The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1915-10-21
Annual Report Interstate Callahan Co,

The third annual report of the Con.
solidated Interstate Callahan compan,
for the fiscal year ending June 20
1915, contains much interesting in,
formation concerning the operation,
and condition of the famous mine. Tn,
report contains a general statement
from John H. Robbers, president and
general manager of the property and
detailed reports from C. w. Newton
superintendent of the mine; D. F. Ha-
ley, consulting engineer, and John A
Percival secretary and treasurer
Manager Robbers says, in part:
Earnings.
''The year ending June 80, 1914. left
us with an operating loss of $99,31S64
During this year just closed we have
been able not only to wipe out that
deficiency, but also to accumulate an
operating profit to pay dividends
amounting to 1897 $3.50, and still
leave our surplus on June 80, 1915.
showing the handsome figure of ST.
094,S62.01.
Underground Conditions.
1T was the aim of the manage
ment to develop sufficient ore reserves
to insure steady operations for a per-
iod of three to four years, and there
after to have this development keep
pace with ore extraction. With this
in view, the ore body which hitherto
had been opened up only on Interstate
tunnel No. 4, was developed or Levels
2, and 315 and shaft was sunk AIS
feet from tunnel No and the ore
body opened up on levels and 6. The
various levels were connected, and ore
Is now being extracted on four levels.
The shaft is equipped with skip chutes
so that 1t can at short notice be plac-
ed in commission for hosting our full
requirements of ore from levels below
tunnel No. after our ore reserve
above tunnel No. is exhausted. At
the present time, only development
work is being carried on below tunnel
No. 4. All ore mined above this level
40 tcihCi Odb tIlOuSll lllG OdlldIlstH
raise, which is connected with levels
3 and az and equipped with ore peck
cts.
Abandon Square Sets.
"a radical change was made in our
stopping system. We abandoned the
square set system entirely, employing
instead the so-called waste fill sys-
tenn. This has not only materially
reduced our mining cost, but it has
also resulted in material increase in
the metal contents of our mill feed,
which was increased from about 20 |
22per cent zinc to 27-S0 per cent zinc.
Ore Reserves.
1.-The quantity of ore developed |
above level No. is sufficient to in |
sure operations at the present rate of |
production for approximately four
years. The property is now in shape |
to keep up development work with |
the idea of constantly replacing what |
ever quantity of ore is extracted in |
stopping for many years to come.
Profit With Low Prices.
'1n our mining and milling opera
tons, we are constantly studying and |
instituting every economy consistent |
with good practice. Our work has
shown steady progress, and the prop
erty is in shape to make satisfactory |
earnings, even after spelter prices re-
turn to the level which prevailed prior
to the outbreak of the European war"
Development Accomplished.
Superintendent Newton gives in
detail the work accomplished which is
condensed in the following figures, his
report embodying only six months, be-
ginning January 1, 1915, when he took
charge of the property:
Feet /