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File: TV-NR-15-04 Mining commences at Caribou - Mar 30-2015.pdf

                                                                             Trevali Mining Corporation
                                                                        2300 � 1177 West Hastings Street
                                                            Vancouver, British Columbia, CANADA V6E 2K3
                                                       Telephone: (604) 488-1661  Facsimile: (604) 408-7499
                                                                                           www.trevali.com



                                         NEWS RELEASE

       Trevali commences mining at Caribou Zinc Mine in
             anticipation of Q2 mill commissioning
TV-NR-15-04                                                                              March 30, 2015

Vancouver, British Columbia...Trevali Mining Corporation ("Trevali" or the "Company") (TSX:
TV; BVL: TV; OTCQX: TREVF; Frankfurt: 4TI) provides a status update on construction and mine
re-start activities at its wholly-owned Caribou polymetallic mine and mill complex located in the Bathurst
Mining Camp of northeastern New Brunswick, Canada.

Both surface and underground development programs at Caribou have advanced significantly during the
first quarter including the recent commencement of mining activities. The project status remains on
schedule for start-up commissioning in the second quarter of 2015. A summary of key current activities is
provided below:

MILL
   �   The milling circuit is predominantly refurbished and ready for operation with the new 3,000-
       tonne-per-day Semi-Autogenous-Grinding (SAG) mill installed and aligned (Figure 1). The two
       Ball Mills have been refurbished and will be available for commissioning following upcoming
       replacement of upgraded trunnion seals. The three M1000 IsaMills have been inspected and are in
       excellent condition (Figure 2). The Company has proactively replaced motor bearings following
       which they will be available for commissioning.

   �   The Zinc and Lead flotation circuits and associated pumps have been refurbished or replaced and
       are ready for commissioning. The Copper circuit design has been completed, tendered, with the
       majority of equipment sourced (from the former Brunswick-12 Mill) and on-site. During the
       commissioning period the Company intends to initially focus on the established Zinc and Lead
       (Silver) recovery circuits following which it will commission the new Copper circuit.

   �   In order to potentially fast-track mill commissioning and technically de-risk start-up, Trevali's
       mill operations team recently travelled to Australia to visit partner Glencore's Mount Isa and
       McArthur River zinc operations for knowledge transfer opportunities in IsaMill operations, fine
       grind flotation performance, maintenance practices and trouble-shooting. Additionally,
       experienced Glencore IsaMill operational specialists will be made available to assist Trevali's
       technical team onsite at Caribou during the upcoming mill commissioning and ramp-up. Trevali's
       team also took the opportunity to examine and discuss various other potential post-commissioning
       opportunities with their Glencore counterparts.
 Trevali Mining Corporation                          2                                      March 30, 2015
NR-15-04 � Continued


   �   DRA Americas Inc., a South African specialist metallurgy and plant operations group, has also
       been retained to provide additional expert support to the Caribou team as we commence mill
       commissioning and metallurgical optimization going forward. The DRA team has mobilized to
       site and is currently working on enhancing the mill maintenance programs in order to maximize
       equipment availability both during and post commissioning periods.




                  Figure 1: Newly installed 3,000-tonne-per-day SAG mill at Caribou Mine
 Trevali Mining Corporation                            3                                    March 30, 2015
NR-15-04 � Continued




                      Figure 2: Three M1000 IsaMills installed at Trevali's Caribou mill


UNDERGROUND
   �   Initial underground mineral production has commenced with blasting of the first scheduled stope
       and transport of mineralized mill-feed to the surface stockpile (Figure 3). There is currently an
       estimated 18,000 tonnes on the Coarse Mill-Feed Pad with this amount increasing on a daily basis
       (Figure 4). Based on experienced gained during the very successful Santander Plant
       commissioning in Peru, the Company plans to build a significant stockpile of mineralized material
       (approximately 60-80,000 tonnes) over the interim period prior to commencing mill
       commissioning in Q2.

   �   Approximately 3-years of underground development is currently in place: In detail Ramp, Level
       rehabilitation and access to the first four production zones are now 100% complete and
       rehabilitation of the fifth zone is approximately 80% complete. There is currently approximately 1
       million tonnes of mineralized material available for production.

   �   The construction of an underground ramp connection to the existing conveyor portal
       (approximately 400 metres of development) has been completed and is anticipated to result in
       significant operational efficiencies by reducing the underground haul distance to within
       approximately 100 metres of the Fine Mill-Feed Bins versus the previous approximately 1.5-km
       surface haul route. It is anticipated that this will decrease haul costs (shorter haul using larger
       trucks), improve underground fleet availability in addition to improving winter production
       capabilities.
 Trevali Mining Corporation                           4                                     March 30, 2015
NR-15-04 � Continued


   �   The mine is now approximately 80% dewatered, based on volume, with approximately 100
       vertical metres remaining. Upgrading of the water treatment plant and settling ponds is underway
       to roughly double capacity of Water Treatment Plant from 600-gallons-per-minute to plus-1200-
       gallons-per-minute in order to provide greater flexibility in water management going forward.




                   Figure 3: Loaded 40-tonne haul truck underground at the Caribou Mine




                    Figure 4: Caribou mill feed stockpile of approximately 18,000 tonnes
 Trevali Mining Corporation                           5                                      March 30, 2015
NR-15-04 � Continued


SURFACE WORKS
All critical surface works required for initial commissioning have been completed. Additional work will
occur post-seasonal Spring melt.

STAFFING
Caribou staff and contractor numbers have ramped up in accordance with mine and mill activity levels as
operations approach commissioning. Total site personnel (comprised of Trevali Caribou employees, staff,
and contractors) currently number approximately 230.

Total anticipated site personnel (both employees/staff and contractors) once operations are fully ramped
is expected to be approximately 300.

FIRST NATIONS TRAINING PROGRAMS
As part of Trevali's ongoing Impact Benefit Agreement with local Mi'kmaq First Nations, mining and
mill training programs have been initiated to provide qualified First Nation candidates with the skillsets to
take advantage of Trevali's goal of 20 percent First Nation workforce participation at Caribou. There are
presently 11 First Nation students in the underground mining common core program who are presently on
the practical portion of training at the Caribou mine. As well there are 12 First Nation candidates who are
on their sixth week of a twelve week mill operator training program. Both programs are being run
through the local community colleges.

Upon the completion and employment of these First Nation candidates, Trevali is proud to announce that
it will be one of the largest First Nation employers in New Brunswick.

ZINC COMMODITY OUTLOOK
Zinc-market fundamentals continue look very strong as London Metals Exchange inventory levels see
continued drawdowns and are now at plus-5-year lows, approaching the 515,000-tonne level (Figure 5).
Coupled with this are the scheduled closures of both MMG Limited's Century Mine in Australia and
Vedanta Resources Plc's Lisheen Mine in Ireland later this year, which have estimated 2015 annual
productions of approximately 320,000-370,000 tonnes and 160,000 tonnes of zinc in concentrate
respectively.

According to the International Lead and Zinc Study Group, zinc production lagged consumption by
296,000 tonnes in 2014 as stockpiles were being consumed. This production deficit is forecast to almost
double to approximately 580,000 tonnes this year and could widen to as much as 2 million tonnes in 2017
with no new, global marquee zinc mines scheduled to commence production within this period.

Trevali is the only primary zinc producer (as defined by greater than 50% revenues derived from zinc
production and sales) currently listed on the Toronto Stock Exchange.
 Trevali Mining Corporation                            6                                       March 30, 2015
NR-15-04 � Continued




          Figure 5: Zinc LME warehouse inventory levels (blue) vs. zinc price (orange); from InfoMine


Qualified Person and Quality Control/Quality Assurance
EurGeol Dr. Mark D. Cruise, Trevali's President and CEO, and Paul Keller, P.Eng, Trevali's Chief
Operating Officer, are qualified persons as defined by NI 43-101, have 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. Mr. Keller is not independent of
the Company as he is an officer and shareholder.

ABOUT TREVALI MINING CORPORATION
Trevali is a zinc-focused, base metals mining company with one producing operation in Peru and an
advanced-stage mine under development in Canada.

In Peru, the Company is actively producing zinc and lead-silver concentrates from its Santander mine and
2,000-tonne-per-day metallurgical plant.

In Canada, Trevali owns the Caribou mine and mill, Halfmile mine and Stratmat deposit all located in the
Bathurst Mining Camp of northern New Brunswick. The Company is currently advancing its 3,000-
tonne-per-day Caribou Mill Complex and mine towards scheduled Q2-2015 production.

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

The common shares of Trevali are listed on the TSX (symbol TV), the OTCQX (symbol TREVF) and on
the Lima Stock Exchange (symbol TV). For further details on Trevali, readers are referred to the
Company's website (www.trevali.com) and to Canadian regulatory filings on SEDAR at www.sedar.com.
 Trevali Mining Corporation                                        7                                              Marc
--->h 30, 2015
NR-15-04 � Continued



On Behalf of the Board of Directors of
TREVALI MINING CORPORATION
"Mark D. Cruise" (signed)
Mark D. Cruise, President

Contact Information: Steve Stakiw
                     Vice President, Investor Relations and Corporate Communications
                     Email: sstakiw@trevali.com
                     Phone: (604) 488-1661 / Direct: (604) 638-5623

This news release contains "forward-looking statements" within the meaning of the United States private securities lit
--->igation
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 in
--->tend, and
does not assume any obligation to, update such statements containing the forward-looking information. Such forward-loo
--->king
statements and information include, but are not limited to statements as to: the accuracy of estimated mineral reserve
--->s 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 nu
--->mber of
assumptions and estimates that, while considered reasonable by the company, are inherently subject to significant busi
--->ness,
economic, competitive, political and social uncertainties and contingencies. Many factors, both known and unknown, cou
--->ld
cause actual results, performance or achievements to be materially different from the results, performance or achievem
--->ents that
are or may be expressed or implied by such forward-looking statements contained in this news release and the company h
--->as
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 relate
--->d 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 c
--->ountries
where the Company may carry on business in the future; risks and hazards associated with the business of mineral explo
--->ration,
development and mining (including environmental hazards, industrial accidents, unusual or unexpected geological or str
--->uctural
formations, pressures, cave-ins and flooding); risks relating to the credit worthiness or financial condition of suppl
--->iers, refiners
and other parties with whom the Company does business; inadequate insurance, or inability to obtain insurance, to cove
--->r 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 explorat
--->ion 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 f
--->inancial
conditions; business opportunities that may be presented to, or pursued by, the Company; the Company's ability to comp
--->lete
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 explorat
--->ion
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 Co
--->mpany
has attempted to identify important factors that could cause actual results to differ materially, there may be other f
--->actors that
cause results not to be as anticipated, estimated, described or intended. The Company does not intend, and does not as
--->sume 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 Caribou-Halfmile-Stratmat and Santander are based only on Indicated and Inferred Mineral
 Trevali Mining Corporation                                     8                                             March 30
--->, 2015
NR-15-04 � Continued


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 def
--->ine a
mineral resource and it is uncertain if further exploration will result in the target being delineated as a mineral re
--->source.

We advise US investors that while the terms "measured resources", "indicated resources" and "inferred resources" are
recognized and required by Canadian regulations, the US Securities and Exchange Commission does not recognize these
terms. US investors are cautioned not to assume that any part or all of the material in these categories will ever be 
--->converted
into reserves.

This news release does not constitute an offer to sell or a solicitation of an offer to buy any of the securities in t
--->he United
States. The securities described herein have not been and will not be registered under the United States Securities Ac
--->t of 1933,
as amended, or the securities laws of any state and may not be offered or sold within the United States, absent such r
--->egistration
or an applicable exemption from such registration requirements.

The TSX has not approved or disapproved of the contents of this news release.
 

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