Dr. Warren Pratt Joins Sienna's Board of Directors

    CALGARY, Aug. 16 /CNW/ - Sienna Gold Inc. (SGP.V TSX Venture Exchange)
(the "Company") is pleased to announce that Dr. Warren Pratt, of Garmouth, UK
has agreed to join the Company's Board of Directors, subject to regulatory
    "Dr. Pratt is a welcome addition to our board. His 18 years of mineral
exploration experience complements the expertise of the other Board members
and strengthens the Company's exploration capabilities. Dr. Pratt will also
continue to consult to the Company as he has in the past. I am very pleased to
have Dr. Pratt join our board and want to welcome him on behalf of the Board
of Directors," said John Rucci, President of Sienna.
    Warren Pratt is a geologist with 18 years of mineral exploration
experience. He graduated in 1986 from Hull University (UK) with a 1st class
degree in Geology (Hons). He then received a Ph.D. in Structural Geology at
the University College of Wales (Aberystwyth) in 1989. From 1990 to 1997 he
worked for the British Geological Survey, the last two on World Bank-financed
regional exploration in Ecuador.
    Between 1997 and 2001, Dr Pratt worked for Ecuanor ASA, a Norwegian
Junior, initially as Project Geologist, finally as Exploration Manager. Their
portfolio included porphyry copper, epithermal gold, and massive sulphide
deposits. During this period, he discovered the Canicapa high-sulphidation
epithermal gold deposit in Ecuador (subsequently drilled by IAMGOLD/Gold
Fields, now with International Minerals Corporation).
    Dr. Pratt has consulted on numerous projects since 2001. A few of the
more notable ones are listed below:

    1)  Rio Blanco Cu-Mo porphyry in north Peru (1.25 BT @ 0.57% Cu;
        Monterrico Metals plc. This is one of the world's largest undeveloped
        Cu deposits);
    2)  the Regalito copper porphyry project in north Chile (628 MT @
        0.43% Cu, mostly leachable; Pan Pacific Copper);
    3)  the Pallancata silver mine, Peru ((greater than) 60 MOz Ag;
        International Minerals Corp (IMC)/Hothschild Mining plc);
    4)  the Pahtavaara gold mine, Finland (production approximately 1 tonne
        gold per year; ScanMining Ab);
    5)  the El Galeno copper-molybdenum-gold porphyry, Cajamarca, Peru
        (765 MT @ 0.64% Cu, including 2.78 MOz Au; Northern Peru Copper
    6)  the Bjorkdal gold mine, Sweden ((greater than) 1.1 MOz Au; Minmet
    7)  the Gaby gold porphyry, Ecuador (Historical Resource (greater than)
        5 MOz Au; IMC);
    8)  the Rio Blanco gold project, Ecuador ((greater than) 600,000 oz Au;
        in permitting stage; IMC);
    9)  the Blaiken zinc lead gold mine, Sweden (Zn, Pb, Au, Ag mine;
    10) the Haquira copper porphyry, Peru (156 Mt leachable Cu; Antares
    11) the Svartliden gold mine, Sweden (2.9 Mt @ 4.4 g/t Au; Dragon
        Mining Ltd).

    The TSX Venture Exchange has neither approved nor disapproved of the
    information contained herein.

    Statements in this press release regarding the Company's business which
are not historical facts are "forward-looking statements" that involve risks
and uncertainties, such as estimates and statements that describe the
Company's future plans, objectives or goals, including words to the effect
that the Company or management expects a stated condition or result to occur.
Since forward-looking statements address future events and conditions, by
their very nature, they involve inherent risks and uncertainties. Although the
Company believes that the expectations reflected in such forward-looking
statements are reasonable, it can give no assurance that such expectations
will prove to have been correct. These statements are subject to certain risks
and uncertainties and may be based on assumptions that could cause actual
results to differ materially from those anticipated or implied in the
forward-looking statements. The Company is under no obligation to update or
alter any forward-looking statement. These risks include operational and
geological risks, the risks involved with operating in a foreign jurisdiction
and the ability of the Company to raise necessary funds for exploration. The
Company's forward-looking statements are expressly qualified in their entirety
by this cautionary statement.

    %SEDAR: 00008773E

For further information:

For further information: John Rucci, President, (403) 508-2061 or by
e-mail rucci@telus.net

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