Operations

Mineral Reserves & Resources

Total Proven & Probable Mineral Reserves

Total Proven & Probable Mineral Reserves as of December 31, 2020(1,2)

  TONNAGE GRADE METAL
  Category Quantity
Mt
Zn
%
Pb
%
Ag
g/t
Zn
M lbs
Pb
M lbs
Ag
K oz
Perkoa Mine Proven & Probable 1.53 11.94 - - 403 - -
Rosh Pinah Mine Proven & Probable 11.19 5.98 1.29 21.11 1,476 319 7,599
Caribou Mine Proven & Probable 4.51 6.06 2.30 70.14 603 229 10,175
Santander Mine Proven & Probable 0.65 4.29 0.31 21.26 61 4 443
Total Proven & Probable 17.88 6.45 1.40 31.68 2,543 553 18,217

(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, 2020(1,2,3)

  TONNAGE GRADE METAL
  Category Quantity
Mt
Zn
%
Pb
%
Ag
g/t
Zn
M lbs
Pb
M lbs
Ag
K oz
Perkoa Mine Measured & Indicated 3.54 11.98 - - 936 - -
Rosh Pinah Mine Measured & Indicated 18.13 7.50 1.87 27.71 2,997 748 16,148
Caribou Mine Measured & Indicated 12.52 6.52 2.47 73.25 1,799 682 29,476
Santander Mine Measured & Indicated 2.71 4.66 0.49 26.42 278 29 2,302
Santander Pipe Project Measured & Indicated 3.48 6.59 0.02 12.41 506 2 1,388
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 53.96 7.05 1.82 38.74 8,384 2,160 67,208

(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, 2020(1,2,3)

  TONNAGE GRADE METAL
  Category Quantity
Mt
Zn
%
Pb
%
Ag
g/t
Zn
M lbs
Pb
M lbs
Ag
K oz
Perkoa Mine Inferred 0.57 8.68 0.00 0.00 110 - -
Rosh Pinah Mine Inferred 4.01 7.27 1.50 28.21 642 133 3,635
Caribou Mine Inferred 2.65 5.72 2.39 73.86 334 140 6,288
Santander Mine Inferred 1.16 4.01 0.21 21.69 103 5 809
Santander Pipe Project Inferred 0.93 5.15 0.01 7.54 106 0 225
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 18.80 5.86 1.59 32.98 2,429 659 19,934

(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.