Trevali Reports Santander Mine Q2-2015 Production

Q2 payable production of 13.7 million lbs zinc, 8.7 million lbs lead and 290,225 ounces silver

July 8, 2015

Vancouver, British Columbia…Trevali Mining Corporation (“Trevali” or the “Company”) (TSX: TV; BVL: TV; OTCQX: TREVF; Frankfurt: 4TI) reports preliminary production results for its second quarter (“Q2”) ending June 30, 2015 of approximately 13.7 million payable pounds of zinc, 8.7 million payable pounds of lead and 290,225 payable ounces of silver from the Santander Mine in Peru (see Table 1).

Q2-2015 recoveries at Santander averaged 90% for zinc, 88% for lead and 78% for silver. Mill throughput for the quarter was 190,497 tonnes. Average Q2 head grades were 4.27% Zn, 2.47% Pb and 1.85 oz/ton Ag with production of 14,706 tonnes of zinc concentrate averaging 50% Zn and 7,080 tonnes of lead-silver concentrate averaging 59% Pb and 39.2 oz/ton Ag for the quarter.

“Now running at solid state capacity and with many of the optimization initiatives and improvements now in place, Santander delivered an excellent production quarter and strongly surpassed its Q1-2015 output,” stated Dr. Mark Cruise, Trevali’s President and CEO. “The Company remains strongly on-track to meet its 2015 Santander production guidance.”

Table 1: Santander Mine Q2-2015 production statistics

	Q1-2015	Q2-2015	YTD 2015
Tonnes Mined	182,258	191,259	373,518
Tonnes Milled	185,365	190,497	375,862
Average Head Grades:
Zinc	4.03%	4.27%	4.15%
Lead	2.13%	2.47%	2.30%
Silver (ounces/ton)	1.65	1.85	1.75
Average Recoveries (%):
Zinc	90%	90%	90%
Lead	90%	88%	89%
Silver	80%	78%	79%
Concentrate Produced DMT (dry metric tonnes):
Zinc	13,430	14,706	28,136
Lead	5,925	7,080	13,005

	Trevali Mining Corporation	2			July 8, 2015
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	Concentrate Grades:
	Zinc	50%	50%	50%
	Lead	60%	59%	59%
	Ag (ounces/ton)	41.04	39.17	40.09
	Payable Production:
	Zinc (pounds)	12,536,783	13,684,058	26,220,842
	Lead (pounds)	7,407,887	8,705,988	16,113,875
	Silver (ounces)	254,805	290,225	545,030

2015 Santander Mine Production Guidance

Santander Mine 2015 production guidance estimates remain unchanged at approximately:

• 48 million to 50 million pounds of payable zinc (in concentrate grading approximately 50 per cent Zn) at an average head grade of 4.2 to 4.4 per cent Zn
• 23 million to 25 million pounds of payable lead (in concentrate grading approximately 55 to 57 per cent Pb) at an average head grade of 1.8 to 2.1 per cent Pb
• 850,000 to 950,000 ounces of payable silver at an average head grade of 1.5 to 1.8 ounces per ton Ag

Cash costs for 2015 are estimated at approximately US$48 to US$51 per tonne milled. (Please see Cautionary Note on Forward Looking Statements at the end of this document)

Q2-2015 Financial Results and Conference Call

Trevali will release financial results for its second quarter period ending June 30, 2015 on August 14, 2015 after the close of the trading day in Toronto. The Company will host a conference call and audio webcast at 10:30 a.m. Eastern Time on Monday, August 17, 2015 to review the financial results. Conference call dial-in details and audio webcast link will be provided in the financial results news release.

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali’s President and CEO, 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 another currently undergoing commissioning in Canada.

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

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 commissioning its 3,000-tonne-per-day Caribou mine.

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

Trevali Mining Corporation	3	July 8, 2015
NR-15-17 – Continued

The common shares of Trevali are listed on the TSX (symbol TV), the OTCQX (symbol TREVF), the Lima Stock Exchange (symbol TV), and the Frankfurt Exchange (symbol 4TI). 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.

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

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