This dataset represents electricity generation of conventional hydropower plants and pumped-storage hydropower plants in a specific region, i.e., the weighted aggregation of reservoir-type hydropower, run-of-river hydropower, and pumped-storage hydropower. Hydropower plant construction parameters are set according to design standard specifications: the technical service life is 30 years for small-scale hydropower projects, 50 years for medium-scale projects, and 100 years for large-scale projects. The data are primarily derived from official statistics.