MINEBK01143

• County: Boulder
• Volume: 16
• Document: Inspectr
• Suffix: A

Harall - 4.

. :~•:Fersythr.,pewder. -~ 40y6: 4lrmf-a :Iatel~ia hu4 b-][ oaps
sad weoddi tampia; bars .aas :empleyed~: Eaplosl[es:•ia ~xoes~: of
vas day's supplg ane .ant ate;sd uadsr~reuYd.::~ :,;...o ~... ..
.. '_,'Ths aTesaae~amouat::ef eaplesi~es:kept x,,at~rag~ is.;60~.
This is:kept:.,ia_a.;trame~_irea-oevsred;magasise gitneit~ 800'
aertheast.af the ahaft.hense aaS used for the ateng~ ~~ p~Fder
•eal~. •All• ether gnpplies are stored an the•;ahs~, heu4~.
.. .,.He,derioe~ier thawing pewdgr has besa.previded e~rthr
pewder•used deeo:;aet harden;exoept;ia extremelg oe~.d:wawth~r.
MIBI14a ~ MIIIE METHOD~g •
_ ,. •:~:
The •maia:epeaiag•is a ehaYt 160!~in depth;vhia~.is orib-
b~d Sir a~.distuoe..eY10''frem the rnrisos with:hewa~..timbess.
the.baluo• of the abaft being timbered with atolls. At,a,.a~pth
ei:80!-tiym the• surfaoe aidrift is run east-lb0' l-ifl,Rest 160'.
•At.s depth et 160'.a drift.is.;rua went 1Q0';,4>.:up~i~~.,p._made
~•irem the 1b0-ft. lenl tr ths:80-ft.;level and ume.~.t~piag,
•I
has been done is the drifts.
The only aoti~e werk:oarried.ea is uaaerhud eteping is
thr~east-80.-tt.: ls~el:abent 100!:dietaat tram the aha3t; also.
ezteaaiig:tlie 1bOrft. 1e,~e1.,. ,.• ... ,.,.
Direetly below at a distaaoe et ~00' free the ahaTt~heuse
is•the portal •f the only tuaael.dri~ea ea thi^ erinp. The tna-
ael 1r 300! :.iale~th bat has beea•.abaaduea axd: is ia. poor oea-

-. Blettrieity,is:the method employed for hoistine:snd the
nee are net raised end levered with the heisting maohinerg. d
lead weighing 600 iv heistea.a distaaoe e2.1b0' with.a three-
eighths.iaeh,ateel wire osble~that.has been ia.uss •ae y~ar~
and is la pod oenditiea..a sa2ity-hook ua ohaia-fastened on
gad of osb~e STith olamps i• used sad has bsea'empl~yed for one
yMr•.1tFtesial..i^ heisted ir~m two' Ietels. ~ .
~;la .....:u .. - -