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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New Era Petroleum, LLC.

Work Performed:  Rock mass evaluation, ground support standard development, mine audits, rock mass property testing, ground support component testing, geotechnical drill core logging/analysis, portal design, UCS and tri-axial strength testing of rock cores, interpretation of rock testing results.