As used in RCW 35.92.280 through 35.92.310 "electric utility properties" shall mean any and all permits, licenses, property rights, water rights and any and all works, plants, dams, powerhouses, transmission lines, switchyards, substations, property and facilities of every kind and character which may be used, or may be useful, in the generation and transmission of electric power and energy, produced by water power, steam or any other methods.