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Petroleum and coal products

    Name
      Primary Industry
City
    Calumet Specialty Products Partners, L.P. Great Falls
Petroleum Refineries
    Century Companies, Inc. Lewistown
Asphalt Paving Mixture and Block Manufacturing
    CHS Inc. Laurel
Petroleum Refineries
    ExxonMobil Billings
Petroleum Refineries
    Koch Materials Company Billings
Asphalt Paving, Roofing, and Saturated Materials Manufacturing
    Phillips 66 Billings
Petroleum Refineries