MINEBK00804

• County: Boulder
• Volume: 12
• Document: Inspectr
• Suffix: A

Cash - 4.
• - SURFACE. PLAN i - Contin.
material from falling in the shaft while dumping and also is
of auffioient height to prevent persons from tripping and fall-
i~g in. 011 is naed Yor lighting on the anrfaos.
E X P L O S I V B S.
German Inaolflid lane, b-% oapa and California, 40,w". slant
powder are used. wooden tamping bare are provided for the nee of
the employes.
Explosives aro storod in a irame,.iron-aovered~ magaazine
stationed 1b0' south of tho abaft house and used Yor thin purpose
only. the averagd amount ox explosives kept in storage is b00~.
Explosives in exoeea of one day's supply aro not kept nnder-
ground.
• The dsvioe for thawing powder le a dugout in a bank 3b'
south of the shaft hones. A steam ooil is naed Yor heating this.
idlftI iiG & &iI rE NiBrt'ri0D3 .
~' Y'he main shaft is :S6b' in depth, oribbed 3" a 8" plank
~ Por a diatanoe of 26', and divided into two oompartmonts for
a buoket-way and•ladder-way. At the following depths Yrom the
,
surfaoe lovola havo been run;- 140'-level - aest,228'; wont
60'.
, ,
E40'-level - Est: 177'; west, 110'. Soo'-level - east, 165';
west, 10'. prom the 2&0'-level to the 140'-lnvol atoping has

i boen done. Some atoping has boon Bono betweoa the 240'-level
'~
K y~: and tho S40'-level. Tho only. work being oarriod on at the pre-
~',:.
b' seat time is sinking the abaft.
«.,
Aa additional exit is provided through a abaft 60' west
.<w;
~: of tho main chait. This shaft oonnoote pith the main abaft nt
;~;a.
rt:
~;
a depth of 140' from the surfaos. The ezit is kept Sa good oon-
~+~ dition, proporly agnipped Frith aaio nad gooQ ladders and 1a eae-
'~
~ ily aoaeselble to tho eoployee.
~...

f • The lecher-way in the main abaft oontains air pipoe, hna

safe, eaoure and sooeeaible ~nddera and has landings 100' apart.

~,, 1'he ground iron thu 240'-level to the 140'-level 1e etop-