MINEBK00728

• County: Boulder
• Volume: 17
• Document: Inspectr
• Suffix: A

Copper Oleaoe - 4. _ _
M2HIA(i Ro MIRE METR0D3- Contin.
i •
oare,are employed on a trsokage oY 18!' guage sad 12~ T rails.
Tha'ti.uboril2g 16 good and 651iYieiout 1n sisv dud riumuer $u ln-
sure safety. Ho maehine drills-,are employed,and only.aiagle hand
dri111ng 1s done,. Overhead etoping,end rifting.oxe amploygd,.,for
oxe~extraotion..0arbide lumps ere used for,llghting underground.
At s diete,noe .of lti0!• Srom_ the portal oP .the, tunnel ;the .
Copper Olanoe vein ie intereeoted ends drift le driven east on
this ve1R 400'. Some.etoping is done A~ri this dr~.it ana aotive
work Se oarried on at this point.et.the present tSme..At.a die-
tanoe oP 276' Prom the portal oY the tunnel the.Oray Copper vein
Se intereeoted and 18' of driYting has been done on the west
eidq. No etoping done in this drift.
8 T A T I e T I 0 8.
Average tonnage per month, 16.
Average value oY ore per ton, X20.
Cost per ton transporting ore, X1,80.
post per ton treatment oY smelting ore, ~6.
Ooat por ton treatment of ooneontrating ore, ~1.k8.
Coat per ton mining oY ore, -------
~ Average oast per month of timber, ~8.
Average ooet per month of powfler, X7.8.
Total number of Peat in tunnels, 180.
n n n n " drifts, d90..
Men employed;
8 Mlttere, X3.00 for 0 hour shift.
Avoroge cumber oP men employed Por the yeax, R•
G E N E R A L R R M A R R g.
Ao persona under the age of twelve years are employed in
or about the mine and etrangera or visitors are nob allowed un-