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<br />Big Horn - 3. <br />S U n F A C E P T. 6 H T. <br /> <br />- - I• <br />The smith's shop is Yrame, iron-oavered, 10'x12' and <br />situate 35' southwest of the portal oY the tunnel. .The ohsag- <br />ing house is in the saith's shop. There is one ore bin oY 30 <br />tons capacity sitt}ate 100' southwest oY the portal oY.tha <br />tunnel. 8o proteotion against Yire ie needed as there are no <br />buildings near the portal o±' the tunnel. Candles are used <br />Yor lighting underground. <br />E% P L O S I F E S. <br />Dupont powdei - 40~. German Inaoloid fuse, b-% Daps <br />,•and wooden tamping bars are employed. Explosives in exoea s <br />of one day's supply are not stored. undorgrotu2d. <br />The averago amount of powder kept in storage ie b0~. <br />This is stored in a Sraae, iron-covered aagazine situate 7b' <br />south of the portal oY the tunnel and used Yor the storage <br />oY po~~der only. no device for thawing ponder is provided. <br />bt I H I II G & M I P .. 2ri E T H O D S <br />The aein opening ie a tunnel that has been driven on <br />the vein for a dintane of 207'. The tunnel is 4:x7' in the <br />' clear. is timbered vrith poste and Daps Yor a dietanoe oY 16' <br />Yroa the portal and has a uniform grade oY ly. <br />Active work is confined to_atoping about 100' Yrom <br />the portal o= the tunnel. <br />^ <br />Ore extraction is done by aea.ns oY otrerhand atoping <br />and drlYting. Only hand dxilliag is done. <br />Underground tramming is done by hand with steel Dare <br />and the trackage is 18" guage and 12~ T rails. <br />ve~ilation sad drainage are natural and nq noaions <br />gases are sot with. Timbering and sanitary conditions are <br />good and su3Yicient. <br />f. <br />:-~_ , S T A T I S T I C S. <br />i - •,,~ . <br />'i !iti i <br />