TV.WT Trevali Mining Corp

Trevali Mining Corporation ("Trevali" or the "Company")
(TSX:TV)(TSX:TV.WT)(OTCQX:TREVF)(LMA:TV)(FRANKFURT:4TI) announces that
construction at its Santander Zinc-Lead-Silver Mine in west-central Peru is
progressing well and commissioning is anticipated in the fourth quarter.


SITE INFRASTRUCTURE

All core site infrastructure is now complete and fully operational -
accommodation units, catering facilities and various mine planning and site
offices. Construction and commissioning of the project's 65-kilometre power-line
is nearing completion and the minesite will be connected to the Peruvian power
grid prior to commissioning.


PROCESSING PLANT

Merit Consultants International Inc. continues to supervise construction of the
2,000 tonne-per-day (tpd) Processing Plant by Cempro Tech S.A., a Lima based
specialist construction firm, on behalf of the Santander Project Development
Team (a joint development between Trevali and Glencore International).


Construction of the Plant is progressing: the mills are installed, the flotation
building erected and the flotation cells are installed, crusher and zinc and
lead thickener foundations completed, new steel for mill and crusher buildings
is on site and is being erected and the crushers are being installed, tailings
dam sealing is ongoing and mineral stockpile preparation is advanced (Figure 1).


UNDERGROUND DEVELOPMENT

The Company's mining contractors, JRC Ingenieros, have been actively advancing
underground development on the three Magistral deposits with three crews fully
staffed and equipped. All key underground service and support facilities are in
place, namely water, air, underground offices and training rooms, lamp-room,
various explosive magazines and equipment shops (Figures 2 and 3).


Based on current development schedules it is anticipated that approximately
95,000 tonnes of mineralized material grading 5.61% Zn, 0.65% Pb and 1.65 oz/t
Ag will be stockpiled and available for mill commissioning.


To view Figures 1 to 3, visit the following link:
http://media3.marketwire.com/docs/Trevali_Figures1to3.pdf


ABOUT TREVALI MINING CORPORATION

Trevali is a zinc-focused base metals developer with operations in Canada and
Peru - the Halfmile and Santander mines respectively. In Canada, Trevali owns
the Halfmile zinc-lead-silver mine and Stratmat polymetallic deposit, and has
entered into a definitive agreement to acquire the Caribou Mine and Mill, all
located in the Bathurst Mining Camp of northern New Brunswick. The Company also
has the past-producing Ruttan copper-zinc mine in northern Manitoba. Initial
production from the Halfmile mine commenced in early 2012 and development is
ramping up to achieve a planned production rate of approximately
3,000-tonnes-per-day to feed planned operations at the Company's Caribou Mill
Complex (subject to closure of its acquisition).


In Peru, the Company has the Santander zinc-lead-silver mine and the
former-producing Huampar silver mine, both located in the Central Peruvian
Polymetallic Belt. Mine commissioning is anticipated to commence at the
Santander operation in late-2012 with ramp up to full 2,000-tonnes-per-day
production to follow shortly thereafter. Additionally through its wholly-owned
subsidiary, Trevali Renewable Energy Inc., Trevali is undertaking a significant
upgrade of its wholly-owned Tingo run-of-river hydroelectric generating facility
along with transmission line upgrades and extensions to allow, in addition to
supplying power to the mining operation on the property, the potential sale of
surplus power into the Peruvian National Energy Grid.


The common shares of Trevali are listed on the TSX (symbol TV), the OTCQX
(symbol TREVF) and on the Lima Stock Exchange (symbol TV). Warrants to purchase
common shares of Trevali are listed on the TSX (symbol TV.WT). For further
details on Trevali, readers are referred to the Company's web site
(www.trevali.com) and to Canadian regulatory filings on SEDAR at www.sedar.com.


On Behalf of the Board of Directors of TREVALI MINING CORPORATION

Mark D. Cruise, President

This news release contains "forward-looking statements" within the meaning of
the United States private securities litigation reform act of 1995 and
"forward-looking information" within the meaning of applicable Canadian
securities legislation. Statements containing forward-looking information
express, as at the date of this news release, the Company's plans, estimates,
forecasts, projections, expectations, or beliefs as to future events or results
and the company does not intend, and does not assume any obligation to, update
such statements containing the forward-looking information. Such forward-looking
statements and information include, but are not limited to statements as to: the
accuracy of estimated mineral reserves and resources, anticipated results of
future exploration, and forecast future metal prices, anticipated results of
future electrical sales and expectations that environmental, permitting, legal,
title, taxation, socio-economic, political, marketing or other issues will not
materially affect estimates of mineral reserves. These statements reflect the
Company's current views with respect to future events and are necessarily based
upon a number of assumptions and estimates that, while considered reasonable by
the Company, are inherently subject to significant business, economic,
competitive, political and social uncertainties and contingencies.


These statements reflect the Company's current views with respect to future
events and are necessarily based upon a number of assumptions and estimates
that, while considered reasonable by the company, are inherently subject to
significant business, economic, competitive, political and social uncertainties
and contingencies. Many factors, both known and unknown, could cause actual
results, performance or achievements to be materially different from the
results, performance or achievements that are or may be expressed or implied by
such forward-looking statements contained in this news release and the company
has made assumptions and estimates based on or related to many of these factors.
Such factors include, without limitation: fluctuations in spot and forward
markets for silver, zinc, base metals and certain other commodities (such as
natural gas, fuel oil and electricity); fluctuations in currency markets (such
as the Peruvian sol versus the U.S. dollar); risks related to the technological
and operational nature of the Company's business;

changes in national and local government, legislation, taxation, controls or
regulations and political or economic developments in Canada, the United States,
Peru or other countries where the Company may carry on business in the future;
risks and hazards associated with the business of mineral exploration,
development and mining (including environmental hazards, industrial accidents,
unusual or unexpected geological or structural formations, pressures, cave-ins
and flooding); risks relating to the credit worthiness or financial condition of
suppliers, refiners and other parties with whom the Company does business;
inadequate insurance, or inability to obtain insurance, to cover these risks and
hazards; employee relations; relationships with and claims by local communities
and indigenous populations; availability and increasing costs associated with
mining inputs and labour; the speculative nature of mineral exploration and
development, including the risks of obtaining necessary licenses and permits and
the presence of laws and regulations that may impose restrictions on mining,;
diminishing quantities or grades of mineral reserves as properties are mined;
global financial conditions; business opportunities that may be presented to, or
pursued by, the Company; the Company's ability to complete and successfully
integrate acquisitions and to mitigate other business combination risks;
challenges to, or difficulty in maintaining, the Company's title to properties
and continued ownership thereof; the actual results of current exploration
activities, conclusions of economic evaluations, and changes in project
parameters to deal with unanticipated economic or other factors; increased
competition in the mining industry for properties, equipment, qualified
personnel, and their costs. Investors are cautioned against attributing undue
certainty or reliance on forward-looking statements. Although the Company has
attempted to identify important factors that could cause actual results to
differ materially, there may be other factors that cause results not to be as
anticipated, estimated, described or intended. The Company does not intend, and
does not assume any obligation, to update these forward-looking statements or
information to reflect changes in assumptions or changes in circumstances or any
other events affecting such statements or information, other than as required by
applicable law.


Trevali's production plans at Halfmile-Stratmat and Santander are based only on
Indicated and Inferred Mineral Resources and not Mineral Reserves and do not
have demonstrated economic viability. Inferred Mineral Resources are considered
too speculative geologically to have the economic considerations applied to them
that would enable them to be categorized as Mineral Reserves, and there is
therefore no certainty that the conclusions of the production plans and
Preliminary Economic Assessment (PEA) will be realized. Additionally where
Trevali discusses exploration/expansion potential, any potential quantity and
grade is conceptual in nature and there has been insufficient exploration to
define a mineral resource and it is uncertain if further exploration will result
in the target being delineated as a mineral resource.

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