Patent ID: 8262317

Claim:
A flow separation apparatus for separating aquatic life from fluid flow entering a dam intake in an upstream reservoir and fluidly transporting said aquatic life to a downstream reservoir at a lower elevation, comprising: a first component, said first component having a first conduit structure defined by an interior surface of a surrounding sidewall, said interior surface communicating with a fluid inlet at a first end for receiving water and fish from below a surface of said upstream reservoir, and with a first exit aperture at a second end opposite said first end; a first communication conduit having an intake aperture in sealed communication with a lower end of said first conduit structure and said dam intake; a second communication conduit communicating between an opening in said lower end of said first conduit structure, and said dam intake; an intermediate conduit communicating said second end of said first conduit structure and a second exit aperture positioned below the surface of said downstream reservoir; a vertically disposed weir extending from a first end adjacent to said interior surface of said sidewall at a position between said first communication conduit and said second communication conduit, to a distal end; a screen positioned to filter all fluid flow through said intake aperture to said dam intake, said screen extending from a first edge adjacent to said interior surface, to a second edge at said distal end of said weir; a narrowed area of said first conduit structure, said narrowed area defined by said distal end of said weir, and said interior surface opposite thereto; said screen and said incline providing a means to induce turbulence in said water flowing adjacent to said screen; said incline providing a means to induce an inclining trajectory to a stream of said water flowing from said fluid inlet and over said screen, through said narrowed area; said turbulence providing a means to prevent contact by fish with said screen; said stream providing a means to fluidly urge fish through said narrowed area with said stream and into a positioning in said upper portion of said first conduit structure; said second communication conduit communicating a portion of said water traversing said narrowed portion, from a lower portion of said first conduit structure, to said dam intake; and said intermediate conduit communicating said fish traversing said narrowed area to said upper portion, within a remainder water stream and through said exit aperture positioned under the surface of said downstream reservoir, whereby fish entering said first conduit structure are prevented from contact with said screen by said turbulence and traverse said narrowed area within a stream of water to said upper portion, distant from said lower portion being communicated to said dam intake, and thereafter through said intermediate conduit to said lower reservoir, thereby providing a means to separate said fish from water entering said dam intake.