Montana Historical SocietyLibrary & Archives
UPMC 21
Western Energy
Company
Western Energy Company records
1918-1979
3.0 linear feet
The Western Energy Company, a coal generated power company
located in Colstrip, Montana, was a subsidiary of Montana Power Company and the successor to
the Northwestern Improvement Company. This collection (1918-1979) subject files including
field books (1927-1951) and survey notes; a log book for Pit No. 6 (1940s-1950s); engineer
and production reports; maps and blueprints; Colstrip Parks Project (1976-1977); Montana
Power Company utility rates (1979); and blueprints of Rosebud Coal Field. Also included are
exhibit maps, an expense ledger (1929-1938), and historical information of the Northwestern
Improvement Company.
A9:4-7
English
This collection is arranged into one series: Subject Files (1918-1979, undated).
Preliminary arrangement only.
Collection open for research.
Researchers must use collection in accordance with the policies of the Montana Historical
Society Library & Archives. The Library & Archives 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.
item description and date. Collection Title. Collection Number. Box and Folder numbers.
Montana Historical Society Library & Archives. Helena, Montana.
Acquisition information available upon request.
Preliminary sorting only.
This collection is indexed under the following headings in the Montana Historical Society
Library & Archives catalog. Researchers desiring materials about related topics,
persons, or places should search under these terms.
Coal mines and
mining--Montana--Colstrip.
Coal-fired power
plants--Montana--Colstrip.
Colstrip (Mont.)--History.
Montana
Mines and Mineral
Resources
Detailed Description of the Collection
Subject Files
1
Colstrip mine field books
1927-1951
Oversize
Rosebud Coal Field blueprints, "Surveys and
Explorations 1918" (includes index)
1918
2
Production and engineer reports, field survey anotes
(includes construction, street paving, various mines)
n.d.
3
Blue prints of hydraulics and of electric light plant
1930s
3
Drilling equipment catalogs and maintenance manuals
1930s-1940s
3
Log book for pit No. 6
1940s-1950s
3
Montana Power Company utility rate schedules
1979
3
Northwestern Improvement Company expense ledger
(includes primarily rental cottages/houses)
1929-1938
3
Northwestern Improvement Company history
n.d.
3
Northwestern Improvement Company, Western Energy
Company Exhibit maps of pit No. 6
1948
3
Western Energy Company Colstip Parks Project (U.S.
Dept. of Interior Bureau of Outdoor Recreation Project; includes specifications,
manuals,economic analysis, correspondence)
1976-1977