There remains a need for non-labor intensive, safe, and effective upstream and downstream transport of fish at medium and high head dams and hydroelectric projects. The proposed Obermeyer system combines pneumatically operated gates for diverting fish into a lifting (and lowering) system with a variable speed reversible pump-turbine that hydraulically transports a floating cage of submerged fish through an auxiliary penstock between a tailwater fish trap and the upper reservoir. Fish are not subjected to high velocity flows, harmful pressure changes, or turbine transit. The pumping energy required for upstream transport is almost completely recovered while draining the auxiliary penstock which may be used for downstream as well as upstream fish passage. Energy use may be further cut in half by using two auxiliary penstocks. The pump-turbine associated with the fish passage system may be used for additional and efficient hydropower generation during non-fish passage seasons.
Sponsored By: Obermeyer Hydro, Inc.
Obermeyer Hydro – A leading provider of hydropower and water-control equipment
Headquartered in Northern Colorado, Obermeyer Hydro, Inc. combines decades of water control experience with unparalleled innovation reflected in dozens of patents. Founded in 1988, Obermeyer designs and supplies inflatable water control gates, rubber dams, flood barriers, and hydraulic turbines. It is our mission to continuously improve upon the application of state-of-the-art materials, processes, and engineering to water control and generation of hydropower on a global scale. Our 600 plus completed projects in over 27 countries help supply millions of people with water and electricity every day.