Horizontal Directional Drilling (HDD)
Horizontal directional drilling (HDD) is a better way to install or replace underground utilities with minimal site disruption and restoration costs. Directional drilling is a two stage process. In stage one a steerable drill head is used for boring a pilot hole to a pre-designated point. In stage two the drill head is removed and replaced with a back reamer to help open the hole. Then the back reamer and the conduit are pulled back through the hole. The advantage of this installation process is the absence of costly surface restoration, little or no disruption of traffic, and the ability to steer up and down very precisely around existing obstacles and utilities.