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<br />Rookford - 5,
<br />• - E%PLO SIVES-Contin.
<br />gtie pipe tamping bars are used. Reoommendatione have been given
<br />to provide wooden tamping bare Yor the use oY the employee.
<br />Explosives in exoeas of one day'e supply are not stored
<br />underground. The avGrgge amount or explosives kept in storage is
<br />2,000. This is kept in a atone and oement magazine, a' x 12',
<br />200' northeast or the portal or the tunnel and used Yor the
<br />storage or powder only. d powder monkey is employed. Oile, oan-
<br />dlea and other combustibles are stored in the ohanging room.
<br />The device Yor thawing powder is a small Yrame building
<br />heated t,ith a hot water ooil kept ,hot with n stove, Thia build-
<br />ing is 40' west of the ohanging house,
<br />MI A I14G & ESI ICE METHODS •
<br />The Rookford 'lunnol etnrta from the south aide oY the low-
<br />er and oY Turkey Creek gtLloh, and .near the northerl~~ edge of
<br />the oompany'e Property, The,Portal of the tunnel is about lbb'
<br />higher than the traoks of the Colorago & Southern R, R. It is
<br />a erase-out tunnel, 6'x F3' in size and 2,1ti0' in length. At 960'
<br />from the portal it interaeots the Magnlona vein; at,1,92U' Prom
<br />the portal it intorscote the Donaldson vein. Several other veins
<br />hnve been out by the tunnel but no work has been done upon any
<br />exoapt the two above mentioned.
<br />Yrom the polat of interaeotion a drift ie run wegt on the
<br />Mngalottn vein a dietanoo of 2,b00'. 3toping,ia oarried en in
<br />this drift at a point 1,100' from the interaeotion. Yor about
<br />90U' oontiauoue ore ie dieoloaed in thin drift, the •ein,vary-
<br />!ag in -+idth from 1' to 3'. Tho average eaeay value is ,77 per
<br />ton. •
<br />Yrou the point of interaeotion a,driit in run rent on the
<br />D~naldoon vein 1,500' and eaet.lb0'. do upraise 800' high,ls,
<br />.cede 1n the west drift at a point 700' frou the interaeotion of
<br />the veitt. -leet of the upraise moping !e oarried on, The np-
<br />rai~e !e e4ulPpod nlth a 10 h.p. eteaa helot need to loner the
<br />ore and rook. The vein zi111ng Se aoetly mineralized porphyry
<br />
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