Powerplant Fuel Conservation Act of 1980 : Hearings before the Subcommittee on Energy and Power of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninety-sixth Congress, second session, on H.R. 6930, H.R. 5669, H.R. 6514, H.R. 6947, and H.R. 6999 bills to expedite the conversion by certain existing electric powerplants from the use of oil to coal or another alternate fuel, to conserve oil and natural gas used by other powerplants, and to assist the ratepayers of the electric utilities involved in reducing the costs of conversion and insuring that petroleum and natural gas costs are reasonable; to amend the Powerplant and Industrial Fuel Use Act of 1978; and for other purposes, April 2, 18, and 21, 1980.