ROCA - MAX Molybdenum Mine Production Update

    ROK: TSX.V
    No. 04-08

    VANCOUVER, June 11 /CNW/ - Roca Mines Inc. (ROK: TSX-V) ("Roca" or "the
Company") provides the following update on operations and development
activities at the MAX Molybdenum Project near Revelstoke, British Columbia.


    -   Production of molybdenum (contained in concentrate) for the months of
        April and May, 2008 was 125,243 lbs and 150,502 lbs, respectively;

    -   Average mine diluted head grades for April and May, 2008 were
        0.712% Mo and 0.732% Mo, respectively, approximately 70% of target;

    -   Power generation issues impacted production capabilities during the
        months of April and May, 2008 resulting in overall throughput of
        approximately 60% of target;

    -   Throughput and head grades are improving and anticipated to meet
        monthly production targets of 300,000 lbs molybdenum by the end of
        June and 600,000 lbs by fall of 2008;

    -   Breakthrough of the No. 2 Adit, a key component to the Phase II
        development of the mine was achieved in May, 2008.

    Production Statistics

    The following table provides a summary of production statistics for the
months of April and May, 2008;

    MAX Molybdenum Mine               April 2008              May 2008
    Molybdenum produced               125,243 lbs             150,502 lbs
    Average head grade                0.712% Mo               0.732% Mo
                                     (1.19% MoS2)            (1.22% MoS2)
    Molybdenum Recovery               93.8%                   94.3%
    Mill availability                 74%                     82%
    Target throughput                 500 tonnes/day          500 tonnes/day
    Average daily throughput          300 tonnes              335 tonnes
                                     (60% of target)         (67% of target)

    While mine and mill performance are steadily improving, production goals
were not reached during April and May, 2008. Milling and mining throughput
were impacted by power generation issues caused by electronic controls on the
three primary gensets. The Company is making alterations to these controls to
reduce future downtime. Equipment in the mill has also required repair during
the period but is now remedied and continuous mill throughput rates are
expected to be met by the end of June.
    Ore production for the months of April and May came primarily from the
uppermost stopes in the mine plan. Initial stope design was based on drilling
and modeling of the high-grade zone without the aid of underground exposures
to assess geological controls on the mineralization. As a result, head grades
were diluted during the period due to larger volumes being mined from these
stopes. The Company anticipates that head grades will improve as geological
experience with the system is gained through mapping and as an established
grade control program aims to minimize dilution.
    Management is encouraged by the mine's ability to achieve targeted daily
molybdenum production rates when all operations were functioning as planned.
Improvement of the operation's ability to achieve the targeted throughput
rates and head grade on a continuous basis remains a priority with targeted
monthly production rates of 300,000 lbs by the end of June and 600,000 lbs by
fall 2008 being anticipated.

    Phase II Expansion and Development

    Adit No. 2 development was completed in early May 2008, and work is
underway to establish an upgraded ventilation system for the mine. Once
connected, the underground mine will be capable of achieving its Phase II
ventilation requirements.
    The Company is constructing foundations in preparation for a new mill
base for its third ball mill. The installation of this mill will allow for
greater production flexibility and will provide for a nominal capacity of at
least 1,000 tonnes per day. The new equipment is to be commissioned by the
fall of 2008. A concentrate drying system is now substantially installed and,
once operational, will assist in controlling moisture content in the
molybdenite concentrates produced.
    The permitted Phase I mine plan for MAX will focus on the deposit's
high-grade zone containing 280,000 measured and indicated tonnes grading 1.95%
MoS2 (refer to T.N. Macauley's 43-101 compliant technical report dated
September 2004 available via SEDAR). Molybdenum oxide currently trades in the
US$33-34/lb. range.

                               ROCA MINES INC.

                              "Scott Broughton"

                 Scott E. Broughton, P.Eng. - President & CEO

    The TSX Venture Exchange does not accept responsibility for the adequacy
    or accuracy of this release.

    %SEDAR: 00018660E

For further information:

For further information: Doug Fosbrooke, Investor Relations, Tel: (604)
684-2900, Fax: (604) 684-2902, Email:, Web:

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