This system has proven to be effective in preventing expensive gas line, water line and sewer line hits. It also has the potential to save lives if used for the necessary applications. The WMS-1B was developed by Audio Supply to serve the Horizontal Underground Drilling Industry. It has been effectively used by hundreds of underground drilling and boring companies throughout the nation. By monitoring the sound of the drill-head it is possible to identify when it meets an obstruction such as a sewer or gas line. This is done by placing a microphone in a nearby manhole to listen to the sound of the drill as it progresses. Many municipalities are now requiring that their local drilling companies employ the WMS-1B. By reducing costs that incur with hitting a utility line, more money is kept in your pocket; the loss of man hours, damage to property, reducing cost of after hour repairs, preventing potentially fatal injuries, building a reputable safety history. Several years ago one of the nation
