MINEBK00722

• County: Boulder
• Volume: 7
• Document: Inspectr
• Suffix: B

MINING AND MINE METHODS.
,'The principal opening i~a an incline n}taft,G'X10' in clear,tvro compart-
ment~(bucketand ladder way )dipping to the S.li.at angle varying from
X40°to G5°. Depth of shaft 260 ft.
Shaft~haa levels at
GS ft. running south 125 ft, ,and north 275 ft,to surface,name being
i adit level;
1G5 ft. running south 261 ft.,and north 340 ft;
2(i5 •ft.running anuth 10 it. ,and north 10 Ct.
Wort. i:n carried on at present time at 2G5 ft.ntation;stoping north on
1G5 ft.level and driving lf>5 ft.level north.
~i The above worY.ingn are about 7,i0 ft,north oC the Houlder County and
I"folf Tongue tungsten mines.
~Ilioiating done by bucket nttac}:ed to ° steel sable +3 alonthn old,by
j safety chain.l'ft.oP load hoisted hifirk?.Diatanr,e },oi ntnd 2G5 ft.
;.lgnal.n given by 3~6" r.irn rope nttanhcd tn, 10° );onl;. Colorado rode of
a1g11a1a aI•e P.lilp ]. (eyed,
Idethod of raining- Drifting and overhand moping. 2,° 3u11ivnn air drills.
wain}; air at 10(H~,nnd hand dell},in;; are amployed,
!,Timbering- Leta and stu].ls unity; red spruce sad pine prnpn7•ed by },and.
IUndori;round trarnrning- }3ucY.et, and trolley. Trackage 16° ipuzge and 11#k
rail. •
IDrslinaga- .A, ;Io.;i Cmm~ron 3{:e7:7°%].'l.°liftn the vrntnr Cram n}ISft bottom to
~!nurl'ace, '
'Ventillltion- Natural.
"anitnry Coruiitionn- Cond.
''~.Gxite- Coed ladder road thrnug}, ruain abaft ,Ind G6 1't.adit level to
nurfuce.
.Underground ].lghting- Candl,an.