A recent high potential incident highlights the need to alert personnel to the dangers of drilling or digging on PDO installations. The incident occurred during soil sampling in preparation for the construction of a telecommunications tower. A core sample was being taken using a coring rig. A permit to work was obtained and the site was checked for buried cables using hand tools before the drilling started. A pilot trench was hand dug and drilling began shortly afterwards. The drill severed a 415 volt buried supply cable causing loss of power to a nearby well. No injuries were sustained by the workers.