Microwave or radar transmission facilities,.Other transmitters such as radio and TV transmission facilities,. Buried utility line with cables or trace lines that transmit high frequency signals.Traffic-sensing loops and traffic signal pads,.Look for signal strength variations or other unusual readings and mark these locations.”Īctive sources of interference include but are not limited to: Turn your tracking receiver on but leave the transmitter off. Before starting work, check for sources of interference.ĪEM suggests the following: “Walk the planned drill path with the drill operator. Tracking devices use electromagnetic fields to detect and track the drill head. The drill head must always be tracked to ensure that it stays on course. Workers should wear eye protection, electrically insulated rubber gloves, highly visible clothing and, in some situations, hearing protection. Proper footwear will reduce the possibility of a worker being electrically shocked if contact is made with an underground electric cable that could create ground voltages, some of which could be deadly. The Association of Equipment Manufacturers (AEM) recommends that all workers wear properly rated, electrically insulated footwear at all times, including during setup, drilling and other activities. Inspect all equipment, including safety equipment, to make sure it is in good condition. ** Advertisement ** // Proper Equipmentīefore drilling, make sure the workers have been trained to perform their tasks and they have the right safety equipment. Many directional drillers have drilled deep only to find that somebody else had the same idea before them. Just going deep under existing utilities is not the answer and often leads to serious problems. The drill head should be tracked by an experienced worker using a tracking device so he/she can direct the operator to steer the drill over, under or around the existing utilities. Once the horizontal location is known and the utilities have been exposed to determine their depth at regular intervals along the drill path, the next step is to start drilling. Without a doubt, these are probably the two most important things an HDD contractor must do before beginning any job. Therefore, the first step in preventing damage is that the contractor must call Dig Safe or the local one-call center for a locate to get the existing utilities marked and physically identified. The biggest problem that all directional drillers face is striking existing underground utilities. As with open-cut utility construction, HDD has its share of hazards that must be controlled or eliminated in order to ensure worker and public safety. From the safety perspective, no method is perfect.
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