20 of each body frame elongate conditioning conduit 39 extends between a plurality of channel stations in such position that it is carried by the support fixture 38 of each station of that plurality in the instance illustrated the conditioning conduit is supplied with pressurized water by conditioning system pump 40 having inlet 41 to receive water from watercourse 10 and output conduit 42 having valve 43 therein to controllably pass that pressurized water to the channel of conditioning conduit 39 the pump 40 is serviced by a material input port 44 to allow various beneficiating materials to be injected into the pressurized water passing through output channel 42 the output channel 42 communicates by conduit 47 with the channels defined in the side elements of one or more channel station body frames for dispersement from the body frames of the materials carried by the output channel it is possible that pressurized water may be supplied to the conditioning conduit 39 by primary pump 32 and this structure is within the scope of my invention though it is not illustrated in the drawings having thusly described the structure of my apparatus its operation and use may be understood firstly a system as specified is constructed and its various elements established in watercourse 10 with the channel stations spacedly adjacent each other to allow definition of the periphery of a.