FINAL NAL CLOSURE OSURE AND ND RECLAMA ECLAMATION TION PL PLAN MVLWB Technical Session Snap Lake Mine Final Closure, and Water Licence and Land Permit Renewal July 16 to 18, 2019 PUBLIC LIC PRESEN ENTATION ION
CONCEPTS CEPTS FOR R DEVELOP OPMENT ENT OF THE FCRP RP • FCRP is based on MVLWB guidance documents • Overall closure goal : To return the site and affected areas around the Mine to technically viable and, where practicable, self-sustaining ecosystems that are compatible with a healthy environment and with human activities. • Key closure principles : - Physical stability - Chemical stability - No long-term active care - Compatibility with land use in surrounding areas • Incorporates stakeholder feedback received through TK workshops, WG sessions, and community visits • Builds upon closure design concepts developed in ICRP v3.2, and includes: - Description of site closure conditions and summary of options and engineering design - Post-closure monitoring plans - Integrated schedule of activities - Approach to post-closure site assessment • SMART closur ure e criter eria ia have been developed 1
OBJEC ECTI TIVES ES BASED D APPROACH CH TO CLOSUR SURE PLANNING MVLWB Approved Provided in FCRP Provided in FCRP Provided in FCRP; incorporates feedback from Nov meeting 2
MINE NE CLOSURE OSURE OBJECTIVES BJECTIVES
CATE TEGO GORI RIES ES AND COMPON ONENT ENTS S FOR R CLOSURE SURE Infras astruc tructure ure (I): Site Wide e (SW): • Airstrip • Includes everything on site • Roads Water management structures (sumps, ditches, and water • North h Pile e (NP): management pond) • Water treatment plant • Entire structure of the North Pile • Buildings • Water management structures are an • Sewage treatment plant infrastructure component Processing facilities • • Rock pads Under dergr groun ound d Mine e (UG): • Laydown areas • Exploration pits • All aspects of the underground mine that are • Vent and portal structures at surface below ground. Quarry • • Vent and portal openings are an • Diffuser and related piping infrastructure component 4
SEVEN SITE WIDE (SW) OBJECTIVES SW1 – Dust levels safe for people, vegetation, aquatic life and wildlife. SW2 - Drainage pathways for surface runoff are physically stable. SW3 - Surface runoff and seepage water quality that is safe for people, vegetation, aquatic life, and wildlife. SW4 - Mine areas are physically stable and safe for use by people and wildlife. SW5 - Landscape features (shape and vegetation) match aesthetics of the surrounding natural area. SW6 - Safe passage and use for Caribou and other wildlife. SW7 - Re-vegetation targeted to priority areas. 5
INFRASTRUCTURE (I) OBJECTIVES I1 – Prevent remaining infrastructure from contaminating land or water. I2 – On-site disposal areas are safe for people, wildlife, and vegetation. I3 – Contaminated soils and waste disposal areas that cannot contaminate land and water. 6
NORTH PILE (NP) OBJECTIVES NP1 – Prevent PK from entering the surrounding terrestrial and aquatic environment. NP2 – Physically stable PK containment area to limit risk of failure that would affect safety of people or wildlife. 7
UNDERGROUND (UG) OBJECTIVES UG1 – Flooding of the underground mine will have no impacts to aquatic habitat and community in source lakes. UG2 – Underground mine should not contribute to the contamination of ground or surface water. UG3 – Underground mine workings are physically stable. 8
TOTAL AL IMAGE GE POST-CLOSURE SITE CONDITION
REVEGE EGETATION ON AND SITE E WATER ER FLOW – AREAS AS 10 10
PROPO POSE SED D PROJECT JECT EXECUT CUTION ROADM DMAP AP – BASE E CASE Activity 2019 2019 2020 2020 2021 2021 2022 2022 2023 2023 2024 2024 2025 2025 2026 2026 2027 2027 2028 2028 2029 2029 2030 2030 2031 2031 2032 2032 2033 2033 2034 2034 2035 2035-2045 2045 Water Licence Process Winter Road 1 Water Management System and North Pile Cover Construction (Influent Storage Ponds, Wetlands and spillways) Monitoring of System Biota Growth and Denitrification Demolition Winter Road Active Demolition Revegetation, Landforming and Site Stabilization Final Winter Road Owners Team Fully Activated Extended Care and Maintenance Post Closure 11 11
KEY Y QUES UESTIO TIONS NS ON FCRP RP – OBJEC JECTI TIVES, VES, CRI RITERIA TERIA & & MONIT NITORING RING
KEY QUES ESTIONS TIONS RAIS ISED ED ON THE HE SMART T FCRP RP OBJE JECTIVES CTIVES, , CRIT ITERI ERIA AND MONITORI RING • There were three themes that were raised during the initial review: • Linkage ages betw etwee een Objectiv jectives, s, Crit iter eria ia and Closu osure e Ac Activ ivit itie ies • Linkage ages betw etwee een Objectiv jectives, s, Crit iter eria ia and Monit itor orin ing Plans • Monit itor oring Durat atio ions s in Closu osure e Crit iter eria ia • Integratio ations of Engage ageme ment t Data ta and Future e Use e and d Ae Aesth sthetic tics s Principle iple • The following slides will address some of these themes to provide additional clarity on the linkages and how the entire application (Water Licence, Land Use Permit, FCRP, Designs and Monitoring Programs) is intertwined. 13 13
HOW DO WE LINK ALL THE AREAS S - SUCCESS CCESS INDIC DICATORS ORS TO SUPPOR ORT T MONITORING ORING Success Indicators are the agreed upon standards that demonstrate whether actual closure performance is progressing over time (as expected at the design phase), in order to meet closure objectives. Success Indicators Post Closure Closure Activities Are the criteria achieved? Monitoring Are contingency or remedial actions required? Reclamation Completion Performance Assessment Report Report Final/Complete Staged Reclamation Reclamation Security Criteria Achieved Security Return Return 14 14
CLARI RIFI FICA CATION TION OF ACTI TIVITIE TIES S LINKED ED TO CLOSURE SURE CRITERIA TERIA • Table 5.2 has been updated to identify specific activities that will be undertaken to meet closure objectives and criteria as recommended. • Updated was submitted 3 July 2019 Closure re Origi ginal Closure re Criteri ria Revised Closure re Criteri ria Primary ry Reclamati tion on Activiti ties Post-Clos osure re Inspect ction ons and/or /or Objecti tive Monitor toring (revise sed criteri ria in blue font) t) (new activiti ties s in blue font) t) (new w details in blue font) t) NP2 – Physically 1. Physical Stability 1. Physical Stability Final landscape inspected and submission of as-built Area inspected and as-built drawing is stable PK conditions in a summary report completed by a deemed acceptable and signed-off by a Acceptable results, as identified in NP1, of Acceptable results, as identified in NP1, of containment area professional engineer. professional engineer. visual monitoring for deformation and visual monitoring for deformation and to limit risk of degradation for a minimum of three years degradation for a minimum of three years Post- Geotechnical inspections (visual) of the site Closure geotechnical monitoring. failure that would Post-Closure as part of site geotechnical Closure as part of site geotechnical inspections will occur Post-Closure in concert with the The WMP and North Pile sumps will be covered to stabilize affect safety of inspections completed and signed off by a completed and signed off by a professional site geotechnical inspection and monitoring accumulated sediments. people or wildlife. professional engineer. engineer. program. Re-grading the slope of the west perimeter embankment of 1. Chemical Stability 1. Chemical Stability Thermal monitoring will be completed using the Starter & East Cells. Not applicable as this is a physical stability Not applicable as this is a physical stability thermistors that will be installed in the North Infilling of the interior compartments of the Starter & East objective. Chemical stability is addressed objective. Chemical stability is addressed in Pile. Permafrost establishment is not Cells. in SW3. SW3. required to achieve stable slopes, but may Placement of a final cover layer of coarse material over the enhance it. 1. Future Use and Aesthetics 1. Future Use and Aesthetics entire North Pile for erosion protection purposes. Future use and aesthetics will be met Future use and aesthetics will be met through Construction of swales and spillways on the final surficial through physical criteria as described in physical criteria as described in NP2-1. Final cover of the North Pile to the perimeter ditches and influent NP2-1. Final grading will reflect grading will reflect surrounding topography. storage ponds. surrounding topography. Revie iewe wer Concern erns 15 15 • MVLWB 160: clarify closure criteria to be more specific about which activities will be carried out to meet closure objectives
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