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Agave Energy Company
ASARCO
Ash Grove Cement
Barretts Minerals
Basin Electric Cooperative.
Billings Generation Inc.
Cenex Harvest
Columbia Falls Aluminum
Conoco, Inc.
ExxonMobil
F.H. Stoltze Land & Lumber
Graymont Western U.S.
Hess Corporation
Holcim (US) Inc.
Idaho State University
Luzenac America
Malstrom Air Force Base
Montana Refining Co.
Montana State University
MT Sulphur & Chemical Co.
Southern MT Electric G&T
NorthWestern Energy
Plum Creek Timber Co.
PPL Montana
Rosebud Energy
Roseburg Forest Products
Smurfit-Stone Container Enterprises
Stimson Lumber
Westmoreland Resources
Western Gas Resources
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