WHILE WIDENING THE ROAD TO THE SOUTH TAILS DAM, A LARGE ROCK ROLLED OFF THE EMBANKMENT STRIKING A 480V SUPPLY SWITCH MOUNTED ON A POWER POLE AT THE TOE OF THE BANK. THE SPARKS STARTED A FIRE IN DRY BRUSH. THE EMERGENCY RESPONSE TEAM RESPONSED WITH A FULL CREW AND EXTINGUISHED THE FIRE AT APPROX. 11A.M. THE FIRE DID NOT ENDANGER ANY PERSONS OR MINE FACILITIES.