The Calumet news. [volume] (Calumet, Mich.) 1907-1938, 1910-12-12
Superior Il Boston
Annual Report of Consulting Engineer
r. H. PrOberf
r. III. PrOberf

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I intersection which will be at a dept
approximating 1900 feet
Gardner Shaft.
In all 1.l73 feet OF work was don
at this shaft during the fiscal yea
just ended, in the development of tn
Black Oxide vein on the fourth leve
of the Gardner shaft. The last so
/ feet of the drift west was in the shat
tered heavily manganese stained lime
stone, but no copper was found unit
the diabase limestone contact wa.
reached in one OF the short norti
cross-cuts which were periodical!
driven. The first ore body developed
from the Garnder shaft is Immediate
~ below that which has been mined In
the Black oxide tunnel above, although
the ore is Of a different character and
carries much manganese oxide. The
ore body has been drifted on for 2I5
feet on the fourth level. The east
drift has a Wine down 40 feet and a
raise up So feet showing carbonate
ore of good grade i'm a mass of hema-
tite and oxide of manganese up to four
feet in width of the Wine the greater
part Of the way. Here the vein
Strengthened up, but was exposed
again by two south cross-cuts. At
this, the lowest depth OF the Black
oxide vein, complete oxidation is ev-
ident. The top Of the east raise is
still 500 feet vertically below the bot
tom of the Black Oxide tunnel Wine.
Good ore shows in both places and the
vein being persistent ore of shipping
grade viii be mined from the inter-
Vening space when the workings are
connected. The showing in the Gard
ner shaft has encouraged the Old
Dominion company TO reopen the
Buckeye mine and carry on extensive
developments.
Having proved the existance of a
commercial ore body and being still
i'm the oxidized zone. work was sus-
pended at the Rardner i'm July pending
the acceptance of a submitted plan of
at a lower level from the
McGaw shaft.
The prognostications made for the
Gardner shaft have been verified by
the opening of this attractive ore body
during the fiscal year just ended.
improvements.
During the year another battery of
two 250 II. p. Sterling Boilers has
been installed at the McGaw plant so
that there is now available 900 horse
power. one battery is in use while the
other is cleaned.
Steam or compressed air operated
have been. added TO the
Nordberg hoist.
a 1000 gallon Prescott pump was
installed at the sixth level station in
the McGaw shaft. steel lined ore bins
Of 250 tons capacity were built at the
McGaw Shaft.
A Word drill sharpener was pur-
chased for the blacksmith shop, which
has materially reduced the expenses
Of this department.
Electric current for lighting the Nc
Cav plant and mine has been obtained
rom the Arizona Commercial COM
Dany at a reasonable rate.
The McGaw branch of the Southern
Pacific railroad has been completed
Turing the year. All material is now
lauled direct to the McGaw shaft
without transfer through Globe to the
Did Dominion yards and so via the
Arizona Commercial Railroad to the
nine. The new schedule OF freight
railroad communication are great adj
gantages to Superior & Boston.
An excellent change house con-
,eniently located with reference TO the |
McGaw shaft has been built. Each /
nan is supplied with steam heated
ecker. Shower baths. drying racks
md Mushrooms add to the comfort of
he men. and indirectly add to the
efficiency of the organized force.
The engineering department under
Mr. II r.. Earring has done excellent /
work. All the claims have been accur-
Itely located. monumented and map |
ed from careful triangulation surveys.
rhe greater part of the mineraliZed |
erritory has been contoured and de-
allied geological maps made of the |
surface and all underground workings, !
With numerous cross sections. We feel
hat we can now intelligently plan de-
.elopments to give the best and quick
.st results owing To clearer under !
standing of the geological complex. ]
nave submitted a very exhaustive re-
,ort TO your President embodying the
esults of my work. both scientific and
operative since became Connected with
he company in March 1908. This re-
,ort IS on file i'm the Houghton office. |
/ wish 20 express my appreciation
" the competent work of John j.. |
Jr.. who has faithfully and
guided all work planned, as
of the property, and
I. De Rhodes who is directly response
Die for the condition of the under
ground workings.