SIERRA CLUB; ARKANSAS WILDLIFE FEDERATION, INC.; AND FRIENDS OF CRATER OF DIAMONDS, STATE PARK, INC., APPELLEES, v. RICHARD DAVIES, ACTING DIRECTOR OF ARKANSAS PARKS AND TOURISM; ARKANSAS PARKS RECREATION TRAVEL COMMISSION; JOHN COOK, DIRECTOR, NATIONAL PARK SERVICE, S.W. REGION; MANUAL LUJAN, SECRETARY, U.S. DEPARTMENT OF THE INTERIOR. CAPRICORN DIAMONDS, LTD.; AND KENNECOTT CORPORATION, (INTERVENORS/THIRD PARTY) […]