Abstract: A method and apparatus for generating power includes providing at least one elongated chamber having a float reciprocatively mounted therewithin for axial and reciprocative movement and having at least one opening in the chamber, and disposing vertically the chamber in an intermediate portion of a constantly downwardly flowing body of water between an upper-elevational portion thereof and a lower-elevational portion thereof with the opening in the chamber communicating with the water. The flow of water is alternatingly interrupted and permitted to enter the chamber via its opening to cause the float to be carried by the water in the chamber reciprocatively upwardly and downwardly within the chamber, and the reciprocative movement of the float is utilized by, for example, converting the reciprocative motion to rotational motion for driving an electrical generator.