Exemption of small hydroelectric power projects: hearing before a subcommittee of the Committee on Interstate and Foreign Commerce, House of Representatives, Eighty-seventh Congress, second session, on H.R. 6951, a bill to authorize the Federal Power Commission to exempt small hydroelectric projects from certain of the licensing provisions of the Federal power act, [and] S. 1606, an act to authorize the Federal Power Commission to exempt small hydroelectric projects from certain of the licensing provisions of the Federal power act, June 14, 1962.