Horizontal Directional Drilling
HDD is a trenchless construction method that involves drilling a small pilot hole, using technology that allows the drill to be steered and tracked from the surface. The pilot bore is launched from the surface at an angle between 8 and 20 degrees to the horizontal, and transitions to horizontal as the required depth is reached. A bore path of very gradual curvature or near-straight alignment is normally followed to minimize friction and to stay within the allowable joint deflection and the allowable curve radius for the pipe.

Poly Pipe Fusion
ETTI is your one-stop poly fusion service provider covering pipe and fittings from 1” to 36” throughout the Northeast. All crew members are McElroy certified and hold Northeast Gas Association certification for poly pipe joining. ETTI crews have logged in over 455,000’ of poly pipe joining in the past 12 years on more than 2,100 projects without a single reported leak in the system. We pledge to provide the most skilled workforce in the industry with strict guidelines for quality and safety.

Utility Services
In 2006, ETTI opened a utility services division to provide open trench construction in addition to our trenchless services. ETTI holds the master contract to install all main line and services for Maine Natural Gas as well as Bangor Gas. All crew members are certified through the Northeast Gas Association for pipe joining and all Operator Qualification training and testing. Combining our trenchless services with highly skilled trenching crews has produced superior results to the public, our clients and overall project completion schedules.