A classifier device for separating heavy materials from a stream of water and lighter materials includes an upper deck above lower deck, each deck having entrance and exit sides. The exit side of the lower deck terminates in a plurality of apertures. An exit plate is disposed adjacent the exit side of the upper deck and elevated relative thereto. A trap compartment is disposed below the exit plate and receives a removable trap that has an open top side and a plurality of pipes that each have at least one fluidizing aperture and that are aligned with one of the apertures of the lower deck. A classification plate is included between the exit side of the upper deck and the exit plate for directing the larger light materials up and over the exit plate back into the stream of water. Smaller materials drop through the classification plate into the trap.

The sluice box mouth and sifter pan system includes a sluice box mouth and a plurality of stackable sifter pans. The sluice box mouth includes a substantially planar bottom plate with a first upright sidewall extending from a first edge of the plate and an opposing second upright sidewall extending from an opposing, second edge of the plate. One of the sifter pans can be removably positioned on the bottom plate. The first and second sidewalls each include an arcuate portion for engaging a peripheral wall of the pan and securing the pan to the sluice box mouth.

The sluice box mouth and sifter pan system includes a sluice box mouth and a plurality of stackable sifter pans. The sluice box mouth includes a substantially planar bottom plate with a first upright sidewall extending from a first edge of the plate and an opposing second upright sidewall extending from an opposing, second edge of the plate. One of the sifter pans can be removably positioned on the bottom plate. The first and second sidewalls each include an arcuate portion for engaging a peripheral wall of the pan and securing the pan to the sluice box mouth.

A method and system of treating wetland areas includes collecting a slurry that includes sand/large particulates, water, and fines. The sand/large particulates are separated from the water and fines of the slurry. The sand/large particulates is preferably returned to a waterway or beach reclamation project. The water and fines are directed for application to wetland areas.

A method and system of treating wetland areas includes collecting a slurry that includes sand/large particulates, water, and fines. The sand/large particulates are separated from the water and fines of the slurry. The sand/large particulates is preferably returned to a waterway or beach reclamation project. The water and fines are directed for application to wetland areas.

The sluice box mouth and sifter pan system includes a sluice box mouth and a plurality of stackable sifter pans. The sluice box mouth includes a substantially planar bottom plate with a first upright sidewall extending from a first edge of the plate and an opposing second upright sidewall extending from an opposing, second edge of the plate. One of the sifter pans can be removably positioned on the bottom plate. The first and second sidewalls each include an arcuate portion for engaging a peripheral wall of the pan and securing the pan to the sluice box mouth.

A highbanker may be used with sluice mats to separate heavier metals from placer deposit. The highbanker includes a hopper assembly, a trough assembly, a brace member, and a plurality of legs. The trough assembly includes first and second trough sections. The first trough section includes a first surface and is pivotably connected to the hopper assembly. The second trough section includes a second surface, with the second trough section being removably attachable to the first trough section. The brace member extends between the trough assembly and the hopper assembly. The plurality of legs is removably attachable to the trough assembly. In an assembled configuration, the second trough section is attached to the first trough section so that the first surface and the second surface define a substantially continuous surface for accepting the sluice mats. In a nested configuration, the second trough section is nested within the first trough section.

A highbanker may be used with sluice mats to separate heavier metals from placer deposit. The highbanker includes a hopper assembly, a trough assembly, a brace member, and a plurality of legs. The trough assembly includes first and second trough sections. The first trough section includes a first surface and is pivotably connected to the hopper assembly. The second trough section includes a second surface, with the second trough section being removably attachable to the first trough section. The brace member extends between the trough assembly and the hopper assembly. The plurality of legs is removably attachable to the trough assembly. In an assembled configuration, the second trough section is attached to the first trough section so that the first surface and the second surface define a substantially continuous surface for accepting the sluice mats. In a nested configuration, the second trough section is nested within the first trough section.

A hopper assembly for accepting placer deposit and water for use with a highbanker includes a hopper and a cover. The hopper includes an intake surface for accepting the placer deposit, a hopper periphery portion extending along a periphery of the hopper, a water intake, and a window configured to allow the placer deposit and water to exit from the hopper. The water intake accepts water and is located within the hopper periphery portion. The cover includes a cover surface and a plurality of cover openings. The cover surface fits over the hopper periphery portion. The cover openings are formed on the cover surface. The cover surface and the hopper periphery portion define, at least in part, a hollow within which water from the water intake flows. The cover openings allow for water to exit the hollow and contact the placer deposit on the intake surface.

A hopper assembly for accepting placer deposit and water for use with a highbanker includes a hopper and a cover. The hopper includes an intake surface for accepting the placer deposit, a hopper periphery portion extending along a periphery of the hopper, a water intake, and a window configured to allow the placer deposit and water to exit from the hopper. The water intake accepts water and is located within the hopper periphery portion. The cover includes a cover surface and a plurality of cover openings. The cover surface fits over the hopper periphery portion. The cover openings are formed on the cover surface. The cover surface and the hopper periphery portion define, at least in part, a hollow within which water from the water intake flows. The cover openings allow for water to exit the hollow and contact the placer deposit on the intake surface.