Trevali Provides Caribou Zinc Mine Commissioning Update - Seite 3

To view Figure 2: Caribou mill zinc flotation circuit. Concentrate is being stockpiled in the onsite warehouse, please visit the following link: http://media3.marketwire.com/docs/trev2.jpg

Filtration & Tailings - The Zn and Pb filters are functional. Initial concentrate production is being warehoused on site for shipping once sufficient stockpile is present, currently scheduled for July. Initial zinc concentrate production has assayed up to 56% Zn and is in line with nameplate design. Ongoing work in July will now focus on lead concentrate optimization.

Copper circuit - Initial copper circuit construction is underway and remains on track for commissioning later this year.

CARIBOU MINING

Underground refurbishment, development and mining continue to advance according to plan. There are presently 9 kilometres, within a total of 13.3 kilometres of UG development, refurbished and available for production distributed over 8 mining zones (Figure 3).

To view Figure 3: Three-dimensional image of the Caribou Mine illustrating areas of current and planned future mining and rehabilitation activities, please visit the following link: http://media3.marketwire.com/docs/trev3.jpg

UG is currently mining at approximately 1,500-tonnes-per-day and continues to build a significant surface stockpile of mineralized material for mill commissioning. Production will continue to ramp-up over the summer with additional mining fleet scheduled to arrive during this period. The surface stockpile is essentially at capacity with an approximate 110,000-tonne stockpile of mineralized material on the Coarse Mill-Feed Stockpile.

Dewatering is ongoing and making significant progress following the Spring melt. Approximately 78 vertical metres of the mine remains to be dewatered, which at current rates will occur in August. On this basis it is estimated that the mine will be fully refurbished by October.

UG enhancements are ongoing and continue to focus on drill and blast optimization, road maintenance, haul optimization - have initiated a one-way "high-speed" system and improved UG communication system, installation of which will commence in July and is anticipated will result in increased mine fleet efficiencies.