Abstract: Apparatus for generating hydroelectric power comprising a portable collector tube assembly which can be transported to the site of a water source having a waterfall sufficient in magnitude to provide a pressure head for driving a turbine generator. The tube assembly comprises telescopically arranged inner and outer tubes, and means for rotating the tube assembly and extending the inner tube so as to place the upper, extended end thereof in a position within and below the top of the waterfall so as to take advantage of the resulting hydrodynamic and hydrostatic forces.

Abstract: An electric generating system relying on wave action forces, wherein a shallow reservoir is provided and confined by a cofferdam or silo so as to provide a hydrostatic head between the reservoir and the open body of water exterior to the cofferdam or silo. The hydrostatic head drives turbine generators, and spent water is discharged from the generators into the reservoir. Pump and float assemblies are mounted on the exterior of the cofferdam or silo and function to withdraw water from the reservoir responsive to upwardly directed wave forces thereby maintaining the hydrostatic head.