Alternate-storage hydroelectricity is an arrangement to store water in addition to the main reservoir in the nearby catchment area of the dam. This is an arrangement wherein hydroelectric energy stored in the alternate reservoir can be used by an electric generator for load balancing during the peak summer season when the demand is high. The method stores energy in the form of the potential energy of water-induced with gravitational force, stored in an alternative reservoir in the close proximity of the main reservoir. During periods of high electrical demand, the stored water in the alternate reservoir is released into the main reservoir through an intake tunnel and released through turbines to produce electric power. The cost incurred in the construction of an alternative reservoir with a series of water-retaining structures in the form of a weir or dam can be collected by generating revenue from selling more electricity during periods of peak demand when electricity prices are highest and also demand is more throughout the project life cycle.