MINEBK00447

• County: La Plata
• Volume: 13
• Document: Inspectr
• Suffix: A

-3-
The surface plant consists of blacksmith shop 12 x i4, ore
sorting house where the ore is .sorted. and .sacked 16 x 2A
the above buildings are at the tunnel entrance. A11 other
buildings are about.20fl0 feet Prom tunnel, then consist'
of one office 16 x 24, boarding house 18, x 36, i~unk house
16 x 24 and stable 8 x 10,
E R P L O S I y E S.
Kind and grade of explosives used 4,00 Nitro Glycerine giant.
Character .of :?use 7L, caps 5-x and woodAn tamping bars are
used. r~Xplosives in excess of one dsy's.supply are not
stored underground. The average amount of eaplo,sves
kept in starf~ge is 500, stored in a dry tunnel about
200 .feet west from main tunnel and used for this purpose
only, Candles are stored i?i.a store roam at boarding
hnUSe, device for thaMing powder is a double hot water
boiler heated by candles,
}d~~ .& I ,N G A N P M I N !~ M 'P R 0 It, S,
Nature and extend of main openings are,thleee tunnels
known as ~ 1, 2 & 3 this is wh~sre work is being carried
on. There is from 600 t© B00 feet of work in eatsh tunnel,
it is worked in rooms-witch posts fo-r timbers and f~11ed ~`
with waste rock as the ore is taken out, Method of timber-
ing is square sets in drifts and tunnels covered with
lagging,.. Tho timbers are spruoe and pine, prepared by hand, ~,
Underground tramming is. done. by hand. The system of
ventilation is natural, the tun~;ela have raises through
to surface,,0andles axe used. for lighting underground.
Each ,tunnel has two Axits in ease of fire, air shafts have
ladders with landing every 20 feel, there is one dooms at
each tunnel.
k
C 0 S T
Total number of feet in raises 240 cost per foot.-$8,.00 '.
Tot a1, #~t~ber of feet in tunnels ~ drii'ts 2000. cost-per foot X8,¢0
Costa of ooal ner t~i'1 ~8t50
Cost of bribers per month 2.5.00
Cost of steel per month 5,00
Cost of powder, fuse and caps pex~<asonth60.00
Cost of transporting suprlies to mine X50,00 per month.