The safest and most effective method to build an interceptor trench is with the use of one-pass trenching. The large, heavy equipment used for one-pass trenching is owned and operated by DeWind, LaBella’s subcontractor on this project.
One-pass installations are constructed underground below the groundwater table in highly fluid soils like the ones found at the Kingsbury Landfill site. As the name indicates, one-pass trenching performs all the functions needed – digging the trench, laying the pipe, mixing the soil, and filling in the trench – in one pass.
Clearly the efficiency of the one-pass machinery is unsurpassed, but the most critical benefit is worker safety. The one-pass technique significantly reduces safety risks as there is no open trench, no dewatering, no shoring/sheeting, no pumping and treating, and no massive excavations.