Mineral Reserves and Resources

Total Proven & Probable Mineral Reserves as of December 31, 2020^(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	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 as of December 31, 2020^(1,2,3)

		TONNAGE	Grade			Metal
Mine	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

Table 3. Total Inferred Mineral Resources as of December 31, 2020^(1,2,3)

		TONNAGE	Grade			Metal
Mine	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.