Producers of Coal Combustion Products

AES Corporation Alliant Energy Ameren Energy American Electric Power Colorado Springs Utilities Constellation Energy Dairyland Power Cooperative DetroitEdison Duke Energy Dynegy E.ON U.S. Services Exelon Generation Co. FirstEnergy Corp. Great River Energy

Kansas City Power & Light Lower Colorado River Authority Midwest Generation LLC Mirant Mid-Atlantic Montana-Dakota Utilities Co. Muscatine Power & Water Nebraska Public Power District Platte River Power Authority Progress Energy PPL Generation, LLC    Public Service Enterprise Group Public Service of New Hampshire Reliant Energy, Inc.

Seminole Electric South Carolina Electric & Gas Southern Company Southern Illinois Power Cooperative Sunflower Electric Corporation Tampa Electric Company Tennessee Valley Authority TransAlta Corporation We Energies Wolverine Power Supply Cooperative Xcel Energy