Constellation Copper Corporation Reports Senior Management Change and Conference Call Notification

    DENVER, CO, June 28 /CNW Telbec/ - The Board of Directors of
Constellation Copper Corporation (CCU: TSX) wishes to report a senior
management change for the company.
    The Board regrets to announce that Greg Hahn, President and Chief
Executive Officer, is leaving the company, effective immediately. Mr. Hahn has
served Constellation Copper, and its predecessor, Summo Minerals in these
positions since its inception in 1995. Mr. Hahn's primary goal since joining
the company has been to bring the Lisbon Valley copper mine into production,
and he has played a key role in managing the construction and development of
the project. He now believes the time has come to pursue other personal and
professional goals and interests. In the interim, Pat James, Chairman of the
Board, will be acting President and Chief Executive Officer until the Board
can find a suitable replacement. The Board wishes to thank Mr. Hahn for his
years of dedication and hard work, and for his determination to get Lisbon
Valley built and put into operation.
    Constellation has two properties at the feasibility study stage in
Mexico: Terrazas, a large oxide zinc-copper deposit in Chihuahua; and San
Javier, an oxide copper deposit in Sonora. In order to ascend to the next
level of corporate growth, the Board and management have determined that it is
crucial for the company to complete the start up of Lisbon Valley so that
these new projects can be moved into the production base as soon as practical.
Therefore improvements at Lisbon Valley are being emphasized with the goal of
reaching the full sustainable production level during 2007. The Board will be
looking for a new chief executive with operation and development expertise who
can successfully lead the implementation of several improvement projects which
are underway or being considered at Lisbon Valley, and manage the development
of the Mexican projects. A detailed Lisbon Valley Mine progress report will be
included in the second quarter report of Constellation Copper Corporation.
    The company will host a conference call on Friday June 29, 2007 at
10:00 a.m. ET / 8:00 a.m. MT in order to discuss this announcement.
    To participate in the conference call, please dial (416) 644-3414
(Toronto & surrounding area), or toll free 1-800-733-7571. To ensure your
participation, please call approximately five minutes prior to the scheduled
start of the call.
    Replay archive: Please dial the toll-free access number 1-877-289-8525,
passcode 21238626#. The conference call will be replayed from 12:00PM ET on
Friday June 29, 2007 to 11:59PM ET on Friday July 6, 2007.
    The conference call will feature Mr. Pat James, Chairman of the Board, as
well as Mr. John Labate, Chief Financial Officer.
    We look forward to your participation and thank you for your interest in
Constellation Copper Corporation.

    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: Patrick M.
James, Chairman & CEO; Michelle Hebert, Manager-Corporate Affairs, (720)
228-0055, Toll Free: 1-877-370-5400, Fax: (303) 863-1736,,; Renmark Financial
Communications Inc.: Neil Murray-Lyon:;
Barbara Komorowski:; Media - Vanessa Napoli:, (514) 939-3989, Fax: (514) 939-3717,

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