Slide 1: Closure Planning – Marathon Palladium Project
November 2021 Closure Planning MARATHON PALLADIUM PROJECT
Slide 2: Project Summary - Review
PROJECT SUMMARY - REVIEW • Three planned open pits (central, north and south) • Measured and indicated resources 179.2 M tonnes • PSMF, water management ponds and stockpiles • Mine rock storage area • 85-90% non-acid generating mine rock • Long term PAG storage in PSMF and open pits • Process plant
Slide 3: Mine Rehabilitation Code of Ontario
MINE REHABILITATION CODE OF ONTARIO Mine Rehabilitation Code of Ontario (Code) is published in Ontario Regulation 240/00 (as amended) and provides standards for mine rehabilitation. The Code addresses all components of a mine development to ensure a site is safe, physically stable and chemically sta
Slide 4: Rehabilitation Objectives from the Code
REHABILITATION OBJECTIVES FROM THE CODE • Reclaim land within the Project footprint so it is physically stable (erosion protection) and chemically stable to prevent acid generation and metal leaching • Maximize future use by plants and animals • Reduce impacts to the natural environment, with progre
Slide 5: Closure Planning - Overview
CLOSURE PLANNING - OVERVIEW 6
Slide 6: Rehabilitation Plan Overview - Revegetation
REHABILITATION PLAN OVERVIEW - REVEGETATION A re-vegetation program will be implemented that: Researchers at Lakehead University conducted • Stabilizes disturbed surface areas to minimize erosion; greenhouse revegetation trials on Marathon • Provides a self-sustaining cover; PGM tailings during the
Slide 7: Rehabilitation Plan Overview - Water Management
REHABILITATION PLAN OVERVIEW - WATER MANAGEMENT Section 38 to 40 of the Code protects water quality. The surface water quality of a closed out site shall meet the Provincial Water Quality Objectives or, where the proponent establishes that it is not practicable to meet the objectives set out therein
Slide 8: Rehabilitation Plan Overview – Open Pits
REHABILITATION PLAN OVERVIEW – OPEN PITS • South and Central pits that have been utilized for mine rock storage or for process solids storage will be capped with Type 1 (NAG) mine rock cover. • Stream channels and fish habitat will be created and new drainage channels will be established so that wat
Slide 9: Rehabilitation Plan Overview – MRSA
REHABILITATION PLAN OVERVIEW – MRSA • Contour the intermediate slope benches, stockpile crest areas, access routes, to remove any areas of concentrated runoff • Protect against erosion and sediment production • Minimize standing water on top of MRSA • Establish vegetative cover over the crest and sl
Slide 10: Figure 1.5-5
Figure 1.5-5 GENERATIONPGM
Slide 11: Rehabilitation Plan Overview - PSMF
REHABILITATION PLAN OVERVIEW - PSMF • Contour the downstream slopes of the PSMF embankments to manage eroision • Establish vegetation on re-graded embankment areas • Establish drainage channels to control surface runoff and reduce standing water • Runoff from cell 2 will continue to drain to cell 1
Slide 12: Rehabilitation Plan Overview - Buildings and Roads
REHABILITATION PLAN OVERVIEW - BUILDINGS AND ROADS • All buildings, power lines, pipelines, waterlines and other structures will be dismantled and removed. • Concrete rubble will be deposited in the main pit. • Material will be recycled, sold, removed to the on- site disposal area or removed off-sit
Slide 13: Progressive Rehabilitation During Life of Mine
PROGRESSIVE REHABILITATION DURING LIFE OF MINE • Set aside oversize boulders to use for boulder fence around pit. • Establish minimum 2 points of egress from pit for when it is flooded at closure. • Soil stripping and strategic stockpiling and planting with non-invasive legume ground cover for soil
Slide 14: Progressive Rehabilitation During Life of Mine
PROGRESSIVE REHABILITATION DURING LIFE OF MINE • Minimize waste on-site, remove equipment as it is taken out of service • Minimize water in storage in PSMF and WMP • To the maximum extent practical, progressive reclamation of the PSMF and associated structures will be implemented, especially with re
Slide 15: Long Term Monitoring
LONG TERM MONITORING Year 5 to 30 A detailed monitoring plan will be developed by independent qualified professionals that will focus on evaluating: • The physical integrity of permanent man-made structures (e.g., dam safety inspections) • The relative success of the implementation of closure and re
Slide 16: Closure Cost and Financial Assurance
Closure Cost and Financial Assurance Required financial assurance provisions: • Closure plan/Mining Act for all rehabilitation items in the closure plan • Estimated to be $60 million, refined estimate in progress • Renewal fees under Crown Forest Sustainability Act for re-forestation • Fisheries Act
Slide 17: More Information on the Project
IONPGM ION y More Information on the Project can be found at www.genmining.com and the Impact Assessment Registry at https://iaac-aeic.gc.ca/050/evaluations/proj/54755?culture=en-CA If you have additional questions, please email us at comments@genpgm.com