Pilot tube boring is a two step process. The first step is to establish the bore path with pilot tubes. The second step is to follow the pilot tube with a larger diameter casing and/or carrier pipe. Launch and reception shafts are strategically located to minimize disruption. GBM's are used in conjuction with a guidance system to provide accurate pipe installation. GBM's can also be used in conjunction with Auger Boring or Pipe Ramming.

Iowa Trenchless crew uses a pilot bore mirotunneling system which provides very precise line and grade over long distances for smaller pipe where conventional methods are virtually ruled out.

The bore is completed when the pilot tube is followed by a steel casing and the pilot tubes are pushed out..

Pilot system entering a manhole on a two hundred and
fifty foot drive for sanitary sewer on line and grade.