American Petroleum Institute v. Johnson, 541 F.Supp.2d 165 (D. D.C. 2008)

(EPA’s 2002 regulatory definition of “navigable waters” (40 C.F.R. §112) under the Clean Water Act found to be arbitrary and capricious and in violation of the Administrative Procedures Act; EPA failed to consider impact of 2001 U.S. Supreme Court opinion in SWANCC and regulation was, therefore, not a product of reasoned decision-making and must be set aside).