WILDEARTH GUARDIANS v. U.S. E.P.A.

Attorney(s) appearing for the Case

Jenny K. Harbine , Earthjustice, Bozeman, Montana ( John Barth , Hygiene, CO, and Ashley D. Wilmes , WildEarth Guardians, Boulder, CO, with her on the briefs), for Petitioners.

Chloe H. Kolman , United States Department of Justice, Environment & Natural Resources Division, Washington, D.C. ( Stephanie J. Talbert , United States Department of Justice, Environment & Natural Resources Division, Washington, D.C., Robert G. Dreher , Acting Assistant Attorney General, United States Department of Justice, Environment & Natural Resources Division, Washington, D.C.; M. Lea Anderson , of Counsel, United States Environmental Protection Agency, Washington, D.C.; Matthew C. Marks , Of Counsel, United States Environmental Protection Agency, Washington, D.C.; Brian Tomasovic , Of Counsel, United States Environmental Protection Agency, Dallas, TX; Sara L. Laumann , of Counsel, United States Environmental Protection Agency, Denver, CO, with her on the brief), for Respondent.

E. Blain Rawson , Ray Quinney & Nebeker, P.C., Salt Lake City, UT ( Emily Smith Loeffler , Quinney & Nebeker, P.C., Salt Lake City, UT, Michael G. Jenkins , Assistant General Counsel, PacifiCorp Energy with him on the brief), for Intervenor PacifiCorp Energy.

Matthias L. Sayer , Assistant Attorney General, Wyoming Office of Attorney General, Cheyenne, WY ( Jay A. Jerde , Deputy Attorney General, Wyoming Office of Attorney General, Cheyenne, WY, with him on the brief), for Intervenor State of Wyoming.

Christopher L. Colclasure , Holland & Hart LLP, Denver, CO, for Intervenor Basin Electric Power Cooperative.

Richard L. Alvidrez and Robert H. Clark , Miller Stratvert P.A., Albuquerque, NM; Kallie H. Kuehl , Corporate Counsel, Albuquerque, NM, on the brief for Intervenor Public Service Company of New Mexico.

Jeffrey M. Kendall , General Counsel and William G. Grantham , Assistant General Counsel, for New Mexico Environment Department, on the brief for Intervenor New Mexico Environment Department.

Carol Parker , Assistant City Attorney and Adelia W. Kearny , Deputy City Attorney, Albuquerque, NM, on the brief for Intervenor City of Albuquerque.

H. Michael Keller and Mary Jane E. Galvin-Wagg , Van Cott , Salt Lake City, UT; Mason Baker , General Counsel, Salt Lake City, UT, on the brief for Intervenor Utah Associated Municipal Power Systems.

John E. Swallow , Utah Attorney General and Christian C. Stephens , Assistant Attorney General, Salt Lake City, UT; Craig W. Anderson , Division Chief and Assistant Attorney General, Environment Division, Utah Attorney General's Office, Salt Lake City, UT, on the brief for Intervenor Utah Division of Air Quality.

Paul M. Seby and Marian C. Larsen , Seby Larsen LLP, Denver, CO, on the brief for Amicus Curiae American Coalition for Clean Coal Electricity.

Before BACHARACH, SEYMOUR, and MURPHY, Circuit Judges.