Trevali Provides Caribou Zinc Mine Re-Start Update

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Dec. 18, 2014) - Trevali Mining Corporation ("Trevali" or the "Company") (TSX:TV)(LMA: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 continue to advance and the project status remains on schedule for start-up commissioning in the first half of 2015. A summary of key current activities is provided below:

MILL

• The new 3,000-tonne-per-day Semi-Autogenous-Grinding (SAG) Mill major components are installed and the mill will be commissioned in Q1 of 2015 (Figure 1).

Figure 1: Newly installed 3,000-tpd SAG mill at Caribou: http://media3.marketwire.com/docs/984755Pic1.jpg.

• The three IsaMills installed at Caribou have been inspected by the Xstrata Process Support Group and are in excellent condition for start-up. The Company is proactively replacing the electric motor bearings for enhanced reliability during commissioning and going forward.
  
  
• The zinc and lead flotation circuits have been cleaned and repaired where necessary, and copper circuit design and tendering is nearing completion.
  
  
• All mill motors and electrical drives have been cleaned and serviced by Original Equipment Manufacturer (OEM) representatives.
  
  
• The majority of the pumps have been refurbished and/or replaced and spare pumping capacity components have been sourced from the nearby Brunswick-12 Mine and Mill complex that ceased operations in 2013.
  
  
• Plant instrumentation refurbishment is progressing as equipment becomes available and remains on track for H1-2015 Mill Commissioning.
  
  

UNDERGROUND (UG)

• The new portal construction commenced in early November and is advancing to schedule (Figure 2). Surface breakthrough is anticipated in Q1-2015 and will ultimately result in significant operational efficiencies by reducing the surface haul distance to approximately 100 metres to the Fine Mineral Bins versus the previous approximately 1.5-km surface route. It is anticipated that this will decrease haul costs, improve UG fleet availability in additional to improving winter production capabilities.