Trimountain Mining Company

Underground Dump for 6 Ton Skip No. 2 Shaft

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Drop Shaft and Shoe Globe Mine

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Underground Tram Car Plans Trimountain Mine

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Two Small Plans for Parts of Dash Pot Rod and Drag Crank Pin #3 Compressor

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Plans for Houghton Village Snow Scrapper

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Trimountain Mine Report for 1912

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Notes on Operating Costs of Champion and Trimountain Pump Stations

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Trimountain Coal Estimates

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Roof Data for Engine House Roof for Champion Mine

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Trimountain Mining Company Stamp Mill Proposed Arrangement of Buildings and Intake Blueprint

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