Misery Underground Project Water Licence and Land Use Permit Technical Session November 28, 2017 Project Introduction and Schedule
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE Misery Underground Project (MUG) Location • Add text • Ekati mine is located 300 km northeast of Yellowknife • Misery Pit located in southeastern portion of the Ekati mine property about 30 km from the main facilities in Lac de Gras watershed MISERY PIT MUG Technical Session 1
SECTION TITLE PROJECT INTRODUCTION AND SCHEDULE MUG Project Overview • Project includes approximately 3.5 years of underground mining from 2018 to 2022 • Smaller project 1.8 M tonnes of ore (~4% of Jay mining) • Uses existing Misery site and Ekati mine processing plant, road and power • Use of King Pond and Lynx Pit for water management MUG Technical Session 2
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE MUG Project Overview • No new areas will be disturbed (i.e., all disturbances within existing footprint) • Traffic levels similar to existing Misery open pit and lower rates than Jay Project • Development proposed to begin as soon as permitting is in place MUG Technical Session 3
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE Economics • Critical economic “bridge” for Ekati mine • steady supply of ore between end of Misery open pit and Sable Pit operations and start of production from Jay Project • One year extension of Ekati mine life (2033 to 2034) • Retains existing skilled workforce for support operations • Incremental job opportunities from labour-intensive underground mining MUG Technical Session 4
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE Underground Mine Design MUG Technical Session 5
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE MUG Project Components New infrastructure required at Misery site: • 80 person addition to Misery camp • portals for underground access (2 in-pit locations and possibly a surface portal) • expansion to surface structures • additional dewatering lines • development and construction of underground mine fresh air raise (FAR) and supply of compressed air • connection of Misery Powerline to underground • mine dry and office facility MUG Technical Session 6
SECTION TITLE PROJECT INTRODUCTION AND SCHEDULE MUG Project Components Additional Requirements: • Minor modifications to Saddle Dam at King Pond Settling Facility • Modification under the current WL (W2012L2-001) Part G, Condition 1 • Temporary ore stockpile to be located within footprint of Misery Pit area MUG Technical Session 7
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE MUG Project Schedule 2018 2019 2020 2021 2022 2022-2028 2028-2035 Expected MUG Environmental Approvals and Permits ✓ End of Misery open pit mining and beginning of MUG ✓ construction MUG Operations ✓ ✓ ✓ ✓ Start of MUG Closure activities ✓ Jay Project Dike Construction ✓ ✓ ✓ Jay Dike Dewatering ✓ Jay Dewatering/Operations (no Discharge to LdS) ✓ Jay Dewatering/Operations (Discharge to LdS) ✓ MUG Technical Session 8
SECTION TITLE PROJECT INTRODUCTION AND SCHEDULE Water Licence and Land Use Permit Application • Issuance of Land Use Permit W2017D0004 • Requesting that the MUG Project be amalgamated in current Ekati mine Water Licence W2012L2-0001 • As part of Water Licence issuance requesting approval of: o Concepts contained within the Closure and Reclamation section of the Project Description (Appendix A - Section 4.9) o RECLAIM Estimate (updated version submitted with Response to Review Comment GNWT-12) o Waste Rock and Ore Management Plan (Revised WROMP for MUG submitted with Response to Review Comment ECCC-08) o Wastewater and Processed Kimberlite Management Plan (Appendix H) o Misery Underground Project Minewater Management Plan (Appendix E) MUG Technical Session 9
SECTION TITLE PROJECT INTRODUCTION AND SCHEDULE MUG Project – WLWB Work Plan Task Date Technical Session November 28, 2017 Responses to Information Requests December 15, 2017 Pre-Hearing Conference December 19, 2017 Interventions January 16, 2018 Proponent Responses to Interveners January 30, 2018 Public Hearing February 7, 2018 Undertakings Due February 22, 2018 Draft Water Licence Distributed March 8, 2018 Closing Arguments from Interveners April 12, 2018 Closing Arguments from Proponent April 19, 2018 Board Meeting Late May/June 2018 Draft WL and RFD Sent to Minister June/July 2018 Anticipated Date of WL from Minister August/September 2018 MUG Technical Session 10
PROJECT INTRODUCTION AND SCHEDULE SECTION TITLE Thank you MUG Technical Session 11
Misery Underground Project Water Licence and Land Use Permit Technical Session November 28, 2017 King Pond Settling Facility Modification
SECTION TITLE KING POND SETTLING FACILITY MODIFICATION King Pond Settling Facility Water management plan includes use of King Pond Settling Facility for temporary storage of minewater from underground mining of Misery Pit MUG Technical Session 1
SECTION TITLE KING POND SETTLING FACILITY MODIFICATION King Pond Settling Facility - Upgrade Design • Requires upgrades to existing pervious Saddle Dam and to north and west perimeters of Misery camp rockfill pad; no changes to the King Pond Dam. Modification under existing Water Licence Part G, Condition 1 (WLWB-3). • Seepage barriers to upstream slope surfaces such that water storage at maximum operating level (447.1 masl) results in minimum seepage • Dams are not being raised (IEMA-14) and addition of seepage barriers will not change stability conditions of existing structures • Construction planned to begin Summer 2018 (WLWB-4, 7) MUG Technical Session 2
SECTION TITLE KING POND SETTLING FACILITY MODIFICATION King Pond Settling Facility – Upgrade Design For Saddle Dam and Misery camp rockfill pad north and west perimeters, current design includes use of pre-fabricated geosynthetic clay liner (GCL) rather than fill material from Ekati mine site (WLWB-6) MUG Technical Session 3
SECTION TITLE KING POND SETTLING FACILITY MODIFICATION King Pond Settling Facility - Upgrade Design • Freeboard for King Pond Settling Facility remains at minimum of 1 m as per current Water Licence; no changes to the existing King Pond Dam or permitted maximum water level • Dam Class is Significant (WLWB-5) • Continue to be inspected annually and reported as part of the Ekati mine’s Annual Geotechnical Inspections (WLWB-5) • Will implement Best Applicable Practices in construction of works (outlined in Construction Plan) (WLWB-4) • Continue working with DFO related to the existing approved Fisheries Authorization for King Pond Settling Facility (DFO-2) MUG Technical Session 4
SECTION TITLE KING POND SETTLING FACILITY MODIFICATION Thank you. Do you have any questions? MUG Technical Session 5
SECTION TITLE Misery Underground Project Water Licence and Land Use Permit Technical Session November 28, 2017 Site Water Management
SECTION TITLE SITE WATER MANAGEMENT Site Water Management Objectives: • Enable safe and timely underground mining of the Misery Main kimberlite pipe • Minimize quantity of minewater for management and monitoring • Plan for safe discharge of water to the receiving environment such that adverse effects are not anticipated or likely • Utilize existing facilities for management of minewater MUG Technical Session 1
SECTION TITLE SITE WATER MANAGEMENT Water Management Concept • Before pumping Misery Underground minewater – King Pond Settling Facility will be pumped down to elevation 443 m (WLWB-11) Wall Rock Runoff Evaporation Catchment Runoff (Pad Pumped Flow Runoff, Natural Runoff, WRSA Runoff) Natural Flow Direct Precipitation Discharge Evaporation Misery Pit Active Lynx Pit King Pond Discharge to Environment (Cujo Lake) GW MUG Technical Session 2
SECTION TITLE SITE WATER MANAGEMENT King Pond Settling Facility – pumped down to elevation 443 m, August 2017 MUG Technical Session 3
SECTION TITLE SITE WATER MANAGEMENT Water Management Concept • Once MUG minewater pumping begins – King Pond Settling Facility will temporarily store pit minewater while Lynx Pit operations ongoing Wall Rock Runoff Evaporation Catchment Runoff (Pad Runoff, Natural Runoff, WRSA Runoff) Direct Precipitation Evaporation Misery Pit Discharge to Lynx Pit King Pond Environment (if WQ meets EQC) GW U G MUG Technical Session 4
SECTION TITLE SITE WATER MANAGEMENT Water Management Concept • Once Lynx Pit operation completed (2019) – MUG minewater will be stored in Lynx Pit • King Pond Settling Facility pumped down to current operational levels by pumping to Lynx Pit Wall Rock Evaporation Runoff Catchment Runoff (Pad Pumped Flow Runoff, Natural Runoff, WRSA Runoff) Natural Flow Plant Site Direct Runoff Discharge Precipitation Evaporation Misery Discharge to Pit Lynx Pit King Pond Environment (if WQ meets EQC) GW U G MUG Technical Session 5
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