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Brimstone oxide open pit mine |
The Brimstone Mine is expected to produce
approximately 375,000 ounces of gold and 1.5 million ounces
of silver over the next five years. While in production, by
the prior operator, between 1994 and 1998, the Brimstone
deposit contributed approximately 175,000 ounces of gold
production to the Hycroft Mines total production of more
than a million ounces of gold. Gold and silver will be
produced by utilizing a run-of-mine heap leach process and a
Merrill Crowe gold recovery plant. Gold production is
targeted to begin in the fourth quarter of 2008 and is
estimated to average 100,000 ounces per year from 2009-2011,
and 60,000 ounces in 2012. Average cost of sales per ounce
of gold for the life of the mine is estimated to be $340.
Selected operating unit rates for the project are estimated
to be:
|
Mining cost per ton mined |
$ 1.08 |
|
Mining cost per ton of ore processed |
$ 3.39 |
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Processing cost per ton of ore processed |
$ 1.18 |
|
General and administrative cost per ton of ore
processed |
$0.20 |
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Life of mine average strip ratio |
1:52 to 1 |
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Life of mine heap leach recovery |
56.6% |
Allied Nevada has purchased a mining
fleet. Allied Nevada personnel
will carry out all operating activities and provide technical,
health and safety, environmental and general management
support. The total labor force is expected to be
approximately 135 persons.
Based on current estimates, the initial
expenditure required to attain this production is expected to be $40
million, with virtually all of the capital funds planned to
be spent in 2008.
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Amount |
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($ thousands) |
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Mine fleet cost |
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Mining of overburden |
$12,698 |
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Leach pad construction |
9,600 |
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Refinery construction |
1,000 |
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Mobile equipment and site repairs |
1,770 |
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Other capital expenditures |
1,541 |
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Total capital expenditures |
$26,609 |
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