Ashwander v. Tennessee Valley Authority…
“ The argument is stressed that, assuming that electric energy generated at the dam belongs to the United States, the Congress has authority to dispose of this energy only to the extent that it is a surplus necessarily created in the course of making munitions of war or operating the works for navigation purposes; that is, that the remainder of the available energy must be lost or go to waste. We find nothing in the Constitution which imposes such a limitation. It is not to be deduced from the mere fact that the electric energy is only potentially available until the generators are operated. ”
