There is provided a plastic infiltration unit comprising: a top deck, at least one pillar extending from the top deck, wherein the at least one pillar includes a plurality of compartments, wherein at least one of the compartments is laterally enclosed, and wherein the top deck and the at least one pillar are produced in one piece. There is further provided a plastic base plate for use with a plastic infiltration unit. There is further provided a plastic infiltration unit side plate. There is yet further provided a plastic in filtration system for deployment underground comprising a plastic infiltration unit and a plastic base plate, wherein the at least one pillar of the plastic infiltration unit is received at the receiving location of the plastic base plate.

The invention relates to a drain trench body having base plates (11, 12), between which columns (13) are arranged vertically. The drain trench body comprises side walls (14) which are connected to the base plates (11, 12). The side walls (14) and the base plates (11, 12) have first and second locking elements (15, 16) which are in engagement with each other. The locking elements (15, 16) are movable relative to one another in the height direction along the longitudinal axis of the columns (13). The invention further relates to a center plate (20) for a drain trench body.

The invention relates to a trenching unit having at least two trenching bodies (10a, 10b), which each comprise an upper base plate (11), a lower base plate (12), and hollow columns (13a, 13b), which are arranged perpendicularly between the base plates (11, 12) and form column openings (14) in the base plates (11, 12), wherein the lower base plate (11) of the one trenching body (10a) and the upper base plate (12) of the other trenching body (10b) bear on one another in such a way that the column openings (14) of the two bearing base plates (11, 12) are arranged concentrically. It is characterized in that the trenching bodies (10a, 10b) are connected by at least one adapter (15), which comprises a bearing surface (16) and two insert profiles (17a, 17b), which are arranged on both sides of the bearing surface (16) and are connected thereto, wherein the bearing surface (16) is arranged between the bearing base plate (11, 12) and the insert profiles (17a, 17b) are inserted into two concentrically arranged column openings (14) of the bearing base plates (11, 12).

A field drainage system includes mainline pipes or trunks, which are placed in trenches. Riser assemblies are mounted on the mainline pipes with saddles. The saddles include saddle bases placed on top of the mainline pipe and saddle inlet couplings which communicate with upwardly-open openings in the mainline pipe. The riser assemblies include transitions, which connect to the saddle inlet couplings, and riser extensions which extend upwardly from the riser assembly transitions. The riser transitions can be inverted for measuring cut off lengths of the riser transitions, using the field surface as a guide. Multiple apertures are formed in the riser extension for admitting groundwater for drainage.

A collector system installed utilizing trenchless or minimally invasive methods and devices configured to intercept and direct surface and/or subsurface fluids to a designated reception location to control groundwater elevations is disclosed. In one aspect, a target collection and drainage area is identified and a gravity drainage pipe is accessed or trenchlessly installed at the target collection and drainage area. The gravity drainage pipe can be accessed at one or more drawdown points. An end of the collection pipe can be connected to the drain pipe. By venting an end of the collection pipe to the surface, surface and subsurface water is hydrostatically drawn into the collection pipe from the target collection and drainage area. The surface and subsurface water can be passively drained from the collection pipe into the distribution pipe and onto the designated reception location providing a green process that eliminates power dependency.

A collector system installed utilizing trenchless or minimally invasive methods and devices configured to intercept and direct surface and/or subsurface fluids to a designated reception location to control groundwater elevations is disclosed. In one aspect, a target collection and drainage area is identified and a gravity drainage pipe is accessed or trenchlessly installed at the target collection and drainage area. The gravity drainage pipe can be accessed at one or more drawdown points. An end of the collection pipe can be connected to the drain pipe. By venting an end of the collection pipe to the surface, surface and subsurface water is hydrostatically drawn into the collection pipe from the target collection and drainage area. The surface and subsurface water can be passively drained from the collection pipe into the distribution pipe and onto the designated reception location providing a green process that eliminates power dependency.

A trench drain defining a channel and having an accessory rib allowing the convenient attachment of accessories to the sides of a drain in order to facilitate the installation of a trench drain, place drain outlets at any convenient places along the trench drain, and to create right angle joints between two trench drains.

Individual hexagonal shaped modules used in an assembly for underground storage of storm water and other fluid storage needs. Modules are assembled into a resultant honeycomb shape for maximized structural strength and material use efficiency. Adjacent modules are in direct fluid communications with one another via openings or windows in module side walls. Assemblies include various top and side pieces along with access ports for entry into said assembly.

Individual hexagonal shaped modules used in an assembly for underground storage of storm water and other fluid storage needs. Modules are assembled into a resultant honeycomb shape for maximized structural strength and material use efficiency. Adjacent modules are in direct fluid communications with one another via openings or windows in module side walls. Assemblies include various top and side pieces along with access ports for entry into said assembly.

THIS invention relates to a method of disposing of residues from the comminution and processing of ores. The method includes the steps of classifying the processing residues into a water permeable sand fraction and a tailings fraction and depositing the tailings fraction and the sand fraction to form a multilayer structure contained by at least one containment wall (14) with the sand fraction forming continuous channels (12) through the tailings fraction (10) to allow water contained in the tailings and sand to flow by gravity, through the sand channels, to water discharge points (16), and recovering the water (18) from the water discharge points.