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MINEBK00657
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Last modified
1/12/2009 10:15:29 AM
Creation date
11/18/2007 12:13:27 PM
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Mine Books
County
San Juan
Volume
13
Document
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- 5- <br />Nature and condition of trark 2B lb, rails two on each <br />side oS skip, there are guard r•sils at all stations. <br />There are pillars left on each side of shaft to insure <br />safety, alI winzes and mill holes that are not in use are <br />covered. <br />T U N N E 'L S. <br />Blacksmith shay at aortal of. main tunnel is a wooden <br />frame bui'!.dixtg and snowsheds from portal to end of waste <br />dump about 500 feet, <br />The tunnel is provided with suffir,'iAnt doors to prevent <br />admission of noxious fumes or gases from said buildings <br />should fire aocur, <br />MT NF bIETHOD S. <br />The method of ore extraction is over hand stoping and <br />drifting with air and hand drills. Rind of air drily us9d <br />Waugh's Ingersoll Band, and°gtigersoll'Sergeant,"The method <br />of timbering is stuns and square set covered with lagging, <br />The timbers. are pine and snTuee prepared by hand and are <br />sufficient to secure safety. Und~rgr®und trdmnli.ng is done <br />by hand and electrie.motors, Steel ears are tiled For-tramming. <br />Chutes are loaded by hand and gravity, trackage ?0 lb rails <br />and 18" guage. Vent3latiors is natural,•d~ainape is ~laturai <br />through tunnels. The mine has four exit s, 'main lPvei ~C7, • <br />~4 level rrasscut to surface. Air raise Letter "G" ~6. <br />level and air raise ~'l Ilet±er "Cf" Fast drift. The iaddersin <br />manwayg are P5 feet apart and in good s3iape and re~idzT at <br />all times for employees, , <br />rieetricty and candles ara used for lighting underground, <br />All old timbers have teen removed from underground and the <br />sanitary csonditions are ~oo.d. <br />sTaTISTIas. <br />Production of gross tonage 840.000 tons, Average tonage <br />oar moth 1500 tons. <br />D F V E L 0-P E M E N T. <br />Total number of Pest in shafts 800 <br />" tunnels 160000 <br />" drifts and isvele 2800 <br />" winzes and raises 3000 <br />?~ " developement 168500 <br />
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