NYSE HL: $5.82 -0.02 SILVER: US $23.47 -0.20 GOLD: US $1784.55 -6.15 Investors: 800.432.5291 Français Legal/Privacy Careers Contact Responsible Mining Investors Quality Assets News & Events Our Company Overview Operating Mines Pre-Development Exploration Colorado, USA Idaho, USA Nevada, USA Aurora Fire Creek Overview & History Geology & Mining Production Reserves & Resources Exploration Hatter Graben Hollister Midas Monte Cristo Washington, USA British Columbia, Canada Quebec, Canada Durango, Mexico Fire Creek Nevada The Fire Creek mine, which Hecla acquired in July 2018, is located primarily in Lander County, Nevada, approximately 63 miles west of Elko, Nevada, overlooking Crescent Valley. The Project comprises private fee lands (both leased and owned) and unpatented lode mining claims. The land position includes approximately 15,420 acres of unpatented federal lode mining claims, 1,110 acres of private fee land and 230 acres of mineral leases. Overall, the Fire Creek land package is approximately 17,000 acres. Fire Creek is expected to be placed on care and maintenance in the second quarter of 2021. Overview & History Known activity at Fire Creek dates to 1967. Historic production included limited open pit mining and heap leaching in 1981, marginal mining of oxidized siliceous cap material from a pit and the construction of a small test heap leach operation from 1988 to 1990. Except for current operations, there has been no other production at the Fire Creek since 1990. Discovery and exploration of the epithermal veins did not occur until 2004. Klondex Mines Ltd. commenced underground mine development in 2011 and mined under a bulk sample permit starting in 2013; permits for full mine production were received in 2016. The remaining mineral reserves will be depleted, and the mine will be placed on care and maintenance in Q2 2021. Geology & Mining Gold mineralization at Fire Creek occurs in steeply dipping epithermal veins within Tertiary basalt flows and intrusive rocks. The mineralized basaltic rocks are a suite of mafic, extrusive rocks associated with the regional north-northwest-trending NNR structural zone. The NNR system has been documented in multiple geophysical and geological studies and is distinguished as a linear magnetic anomaly approximately 30 miles wide that extends 190 miles south-southeast from the Oregon-Nevada border to central Nevada. The NNR originates from the McDermitt Caldera in northwest Nevada and is likely related to impingement of the Yellowstone hot-spot on continental crust. The mineral deposit is a low-sulfidation epithermal deposit vertically zoned within high-angle northwest striking structures, hosted in a mid-Miocene basalt package. Gold mineralization occurs as shallow structurally controlled fault hosted gold mineralization in variably altered Tertiary basalts and as native gold in steeply dipping quartz-calcite veins or structures. A package of middle Miocene basalt and basaltic andesite flows has been cut by high-angle normal faults related to both the Northern Nevada Rift and Basin and Range extension that form grabens and half-grabens which are the underlying structural controls in the district. High-grade gold mineralization has been delineated between approximately 4,900 feet and 5,700 feet AMSL and is open both up and down dip as well as along strike. Lower-grade gold mineralization occurs from the surface and mineralization is open at depth. Vein textures, gangue minerals, and alteration seen at Fire Creek are typical of low-sulfidation epithermal systems. Widespread propylitic alteration grades to argillic alteration proximal to veins and/or other structural fluid conduits. Low-grade gold mineralization is often spatially associated with the argillic alteration zone surrounding the high-grade gold. Mineralization that often occurs along discrete horizons within vein structures. An opaline silica cap is discontinuously preserved at surface above the main mineralization at Fire Creek. Mineralized faults near this opaline silica were targeted by early prospecting and later shallow drilling by previous operators in the 1980’s. Fire Creek is defined by two major north-northwest striking vein arrays, each comprised of several en-echelon veins. Several new target areas outside of the known vein arrays have been defined by both gradient-array and dipole-dipole induced polarization surveys as well as VTEM geophysical surveys. Production – Nevada Operations (years ended December 31) 2019 2020 Silver (ounces) 181,741 37,443 Gold (ounces) 66,166 31,756 Cash cost per ounce of gold, after by-product credits, ($/oz) (1) $1,061 $716 Historical 2016 2017 2018 Silver (ounces) 80,593 72,283 172,301 Gold (ounces) 101,286 107,143 32,887 (footnotes) Reserves & Resources Information with respect to proven and probable ore reserves; and measured, indicated, and inferred resources is set forth below. 2020 Reserves & Resources PDF Exploration Fire Creek exploration is focused on defining and prioritizing exploration targets that have potential to expand mineralization within and near the current resources and reserves in addition to advancing district exploration targets through detailed mapping and sampling. 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