Lisbon Valley Copper Mine, San Juan County, Utah Production Update



    TSX: CCU

    DENVER, CO, March 13 /CNW Telbec/ - Constellation Copper Corporation
(CCU: TSX) wishes to report production data for its wholly-owned Lisbon Valley
copper mine located in San Juan County, Utah.
    Sales in February totaled 2,130,000 pounds of cathode copper (all LME
Grade A) at an average price of $2.50/lb. Cathode harvested during the month
totaled 1,730,000 pounds. This is in line with expectations and guidance, as
February is a short month and harvesting of cathode copper continued at
month-end into early March. The company carried an inventory of 277,000 pounds
of cathode copper into March.
    Acid leaching of ore on the leach pad is continuing to improve. The flow
of pregnant leach solution (PLS) from the leach pad continued to average 5,000
gallons per minute (GPM) in February. The average PLS grade of approximately
1.9 grams per liter (GPL) Cu in early March represents an increase of
(approximately equal to)10% over the average PLS grade in February. The
average PLS flow rate in February was 24% higher than in January, and PLS flow
through the plant should continue to increase as ambient temperatures
increase.
    As announced in early February, we will be converting the solvent
extraction facility from series to parallel configuration in mid-March, once
final instrumentation is delivered. This conversion will allow us to increase
design flow rates from 4,300 GPM to 5,000 GPM, an increase of 16% over current
design capacity, and an increase of 32% over the average PLS flow through the
plant in February, thereby processing through solvent extraction and
electrowinning all 5,000 GPM of PLS flow coming off the heap. PLS grades
should continue to increase to +2 GPL Cu through March. In late March our
plating rates should get back to normal, as flow rates and solvent extraction
efficiencies increase with increasing temperatures.
    We are pleased that we have most of the cold weather issues nearly behind
us, and look forward to increasing our copper production month-to-month as we
go forward.
    Micheal Attaway, VP-Operations and a Professional Engineer, is the
Qualified Person responsible for the content of this release.

    This press release contains certain forward-looking statements. In
certain cases, forward-looking statements can be identified by the use of
words such as "plans", "expects" or "does not anticipate", or "believes", or
variations of such words and phrases or statements that certain actions,
events or results "may", "could", "would", "might" or "will be taken", "occur"
or "be achieved". Forward-looking statements involve known and unknown risks,
uncertainties and other factors which may cause the actual results,
performance or achievements of the Company to be materially different from any
future results, performance or achievements expressed or implied by the
forward-looking statements. Such factors include, among others, risks related
to changes in commodity and power prices, changes in interest and currency
exchange rates, inaccurate geological and metallurgical assumptions (including
with respect to the size, grade and recoverability of mineral reserves and
resources), unanticipated operational difficulties (including failure of
plant, equipment or processes to operate in accordance with specifications,
cost escalation, unavailability of materials and equipment, delays in the
receipt of government approvals, industrial disturbances or other job action,
and unanticipated events related to health, safety and environmental matters),
political risk, social unrest, and changes in general economic conditions or
conditions in the financial markets. Although the Company has attempted to
identify important factors that could cause actual actions, events or results
to differ materially from those described in forward-looking statements, there
may be other factors that cause actions, events or results to differ from
those anticipated, estimated or intended. There can be no assurance that
forward-looking statements will prove to be accurate, as actual results and
future events could differ materially from those anticipated in such
statements. Accordingly, readers should not place undue reliance on
forward-looking statements.
    %SEDAR: 00002465E




For further information:

For further information: Constellation Copper Corporation: Gregory A.
Hahn, President & CEO; Michelle Hebert, Manager-Corporate Affairs, (720)
228-0055, Toll Free: 1-877-370-5400, Fax: (303) 863-1736,
info@constellationcopper.com, www.constellationcopper.com; Renmark Financial
Communications Inc.: Neil Murray-Lyon, nmurraylyon@renmarkfinancial.com;
Barbara Komorowski, bkomorowski@renmarkfinancial.com; Media - Lynda Martineau,
lmartineau@renmarkfinancial.com, (514) 939-3989, Fax: (514) 939-3717,
www.renmarkfinancial.com

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