Columbia River hydropower and miscellaneous land management bills : hearing before the Subcommittees on Water and Power and Forests and Public Land Management of the Committee on Energy and Natural Resources, United States Senate, One Hundred Sixth Congress, second session, to conduct oversight on the status of the biological opinions of the National Marine Fisheries Service and the U.S. Fish and Wildlife Service on the operations of the federal hydropower system of the Columbia River and miscellaneous land management bills, September 12, 2000, July 20, 2000.