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At Trevali, we are asking ourselves some big questions about what it means to be a global mining company in today’s world.

We know that modern society needs mineral resources and the products that mining helps create.

As times change, society’s expectations of us change too.

Expectations about environmental responsibility.

Around what it means to be a good corporate citizen.

About being a company that is sustainable for the long-term.

And one that benefits its employees, its communities and its shareholders.

At Trevali, we are excited by these evolving expectations. They inspire innovative ideas and create new opportunities for us to enhance how our business operates.

Motivated by the potential that these questions present, we are focused on constant, incremental improvements in our business. Bringing creativity, agility and innovation into the very heart of the company. Operating efficiently and with the highest of safety standards. We are working to make ongoing improvements that contribute to achieving larger long-term goals.

By asking, and answering, these questions, we will create a different kind of mining company, and a new Trevali.

We embark on this journey with the key ingredients for success: strong assets, potential for resource expansion, a great balance sheet, and an engaged team of professionals.

As a reflection of our new vision, we are also launching a new corporate identity.

We are just getting started. Watch this space.

Trevali – the Future of Mining

Signature

Ricus Grimbeek
President & Chief Executive Officer

Mineral Reserves and Resources

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Mineral Reserves and Resources

Total Proven & Probable Mineral Reserves

Total Proven & Probable Mineral Reserves as at December 31, 2018(1,2)



Tonnage Grade Metal
Mine Category Quantity Mt Zn % Pb % Ag g/t Zn M lbs Pb M lbs Ag K oz
Perkoa Mine Proven & Probable 3.09 12.69 - - 864 - -
Rosh Pinah Mine Proven & Probable 8.49 6.73 1.52 21.90 1,260 285 5,978
Caribou Mine Proven & Probable 3.29 6.37 2.43 73.20 463 176 7,753
Santander Mine Proven & Probable 2.34 4.67 0.64 31.86 240 33 2,393
Total Proven & Probable 17.2 7.45 1.59 35.52 2,827 494 16,124

(1) The technical report entitled “Technical Report on the Caribou Mine, Bathurst, New Brunswick, Canada” dated May 31, 2018, is the current technical report for the Caribou property.
(2) The M lbs (million pounds) and K oz (thousand ounces) contained metals is the total Proven + Probable Mineral Reserve estimation of all the mines on a 100% basis. Trevali’s proportionate ownership interest pursuant to the applicable joint venture/option agreements is: Perkoa (90%); and Rosh Pinah (90%); Santander (100%); Caribou (100%).”

Total Measured & Indicated Mineral Resources

Total Measured & Indicated Mineral Resources as at December 31, 2018(1,2)



Tonnage Grade Metal
Project Category Quantity Mt Zn % Pb % Ag g/t Zn M lbs Pb M lbs Ag K oz
Perkoa Mine Measured & Indicated 4.88 13.26 - - 1,427 - -
Rosh Pinah Mine Measured & Indicated 11.32 7.82 1.76 26.13 1,950 439 9,509
Caribou Mine Measured & Indicated 9.58 6.68 2.55 75.60 1,411 539 23,285
Santander Mine Measured & Indicated 3.08 5.34 0.74 32.79 362 50 3,244
Santander Pipe Project Indicated 2.77 6.81 0.09 13.39 416 5 1,193
Restigouche Project Measured & Indicated 1.08 5.00 3.30 46.30 119 79 1,613
Halfmile Project Measured & Indicated 7.80 6.94 2.35 36.00 1,199 407 8,980
Stratmat Project Indicated 4.70 5.30 2.10 49.00 550 214 7,300
Total Measured & Indicated 45.21 7.45 1.74 38.03 7,435 1,733 55,124

(1) The M lbs (million pounds) and K oz (thousand ounces) contained metals is the total Measured + Indicated Mineral Resource estimation of all mines and projects on a 100% basis. Trevali’s proportionate ownership interest pursuant to the applicable joint venture/option agreements is: Perkoa (90%); and Rosh Pinah (90%); Santander (100%); Caribou (100%).
(2) All Mineral Resources are inclusive of Mineral Reserves. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.

Total Inferred Mineral Resources

Total Inferred Mineral Resources as of December 31, 2018(1)



Tonnage Grade Metal
Project Category Quantity Mt Zn % Pb % Ag g/t Zn M lbs Pb M lbs Ag K oz
Perkoa Mine Inferred 1.21 10.21 - - 271 - -
Rosh Pinah Mine Inferred 5.56 7.11 1.13 24.93 872 139 4,457
Caribou Mine Inferred 5.12 6.42 2.65 78.52 725 299 12,925
Santander Mine Inferred 1.43 4.60 0.21 22.19 145 7 1,022
Santander Pipe Project Inferred 0.82 5.59 0.02 10.00 101 1 263
Restigouche Project Inferred 0.58 6.10 4.30 67.83 77 55 1,256
Halfmile Project Inferred 6.50 5.62 1.51 23.00 806 216 4,720
Stratmat Project Inferred 2.40 4.80 2.10 39.00 252 110 3,000
Total Inferred 23.61 6.24 1.59 36.54 3,249 825 27,643

(1) The M lbs (million pounds) and K oz (thousand ounces) contained metals is the total Inferred Mineral Resource estimation of all mines and projects on a 100% basis. Trevali’s proportionate ownership interest pursuant to the applicable joint venture/option agreements is: Perkoa (90%); and Rosh Pinah (90%); Santander (100%); Caribou (100%).