Abstract: The invention relates to an apparatus for relocating sedimentary materials particularly from the bottom of water channels. The invention utilizes a water jet fluidizer to displace sedimentary materials and to suspend them in a water flow. The water flow containing the suspended, dispersed sedimentary material is contained within a shaped duct means and re-directed as a uni-directional flow, so that re-deposition of the displaced sediments is controlled. The apparatus includes a manifold having parallel water jets spaced apart in a transverse direction along it; a parallelogram linkage for controlling the position of the manifold; a hose for supplying water under pressure to the manifold; and a duct means arranged opposite the manifold for directing the flow of dislodged sedimentary material in suspension. The apparatus preferably is supported on wheels and is controlled by the linkage from a boat. In shallow water, the device may be supported on a hand controlled trolley.