Auger boring is the process of forming a horizontal bore by jacking the steel casing through the earth from a main shaft to a reception shaft.

During horizontal auger boring, a horizontal shaft is driven  from the drive to the reception shaft using a rotating cutting head. The excavated material is brought back to the drive shaft where it is removed. As the bore advances, a casing is pushed into place using a hydraulic jack.

This process is called Horizontal Thrust Boring (HTB) and is one of the oldest and most basic forms of trenchless technology used for installing underground utilities; roads and railway crossings without interference with vehicular and train traffics.