The unit designated as Shasta Dam consists of the following:
(a) A dam, reservoir, and one or more hydroelectric power plants, with necessary afterbay and regulatory appurtenant works located on the Sacramento River at or near Kennett.
(b) A transmission line having capacity sufficient to transmit all the electric power which can be generated at the dam, including substations, transformer stations, and other facilities for the distribution of power from the dam to a central substation near Antioch.