NOVELTY - The power generation machine (200) has a selectively blockable frame that is provided with an open and closed position arranged within a gate. The gate impounds water. A turbine is arranged within the blockable frame. The turbine is operably engaged to a generator (270) which is mounted on the gate. The turbine is positioned to receive energy from the impoundment of water when frame is in an unblocked position. The turbine and generator generate energy by the movement of water through turbine and a rotation of the turbine.    USE - Machine for power generation through water impoundment behind moveable gate at navigational lock and dam (all claimed). Can also be used in power generation by interconnected turbine and hydraulic pumps used for retrofit applications to flood control dams, recreational segments of water created by dams, dam gates, spillways, tidal or ocean current settings, river current or in aqueducts, irrigation canals, and effluent discharge from man made orifice or pipe.    ADVANTAGE - The readily movable, interchangeable and modular power generation systems, turbines, turbine vanes, rotors, ducting, diffusers, runners and speed increasers are provided with the ability to be subjected to various fluid flow regimes which allow for selectively accommodating a wide variety of fluid flow conditions. The small amounts of energy generated by an individual cell are added together to produce a larger amount of electrical energy. The single turbine housing and impeller are provided with several fan blades, for capturing the maximum amount of energy from the movement of water. The cross brace provides added stability. The polymer transfer plate can be mounted on the top of several cells for additional stacking, to provide electrical interconnection and thus permit transfer of power from an array to a rectifier/inverter and then to a grid. This arrangement permits ready installation and ease of repair. The hydraulic pumps are suspended over the water deriving their power from water driven turbines, so that maintenance and operational costs are reduced, and the servicing and repair needs are also reduced. A series of pumps can be configured in any of a variety of manners to best utilize the flow of the water and to fit any particularities of the terrain. The power generating cell include certain safely features, including having illumination technology coupled to various portions of flexible ducting for warning of location of power generating cell during the night time. The impellers can operate at extremely low speeds so that aquatic life is not damaged during certain periods of operation and the collision warning systems can be operatively associated with power generating cell so that foreign objects, such as boats, barges, airplanes and other fluid operating vehicles are warned of the presence of power generating cell. The uprights can selectively extend and collapse when fluid conditions provide for efficiency in power generation. The head is created in a flowing current that can be used by a hydrokinetic energy production system to enhance and increase the production of the system without building a dam or impoundment. The stationary or rotating or counter-rotating exterior blade provisions are provided about a hydrokinetic turbine to increase the pressure drop across the turbine, so that the turbine is enabled to operate using higher water velocity relative to the ambient, thus the power production can be increased and individual elements can be enabled to operate near the modes of their peak efficiencies. The additional increase in the kinetic energy of the water can be obtained by keeping the cross sectional area of the channel for the flowing water relatively constant, so that the quantity of power generated by the hydrokinetic system can be increased. The tailrace walls greatly increase the velocity of downstream flow to the hydrokinetic turbines so that significantly higher amounts of power can be generated.    DESCRIPTION OF DRAWING(S) - The drawing shows the perspective view of a power generating cell having a rounded outer wall made of ducting, and one or more impellers fixedly coupled to a ring engaged to a turbine driven shaft and chain drive.    Power generation machine (200)    Energy transfer segment (221)    Chain segment (260)    Generator (270)    Cross bracing (272)