Patent ID: 6394699
Filing Date: 2002-05-28
Classification: A01K,E02B,Y02A

Abstract:
An apparatus for reduced flow rate fish passage, comprising:a passage unit; said passage unit having a tubular passageway or pipe therein; said passage unit having a pair of valves, said pair of valves being an upstream valve and a downstream valve and being used to close off said tubular passageway at or near each end of said passage unit; said passage unit having a fabricated base, said fabricated base supporting said tubular passageway and aiding in spacing and supporting said pair of valves; an attraction flow device, said attraction flow device providing downstream spillover to aid in directing fish to said passage unit; an additional passageway or pipe, said additional passageway or pipe extending from said obstruction to said attraction flow device and having a valve to close off said additional passageway; said tubular passageway and said pair of valves being connected to said fabricated base by a plurality of support straps; said valves having an opening, a closing means, a valve stem, and an operator to close off said opening; said unit being installed essentially parallel to and below the surface of a water body and adjacent to an obstruction of which the fish must pass; said pair of valves being synchronized for two-stage opening; and, an optional valve, which optional valve is a main shut-off valve.