Abstract: A barrier wall configured for formation and placement within a formed trench. The barrier wall is formed from a plurality of wall segments. Each wall segment comprises a wall body, a length coupling subassembly and a width coupling subassembly. The wall body includes a front surface and a back surface. The length coupling subassembly is coupled to the wall body. The width coupling subassembly coupled to the wall body. The plurality of wall segments can be attached to each other by joining at least one of the length coupling subassembly of one of the plurality of wall segments to another one of the plurality of wall segments, and the width coupling subassembly of one of the plurality of wall segments to another one of the plurality of wall segments.

Abstract: A boom assembly for a trencher having a boom frame member, a boom drive assembly and a plurality of boom arm assemblies. The boom frame member configured to be attachable to the trencher. The boom drive assembly attached to the boom frame member, having an output shaft that is rotatably actuatable. The plurality of boom arm assemblies extending from the boom frame member, the plurality of boom arm assemblies including at least a first boom arm assembly and a second boom arm assembly. The first and second boom arm assemblies can be of differing length, width, angle and may operate at different speeds.

Abstract: An adjustable auger assembly for a trencher including an auger housing and a position attachment assembly. The auger housing having a central auger tube having a first end and a discharge end opposite the first end. An auger shaft is positioned within the auger tube and is rotatable relative to the central auger tube. At least one material inlet is positioned one of at the first end and between the first end and the discharge end. The position attachment assembly has a first component member coupled to the trencher, and a second component member coupled to the auger housing. The first component member is movably positionable relative to the second component member, to, in turn, adjust the position of the auger housing relative to the trencher.

Abstract: An adjustable auger assembly for a trencher including an auger housing and a position attachment assembly. The auger housing having a central auger tube having a first end and a discharge end opposite the first end. An auger shaft is positioned within the auger tube and is rotatable relative to the central auger tube. At least one material inlet is positioned one of at the first end and between the first end and the discharge end. The position attachment assembly has a first component member coupled to the trencher, and a second component member coupled to the auger housing. The first component member is movably positionable relative to the second component member, to, in turn, adjust the position of the auger housing relative to the trencher.

Abstract: A method of forming an underground slurry wall having the steps of: (a) providing a trencher having a trenching arm assembly with a cutting tooth track; (b) providing a dispensing tube proximate the cutting tooth track; (c) rotating the cutting tooth track; (d) extending the cutting tooth track below the outside surface, to, in turn, agitate the soil therebelow to a predetermined depth; (d) translating the trenching arm assembly across the outside surface so as to form an underground wall of agitated soil; (e) dispensing a clay-like material proximate the cutting tooth track; and (f) utilizing the cutting tooth track to mix the clay-like material into the soil while the cutting tooth track is rotating and translating, to, in turn, mix the clay-like material into the agitated soil. Systems are likewise disclosed.