Tide change apparatus and methodology for converting tidal energy into usable mechanical and electrical energy using wedge-hinge assemblies. Electricity is generated by transfer of mechanical energy from both incoming and outgoing tidewaters to an electrical generator. A pair of wedge-hinge assemblies mounted atop semi-submersible barges to enable water to alternately flow into and out of a retention pond relative to a corresponding main body of water in accordance with natural tidal flow.