Trevali intersects significant massive sulphide mineralization outside current Caribou Mine resource - Seite 2

To view Figure 2: 3D long view of the Caribou mine, please visit this link: http://media3.marketwire.com/docs/1088579_FIGURE-2.pdf

Trevali Mining added to S&P/TSX Equal Weight Global Base Metals Index

Effective at the open of trading on Monday, March 20, 2017, Trevali will be added to the S&P/TSX Equal Weight Global Base Metals Index.

The S&P/TSX Equal Weight Global Base Metals Index is the equal weighted version of the S&P/TSX Global Base Metals Index, a benchmark of securities involved in the production or extraction of base metals, and a subset of the S&P/TSX Global Mining Index.

Qualified Person and Quality Control/Quality Assurance

EurGeol Dr. Mark D. Cruise, Trevali's President and CEO and Daniel Marinov, P.Geo, Trevali's VP Exploration, 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. Mr. Marinov is responsible for all aspects of the work, including the quality control/quality assurance programs. Dr. Cruise is not independent of the Company, as he is an officer, director and shareholder. Mr. Marinov is not independent of the Company as he is an officer and shareholder. Drill core samples were processed and assayed in the Santander mine onsite laboratory. Zinc, lead and silver, assays were obtained by Aqua-Regia dissolution followed by Atomic Absorption measurement. Values of lead and zinc over 15% are assayed by volumetric method. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Quality control is further assured by the use of international and in-house standards. Blind certified reference material is inserted at regular intervals into the sample sequence by Trevali personnel in order to independently assess analytical accuracy. The onsite laboratory is outsourced and managed by SGS-Peru personnel. SGS-Peru's quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025: 1999. Finally, representative blind duplicate samples are routinely forwarded to an ISO compliant third party laboratory for external quality control.