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Page: of 6

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' PAGE FOUR
MINING PRACTICE AT
-VALEDON NEW MEXICO
Mining methods of the BightyFive mines of the Calumet and
‘Arizona Mining Co., near Valedon,
N. Mex., are discused in an information circular just by the United
States Bureau of Mines, Department
of Commerce, written by Ralph B.
Youtz.
A production of 7,000 to 8,000
tons per month of siliceous coppergold-silver ore is mined from steep
veins occuring in igneous country
rocks, chiefly granodiorite. Ore
shoote are presistent, and veins,
wanging from 2 to 100 feet wide,
average 5 feet in width, usually with
commercial rather than structural
limits. In the upper levels both walls
and vein filling are hard and firm,
and will stand open indefinitely, but
. below the 1,350 level more intense
mineralization of the walls has taken
place, requiring cut-and-fill methods
in some place.
Experience has shown the ore to
be so uniformly continuous that the
only exploratory work now procticed
consists in the routine opening up of
deeper levels, with some extra crosscutting and raising near the ends of
the vein. Reserves are estimated in
100-foot blocks on the basis of channel samples, with proper’allowances
for horses of waste, dilution, and discrepancies between mine and smelter
assays.
The mine is developed in the usual way by vertical shafts (two for
operating use), drifts, crosscuts, and
has included studies of all the other
factors involved, such as increasing
population, number of operating vehicles, mileage per car, gasoline consumption, etc. :
‘Causes of accidents are given considerable space and are analyzed
in considerable detail. Factors tending to cause accidents, such as slippery pavements, foggy weather,
mechanical defects, etc., are given
consideration.
“It is our hope that wide and
immediate use of the information
set down in the phamphlet may be
made to the end that a better underStanding of the causes of accidents
may help decrease them,” Killick
said.
Copies of the phamphlet may be
obtained by writing to the Bureau
of Statistics of the California Highway’ Patrol located at Sacramento.
0.
IDLE PROPERTY TO
RESUME OPRATIONS
JAMESTOWN, Calif., May 27.—
The Arbone property, near Tuttletown, idle fro the last 20 years, has
taken ;oveqf by W .E. Campbell,
from Cassius Sewer , of Tuttletown,
and preparations for the resumption
of operations are under way. It has
a 600-foot incline shaf; on a three to
four foot vein with laterials at the
1000 200 and 400 foot depths,
on which ore varying value has been
exposed in past operations,
Dr. R. I. Bromley and Leanord
Leape of Sonora have franted E. T.
Preble of Los Angles a lease and
bond on the Bromley property about
three miles north of James town.
Surface development work has exraises. Developed, drilling and blast-! Posed a network of veins of varying
ing, and shaft-sinking details are
well treated. An interesting feature
of the latter is the use of key-board
blocking, which has proven superior
to stull-blocking in shaft timbering.
Shrinkage has always been the
most important stoping method at
this property. Inclined cut-and-fill
stopes'are restored to where the
walls are very week, where the vein
is wide but contains horses or brands
of waste, of where high-grade ore
oecure in narrow veins. All ore is
hand sorted from surface Picking
belt.
Shrinking stoping is usually done
in connection with drift-back timbering although in wide veins or
where the ore immediately above the
drift is of marginal grade, pillars
may be left. These pillars are usually
recoverable on completion of the
stope from below, if their frade warFants. In firm ground cribbed manWays are carried through the broken
ore between stopes. This necessitates
special drawing procedure to prevent
crushing of the manways by runs of
ere occasioned by unequal drawing on
the two sides. In heavier or faulted
ground, small pillars are left to protee; the manways, with dog-holes
broken through to the stope at about
35-foot intervals. Where foot-wall
drifts have been driven stopes are
carried direct to the level above;
otherwise the floor pillar may be recovered later. Ore remaining in stopes as drift-back pillars or cones be.tween shutes is pulled through the
stopes below. Present extraction is
close to 100 per cent, although considerable waste from the walls must
be sorted out. :
Cut-and-fill stoping is treated in
detail. Pumping is an importast
item some 450 gallons per minute
being raised in severa) lifts. Ventilation has become a Problem in the
bottom level, where the mine water
bas a temperature of 104° F. An
underground Jabor is on a cntract
basis,
Total mining cest in August, 1930,
was $4.49 per wet ton with a Pproduction of 1.45 wet tons per man-shift.
In two typical shrinkage and two
cut-and-fill stopes, stoping costs were
$1.23 and $1.75, and $2.46 and $2.37
per ton, respective}.
Details are given fully in Information Circular 6413, “Mining Methods at the Eighty-Five Mines, Calvme; and Arizona Mining Co., Valedon, N. Mex.,”’ which may be procured
free of charge from the United States
Bureau of Mines, Department of
Commerce, Washington, D. C.
TO PUBLISH MOTOR
Publication of the first complete
set of statistics on motor vehicle
accidents ever issued since the formation of the California Highway
Patrol was announced today by Victor W. Killick, departmental statistician.
THhe pamphlet will be assembled
for use of the general public as well].
as all students of traffic accident
problems. ‘
Believing, however, that the
traffic accident problem can be
better understood thereby, Killick
sgh te
widths and values on the property,
it is stated.
Roy H. Rushing, of Jamestown,
has advanced a tunnel 125 feet on
his lease covering a large block of
ground of the App ranch, two miles.
south of Jamestown. He is driving
to tap an ancient river channel believed to have been the source of
placer gold mined in adjacent gulches in the early days, according to
located in the Rainier National Forest, Washington, comprises 24,300
acres of forest land extending onehalf -mile on either side” of the
Natches Pass Highway for a distance of 5 miles. The outstanding
scenic and inspirational function of
this. memorial area will be safeguarded by the Forest Service.
0.
NOTICE
From now on the Colfax Bakery
will supply their products to the
Sacramento Street Grocery, Nevada
City, California.
ANGELINI CICOGNI, Prop.Eureka mine has a 2,700-foot threeTHE NEVADA CITY NUGGET, CALIF ORNIA
a
{— FRIDAY, MAY 29, 1931YELLOW ASTER MINE
TO START DEVELOPMENT
SAN ANDREAS, Calif., May 28—
The Gledick Mines Corporation, a
Los Angles concern, has acquired,
under lease and bond, from J. C.
McDonald, the Yellow Aster mine
on the Calaveras County side of the
Mokelume River, five miles north of
West Point, and inaugurated operations, under the supervision of Hi:
R. Derrer, Los Angles mining man.
A 500-foot drift tunnel, extended in
the early days, is being continued
on about a two-foot face of ore assaying, it is stated, $40 a ton in gold.
At a point about 150 feet from the
portal of the tunnel a raise has been
started on 10 inches of ore which is
said to average $1440 a ton in gold.
The property is equiped with a three
stamp mill.
woon Morris and associates of Los
Angies, who are operating several
placer gravel properties in Tuolumue
County ,have extended their investigation to Calaveras County. They
have taken under leose and bond
from W. H. Luddy and A. L. Wyllie
six parcels of placer gravel ground
approximating 844 acres, about three
miles southwest of San Andreas. Testing operations are soon to be started, it is stated. J. S. Cademortari,
of Sonora, will supervise the ‘work.
The Red Hill group of five claims,
on the Calaveras County side of the
Stanislaus River ,one mile east of;
Melones( has been taken over under lease and bond, from T. H. MaeArdle, of Sonora, by W. A. Snider
and V. V. Gee, of Long Beach, CalifPast Surface operations have resulted in the exposure of several promising showings, it is stated.
GERMAN INTERESTS MAY
BUY EUREKA HOLDINGS
SUTTER CREEK, Cal., May 27—
An unofficial rumor is current to the
[ nepotaiiad for the purchase from
San Francisco owners of the controlling stock interest of the South
Eureka Mining Company, the property of which extends along the main
segment of the Mother Lode, near
this town, for about half mile, with
the Central Eureka mine adjoining
it on the north and the Kennedy
mine on the south. Offical confrima-'
tion of the report is unobtainable,
at least at present. Partically idle
for more than a decade, the South
gives a vertical depth of 2,470 feet,
about half that of the Kennedy
property, the deepest gold mine in
the United States. Because of its
location and early production, mining
men familiar with the Mother Lode
have long considered the South
Eureka as possessing unusual potentialities at greater depth.
With the completion of the installation of all necessary machinery
and the erection of a 50-foot head
frame, opérations of the RusselKent Mining CGorporation of Delaware on the Courtwright 450-acre
property, three miles west of Jackson, have reached a stage permitting
of rapid sinking of the _ vertical
shaft, now down 25 feet and being
broken three-compartment size. The
company, an incorporated partnership of five. New York and Boston
business men, has recently increased
present 23 men.
The project, financed by private
funds, is the most ambititous mining,
undertaking launched along the
Mother Lode in Amador County in
recent years. It is ‘being watched
with keen interest by the mining
fraternity, espically on account of
the west of the main segment of
the great vein system. A depth of
1,200 feet is the present objective
of the management, with the first
‘level at the 300-foot point.
0.
ADDED LAD NEEDS_
MORE AIR PRESSURE
When a car is used for carrying
more than a full: pasenger load the
air pressure of the tires should be increased proportionately, advises the
Free Emergency Road Service of the
California State Automobile Association. ‘
the remoteness of the operation to'.
FRED M. MILLE
CONSULTING ENGINEER
CIVIL AND MINING ENGINEERING
REGISTERED CIVIL ENGINEER
LICENSED SURVEYOR
Hydraulics — Irrigation — Surveys
Land Classification.
LAST OFFICIAL MAP OF NEVADA
COUNTY ;
Hydraulics — Irrigation — Surveys
Office at Residence — Grass Valley,
262 Auburn Street.
LR ug
take"
your
washday
cares
re)
NATIONAL HOTEL
AND COFFEE SHOP
GOOD AIR
GOOD WATER
Meals and Rooms that will
" please
Elevation 2250 Feet
Let Us Serve You
Broad Street Nevada Cit“
THE ROSE LEE
BEAUTY SHOPPE
Hair Dressing and Beauty
Work. Famous Adele Miller
Toilet Articles. . .
LOUISE MARTIN
FINE WATCH REPAIRING
RADIO SERVICE AND REPAIR
CLARENCE R. GRAY . ;
520 Coyote St. Phone 15 ei
Work Called for and Deliveres.
GRASS VALLEY STEAM
LAUNDRY
111 Bennett St. Grass Valley
STAGE TIMETABLE
Graniteville Stage leaves Nevada
City at 7 a. m., for Lake City,
North Bloomfield, Moores Flat,. and
Graniteville. Leaves Graniteville at
7 a. m., for Nevada City.
Alleghany Stage teaves Nevade
City daily, except Sunday at 1:00 p
m., for Tyler, Columbia Hill, Alle
ghany and Forest. Leaves Forest at
6:30 a. m., for Nevada City.
Marysville Auto Stage. eaves ai
8.00 a. m., for Rough and Ready.
Smartsville, Hammonton and Marysville. Leaves Marysville at 1:00 p
m. Connects at Smartsville for
North San Juan.
Downieville Auto Stage leaver
Nevada City daily at 1 p. m., ar
Leaves Downieville daily at 6 a.
m., arriving in Nevada City in time
to connect with 10:30 train for
San Francisco.
Washington Stage leaves Nevada
City at 6:30 a. m., for Washington
Leaves Washington at 6:30 a. m.
for Nevada City.
——
mS BOT LS SD EO Re Oo F c ALt ¥ O BN iA
ee a. 3
S uppose
you couldnt get
7 of te g
LARGEST
OIL COMPANIES
in California
are served by
Bank of America
“ar
AIXTX
ins
IMAGINE : Every motor vehicle in California
stop ped dead for want of fuel.
It would not happen, of course. But it does illustrate
how everyone depends on gasoline. California motorists, in
1930, used one billion, three hundred million gallons.
In production, refining arid distribution, the pe:ro’eurm
industry employs an estimated 300,000 people throughout
the state. Such widespread operations enable the major oil
companies to make extensive use of the statewide service of
chis Baal.
With 200 separate Bank of America accounts in 147
communities, these com panies collect thousands of small
checks quickly; transfer funds with minimum delay and
expense ; obtain accurate ee and appraisals from widelyy separated localities ; simpli their accounting and effect other
economies which mean improved service to motorists.
The Bank also serves approximately 75,000 individual
depositors in the industry—any one
transferred to another territory. In
promptly forward funds — and
of whom may be ago
this event, the Bank will
even valuables in safe
deposit — to any branch; and with a letter of introduction,
“the customer quickly feels at home. “*
Bank of America is organized to give complete, convenient service to any business man — to any family — to you.
k of Amatoe
National Trust & Savings Association
Ke
EDDIE LEONG
Fresh Fruits and
Vegetables
FRESH FISH
All Kinds of Mellons
Free Delivery
JOY IN EVERY BITE
Every mother knows how childish
appetites long for ‘‘something
good.”’
Satisfy that longing, put a happy
light in the eyes of your children
with plenty of the most wholesome food—PATSY BREAD.
Order your supply from the
Grocer today
KOPP'S BAKERY
Nevada City, Calif.
Patronize Home Industry,
LEITER’S RADIOSHOP .
HOLBROOK REFRIGERATOR
Lowest Priced Refrigerator on the market. Complete in if
your home at $207.50. less extras. Demonstration given
at our place of business. We welcome you at all times.
We also carry Atwater Kent and Clarion Radios.
We demonstrate in: your home. Phone 286 .
than you have ever seen.
fact everything you need
Hardware.
Grass Valley
FIR-TEX SUPER-INSULATION
Defies Heat—Cold—Noise
The new building Board 4 inch thick. All 4 feet
in width; length: 6, 7, 8, 9, 10, 12 feet. Do not overlook this wonderful wall board; something different
SIMPLY WONDERFUL
Now our New Year's Stock arriving in car loads
daily. Paint and Oils of all kinds and colors. Corrugate Gale Steel Sheets, Lime, Plaster, Brick, Doors
and Windows galore. All kinds Cedar Shingles, Composition Roofing and Shingles in all the attractive
colors. New stock of Flooring, Ceiling, Rustics, in
for your new home. Remodeling or repair wood: Our delivery service is the
best. Don’t overlook our complete line of House
THE DIAMOND MATCH CO.
California
TS
acceptable. Write to
: M. M.
419 Security Bldg.
CAPITAL FOR MINES
‘Eastern Capital properly secured is always the quickest
and most satisfactory method to finance mines. Advertising by proper co-operation secures the Eastern contracts. Only $3.00 secures all the service of widespread
publicity including 50-word advertisement and a place in
gold exhibits to be shown in Eastern Cities, backed by
the salesmanship of experts. No stock selling schemes
Publicity Manager
.
SMYTHE
Los Angeles
———— et
i ape
——
TF ETE
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