The Eureka sentinel. [volume] (Eureka, Nev.) 1902-current, 1922-02-18
UNCLE SAM HAM
BURG CONSOLIDATION
Uncle Sam Engineer Submits
Report to California State
Commission

l.. ]. Rosenshine, engineer of the
Uncle Sam Mining Company, recently
submitted a report to the California
State Commission regarding the TAX
ing over of the Hamburg properties
for consolidation with the Uncle Sam
mines. The following data and state
ment of facts Is taken from this re-
port:
The Hamburg mine is situated on
Prospect mountain in the Eureka
laining district. It adjoins the south
end line OF the Uncle Sam property
and the same ore zone passes through
both properties. The Hamburg mine
comprises two patented claims, the
Hamburg and the Southern Pacific.
The ore zone or lode Is belt Of
crushed limestone, highly silicified ly-
ing between beds of calcareous shale
on the hanging and quartzite on the
foot wall. The limestone extending
through the Uncle Sam and Hamburg
varies in width from 400 to 500 feet.
The ore occurs In this lode In masses,
chutes, chambers and veins, usually
at the intersection of the north and
south fissures as well as along the
cross breaks. In the Hamburg and
Uncle Sam mines there are three
main north and south assures, all of
which contain ore, and in the Ham
burg mine there are seven cross
breaks which carry ore.
The Hamburg mine has been de-
geloped through five shafts, the Ham
burg, the Wade, the Southern Pacific,
the South, and the Friday. The Wade,
Southern Pacific and South shafts
were used for manways and ventila-
tion purposes. The Hamburg, the
main working shaft, is three COM
partments and is sunk to a depth Of
$50 feet, and it is situated in about
the center of the property. From
this shaft four levels were developed,
the ESQ, 450. 900 and $50 foot, and
more than 5000 feet of development
was done in drifts, cross cuts, raises
and wines. The Friday Incline is
40S feet deep and is at the extreme
north end of the property. 1t has
been connected with drifts to the
main shaft on the $50 foot level.
All of these shafts have caved near
the surface, and the main shaft is
caved in swelling ground above the
$50 foot level, so that II Is impossible
to operate the mine from the surface
without reopening the main shaft.
The two properties are so situated
that the main haulage tunnel of the
Uncle Sam will cut the old workings
of the Hamburg mine at depth of
$50 feet. To make connections with
the Friday Incline the main haulage
tunnel will have to be driven $50
feet. The face of the tunnel is now
about 800 feet from the south end
line of the Uncle Sam. This Is the
logical and cheapest way to reopen
the Hamburg mine. The ores from
both properties can be hauled to the
mill, which will be situated at the
mouth of the Uncle Sam tunnel.
The Hamburg mine was operated
until about 1890, when the smelters
in Eureka were forced to suspend op-
erations due to the drop in the price
of silver and lead. The total value
of the ores extracted from the mine
as shown by the records In Eureka Is
1905, ,37712 in gold, silver and lead,
and about 5000. .000'was extracted by
leasors, or a total of 100000. Most
of the ore was taken out above the
$50 foot level. and only ore having
value over $40 in gold, silver and
lead could be profitably mined and
smelted at that time.
From all the data than can be
gathered, and from the condition in
the other old mines of the district.
the Hamburg mine should contain
from 10000 to $4,000 tons of ore
having a value of from $40 to SIS in
gold, silver and lead. The ores of
the Eureka district should be mined
and milled at cost not to exceed 81
per ton, so that all ore over IS in
value should be worked at a profit.
l consider that the Hamburg and
Uncle Sam are really one mine. and
that the acquisition of the Hamburg
mine has more than doubled the val
ue of the holdings of the Uncle Sam
Consolidated Mining Company.