Installing gravity-flow sewer systems using horizontal directional drilling (HDD)—including those lines on critical grades of <1%—has been a goal of the directional drilling industry that has been achieved with varying degrees of success in recent years. HDD offers the advantages of reduced surface restoration, the ability to install product under roadways and structures, and reduced cost versus microtunneling.

A recent trenchless technology webinar presented by the Ditch Witch organization, Gravity Sewer Installations Using HDD, discusses advances in on-grade installation, including improvements in downhole tooling, tracking electronics, and drilling techniques.

Download the webinar.