The Federal power marketing program began in the early 1900s when power produced at Federal water projects in excess of project needs was sold in order to repay the Government's investment in the projects. Power Marketing Administrations market this power in such a manner as to encourage the most widespread use thereof at the lowest possible rates to consumers consistent with sound business principles
Each of the four power marketing administrations is a distinct and self-contained entity within the Department of Energy, much like a wholly owned subsidiary of a corporation.