Abstract: An electric generation system includes a plurality of connected water filled chambers, each having a pivoting door that sequentially covers and exposes an access port through which buoyant objects travel to an ascending water filled tube leading to a bucket conveyor that drives a generator. The pivoting doors are synchronized so that one is opened while the other is closed. The doors are opened and closed by hemispherical cams driven by a motor. The pivoting doors propel buoyant objects towards the tube.