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Montana Department of Environmental Quality, Air Resources Management Bureau records, 1965-2001

Overview of the Collection

Creartor
Montana. Department of Environmental Quality
Title
Montana Department of Environmental Quality, Air Resources Management Bureau records
Dates
1965-2001 (inclusive)
Quantity
19.4 linear feet
Collection Number
RS 494 (Formerly RS 435)
Summary
This collection is a sub-subgroup (Bureau) of the Montana Department of Environmental Quality records. The Air Quality Bureau (formerly named Air Resources Management Bureau) currently operates within the Air, Energy, and Mining Division. Please see the primary finding aid for more Montana Department of Environmental Quality records. These records (1965-2001) include correspondence, case files, hearing transcripts, and subject files.
Repository
Montana Historical Society, Library & Archives
Montana Historical Society Research Center Archives
225 North Roberts
PO Box 201201
Helena MT
59620-1201
Telephone: 4064442681
Fax: 4064445297
mhslibrary@mt.gov
Access Restrictions

Collection open for research.

Languages
English
Sponsor
Funding for encoding this finding aid was provided through a grant awarded by the National Historical Publications and Records Commission (NHPRC)
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Historical Note

In 1971, the State Department of Health became the Department of Health and Environmental Sciences (DHES) with the passage of Governor Anderson’s Executive Reorganization Order 9-71. The Environmental Sciences Division remained part of DHES from that date until 1990, during which time they were responsible for monitoring air quality and water quality, solid waste management, administering the Subdivision Bureau, ensuring food and consumer safety, and occupational health. In 1991, though still a part of the Department of Health and Environmental Sciences, the role of the Environmental Sciences Division was considerably expanded to include: Natural Resource Damage Assessment, a Petroleum Tank Release Compensation Board, a Superfund Section, and an Underground Storage Tanks Section. The Environmental Sciences Division became its own separate department, renamed the Department of Environmental Quality, in 1995, and was comprised of the following divisions: Director’s Office, Air Quality, Centralized Services, Energy, Environmental Remediation, Reclamation, Waste Management, and Water Quality. Currently, the Montana Department of Environmental Quality (DEQ) is comprised of seven divisions: the Director’s Office, Enforcement, Financial Services, Information Technology, Permitting and Compliance, Planning, Prevention, and Assistance, and Remediation.

The functions of the Air Resources Management Bureau were originally covered by the Air Quality Bureau under the umbrella of the Environmental Services Division within DHES. After the creation of the DEQ in 1995, the Air Quality Bureau became the Air and Waste Management Bureau, functioning under the Permitting and Compliance Division and comprised of the Air Permitting and Air Compliance offices. The Air and Waste Management Bureau became the Air Resources Management Bureau (ARMB) in the early 2000s.

The ARMB remained under the umbrella of the Permitting and Compliance Division (defunct) until sometime prior to 2024. The ARMB regulated air emissions through permitting and compliance activities. This mandate included: issuing air quality pre-construction and operating permits; inspecting and providing compliance assistance for air emission sources; issuing permits for open burning activities; and coordinating operation of the Montana Smoke Management Program with the major open burning entities. As of 2024, the Air Resources Management Bureau has been replaced with the Air Quality Bureau, which operates within the Air, Energy, and Mining Division of DEQ.

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Content Description

This collection is composed of correspondence, case files, hearing transcripts, and subject files. The correspondence series is comprised mostly of correspondence between the AQB/ARMB and the Environmental Protection Agency, and correspondence in regards to State Implementation Plans to deal with air pollution in various cities, including Anaconda, Butte, East Helena, Libby, Missoula, and Whitefish. The Case Files series is alphabetized by company, and deals primarily with permitting and compliance. The Hearings series is comprised of transcripts of hearings for air quality cases between 1977 and 2000. Hearings revolve primarily around the adoption of air quality rules. The highlights of the Subject Files series are folders dealing with the EPA’s Clean Air Act of 1990, citations and complaints for emissions violations, and air quality quarterly contract reports by county (not all counties are represented).

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Use of the Collection

Restrictions on Use

Researchers must use collection in accordance with the policies of the Montana Historical Society. The Society does not necessarily hold copyright to all materials in the collection. In some cases permission for use may require additional authorization from the copyright owners. For more information contact an archivist.

Preferred Citation

Item description and date. Collection Title. Collection Number. Box and Folder numbers. Montana Historical Society Library & Archives, Helena, Montana.

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Administrative Information

Arrangement

Arrangement is by series.

Location of Collection

43:1-5

Processing Note

In 2024, the various collections of the Montana Department of Environmental Quality were integrated under one collection identifier, RS 494, in order to help facilitate access, reduce redundancy in the MTHS catalog, and to follow best archival practices.

Collections from Montana Department of Environmental Quality's various Divisions and Bureaus that were previously treated as separate entities are now integrated into this collection, RS 494. Rather than reprocessing over 150 linear feet of DEQ materials, MTHS staff decided to keep the past arrangement of those collections/finding aids, and provide access to them via links through the central finding aid. This decision has allowed the MTHS archival staff to maintain intellectual control over the collection, while removing the need to reprocess it. It also keeps State Agency finding aids at manageable sizes. Please read the scope and content note carefully to determine if this subgroup/sub-subgroup pertains to your research needs.

Acquisition Information

Acquisition information available upon request

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Detailed Description of the Collection

Detailed Description of the Collection

  • Correspondence

    • Description: Air Quality Bureau (AQB), Billings Sulfur Dioxide (SO2)
      Dates: 1985-1994
      Container: Box/Folder 1 / 1-16
      Location: Correspondence
    • Description: AQB, Contracts – General
      Dates: 1991-1993
      Container: Box/Folder 2 / 1-3
      Location: Correspondence
    • Description: AQB, Contracts – Policies and Procedures
      Dates: 1989-1992
      Container: Box/Folder 2 / 4
      Location: Correspondence
    • Description: AQB, Contracts – Butte/Silver Bow
      Dates: 1996
      Container: Box/Folder 2 / 5
      Location: Correspondence
    • Description: AQB, Contracts – Lewis and Clark County
      Dates: 1995
      Container: Box/Folder 2 / 6
      Location: Correspondence
    • Description: AQB, Contracts – Lincoln County
      Dates: 1991-1992
      Container: Box/Folder 2 / 7
      Location: Correspondence
    • Description: AQB, Contracts – Cascade County
      Dates: 1996
      Container: Box/Folder 2 / 8
      Location: Correspondence
    • Description: AQB, Contracts –Flathead County
      Dates: 1995-1996
      Container: Box/Folder 2 / 9
      Location: Correspondence
    • Description: AQB, Contracts – Missoula County
      Dates: FY 1995
      Container: Box/Folder 2 / 10
      Location: Correspondence
    • Description: AQB, Contracts – Ravalli County
      Dates: 1994
      Container: Box/Folder 2 / 11
      Location: Correspondence
    • Description: AQB, Contracts – Yellowstone County
      Dates: 1995
      Container: Box/Folder 2 / 12
      Location: Correspondence
    • Description: AQB, Poplar River Study
      Dates: 1988-1994
      Container: Box/Folder 2 / 13
      Location: Correspondence
    • Description: AQB, Miscellaneous
      Dates: 1983-1991
      Container: Box/Folder 2 / 14
      Location: Correspondence
    • Description: AQB, “Transportation Conformity”
      Dates: 1991-1993
      Container: Box/Folder 2 / 15
      Location: Correspondence
    • Description: AQB, Tribal Assistance – All tribes
      Dates: 1983-1984
      Container: Box/Folder 2 / 16-17
      Location: Correspondence
    • Description: AQB, Tribal Assistance – Crow Reservation
      Dates: 1981-1991
      Container: Box/Folder 2 / 18
      Location: Correspondence
    • Description: AQB, Tribal Assistance – Flathead Reservation
      Dates: 1981-1992
      Container: Box/Folder 2 / 19
      Location: Correspondence
    • Description: AQB, Tribal Assistance – Fort Belknap Reservation
      Dates: 1982-1990
      Container: Box/Folder 2 / 20
      Location: Correspondence
    • Description: AQB, Tribal Assistance – Fort Peck Reservation
      Dates: 1989-1992
      Container: Box/Folder 2 / 21
      Location: Correspondence
    • Description: AQB, Tribal Assistance – N. Cheyenne Reservation
      Dates: 1983-1984
      Container: Box/Folder 2 / 22
      Location: Correspondence
    • Description: Environmental Protection Agency (EPA), Air and Hazardous Materials
      Dates: 1974-1978
      Container: Box/Folder 2 / 23
      Location: Correspondence
    • Description: EPA, Air Quality Plan and Standards
      Dates: 1976-1995
      Container: Box/Folder 2 / 24
      Location: Correspondence
    • Description: EPA, Air Quality Maintenance Areas
      Dates: 1974-1978
      Container: Box/Folder 2 / 25
      Location: Correspondence
    • Description: EPA, Applicability Determination Index (ADI)
      Dates: 1993
      Container: Box/Folder 2 / 26
      Location: Correspondence
    • Description: EPA, “BOA Projects”
      Dates: 1975
      Container: Box/Folder 2 / 27
      Location: Correspondence
    • Description: EPA, CORE Program
      Dates: 1988
      Container: Box/Folder 2 / 28
      Location: Correspondence
    • Description: EPA, Emissions Trading
      Dates: 1982-1986
      Container: Box/Folder 2 / 29
      Location: Correspondence
    • Description: EPA, Enforcement Division
      Dates: 1972-1979
      Container: Box/Folder 2 / 30
      Location: Correspondence
    • Description: EPA, “Enforcement/Significant Violators”
      Dates: 1988-1989
      Container: Box/Folder 3 / 1
      Location: Correspondence
    • Description: EPA, Federal Facilities Compliance
      Dates: 1973-1976
      Container: Box/Folder 3 / 2
      Location: Correspondence
    • Description: EPA, Fuels
      Dates: 1993-1994
      Container: Box/Folder 3 / 3
      Location: Correspondence
    • Description: EPA, Health Risk Assessments
      Dates: 1991-1992
      Container: Box/Folder 3 / 4
      Location: Correspondence
    • Description: EPA, Implementation Plan
      Dates: 1971-1977
      Container: Box/Folder 3 / 5
      Location: Correspondence
    • Description: EPA, “Indirect Sources” (regulations)
      Dates: 1973-1975
      Container: Box/Folder 3 / 6
      Location: Correspondence
    • Description: EPA, Inspection Targeting Programs
      Dates: 1988-1989
      Container: Box/Folder 3 / 7
      Location: Correspondence
    • Description: EPA, Miscellaneous
      Dates: 1971-1995
      Container: Box/Folder 3 / 8-12
      Location: Correspondence
    • Description: EPA, Montana Emissions Inventory
      Dates: 1971-1976
      Container: Box/Folder 3 / 13
      Location: Correspondence
    • Description: EPA, Montana Operations Office
      Dates: 1978-1992
      Container: Box/Folder 3 / 14-15
      Location: Correspondence
    • Description: EPA, National Acid Precipitation Assessment Program (NAPAP)
      Dates: 1981-1989
      Container: Box/Folder 3 / 16
      Location: Correspondence
    • Description: EPA, National Air Toxics Information Clearing- house (NATICH)
      Dates: undated
      Container: Box/Folder 3 / 17
      Location: Correspondence
    • Description: EPA, National Emission Standards for Hazardous Air Pollutants (NESHAPS)
      Dates: 1976-1984
      Container: Box/Folder 3 / 18
      Location: Correspondence
    • Description: EPA, NESHAPS (Asbestos)
      Dates: 1985-1992
      Container: Box/Folder 4 / 1
      Location: Correspondence
    • Description: EPA, New Source Performance Standards (NSPS)
      Dates: 1971-1995
      Container: Box/Folder 4 / 2-5
      Location: Correspondence
    • Description: EPA, Pollution Prevention Program
      Dates: 1992
      Container: Box/Folder 4 / 6
      Location: Correspondence
    • Description: EPA, Prevention of Significant Deterioration
      Dates: 1967-1982
      Container: Box/Folder 4 / 7
      Location: Correspondence
    • Description: EPA, Quality Assurance Branch
      Dates: 1978-1979
      Container: Box/Folder 4 / 8
      Location: Correspondence
    • Description: EPA, Standards
      Dates: 1971-1977
      Container: Box/Folder 4 / 9
      Location: Correspondence
    • Description: EPA, State-EPA Agreements (SEAs) and Reports
      Dates: 1988-1993
      Container: Box/Folder 4 / 10-11
      Location: Correspondence
    • Description: EPA, Superfund
      Dates: 1984-1987
      Container: Box/Folder 4 / 12
      Location: Correspondence
    • Description: EPA, Surveillance and Analysis Division
      Dates: 1975-1982
      Container: Box/Folder 4 / 13
      Location: Correspondence
    • Description: EPA, Toxic Substances Control Act
      Dates: 1977-1978
      Container: Box/Folder 4 / 14
      Location: Correspondence
    • Description: EPA, Transportation Planning 109 (j)
      Dates: 1975-1977
      Container: Box/Folder 4 / 15
      Location: Correspondence
    • Description: EPA, National Air Audit System (NAAS)
      Dates: 1986-1989
      Container: Box/Folder 4 / 16
      Location: Correspondence
    • Description: EPA, Superfund (Toxic Chemical Release)
      Dates: 1989-1990
      Container: Box/Folder 4 / 17
      Location: Correspondence
    • Description: EPA, Volatile Organic Compounds
      Dates: 1989-1990
      Container: Box/Folder 4 / 18
      Location: Correspondence
    • Description: EPA, “Oversight by Region VIII”
      Dates: 1988-1989
      Container: Box/Folder 4 / 19
      Location: Correspondence
    • Description: EPA, “Visibility”
      Dates: 1979-1995
      Container: Box/Folder 4 / 20
      Location: Correspondence
    • Description: State Implementation Plan (SIP), General (includes Sulfur Dioxide and revisions)
      Dates: 1978-1994
      Container: Box/Folder 5 / 1-16
      Location: Correspondence
    • Description: SIP, General
      Dates: 1994
      Container: Box/Folder 6 / 1
      Location: Correspondence
    • Description: SIP, Anaconda SO2
      Dates: 1979-1982
      Container: Box/Folder 6 / 2
      Location: Correspondence
    • Description: SIP, Billings
      Dates: 1978-1989
      Container: Box/Folder 6 / 3
      Location: Correspondence
    • Description: SIP, Butte
      Dates: 1978-1993
      Container: Box/Folder 6 / 4-7
      Location: Correspondence
    • Description: SIP, Columbia Falls and Kalispell PM-10
      Dates: 1988-1992
      Container: Box/Folder 6 / 8-9
      Location: Correspondence
    • Description: SIP, East Helena Lead
      Dates: 1978-1989
      Container: Box/Folder 6 / 10-12
      Location: Correspondence
    • Description: SIP, East Helena Lead
      Dates: 1989-1996
      Container: Box/Folder 7 / 1-2
      Location: Correspondence
    • Description: SIP, East Helena PM-10
      Dates: 1988-1991
      Container: Box/Folder 7 / 3-5
      Location: Correspondence
    • Description: SIP, Great Falls
      Dates: 1981-1992
      Container: Box/Folder 7 / 6-8
      Location: Correspondence
    • Description: SIP, Kalispell
      Dates: 1993
      Container: Box/Folder 7 / 9
      Location: Correspondence
    • Description: SIP, Kalispell PM-10
      Dates: 1986-1993
      Container: Box/Folder 7 / 10-14
      Location: Correspondence
    • Description: SIP, Libby PM-10
      Dates: 1984-1990
      Container: Box/Folder 7 / 15-19
      Location: Correspondence
    • Description: SIP, Libby PM-10
      Dates: 1991-1992
      Container: Box/Folder 8 / 1-2
      Location: Correspondence
    • Description: SIP, Missoula PM-10
      Dates: 1988-1993
      Container: Box/Folder 8 / 3-5
      Location: Correspondence
    • Description: SIP, Missoula County
      Dates: 1978-1991
      Container: Box/Folder 8 / 6-10
      Location: Correspondence
    • Description: SIP, Thompson Falls PM-10
      Dates: 1990-1992
      Container: Box/Folder 8 / 11
      Location: Correspondence
    • Description: SIP, Whitefish PM1-10
      Dates: 1992-1993
      Container: Box/Folder 8 / 12-13
      Location: Correspondence
    • Description: Air Quality, Montana Air Pollution Grant
      Dates: 1995-1996
      Container: Box/Folder 9 / 1
      Location: Correspondence
    • Description: Air Toxics, Emissions Inventories and Monitoring Air Toxics, Emissions Inventories and Monitoring
      Dates: 1986-1994
      Container: Box/Folder 9 / 2
      Location: Correspondence
    • Description: Air Toxics, Remediation and 33 / 50
      Dates: 1990-1992
      Container: Box/Folder 9 / 3
      Location: Correspondence
    • Description: Alberta, Province of
      Dates: 1986
      Container: Box/Folder 9 / 4
      Location: Correspondence
    • Description: American Society for Testing and Materials
      Dates: 1984-1986
      Container: Box/Folder 9 / 5
      Location: Correspondence
    • Description: Butte/Silver Bow Government
      Dates: 1982-1983
      Container: Box/Folder 9 / 6
      Location: Correspondence
    • Description: Complaints (re: air quality)
      Dates: 1991
      Container: Box/Folder 9 / 7
      Location: Correspondence
    • Description: County Air Pollution Programs
      Dates: 1978-1992
      Container: Box/Folder 9 / 8
      Location: Correspondence
    • Description: Department of Agriculture, Forest Service
      Dates: 1970-1991
      Container: Box/Folder 9 / 9
      Location: Correspondence
    • Description: DHES, Director’s Office
      Dates: 1994-1995
      Container: Box/Folder 9 / 10
      Location: Correspondence
    • Description: DHES Reorganization
      Dates: 1994-1995
      Container: Box/Folder 9 / 11
      Location: Correspondence
    • Description: Department of the Interior, Bureau of Land Management
      Dates: 1975-1987
      Container: Box/Folder 9 / 12
      Location: Correspondence
    • Description: Flathead County Air Pollution Control Program
      Dates: 1992
      Container: Box/Folder 9 / 13
      Location: Correspondence
    • Description: Gallatin County Air Pollution Control
      Dates: 1985-1993
      Container: Box/Folder 9 / 14
      Location: Correspondence
    • Description: Governor’s Office (includes Coal Task Force, and Reports)
      Dates: 1969-1984
      Container: Box/Folder 9 / 15-17
      Location: Correspondence
    • Description: “Korean Dry Cleaning Rule” (dry cleaning Emissions rule translated into Korean)
      Dates: 1993
      Container: Box/Folder 9 / 18
      Location: Correspondence
    • Description: Legislation
      Dates: 1985-1993
      Container: Box/Folder 9 / 19-21
      Location: Correspondence
    • Description: Legislation
      Dates: 1995-1997
      Container: Box/Folder 10 / 1
      Location: Correspondence
    • Description: Lewis and Clark County
      Dates: 1983-1996
      Container: Box/Folder 10 / 2
      Location: Correspondence
    • Description: Missoula County Air Pollution Control
      Dates: 1986-1995
      Container: Box/Folder 10 / 3-4
      Location: Correspondence
    • Description: Montana Coal Council
      Dates: 1978-1987
      Container: Box/Folder 10 / 5
      Location: Correspondence
    • Description: Montana, Department of State Lands
      Dates: 1980-1993
      Container: Box/Folder 10 / 6
      Location: Correspondence
    • Description: Montana, Environmental Quality Council
      Dates: 1985-1996
      Container: Box/Folder 10 / 7-8
      Location: Correspondence
    • Description: Montana Environmental Policy Act
      Dates: 1971-1994
      Container: Box/Folder 10 / 9
      Location: Correspondence
    • Description: “Montana, State of”
      Dates: 1978-1992
      Container: Box/Folder 10 / 10
      Location: Correspondence
    • Description: North Dakota regulations
      Dates: 1976-1994
      Container: Box/Folder 10 / 11
      Location: Correspondence
    • Description: Transportation Conformity Work Group
      Dates: 1994
      Container: Box/Folder 10 / 12
      Location: Correspondence
    • Description: Tribal Air Quality Programs
      Dates: 1979-1992
      Container: Box/Folder 10 / 13
      Location: Correspondence
    • Description: Tribal Implementation Plan (TIP), N. Cheyenne Reservation
      Dates: 1991
      Container: Box/Folder 10 / 14
      Location: Correspondence

  • Case Files

    • Description: Allied Paving Corporation Permits
      Dates: 1976
      Container: Box/Folder 11 / 1
      Location: Case Files
    • Description: Alpine Asphalt and Building Permits
      Dates: 1984
      Container: Box/Folder 11 / 2
      Location: Case Files
    • Description: American Asphalt Permits
      Dates: 1973-1984
      Container: Box/Folder 11 / 3
      Location: Case Files
    • Description: American Chemet Corporation
      Dates: 1973-1981
      Container: Box/Folder 11 / 4
      Location: Case Files
    • Description: American Stud Company
      Dates: 1976, 1980
      Container: Box/Folder 11 / 5
      Location: Case Files
    • Description: American Timber
      Dates: 1970
      Container: Box/Folder 11 / 6
      Location: Case Files
    • Description: ASARCO – Black Pine & East Helena
      Dates: 1973-1981
      Container: Box/Folder 11 / 7
      Location: Case Files
    • Description: Ash Grove Cement Company
      Dates: 1969-1977
      Container: Box/Folder 11 / 8
      Location: Case Files
    • Description: Associated Asphalt Permits
      Dates: 1969-1972
      Container: Box/Folder 11 / 9
      Location: Case Files
    • Description: B and N Construction Permits
      Dates: 1979
      Container: Box/Folder 11 / 10
      Location: Case Files
    • Description: Barton Construction
      Dates: 1969
      Container: Box/Folder 11 / 11
      Location: Case Files
    • Description: Bartrusch Construction Permits
      Dates: 1969-1999
      Container: Box/Folder 11 / 12-13
      Location: Case Files
    • Description: Big Sky Construction
      Dates: 1973
      Container: Box/Folder 11 / 14
      Location: Case Files
    • Description: Big Sky Ready Mix
      Dates: 1973
      Container: Box/Folder 11 / 15
      Location: Case Files
    • Description: Black Eagle Paving
      Dates: 1969-1971
      Container: Box/Folder 11 / 16
      Location: Case Files
    • Description: Blahnik Construction
      Dates: 1983
      Container: Box/Folder 11 / 17
      Location: Case Files
    • Description: Bonneville Power
      Dates: 1983
      Container: Box/Folder 11 / 18
      Location: Case Files
    • Description: Border States Paving
      Dates: 1982
      Container: Box/Folder 11 / 19
      Location: Case Files
    • Description: Bozeman Sand and Gravel
      Dates: 1984
      Container: Box/Folder 11 / 20
      Location: Case Files
    • Description: Brasel and Sims Construction
      Dates: 1973
      Container: Box/Folder 11 / 21
      Location: Case Files
    • Description: Butte Silver Bow Asphalt
      Dates: 1981
      Container: Box/Folder 11 / 22
      Location: Case Files
    • Description: Butte Silver Bow Asphalt
      Dates: 1983
      Container: Box/Folder 11 / 23
      Location: Case Files
    • Description: Buttrey Foods (Billings – Wolf Point)
      Dates: 1970
      Container: Box/Folder 11 / 24
      Location: Case Files
    • Description: Centennial Asphalt
      Dates: 1981
      Container: Box/Folder 11 / 25
      Location: Case Files
    • Description: Central Paving
      Dates: 1970-1971
      Container: Box/Folder 11 / 26
      Location: Case Files
    • Description: Century Construction
      Dates: 1981
      Container: Box/Folder 11 / 27
      Location: Case Files
    • Description: Century Paving
      Dates: 1979-1984
      Container: Box/Folder 11 / 28
      Location: Case Files
    • Description: CHS Inc., Laurel refinery
      Dates: 1968, 1977
      Container: Box/Folder 11 / 29
      Location: Case Files
    • Description: Clark Brothers Construction
      Dates: 1979-1984
      Container: Box/Folder 11 / 30
      Location: Case Files
    • Description: Columbia Falls Aluminum Company
      Dates: 1976-1982
      Container: Box/Folder 11 / 31
      Location: Case Files
    • Description: Columbia Falls Aluminum Company
      Dates: 1983
      Container: Box/Folder 11 / 32
      Location: Case Files
    • Description: Conoco Phillips Company, Billings refinery
      Dates: 1970-1982
      Container: Box/Folder 11 / 33
      Location: Case Files
    • Description: Construction Supply Inc.
      Dates: 1974
      Container: Box/Folder 11 / 34
      Location: Case Files
    • Description: COP Construction
      Dates: 1980
      Container: Box/Folder 11 / 35
      Location: Case Files
    • Description: Cyprus Industrial Minerals Company (Luzenac International)
      Dates: 1970
      Container: Box/Folder 11 / 36
      Location: Case Files
    • Description: Decker Coal Company
      Dates: 1980-1981
      Container: Box/Folder 11 / 37
      Location: Case Files
    • Description: Deer Lodge County
      Dates: 1970-1984
      Container: Box/Folder 11 / 38
      Location: Case Files
    • Description: Devon Energy Production
      Dates: 1981
      Container: Box/Folder 11 / 39
      Location: Case Files
    • Description: Diamond National Corp
      Dates: 1970
      Container: Box/Folder 11 / 40
      Location: Case Files
    • Description: Doeden Construction
      Dates: 1971
      Container: Box/Folder 11 / 41
      Location: Case Files
    • Description: Dugdale Construction
      Dates: 1971
      Container: Box/Folder 11 / 42
      Location: Case Files
    • Description: Duinick Brothers and Gilchrist
      Dates: 1979-1984
      Container: Box/Folder 11 / 43
      Location: Case Files
    • Description: Earth Builders
      Dates: 1975-1979
      Container: Box/Folder 11 / 44
      Location: Case Files
    • Description: Echart Construction
      Dates: 1984
      Container: Box/Folder 11 / 45
      Location: Case Files
    • Description: Empire Sand and Gravel
      Dates: 1979-1984
      Container: Box/Folder 11 / 46
      Location: Case Files
    • Description: Ennis Sand and Gravel
      Dates: 1978
      Container: Box/Folder 11 / 47
      Location: Case Files
    • Description: Exxon Mobil, Billings refinery
      Dates: 1971-1984
      Container: Box/Folder 11 / 48-50
      Location: Case Files
    • Description: F and S Construction
      Dates: 1969
      Container: Box/Folder 11 / 51
      Location: Case Files
    • Description: F.H. Stoltze Land and Lumber Company
      Dates: 1971
      Container: Box/Folder 11 / 52
      Location: Case Files
    • Description: F.L. Flynn and Company
      Dates: 1972
      Container: Box/Folder 11 / 53
      Location: Case Files
    • Description: Faust Construction
      Dates: 1983
      Container: Box/Folder 11 / 54
      Location: Case Files
    • Description: Felton Construction
      Dates: 1980
      Container: Box/Folder 11 / 55
      Location: Case Files
    • Description: Fergus County
      Dates: 1976
      Container: Box/Folder 11 / 56
      Location: Case Files
    • Description: Figgins Sand and Gravel
      Dates: 1983
      Container: Box/Folder 11 / 57
      Location: Case Files
    • Description: Fisher Sand and Gravel
      Dates: 1974-1994
      Container: Box/Folder 11 / 58
      Location: Case Files
    • Description: Flathead County
      Dates: 1970-1971
      Container: Box/Folder 11 / 59
      Location: Case Files
    • Description: Francis Muggli
      Dates: 1972-1982
      Container: Box/Folder 12 / 1
      Location: Case Files
    • Description: Francis Muggli
      Dates: 1971-1985
      Container: Box/Folder 12 / 2
      Location: Case Files
    • Description: Francis Tindall Construction
      Dates: 1970-1979
      Container: Box/Folder 12 / 3
      Location: Case Files
    • Description: Gallatin County Road Development
      Dates: 1983-1984
      Container: Box/Folder 12 / 4
      Location: Case Files
    • Description: Genesis Inc., Troy mine
      Dates: 1979-1982
      Container: Box/Folder 12 / 5
      Location: Case Files
    • Description: Gilman Excavating
      Dates: 1978
      Container: Box/Folder 12 / 6
      Location: Case Files
    • Description: Gilman Excavating
      Dates: 1971-1985
      Container: Box/Folder 12 / 7
      Location: Case Files
    • Description: Gladstone Crushing and Construction
      Dates: 1982
      Container: Box/Folder 12 / 8
      Location: Case Files
    • Description: Gladstone Cushing and Construction
      Dates: 1983
      Container: Box/Folder 12 / 9
      Location: Case Files
    • Description: Golden Sunlight Mines (Plasar Annex Inc.)
      Dates: 1982
      Container: Box/Folder 12 / 10
      Location: Case Files
    • Description: Grant Construction Co.
      Dates: 1972
      Container: Box/Folder 12 / 11
      Location: Case Files
    • Description: Graymont Western US (Continental Lime)
      Dates: 1980-1982
      Container: Box/Folder 12 / 12
      Location: Case Files
    • Description: Graymont Western US Inc.
      Dates: 1983
      Container: Box/Folder 12 / 13
      Location: Case Files
    • Description: Gypsy Highview Gathering
      Dates: 1982
      Container: Box/Folder 12 / 14
      Location: Case Files
    • Description: Helena Sand and Gravel
      Dates: 1973
      Container: Box/Folder 12 / 15
      Location: Case Files
    • Description: Helena Sand and Gravel
      Dates: 1975
      Container: Box/Folder 12 / 16
      Location: Case Files
    • Description: Henzel – Phelps Joint Venture
      Dates: 1971
      Container: Box/Folder 12 / 17
      Location: Case Files
    • Description: Hexion Specialty Chemical (Border Chemical)
      Dates: 1970
      Container: Box/Folder 12 / 18
      Location: Case Files
    • Description: Hilde – Maronick Joint Venture
      Dates: 1974-1976
      Container: Box/Folder 12 / 19
      Location: Case Files
    • Description: Hilde Construction
      Dates: 1969-1974
      Container: Box/Folder 12 / 20
      Location: Case Files
    • Description: Hilde Construction
      Dates: 1975-1977
      Container: Box/Folder 12 / 21
      Location: Case Files
    • Description: Hilde Construction
      Dates: 1978-1980
      Container: Box/Folder 12 / 22
      Location: Case Files
    • Description: Hilde Construction
      Dates: 1981-1982
      Container: Box/Folder 12 / 23
      Location: Case Files
    • Description: Hilde Construction
      Dates: 1984-1985
      Container: Box/Folder 12 / 24
      Location: Case Files
    • Description: Hilmar Asphalt
      Dates: 1973-1976
      Container: Box/Folder 12 / 25
      Location: Case Files
    • Description: Holland Construction
      Dates: 1968-1971
      Container: Box/Folder 12 / 26
      Location: Case Files
    • Description: Holnam Inc. (formerly Ideal Basic Industries)
      Dates: 1970-1983
      Container: Box/Folder 12 / 27
      Location: Case Files
    • Description: Inland Asphalt Co.
      Dates: 1971-1984
      Container: Box/Folder 12 / 28
      Location: Case Files
    • Description: J – B Company
      Dates: 1977
      Container: Box/Folder 12 / 29
      Location: Case Files
    • Description: James W. Zion
      Dates: 1971-1977
      Container: Box/Folder 12 / 30
      Location: Case Files
    • Description: Joe Mayo and Sons, Inc
      Dates: 1975-1976
      Container: Box/Folder 12 / 31
      Location: Case Files
    • Description: Kennaday Paving
      Dates: 1973
      Container: Box/Folder 12 / 32
      Location: Case Files
    • Description: King of Kings Mining
      Dates: 1983
      Container: Box/Folder 12 / 33
      Location: Case Files
    • Description: Knife River Corp.
      Dates: 1985
      Container: Box/Folder 12 / 34
      Location: Case Files
    • Description: Konitz Contracting
      Dates: 1979-1981
      Container: Box/Folder 12 / 35
      Location: Case Files
    • Description: Konitz Contracting
      Dates: 1979-1984
      Container: Box/Folder 12 / 36
      Location: Case Files
    • Description: Konitz Contracting
      Dates: 1985
      Container: Box/Folder 12 / 37
      Location: Case Files
    • Description: Kraling and Nelson Construction
      Dates: 1972
      Container: Box/Folder 12 / 38
      Location: Case Files
    • Description: Kraus Construction
      Dates: 1975-1980
      Container: Box/Folder 12 / 39
      Location: Case Files
    • Description: L.S. Jensen Construction
      Dates: 1982-1987
      Container: Box/Folder 12 / 40
      Location: Case Files
    • Description: L.W. Vail Company
      Dates: 1969-1972
      Container: Box/Folder 12 / 41
      Location: Case Files
    • Description: Lewis Construction
      Dates: 1970
      Container: Box/Folder 12 / 42
      Location: Case Files
    • Description: Lindteigen Construction
      Dates: 1969
      Container: Box/Folder 12 / 43
      Location: Case Files
    • Description: Lindteigen Construction
      Dates: 1970
      Container: Box/Folder 12 / 44
      Location: Case Files
    • Description: Long Construction
      Dates: 1973
      Container: Box/Folder 12 / 45
      Location: Case Files
    • Description: Long Construction
      Dates: 1978
      Container: Box/Folder 12 / 46
      Location: Case Files
    • Description: Lundy Center
      Dates: 1969-1970
      Container: Box/Folder 12 / 47
      Location: Case Files
    • Description: Luzenac America
      Dates: 1983
      Container: Box/Folder 12 / 48
      Location: Case Files
    • Description: M and M Ready Mix
      Dates: 1971
      Container: Box/Folder 12 / 49
      Location: Case Files
    • Description: Malmstrom Air Force Base
      Dates: 1981
      Container: Box/Folder 12 / 50
      Location: Case Files
    • Description: MarKovich Construction
      Dates: 1969-1984
      Container: Box/Folder 12 / 51
      Location: Case Files
    • Description: MarKovich Paving
      Dates: 1979-1980
      Container: Box/Folder 12 / 52
      Location: Case Files
    • Description: Marvin Rehbein Construction
      Dates: 1979-1980
      Container: Box/Folder 12 / 53
      Location: Case Files
    • Description: Marvin Rehbein Construction
      Dates: 1984-1985
      Container: Box/Folder 12 / 54
      Location: Case Files
    • Description: McAtee and Heathe
      Dates: 1969-1974
      Container: Box/Folder 12A / 1
      Location: Case Files
    • Description: McIntyre Construction
      Dates: 1971-1984
      Container: Box/Folder 12A / 2
      Location: Case Files
    • Description: McIntyre Construction
      Dates: 1979-1984
      Container: Box/Folder 12A / 3
      Location: Case Files
    • Description: McIntyre Construction
      Dates: 1979-1984
      Container: Box/Folder 12A / 4
      Location: Case Files
    • Description: Meyer Construction
      Dates: 1974-1977
      Container: Box/Folder 12A / 5
      Location: Case Files
    • Description: Meyer Construction
      Dates: 1978-1981
      Container: Box/Folder 12A / 6
      Location: Case Files
    • Description: Montana Power Company
      Dates: 1976-1979
      Container: Box/Folder 12A / 7
      Location: Case Files
    • Description: Montana Refining Company
      Dates: 1977-1982
      Container: Box/Folder 12A / 8
      Location: Case Files
    • Description: Montana-Dakota Utilities
      Dates: 1971, 1975
      Container: Box/Folder 12A / 9
      Location: Case Files
    • Description: Montana-Dakota Utilities, Glendive
      Dates: 1977, 1981
      Container: Box/Folder 12A / 10
      Location: Case Files
    • Description: Mortensen Construction
      Dates: 1977-1979
      Container: Box/Folder 12A / 11
      Location: Case Files
    • Description: Mountain States Energy
      Dates: 1980-1982
      Container: Box/Folder 12A / 12
      Location: Case Files
    • Description: Mountain States Energy
      Dates: 1983
      Container: Box/Folder 12A / 13
      Location: Case Files
    • Description: Mountain States Energy
      Dates: 1984
      Container: Box/Folder 12A / 14
      Location: Case Files
    • Description: Newman Construction
      Dates: 1981
      Container: Box/Folder 12A / 15
      Location: Case Files
    • Description: NFT Inc. and Association (Nilson Smith Construction)
      Dates: 1969-1974
      Container: Box/Folder 12A / 16
      Location: Case Files
    • Description: Nilson – Birch
      Dates: 1970
      Container: Box/Folder 12A / 17
      Location: Case Files
    • Description: Northern Improvement
      Dates: 1969-1985
      Container: Box/Folder 12A / 18
      Location: Case Files
    • Description: Northwest Engineering Co.
      Dates: 1969
      Container: Box/Folder 12A / 19
      Location: Case Files
    • Description: P.M. Berry Co.
      Dates: 1957
      Container: Box/Folder 12A / 20
      Location: Case Files
    • Description: Pack and Company (NUPAC)
      Dates: 1977
      Container: Box/Folder 12A / 21
      Location: Case Files
    • Description: Pack Concrete
      Dates: 1977
      Container: Box/Folder 12A / 22
      Location: Case Files
    • Description: Peter Kiewit Sons Co.
      Dates: 1968-1980
      Container: Box/Folder 12A / 23
      Location: Case Files
    • Description: Peter Kiewit Sons Co.
      Dates: 1971-1978
      Container: Box/Folder 12A / 24
      Location: Case Files
    • Description: Peter Kiewit Sons Co.
      Dates: 1982-1983
      Container: Box/Folder 12A / 25
      Location: Case Files
    • Description: Peter Kiewit Sons Co.
      Dates: 1983
      Container: Box/Folder 12A / 26
      Location: Case Files
    • Description: Plum Creek Manufacturing, Fortine
      Dates: 1969-1979
      Container: Box/Folder 12A / 27
      Location: Case Files
    • Description: Polk County Refuse District
      Dates: 1981
      Container: Box/Folder 12A / 28
      Location: Case Files
    • Description: R.A. Heintz Co.
      Dates: 1971
      Container: Box/Folder 12A / 29
      Location: Case Files
    • Description: Ranck Oil Company
      Dates: 1980
      Container: Box/Folder 12A / 30
      Location: Case Files
    • Description: Ranck Oil Company
      Dates: 1983
      Container: Box/Folder 12A / 31
      Location: Case Files
    • Description: Reeves Inc.
      Dates: 1979-1980
      Container: Box/Folder 12A / 32
      Location: Case Files
    • Description: Richardson Construction
      Dates: 1968-1972
      Container: Box/Folder 12A / 33
      Location: Case Files
    • Description: Robert Thornburg, Contractor
      Dates: 1982
      Container: Box/Folder 12A / 34
      Location: Case Files
    • Description: Robert Tindall
      Dates: 1971-1979
      Container: Box/Folder 12A / 35
      Location: Case Files
    • Description: Robert Tindall
      Dates: 1973-1975
      Container: Box/Folder 12A / 36
      Location: Case Files
    • Description: Rock Inc
      Dates: 1975-1976
      Container: Box/Folder 12A / 37
      Location: Case Files
    • Description: Rocky Mountain Biomass
      Dates: 1982
      Container: Box/Folder 12A / 38
      Location: Case Files
    • Description: Roseburg Forest Products, Missoula Particleboard
      Dates: 1976-1979
      Container: Box/Folder 12A / 39
      Location: Case Files
    • Description: R-Y Timber, Inc.
      Dates: 1974
      Container: Box/Folder 12A / 40
      Location: Case Files
    • Description: S. Birch Inc
      Dates: 1969-1970
      Container: Box/Folder 12A / 41
      Location: Case Files
    • Description: Schmidt Super Value Grocery
      Dates: 1975
      Container: Box/Folder 12A / 42
      Location: Case Files
    • Description: Sidney Sugars
      Dates: 1984
      Container: Box/Folder 12A / 43
      Location: Case Files
    • Description: Smurfit-Stone Container Enterprises
      Dates: 1970-1980
      Container: Box/Folder 12A / 44
      Location: Case Files
    • Description: Spring Creek Coal Company
      Dates: 1979
      Container: Box/Folder 12A / 45
      Location: Case Files
    • Description: State Bank Trust, Dillon
      Dates: 1974
      Container: Box/Folder 12A / 46
      Location: Case Files
    • Description: Stimson Lumber Company
      Dates: 1972-1975
      Container: Box/Folder 12A / 47
      Location: Case Files
    • Description: STS Gravel
      Dates: 1984
      Container: Box/Folder 12A / 48
      Location: Case Files
    • Description: Swan and Sons Construction
      Dates: 1985
      Container: Box/Folder 12A / 49
      Location: Case Files
    • Description: T-Bend Construction (was Hi-Line Asphalt)
      Dates: 1983
      Container: Box/Folder 12A / 50
      Location: Case Files
    • Description: Tongue River Lumber
      Dates: 1973-1977
      Container: Box/Folder 12B / 1
      Location: Case Files
    • Description: Tri-State Construction
      Dates: 1984
      Container: Box/Folder 12B / 2
      Location: Case Files
    • Description: United Materials of Great Falls (was Montana Sand and Gravel)
      Dates: 1970
      Container: Box/Folder 12B / 3
      Location: Case Files
    • Description: United Materials of Great Falls (was Northern Materials Co.)
      Dates: 1970
      Container: Box/Folder 12B / 4
      Location: Case Files
    • Description: United States Antimony Corp.
      Dates: 1970
      Container: Box/Folder 12B / 5
      Location: Case Files
    • Description: United States National Park Service
      Dates: 1974
      Container: Box/Folder 12B / 6
      Location: Case Files
    • Description: United States National Park Service
      Dates: 1981
      Container: Box/Folder 12B / 7
      Location: Case Files
    • Description: US Department of Health and Human Services, National Institute of Health (Rocky Mountain Labs)
      Dates: 1975
      Container: Box/Folder 12B / 8
      Location: Case Files
    • Description: Waleswood Inc.
      Dates: 1973
      Container: Box/Folder 12B / 9
      Location: Case Files
    • Description: Western Energy Co.
      Dates: 1984
      Container: Box/Folder 12B / 10
      Location: Case Files
    • Description: Western Energy Company
      Dates: 1978-1982
      Container: Box/Folder 12B / 11
      Location: Case Files
    • Description: Western Gas Resources
      Dates: 1982
      Container: Box/Folder 12B / 12
      Location: Case Files
    • Description: Western Materials
      Dates: 1977-1982
      Container: Box/Folder 12B / 13
      Location: Case Files
    • Description: Western Sugar Cooperative
      Dates: 1968-1982
      Container: Box/Folder 12B / 14
      Location: Case Files
    • Description: Western Vermiculite Company
      Dates: 1978-1980
      Container: Box/Folder 12B / 15
      Location: Case Files
    • Description: Westmoreland Resources
      Dates: 1973-1980
      Container: Box/Folder 12B / 16
      Location: Case Files
    • Description: Westmoreland Savage Mine
      Dates: 1982
      Container: Box/Folder 12B / 17
      Location: Case Files
    • Description: Westmoreland Savage Mine
      Dates: 1984
      Container: Box/Folder 12B / 18
      Location: Case Files
    • Description: Wheatland County
      Dates: 1973-1979
      Container: Box/Folder 12B / 19
      Location: Case Files
    • Description: William Collins, Inc.
      Dates: 1970-1972, 1978
      Container: Box/Folder 12B / 20
      Location: Case Files
    • Description: Williston Basin Interstate Pipeline Company
      Dates: 1972-1981
      Container: Box/Folder 12B / 21
      Location: Case Files

  • Hearings

    • Description: Transcripts (Anaconda, Air rules, Sulfur Dioxide)
      Dates: 1977-1980
      Container: Box/Folder 12B / 22-29
      Location: Hearings
    • Description: Transcripts
      Dates: 1980-2000
      Container: Box/Folder 13 / 1-12
      Location: Hearings

  • Subject Files

    • Description: Board of Health and Environmental Sciences, Miscellaneous
      Dates: 1967-1975
      Container: Box/Folder 13 / 13
      Location: Subject Files
    • Description: Environmental Protection Agency (EPA)
      Dates: 1996-2001
      Container: Box/Folder 13 / 14
      Location: Subject Files
    • Description: Air Quality Complaints list
      Dates: 1975-1994
      Container: Box/Folder 14 / 1
      Location: Subject Files
    • Description: Aronson Chicken Ranch (Rollins)
      Dates: 1975-1979
      Container: Box/Folder 14 / 2
      Location: Subject Files
    • Description: Asphalt Plants and Crushers
      Dates: 1988
      Container: Box/Folder 14 / 3
      Location: Subject Files
    • Description: Billings Regional Office
      Dates: 1975-1995
      Container: Box/Folder 14 / 4
      Location: Subject Files
    • Description: Broadus Airport, Environmental Assessment
      Dates: 1996
      Container: Box/Folder 14 / 5
      Location: Subject Files
    • Description: Clean Air Act of 1990
      Dates: 1987-1990
      Container: Box/Folder 14 / 6
      Location: Subject Files
    • Description: Clean Air Act Advisory Committee
      Dates: 1991-1994
      Container: Box/Folder 14 / 7
      Location: Subject Files
    • Description: EPA, Region VIII, Tall Stack Policy
      Dates: 1977
      Container: Box/Folder 14 / 8
      Location: Subject Files
    • Description: Rule Changes, Adopted
      Dates: 1984-1990
      Container: Box/Folder 14 / 9
      Location: Subject Files
    • Description: East Helena, Child Lead Study
      Dates: 1983-1990
      Container: Box/Folder 14 / 10-12
      Location: Subject Files
    • Description: Enforcement Program
      Dates: 1972-1976
      Container: Box/Folder 14 / 13
      Location: Subject Files
    • Description: EPA, Monthly Reports
      Dates: 1975-1977
      Container: Box/Folder 14 / 14
      Location: Subject Files
    • Description: EPA, Semi-annual Air Implementation Plan reports
      Dates: 1971-1974
      Container: Box/Folder 14 / 15
      Location: Subject Files
    • Description: “History of Air Pollution”
      Dates: 1969-1976
      Container: Box/Folder 14 / 16
      Location: Subject Files
    • Description: Inspection and Enforcement Program, Annual Report to EPA
      Dates: 1980-1985
      Container: Box/Folder 14 / 17
      Location: Subject Files
    • Description: Legislative Study Committee (Air Pollution Control)
      Dates: 1965
      Container: Box/Folder 14 / 18
      Location: Subject Files
    • Description: Open Burning Rule Changes
      Dates: 1975-1982
      Container: Box/Folder 14 / 19-20
      Location: Subject Files
    • Description: Air Permit Fees
      Dates: 1991-1994
      Container: Box/Folder 15 / 1
      Location: Subject Files
    • Description: Air Pollution Control Program, Anaconda Company report (re: concentrator tailings)
      Dates: 1972
      Container: Box/Folder 15 / 2
      Location: Subject Files
    • Description: AQB, Administrative Rules
      Dates: 1991-1996
      Container: Box/Folder 15 / 3-6
      Location: Subject Files
    • Description: AQB, Citations (re: emissions)
      Dates: 1987-1994
      Container: Box/Folder 15 / 7-8
      Location: Subject Files
    • Description: AQB, Complaints (re: emissions)
      Dates: 1992-1994
      Container: Box/Folder 15 / 9-10
      Location: Subject Files
    • Description: AQB, Contracts – Butte/Silver Bow through Lincoln County (quarterly reports)
      Dates: 1985-1996
      Container: Box/Folder 15 / 11-16
      Location: Subject Files
    • Description: AQB, Contracts – Yellowstone County (quarterly reports)
      Dates: 1991-1994
      Container: Box/Folder 16 / 1
      Location: Subject Files
    • Description: AQB, Fees
      Dates: 1973-1974
      Container: Box/Folder 16 / 2
      Location: Subject Files
    • Description: AQB, Hazardous/Medical Waste Incinerators
      Dates: 1991-1994
      Container: Box/Folder 16 / 3
      Location: Subject Files
    • Description: AQB, “Incinerators – Miscellaneous”
      Dates: 1968-1975
      Container: Box/Folder 16 / 4
      Location: Subject Files
    • Description: AQB, “Proposed Rules”
      Dates: 1975-1982
      Container: Box/Folder 16 / 5
      Location: Subject Files
    • Description: AQB, SIP – Annual Progress Reports
      Dates: undated
      Container: Box/Folder 16 / 6
      Location: Subject Files
    • Description: Air Quality Division (AQD), Contracts – Cascade County (quarterly reports)
      Dates: 1995-1996
      Container: Box/Folder 16 / 7
      Location: Subject Files
    • Description: AQD, Contracts – Lewis and Clark through Missoula County (quarterly reports)
      Dates: 1994-1996
      Container: Box/Folder 16 / 8-12
      Location: Subject Files
    • Description: BHES, Jay Huddleston and Anaconda Company
      Dates: 1971
      Container: Box/Folder 16 / 13
      Location: Subject Files
    • Description: Board of Health, Rules adopted
      Dates: 1986-1987
      Container: Box/Folder 16 / 14
      Location: Subject Files
    • Description: EPA, Acid Rain
      Dates: 1985-1986
      Container: Box/Folder 16 / 15
      Location: Subject Files
    • Description: EPA, Air Toxins
      Dates: 1992-1994
      Container: Box/Folder 16 / 16
      Location: Subject Files
    • Description: EPA, State – EPA Agreements (mid-year report)
      Dates: 1994
      Container: Box/Folder 16 / 17
      Location: Subject Files
    • Description: EPA, Clean Air Act – Title I-VI
      Dates: 1990-1998
      Container: Box/Folder 17 / 1-10
      Location: Subject Files
    • Description: EPA, Enforcement (Air)
      Dates: 1989-1994
      Container: Box/Folder 17 / 11
      Location: Subject Files
    • Description: EPA, “Part 70” (State Operating Permit Programs), Original and Revised
      Dates: 1992, 1994
      Container: Box/Folder 17 / 12
      Location: Subject Files
    • Description: EPA, “Part 70” – Revised
      Dates: 1995, 1997
      Container: Box/Folder 17 / 13
      Location: Subject Files
    • Description: EPA, “Part 70” – White Papers
      Dates: 1995
      Container: Box/Folder 17 / 14
      Location: Subject Files
    • Description: EPA, Permitting (Air)
      Dates: 1989-1994
      Container: Box/Folder 17 / 15
      Location: Subject Files
    • Description: EPA, Visible Emissions Inspection Procedures
      Dates: 1977
      Container: Box/Folder 17 / 16
      Location: Subject Files
    • Description: Fugitive Dust Policy
      Dates: 1976-1987
      Container: Box/Folder 18 / 1
      Location: Subject Files
    • Description: “Montana Oil and Gas Statistical Bulletin
      Dates: 1978-1980
      Container: Box/Folder 18 / 2
      Location: Subject Files
    • Description: Montana State Airshed Group, Complaints (re: Slash burning)
      Dates: 1991
      Container: Box/Folder 18 / 3
      Location: Subject Files
    • Description: Prevention of Significant Deterioration (PSD), Rule development
      Dates: 1970-1979
      Container: Box/Folder 18 / 4
      Location: Subject Files
    • Description: Rule 16-2.14(1), S1400 – S1440 (Permits, Incinerators, Wood Waste Burners, Particulates)
      Dates: 1978-1980
      Container: Box/Folder 18 / 5
      Location: Subject Files
    • Description: Rule 16-2.14(1), S1460 – Sxxxx (PSD) (PSD and Visible Air Contaminants)
      Dates: 1978-1982
      Container: Box/Folder 18 / 6
      Location: Subject Files
    • Description: Rule 16-2.14(1), S14082 and S14084 (NSPS, NESHAPS)
      Dates: 1977-1983
      Container: Box/Folder 18 / 7
      Location: Subject Files
    • Description: Volatile Organic Compound Control
      Dates: 1978-1979
      Container: Box/Folder 18 / 8
      Location: Subject Files

Finding aid prepared by Rachel Lilley; Updated by Lindsey Mick
2012; 2024

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