Langston & Associates

Geological and Mining Engineers

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Kinross Gold Corporation

New Era Petroleum, LLC.

MT Manroc Development

International Roll Forms,

Golden Sunlight Mines, In

Stillwater Mining Company

Hecla Limited

P.T. Freeport Indonesia

Chevron Mining, Inc.

Dynatec Mining Corporatio

Denison Mines Inc.

Montanore Minerals Corp

GeorgiaPacific Gypsum LLC

Barrick Goldstrike Mines

Sanford Labs

Addwest Minerals Int'l

SK Geotechnical, Inc.

U.S. Silver Corporation

Coeur Alaska, Inc.

Belmont Mining

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Kinross Gold Corporation

East - West Gold Corporation Division

Work Performed:  Generation of rock mass parameter predictive model, development of nominal ground support design, development of ground support in thawing permafrost areas of mine development, portal design, structural engineering analysis as applied to questions on underground stability, analysis of geologic structure for potential wedge failure in development headings.  Ground control audit and rock engineering investigations in an Arctic permafrost mining environment