Santander Mine Production In Peru

VANCOUVER, BC - Trevali Mining Corporation reported preliminary first quarter production results at the Santander Mine in Peru. "During Q1 we saw continued strong throughput at the Santander Zinc Mine in Peru," stated Dr. Mark Cruise, Trevali's President and CEO. "As previously stated during the first half of this year at Santander will see operations continue to process ore primarily from the more zinc-rich Magistral Central and South Deposits and then mining will sequence back into the more lead-and-silver-rich Magistral North Deposit and Oyon Zone into the second half of the year, boosting Pb and Ag metal production for the remainder of the year and going forward."

For Q1-2017, Santander delivered consistent operational performance as mining continues to sequence through the more zinc-dominant Magistral Central and South zones. The Santander team continues to advance Magistral North ramp development in order to access the higher-grade Zn-Pb and Ag mineralization in the Magistral North and Oyon Zones, both of which remain open for expansion and which will result in increased Pb-Ag production in the latter half of 2017 and going forward.

Preliminary quarterly production of 12.6 million payable pounds of zinc, 1.9 million payable pounds of lead and 128,577 payable ounces of silver. Recoveries averaged 88% for zinc, 79% for lead and 63% for silver. Santander mill throughput for Q1-2017 was 200,249 tonnes, approximately 10% above the nameplate design of 2,000-tonnes-per-day (730,000 tonnes per year).

The Santander exploration team also commenced the Phase I, approximately 13,000-meter, 2017 exploration program in early April. The aim of the program is to aggressively probe the depth and lateral extents of the Magistral polymetallic system that remains open for expansion in addition to converting additional inferred tonnages into higher confidence categories to support longer- range mine planning. Conventional and directional surface drilling will initially test the high priority Santander Pipe target, which remains open for expansion at depth, for future mine planning purposes. It is anticipated that underground exploration will commence in June when dedicated exploration footwall drives are completed and will initially test the depth extents of Magistral North-Central and transitioning to Central-South as the program progresses. Contingent on success, Phase II drilling will continue to define and expand the mineralized systems.