Trevali Mining Corporation ("Trevali" or the "Company")
(TSX:TV)(TSX:TV.WT)(LMA:TV)(OTCQX:TREVF)(FRANKFURT:4TI) reports that ongoing
development at its Santander Zinc-Lead-Silver Mine in west-central Peru is in
the final phase with initial mining and milling operations currently scheduled
to commence in Q1-2013. All critical mill and processing infrastructure is now
in place and underground development continues to progress well with 1.8
kilometres of ramp completed to date. Approximately 100,000 tonnes of
mineralized material averaging 5.6% zinc, 0.65% lead and 1.65 oz/t silver has
now been stockpiled on surface for processing upon commissioning of the 2,000
tonne-per-day plant. There are currently over 900 construction workers,
contractors, miners and management staff on site involved in the final
development process.


SITE INFRASTRUCTURE 

All core site infrastructure is now complete and fully operational -
accommodation units, catering facilities, and various mine planning and site
offices.


Construction of the project's 65-kilometre transmission-line to the National
Grid has been completed. Energization of the power-line is currently being
coordinated with the Peruvian regulator in order to minimize disruptions with
local end-users. It is anticipated that the Santander mine site will be
accessing power from the Peruvian Grid prior to year-end. In the interim, during
this the final construction phase, site is being powered by the Company's
run-of-river power station at Tingo and supplemented by a combination of
generators and excess power from a neighbouring mining unit.


PROCESSING PLANT 

The Processing Plant is currently scheduled to commence operation in Q1-2013
with ramp-up and optimization progressing thereafter (Fig. 1:
http://media3.marketwire.com/docs/837293_figures.pdf).


All critical plant buildings are completed - Flotation, Filter Areas,
Concentrate Sheds, Milling and Crushing modules, Zn and Pb Thickeners and Closed
Industrial Water circuits. The various Mills (Primary through to Re-grind) and
flotation cells are all installed. Ongoing construction is presently focusing on
finishing the Tailings Management Facility, Coarse and Fine Mineral Stock-pile
areas, E-Houses and the Reagent Unit. Piping and Electrical work is ongoing and
is making progress.


UNDERGROUND DEVELOPMENT

The Company's mining contractors, JRC Ingenieros, have completed an aggregate of
1.8 kilometres of underground ramp (5-metre-by-4-metre) development on the
Magistral North, Central and South deposits from three portals to facilitate
high-speed underground trackless mining (Fig. 2 and 3:
http://media3.marketwire.com/docs/837293_figures.pdf). Ground conditions are
moderate to good and minimal ground support is required to date in the ramps and
mineralized zones.


Underground development has confirmed the presence of several zones of
potentially significant footwall satellite mineralization that will require
additional drilling at a later date and contingent on results may provide
additional mill-feed. Underground channel sampling on one such zone at the
Magistral North Deposit returned the following results (Table 1 and Fig. 4:
http://media3.marketwire.com/docs/837293_figures.pdf):




    Table 1: Channel sample results from new footwall mineralized zone at   
                           Magistral North Deposit                          
                                                                            
----------------------------------------------------------------------------
Channel Sample   Length (m)     Zn%     Pb%     Cu%            Ag g/T (oz/t)
----------------------------------------------------------------------------
1                     4.65m   2.88%   2.51%   0.09%     57.9 g/T (1.69 oz/t)
----------------------------------------------------------------------------
2                     5.80m   3.24%   2.31%   0.09%     67.9 g/T (1.98 oz/t)
----------------------------------------------------------------------------
3                     3.50m   0.99%   0.54%   0.03%     12.3 g/T (0.36 oz/t)
----------------------------------------------------------------------------
4                     3.10m   7.14%   5.26%   0.18%    136.5 g/T (3.98 oz/t)
----------------------------------------------------------------------------
5                     3.45m   5.86%   5.73%   0.14%    168.7 g/T (4.92 oz/t)
----------------------------------------------------------------------------
6                     5.30m   7.88%   6.46%   0.28%    133.0 g/T (3.88 oz/t)
----------------------------------------------------------------------------
7                     5.45m   5.32%   4.83%   0.18%    142.3 g/T (4.15 oz/t)
----------------------------------------------------------------------------
Average               4.46m   4.76%   3.96%   0.15%    102.2 g/T (2.98 oz/t)
----------------------------------------------------------------------------



VICE PRESIDENT - INVESTOR RELATIONS AND CORPORATE COMMUNICATIONS 

Trevali is pleased to announce the appointment of Mr. Steve Stakiw as Vice
President, Investor Relations and Corporate Communications. Mr. Stakiw initially
joined Trevali in April 2008, as Manager - Corporate Communications, and has
been instrumental in expanding the Company's institutional and retail investor
base in North America, Europe and South America, in addition to being a key
member of the team that has raised in excess of $140 million to successfully
acquire, explore and develop the Santander, Halfmile, Caribou and Stratmat
projects to date. Mr. Stakiw is a geologist with over 20 years of mineral
exploration, research and finance/equity market experience, and has held senior
management roles with a leading mining research and investment publication and
has consulted to resource-focused investment funds.


Qualified Person and Quality Control/Quality Assurance 

EurGeol Dr. Mark D. Cruise, Trevali's President and CEO and a qualified person
as defined by NI 43-101, has supervised the preparation of the scientific and
technical information that forms the basis for this news release. Dr. Cruise is
not independent of the Company, as he is an officer, director and shareholder.


ABOUT TREVALI MINING CORPORATION 

Trevali is a zinc-focused base metals development company with operations in
Canada and Peru - the Halfmile and Santander mines respectively. In Canada,
Trevali owns the Halfmile zinc-lead-silver mine, the Caribou mine and mill, and
Stratmat polymetallic deposit 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 trial production from the
Halfmile mine was successfully undertaken in 2012 and underground 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 in 2013.


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 Q1-2013 with subsequent ramp up to full
2,000-tonnes-per-day production. Additionally through its wholly-owned
subsidiary, Trevali Renewable Energy Inc., Trevali plans to undertake a
significant upgrade of its wholly-owned Tingo run-of-river hydroelectric
generating facility to allow, in addition to supplying power to the Santander
mining operation, 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, Caribou 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.


FOR FURTHER INFORMATION PLEASE CONTACT: 
Trevali Mining Corporation
Steve Stakiw, Vice President, Investor Relations
and Corporate Communications
(604) 488-1661 / Direct: (604) 638-5623
sstakiw@trevali.com
www.trevali.com
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