Roadway access hole drill and a method of microtrenching using the drill to open an access hole in the roadway

A method of cutting an access hole in a roadway comprising:

• providing a roadway access drill comprising a down-the-hole hammer drill having a drill bit and a jack-hammer that vibrates the drill bit, and a motor attached to the down-the-hole hammer drill that rotates the drill bit, and the roadway comprising asphalt and/or concrete;
• placing a debris containment collar on a roadway surface over a buried utility, the debris containment collar having a debris containment collar body defining a hollow chamber sized to accept the drill bit;
• inserting the drill bit into the hollow chamber of the debris containment collar so that the debris containment collar body surrounds the drill bit, the drill bit having a diameter of about 6 to about 48 inches;
• activating the motor and jack-hammer to provide a rotating and vibrating drill bit;
• powering the jack-hammer with compressed air from an air compressor;
• and
• drilling an access hole only in the roadway by lowering the rotating and vibrating drill bit into the roadway, wherein the debris containment collar prevents debris formed during the drilling from flying away, and wherein the rotating and vibrating drill bit is lowered less than 10 feet during drilling of the access hole.