Perpetua Resources Corp. · TSX:PPTA

Perpetua Resources — Investor Presentation (December 2020)

7 slides from Perpetua Resources's investor presentation, December 2020

  1. Slide 1: Legacy Yellow Pine Pit

    LEGACY YELLOW PINE PIT During the World War II era, the East Fork of the South Fork of the Salmon River (EFSFSR) was diverted to facilitate mining of the Yellow Pine pit, cutting off fish passage. TODAY The East Fork of the South Fork of the Salmon River flows directly into the Yellow Pine pit, bloc

  2. Slide 2: Yellow Pine Pit Restoration

    YELLOW PINE PIT RESTORATION CURRENT Closure INTERMEDIATE RESTORATION The East Fork of the South Fork of the A 0.9-mile tunnel fishway will allow fish to Backfilling the Yellow Pine pit will Salmon River flows into the abandoned swim back to historical spawning areas allow reestablishment of a natura

  3. Slide 3: Current Conditions

    CURRENT CONDITIONS Rendering of existing Yellow Pine pit looking upstream EFSFSR Fish Barrier Yellow Pine Pit 3

  4. Slide 4: Interim Fish Passage - EFSFSR

    INTERIM FISH PASSAGE - EFSFSR Fishway Details – 2’ high fish weir within 4’ weir – 5’ divider wall – Weir anchored to bedrock/tunnel lining – Divider wall similarly anchored – Weir spacing 22’ @ 4.5% and 66’ @ 1.5% 4

  5. Slide 5: River Restoration Early

    RIVER RESTORATION EARLY OVER 12 MILES OF RESTORED & ENHANCED HABITAT Open a minimum of 3.4 Miles of additional habitat • Restore migratory fish passage through YPP to upstream reaches • Target isolated spawning and rearing habitat creation • Allow geomorphically appropriate natural channel process (

  6. Slide 6: River Restoration Early

    RIVER RESTORATION EARLY TA (ts: ve Sores a0 asswerons. ¢ ~ #] \ 1. MINE CLOSURE GROUND SURFACE CONTOUR INTERVAL: 25° MAJORS, 5° MINORS. 4 “ KS \ 2. FINAL GRADE OF MINE CLOSURE GROUND SURFACE INCLUDING THE YELLOW PINE PIT BACKFILL GRADING CONSIDERED PRELIMINARY AND WILL CHANGE IN FUTURE DESIGN PHASES

  7. Slide 7: Backfill and Restoration Begins in Yr 7

    BACKFILL AND RESTORATION BEGINS IN YR 7 7

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