Trevali Mining Corporation (TSX:TV) (TSX:TV.WT) (OTCQX:TREVF) (LMA:TV) (FRANKFURT:4TI) announces that processing plant commissioning, and zinc and lead-silver concentrate production from its Santander Mine in Peru, is progressing well. Concentrate inventories are accumulating with initial shipments scheduled this month.

Since the announcement of production commencement at Santander in mid-August the Company has seen mill performance and commissioning ramp-up steadily improve from approx. 500 to 1,500-1,600 tonnes-per-day, about 75% of its nameplate 2,000-tonne-per-day capacity.

The metallurgical recovery circuits are also seeing steady improvements as the reagent/flotation process gets balanced through the ramp-up process. During the month of August the processing plant was processing very low-grade material as the operators familiarized themselves with the plant. The Santander team is steadily increasing mineral head-grades in addition to optimizing mill feed towards anticipated nameplate hard-rock/stockpile production levels. Recoveries to date are essentially directionally proportional to mineral feed grades, that is, higher grades result in higher recoveries.

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Tonnes processed to date (approx.):                            35,000 tonnes

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Zinc concentrate produced to date (approx.):                    1,200 tonnes

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Average zinc concentrate grade:                                       49% Zn

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Lead-silver concentrate produced to date (approx.):               300 tonnes

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Average lead-silver concentrate grade:                    49% Pb, 47 oz/T Ag

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Period                    Zinc recovery     Lead recovery   Silver recovery

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Since start-up                       73%               78%               58%

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(i)September-to-date                 77%               79%               64%

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Note: Reported production is preliminary in nature and subject to regular

and ongoing reconciliation studies.

(i) September average feed grades to date: 3.5% Zn, 0.8% Pb and 0.9 oz/T Ag

Now that sufficient initial mineral processing and concentrate data has been acquired, Trevali’s consulting metallurgist will be on-site in September in order to help further optimize Plant operations and recoveries. It is also anticipated that comissioning later in the month of the OAS / Courier system (a real-time Plant geochemical analysis system) should also have an additional positive effect on mineral recoveries.

The Company currently has approx. 160,000 tonnes of mineralized material stockpile grading 4.9% Zn, 1.2% Pb, 0.22% Cu and 1.5 oz/T Ag at its crusher pad that is feeding the mill.

“We are very encouraged with the excellent progress being achieved in the Santander Mill commissioning, which is a testament to the dedication and skill set of the operations team,” stated Trevali President and CEO Dr. Mark Cruise. “With significant concentrate inventory now in our on-site warehouse facilities, our maiden concentrate shipments are scheduled to commence later in the month.”

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali’s President and CEO, 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 mining company with operations in Canada and Peru.

In Peru, the Company has commenced commissioning and concentrate production at its Santander zinc-lead-silver mine and metallurgical plant with subsequent ramp up to 2,000-tonnes-per-day production scheduled in Q4-2013.

In Canada, Trevali owns the Caribou mine and mill, Halfmile mine and Stratmat polymetallic deposit all located in the Bathurst Mining Camp of northern New Brunswick. Initial trial production from the Halfmile underground mine was successfully undertaken in 2012 and the Company anticipates commencing operations at its 3,000-tonne-per-day Caribou Mill Complex in 2014.

All of the Company’s deposits remain open for expansion.