Hecla Mining Company · NYSE:HL

Hecla Mining — PDAC 2018

13 slides from Hecla Mining's conference presentation, Mar 6, 2018

1. Slide 1: PDAC 2018: Creating Value Through Innovative Mining

   March 2018 NYSE:HL PDAC 2018 Creating Value Through Innovative Mining

2. Slide 2: Cautionary Statements

   Cautionary Statements NYSE:HL Cautionary Statement Regarding Forward Looking Statements, This presentation contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are

3. Slide 3: Creating Value

   A SILVER, Gold & Base Metals Company Our long-lived, low-cost mines create opportunities NYSE:HL Creating Value  Mill Run Throughput  985 Autonomous Truck  Ventilation on Demand Productivity Reducing Costs Improvements New New Mines Discoveries  San Sebastian Sulphides  160 Zone  Rock Creek 

4. Slide 4: Labor is Largest Direct Production Cost

   Labor is Largest Direct Production Cost Increasing productivity has highest impact on the bottom line NYSE:HL Estimated annual cost breakdown -4-

5. Slide 5: Creating Value During The Shift Change

   Creating Value During The Shift Change Automated operation during shift change NYSE:HL Blasting & Blasting & Shift Change Shift Change Utilization Operating Operating Operating Hours in the Day -5-

6. Slide 6: First We WIFI the Mines: Greens Creek

   First We WIFI the Mines: Greens Creek Data collection is the key to increasing productivity & safety NYSE:HL Improving Mining Based On Data Ventilation on Demand In Testing  14 of 54 Greens Creek fans on test with variable frequency drives  Expected $23,000 savings per fan per year; approximately

7. Slide 7: Ventilation on Demand and Teleremote LHD

   Ventilation on Demand and Teleremote LHD Increase productivity and lower costs NYSE:HL –7–

8. Slide 8: Significantly Improved Recoveries

   Significantly Improved Recoveries Expect further improvements from Woodgrove SFR flotation cells NYSE:HL  Increases payable silver and gold by having it report to bulk con instead of the zinc con  Cost approx. $1.3 million  Payback expected in 6-12 months  IRR in excess of 100%  Commissioned in

9. Slide 9: Lucky Friday Testing Battery Powered LHD

   Lucky Friday Testing Battery Powered LHD Could reduce ventilation needs versus diesel NYSE:HL -9-

10. Slide 10: Continuous Mechanical Cutting To Eliminate Drill/Blast

    Continuous Mechanical Cutting To Eliminate Drill/Blast A 5-Year investment that could revolutionize the Lucky Friday NYSE:HL Could Improve Safety and Productivity Atlas Copco Test Mine 2016 3D Graphic of Remote Vein Miner -10-

11. Slide 11: Casa Berardi: Autonomous Truck Operating

    Casa Berardi: Autonomous Truck Operating Truck runs 24 hours a day; cost savings expected NYSE:HL Control room Loading 40-tonne autonomous Sandvik truck -11-

12. Slide 12: Autonomous Haulage and Hoisting

    Autonomous Haulage and Hoisting NYSE:HL -12-

13. Slide 13: Thank You

    MINING COMPANY NYSE:HL =] \o) > = = © <= = -13-

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