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Triangle Mining and Development Company Records , 1906-1923

Overview of the Collection

Creator
Triangle Mining and Development Company (Missoula, Mont.)
Title
Triangle Mining and Development Company Records
Dates
1906-1923 (inclusive)
Quantity
2.8 linear feet of shelf space
Collection Number
MC 267
Summary
The records of this early twentieth century Missoula, Montana mining company (1906-1923) consist of correspondence, employment, financial, legal and organizational records; minutes; and reports and print material. Also included are personal papers (1898-1922) of individuals associated with the company, and organizational records (1901-1950) of a variety of other companies. The company's mines were located in the Wallace Mining District.
Repository
Montana Historical Society, Library and Archives
Montana Historical Society, Library and Archives
225 North Roberts
PO Box 201201
Helena MT
59620-1201
Telephone: 406-444-2681
Fax: 406-444-5297
mthslibrary@mt.gov
Languages
English
Sponsor
Funding for encoding this finding aid was provided through a grant awarded by the National Endowment for the Humanities.
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Historical Note

On August 25, 1906, R.B. Hughes, E.P. Dungan, and Harry Y. Gephart, incorporated the Triangle Mining and Development Company in Missoula, Montana, with $500,000 in capital stock. By 1910 the value of the company's shares had increased to $1.2 million, but their success in raising capital does not seem to have been matched in production. The only evidence of production appears in the Montana Mine Inspector's Reports, 1909-1912, describing the development of a two compartment shaft and 500 feet of tunnels. A company brochure describes the company as a collection of eleven copper-silver-gold mining claims located just east of Missoula near Clinton, a townsite at East Clinton, a millsite along the Northern Pacific and Chicago, Milwaukee & St. Paul mainlines, and water power from Rock Creek. Although company financial records exist up to 1923, the company does not appear in the Missoula City Directory after 1916. In addition to mining, the company seems to have had interest in real estate, and a number of smaller mining companies. One of the principals throughout the life of the company, Harry Y. Gephart, a native of Pennsylvania, also served as Missoula City Treasurer during the 1910s.

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Content Description

This collection contains incoming, interoffice, and outgoing correspondence, employment records, financial records, legal documents, minutes, organizational records, printed materials, and reports. The correspondence (1906-1923) does not provide much information about the company operations, rather it is dominated by legal/property-related correspondence. The Financial Records (1906-1923), consisting of ledgers, journals, cashbooks, and invoices, provide the only means of reconstructing the mining operations, since there are no production records or engineering reports. The Legal Document records (1906-1923) include--mining claims, deeds, titles, contracts, leases, water rights, and wills/probates--which do document the creation of a corporation but do not shed any light on operations. The same applies to the Organization series, which includes stock certificates, stockholder ledgers, and articles of incorporation, but tells the researcher nothing about the daily operations of the company. There are fourteen separate small subgroups, consisting of a variety of personal papers and organizational records for other companies. The subgroups include A.K. Andersen (1913-1917), B.P.O.E. (1924-1950), Buffalo Mining Company (1915-1917), Calumet Clinton Copper Company (1909), Patsy H. Duffy (1913), East Clinton Townsite Company (1901), Harry Y. Gephart (1898-1922), O. P. Jackson (1898-1911), Hiram Knowles (1911), V. Sherwood Kutchin (1909-1913), David Lagasse (1911), Missoula Metal Milling Company (1913), Ray-Jefferson Mining Company (1910), Ten Doy Mining Company (1915), and John Wood (1908-1912).

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Administrative Information

Arrangement

by subgroup and series

Acquisition Information

Acquisition Information:

available upon request

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Detailed Description of the Collection

Detailed Description of the Collection

The following section contains a detailed listing of the materials in the collection

Names and SubjectsReturn to Top

Subject Terms

  • Mines and mineral resources--Montana--Mineral County
  • Mines and mineral resources--Montana--Missoula County
  • Mining claims--Montana
  • Real estate business--Montana--Missoula

Geographical Names

  • Mineral County (Mont.)
  • Missoula (Mont.)--Commerce
  • Missoula County (Mont.)


2004

CC Attribution
This work is licensed under a Creative Commons Attribution 4.0 International License.

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