480 F.3d 410 NATIONAL PARKS CONSERVATION ASSOCIATION, INC.; Sierra Club, Inc.; and Our Children’s Earth Foundation, Plaintiffs-Appellants,v.TENNESSEE VALLEY AUTHORITY, Defendant-Appellee. No. 05-6329. United States Court of Appeals, Sixth Circuit. Argued: September 18, 2006. Decided and Filed: March 2, 2007. ARGUED: George E. Hays, San Francisco, California, for Appellants. Frank H. Lancaster, Tennessee Valley Authority, Knoxville, […]