The National Mining Association has condemned a ruling by the U.S. Court of Appeals for the D.C. Circuit allowing the U.S. Environmental Protection Agency officials to “clearly and unambiguously” revoke Clean Water Act 404 (c) permits after prior issuance by the U.S. Army Corps of Engineers. The move reversed a lower court ruling annulling the EPA’s authority to void the Spruce No. 1 permit held by the Mingo Logan Coal Co., an Arch Coal subsidiary in West Virginia.