a hydraulic power system is used in a river , ocean or any other body of water having a current . the method is useful for generating useful electric power from flowing water . the flowing water rotates a turbine and a pump that provides hydraulic power to an electric generator for a clean , renewable energy source . the hydraulic power system tethered to the bottom of a body of water and a positive buoyancy mechanism can be integrated or tethered to the pump assembly . the positive buoyancy can support the pump assembly at a predetermined distance above the sea floor .