Operations

Mineral Reserves & Resources

Total Proven & Probable Mineral Reserves

Total Proven & Probable Mineral Reserves as of December 31, 2021(1,2)

    Grade Metal
Mine Category Quantity Zn Pb Ag Zn Pb Ag
Mt % % g/t M lbs M lbs K oz
Perkoa Mine Proven & Probable 0.96 10.86  -    -   229  -    -  
Rosh Pinah Mine Proven & Probable 16.74 5.78 1.26 19.74 2,135 466 10,625
Caribou Mine Proven & Probable 4.41 5.85 2.17 65.60 568 211 9,291
Total Proven & Probable 22.11 6.02 1.39 28.02  2,932  677  19,916

(1)  For additional detail respecting the Mineral Reserve contained zinc, lead and silver grades, see "Detailed Mineral Reserve and Mineral Resource Disclosure" within this news release.
(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 ownership interest is 90% of Perkoa and 90% of Rosh Pinah.

Total Measured & Indicated Mineral Resources

Total Measured & Indicated Mineral Resources as of December 31, 2021(1,2,3)

    Grade Metal
Project Category Quantity Mt Zn
%
Pb
%
Ag
g/t
Zn
M lbs
Pb
M lbs
Ag
K oz
Perkoa Mine Measured & Indicated 2.71 11.29  -    -    675  -    -  
Rosh Pinah Mine Measured & Indicated 19.94 7.38 1.83 27.71  3,244  805  17,764
Caribou Mine Measured & Indicated 11.73 6.45 2.46 72.97  1,667  636  27,510
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 47.96 7.05 2.02 40.97  7,454 2,141  63,167

(1)   For additional detail respecting the Mineral Resources contained zinc, lead and silver grades, see "Detailed Mineral Reserve and Mineral Resource Disclosure" within this news release.
(2)   All Mineral Resources referred to in this news release are inclusive of stated Mineral Reserves. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
(3)   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 ownership interest is 90% of Perkoa and 90% of Rosh Pinah

Total Inferred Mineral Resources

Table 3. Total Inferred Mineral Resources as of December 31, 2021(1,2,3)

    Grade Metal
Project Category Quantity
Mt
Zn
%
Pb
%
Ag
g/t
Zn
M lbs
Pb
M lbs
Ag
K oz
Perkoa Mine Inferred 0.47 8.51 0.00 0.00  88  -    -  
Rosh Pinah Mine Inferred 0.78 8.09 1.41 47.36  139  24  1,183
Caribou Mine Inferred 2.61 5.68 2.40 72.61  327  138  6,099
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 13.34 5.74 1.85 37.91  1,689  543 16,258

(1) For additional detail respecting the Mineral Resources contained zinc, lead and silver grades, see "Detailed Mineral Reserve and Mineral Resource Disclosure" within this news release.
(2) All Mineral Resources referred to in this news release are inclusive of stated Mineral Reserves. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
(3) 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 ownership interest is 90% of Perkoa and 90% of Rosh Pinah.