISIT ON 1-2-01. THE XRAYS WERE NEGATIVE AND NO LOST TIME.