HECLA MINING CODE

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The map below shows the locations of our operations and our exploration projects, as well as our corporate offices located in Coeur d’Alene, Idaho; Vancouver, British Columbia; Juneau, Alaska; Wallace, Idaho; Val d'Or, Quebec; Durango, Mexico and Whitehorse, Yukon.

The following table summarizes our aggregate metal quantities produced and sold for the last three years:

Hecla is the operator at all mines and exploration properties. Mineral processing plants and related facilities are part of the infrastructure at each operating mine.

The following table summarizes the in-situ mineral reserves for all properties as of December 31, 2023:

(1)

The term “reserve” means an estimate of tonnage and grade or quality of indicated and measured mineral resources that, in the opinion of the qualified person, can be the basis of an economically viable project. More specifically, it is the economically mineable part of a measured or indicated mineral resource, which includes diluting materials and allowances for losses that may occur when the material is mined or extracted. The term “proven reserves” means the economically mineable part of a measured mineral resource and can only result from conversion of a measured mineral resource. See footnotes 7 and 8 below.

(2)

Mineral reserves are based on the following prices unless otherwise stated: $17.00/oz for silver, $1,650/oz for gold, $0.90/lb for lead and $1.15/lb for zinc. Underground mineral reserves at Casa Berardi were based on a gold price of $1,850/oz. All Mineral Reserves are reported in-situ with estimates of mining dilution and mining loss.

(3)

Due to multiple ore metals, and complex combinations of ore types, metal ratios and metallurgical performances at Greens Creek, the cutoff grade is expressed in terms of net smelter return (“NSR”), rather than metal grade. The reserve NSR cut-off values for Greens Creek are $230/ton for all zones except the Gallagher Zone at $235/ton; metallurgical recoveries (actual 2023): 80% for silver, 74% for gold, 82% for lead, and 89% for zinc.

(4)

Due to multiple ore metals, and complex combinations of ore types, metal ratios and metallurgical performances at Lucky Friday, the cutoff grade is expressed in terms of NSR, rather than metal grade. The reserve NSR cut-off values for Lucky Friday are $241.34 for the 30 Vein and $268.67 for the Intermediate Veins; metallurgical recoveries (actual 2023): 96% for silver, 95% for lead, and 85% for zinc.

(5)

The average reserve cut-off grades at Casa Berardi are 0.11 oz/ton gold underground and 0.03 oz/ton gold for open pit. Metallurgical recovery (actual 2023): 85% for gold; US$/CAN$ exchange rate: 1:1.3.

(6)

Due to multiple ore metals, and complex combinations of ore types, metal ratios and metallurgical performances at Keno Hill, the cutoff grade is expressed in terms of NSR, rather than metal grade. The reserve NSR cut-off value at Keno Hill is $244.24/ton (CAN$350/tonne), Metallurgical recovery: (actual 2023) 96% for silver, 93% for lead, 81% for zinc; US$/CAN$ exchange rate: 1:1.3.

(7)

The term “probable reserves” means the economically mineable part of an indicated and, in some cases, a measured mineral resource. See footnotes 8 and 9 below.

The following table summarizes the in-situ mineral resources(8) for all properties, exclusive of mineral reserves, as of December 31, 2023:

(8)

The term "mineral resources" means a concentration or occurrence of material of economic interest in or on the Earth's crust in such form, grade or quality, and quantity that there are reasonable prospects for economic extraction. A mineral resource is a reasonable estimate of mineralization, taking into account relevant factors such as cut-off grade, likely mining dimensions, location or continuity, that, with the assumed and justifiable technical and economic conditions, is likely to, in whole or in part, become economically extractable. It is not merely an inventory of all mineralization drilled or sampled.

(9)

The term "measured resources" means that part of a mineral resource for which quantity and grade or quality are estimated on the basis of conclusive geological evidence and sampling. The level of geological certainty associated with a measured mineral resource is sufficient to allow a qualified person to apply modifying factors in sufficient detail to support detailed mine planning and final evaluation of the economic viability of the deposit. Because a measured mineral resource has a higher level of confidence than the level of confidence of either an indicated mineral resource or an inferred mineral resource, a measured mineral resource may be converted to a proven mineral reserve or to a probable mineral reserve.

(10)

The term "indicated resources" means that part of a mineral resource for which quantity and grade or quality are estimated on the basis of adequate geological evidence and sampling. The level of geological certainty associated with an indicated mineral resource is sufficient to allow a qualified person to apply modifying factors in sufficient detail to support mine planning and evaluation of the economic viability of the deposit. Because an indicated mineral resource has a lower level of confidence than the level of confidence of a measured mineral resource, an indicated mineral resource may only be converted to a probable mineral reserve.

(11)

The term "inferred resources" means that part of a mineral resource for which quantity and grade or quality are estimated on the basis of limited geological evidence and sampling. The level of geological uncertainty associated with an inferred mineral resource is too high to apply relevant technical and economic factors likely to influence the prospects of economic extraction in a manner useful for evaluation of economic viability. Because an inferred mineral resource has the lowest level of geological confidence of all mineral resources, which prevents the application of the modifying factors in a manner useful for evaluation of economic viability, an inferred mineral resource may not be considered when assessing the economic viability of a mining project, and may not be converted to a mineral reserve.

(12)

Mineral resources for operating properties are based on $1,750/oz for gold, $21.00/oz for silver, $1.15/lb for lead, $1.35/lb for zinc and $3.00/lb for copper, unless otherwise stated. Mineral resources for non-operating resource projects are based on $1,700/oz for gold, $21.00/oz for silver, $1.15/lb for lead, $1.35/lb for zinc and $3.00/lb for copper, unless otherwise stated. Mineral resources are reported for all resource projects regardless of the percentage of total measured and indicated resource.

(13)

The resource NSR cut-off values for Greens Creek are $230/ton for all zones except the Gallagher Zone at $235/ton; metallurgical recoveries (actual 2023): 80% for silver, 74% for gold, 82% for lead, and 89% for zinc.

(14)

The resource NSR cut-off values for Lucky Friday are $200.57 for the 30 Vein, $227.90 for the Intermediate Veins and $198.48 for the Lucky Friday Vein; metallurgical recoveries (actual 2023): 96% for silver, 95% for lead, and 85% for zinc.

(15)

The average resource cut-off grades at Casa Berardi are 0.12 oz/ton gold for underground and 0.03 oz/ton gold for open pit; metallurgical recovery (actual 2023) 85% for gold; US$/CAN$ exchange rate: 1:1.3.

(16)

The resource NSR cut-off value at Keno Hill is $129.10/ton (CAN$185/tonne); using minimum width of 4.9 feet (1.5m); metallurgical recovery (actual 2023): 96% for silver, 93% for lead, 81% for zinc; US$/CAN$ exchange rate: 1:1.3.

(17)

Indicated resources for most zones at San Sebastian based on $1,500/oz gold, $21.00/oz silver, $1.15/lb lead, $1.35/lb zinc and $3.00/lb copper using an NSR cut-off value of $90.72/ton ($100/tonne); $1,700/oz gold used for Toro, Bronco, and Tigre zones. Metallurgical recoveries based on grade dependent recovery curves: recoveries at the mean resource grade average 89% for silver and 84% for gold for oxide material and 85% for silver, 83% for gold, 81% for lead, 86% for zinc, and 83% for copper for sulfide material. Resources reported at a minimum mining width of 8.2 feet (2.5m) for Middle Vein, North Vein, and East Francine, 6.5ft (1.98m) for El Toro, El Bronco, and El Tigre, and 4.9 feet (1.5 m) for Hugh Zone and Andrea.

(18)

Mineral resources for Fire Creek, Hollister and Midas are reported using $1,500/oz for gold and $21.00/oz for silver prices, unless otherwise noted. A minimum mining width is defined as four feet or the vein true thickness plus two feet, whichever is greater.

(19)

Fire Creek mineral resources are reported at a gold equivalent cut-off grade of 0.283 oz/ton. Metallurgical recoveries: 90% for gold and 70% for silver.

(20)

Hollister mineral resources, including the Hatter Graben are reported at a gold equivalent cut-off grade of 0.238 oz/ton. Metallurgical recoveries: 88% for gold and 66% for silver.

(21)

Midas mineral resources are reported at a gold equivalent cut-off grade of 0.237 oz/ton. Metallurgical recoveries: 90% for gold and 70% for silver. A gold-equivalent cut-off grade of 0.1 oz/ton and a gold price of $1,700/oz used for Sinter Zone with resources undiluted.

(22)

Measured, indicated and inferred resources at Heva and Hosco are based on $1,500/oz for gold. Resources are without dilution or material loss at a gold cut-off grade of 0.01 oz/ton (0.33 g/tonne) for open pit and 0.088 oz/ton (3.0 g/tonne) for underground. Metallurgical recovery: Heva: 95% for gold, Hosco: 88% for gold.

(23)

Indicated and Inferred resources at the Star property are reported using a minimum mining width of 4.3 feet and NSR cut-off value of $150/ton; Metallurgical recovery: 93% for silver, 93% for lead, and 87% for zinc.

(24)

Inferred open-pit resources for Fire Creek calculated November 30, 2017 using gold and silver recoveries of 65% and 30% for oxide material and 60% and 25% for mixed oxide-sulfide material. Indicated Resources reclassified as Inferred in 2019. Open pit resources are calculated at $1,400 for gold and $19.83 for silver and cut-off grade of 0.01 Au Equivalent oz/ton and is inclusive of 10% mining dilution and 5% ore loss. Open pit mineral resources exclusive of underground mineral resources.

(25)

Inferred resources reported at a minimum mining width of 6.0 feet for Bulldog and an NSR cut-off value of $175/ton and 5.0 feet for Equity and North Amethyst veins at an NSR cut-off value of $100/ton; based on $1,700/oz for gold, $21.00/oz for silver, $1.15/lb for lead, and $1.35/lb for zinc. Metallurgical recoveries based on grade dependent recovery curves: recoveries at the mean resource grade average 89% for silver and 74% for lead and 81% zinc for the Bulldog and a constant 85% for gold and 85% for silver for North Amethyst and Equity.

(26)

Inferred resource at Monte Cristo reported at a minimum mining width of 5.0 feet; resources based on $1,400/oz for gold, $26.50/oz for silver using a 0.06 oz/ton gold cut-off grade. Metallurgical recovery: 90% for gold and 90% for silver.

(27)

Inferred resource at Rock Creek reported at a minimum thickness of 15 feet and an NSR cut-off value of $24.50/ton; Metallurgical recoveries: 88% for silver and 92% for copper. Resources adjusted based on mining restrictions as defined by USFS, Kootenai National Forest in the June 2003 'Record of Decision, Rock Creek Project'.

(28)

Inferred resource at the Libby Exploration project reported at a minimum thickness of 15 feet and an NSR cut-off value of $24.50/ton; Metallurgical recoveries: 88% for silver and 92% for copper. Resources adjusted based on mining restrictions as defined by USFS, Kootenai National Forest, Montana DEQ in December 2015 'Joint Final EIS, Montanore Project' and the February 2016 U.S Forest Service - Kootenai National Forest 'Record of Decision, Montanore Project'.

(29)

Resources at the Rackla-Tiger project are based on a gold price of $1,650/oz, metallurgical recovery of 95% for gold, and cut-off grades of 0.02 oz/ton gold for the open pit portion of the resources and 0.04 oz/ton gold for the underground portion of the resources.

(30)

Resources at the Rackla-Osiris project are based on a gold price of $1,850/oz, metallurgical recovery of 83% for gold, and cut-off grade of 0.03 oz/ton gold for the open pit portion of the resources and 0.06 oz/ton gold for the underground portion of the resources.

Individual Properties

MATERIAL OPERATING PROPERTIES