EMPLOYEE WAS DISMOUNTING A SKID STEER LOADER OUTSIDE THE MAINTENANCE SHOP. SHE SLIPPED ON THE EDGE OF THE WET BUCKET SPRAINING HER RT. ANKLE. SHE INITIALLY REFUSED TREATMENT BUT AGREED TO A MEDICAL EVALUATION ON 4/15/04. X-RAYS REVEALED NO BONE DAMAGE. IT WAS RAINING AT THE TIME OF THE INCIDENT.