mount polley mine: short term water treatment/tsf design joint mem/moe presentation june 2, 2014
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Mount Polley Mine: Short Term Water Treatment/TSF DesignJoint MEM/MOE PresentationJune 2, 2014
Meeting Agenda
2
Welcome/Introductions
Mount Polley Mine UpdateOperations OverviewSite Conditions
Site Water ManagementOperating ConditionsCurrent Water StorageExisting Discharge AllowancesLong-Term StrategyShort-Term StrategyWater Treatment Update
TSF DesignBGC Presentation
Permitting UpdateWater Discharge PermitTailings Storage FacilityM-200 Mine PermitTailings/Waste Rock Research Project
Welcome/Introductions
3
Luke Moger – (MPMC) Project Engineer
Art Frye – (MPMC) Mine Operations Manager
Colleen Hughes – (MPMC) Environmental Co-ordinator
Todd Martin – (BGC) Senior Geotechnical Engineer
Daryl Dufault – (BGC) Senior Geotechnical Engineer
Pierre Stecko – (Minnow) Project Manager/Principal
Mount Polley Mine Update
4
Operations Overview
Site Conditions
Mount Polley Mine Update – Operations Overview
1995 Mill Site Construction 1996 Logging and Site Stripping 1997 – 2001 Phase One – Active Mining
(Cariboo Pit, Bell Pit)
2001 Closed Due to Low Metal Prices 2005 – 2013 Phase Two – Active Mining
(Wight Pit, Springer Pit, Southeast Zone Pit, Pond Zone Pit)
5
Mount Polley Mine Update – Operations Overview
6
Mount Polley Mine Update – Operations Overview
Operate 24/7, 365
415+ Employees
Mine, Mill and Ship Concentrate to Vancouver
~100,000tpd Mining Operation
~22,000tpd Milling Rate
Copper, Gold, Silver, Magnetite
7
Mount Polley Mine Update – Operations Overview
Active Mining Areas Springer/Cariboo Pit (Surface)
Wight Pit (Underground)
Active Dump Areas SERDS (NAG)
NW PAG Stockpile (PAG)
Last Permitted Mine Life 2016
Reserve/Resource Estimates 2025
8
Mount Polley Mine Update – Operations Overview
9
NW PAG STOCKPILE (PAG)
SERDS (NAG)
SPRINGER PIT
CARIBOO PIT
WIGHT PIT
Mount Polley Mine Update – Site Conditions
10
BOOTJACK LAKE
POLLEY LAKE
TAILINGS STORAGE FACILITY(TSF)
Mount Polley Mine Update – Site Conditions
11
NEW TAILINGS HAUL ROAD
EXPANDED NW PAG STOCKPILE
Site Water Management
12
Operating Conditions Current Water Storage Existing Discharge Allowances Long-Term Strategy Short-Term Strategy Water Treatment Update
Site Water Management - Operating Conditions
131999 2006 2013
Site Water Management - Operating Conditions
14
Operating Conditions Deficit – Neutral – Surplus
Tailings Storage Facility - Bathymetric Survey Data
*does not include water transferred to pits**average of two (2) readings taken in 2012
Survey Date TSF Pond Volume (m3)*
2007 2,296,868
2008 2,919,774
2009 1,514,286
2010 904,469
2011 3,586,040
2012 4,830,520**
2013 6,331,580
Site Water Management – Current Water Storage
15Existing Water Management Systems
Site Water Management – Current Water Storage
16
TAILINGS STORAGE FACILITY(TSF)
CARIBOO PIT
Cariboo Pit is no longer planned to store water after 2014
Site Water Management – Existing Discharge Allowances
Hazeltine Creek Discharge System
Permit amendment received November 7th, 2012 Dam filtered water Up to 1.4Mm3/year Up to 35% of flow in Hazeltine Creek (W7) Discharge window April - October
2013 Operation (September 23rd, 2013 – October 31st, 2013) 2m3/hour for 12-hour day shift (<25m3/day) Increased to 4m3/hour for 12-hour day shift (<50m3/day, MMER trigger)
2014 Operation (April 7th, 2014 – Present) Currently operating at maximum discharge based on main embankment toe-drain flow Limited to projected 170,500m3 (permitted 1.4Mm3) total discharge based on volume
constraints of “Dam Filtered Water” (and, to a lesser extent, water quality in low-flow due to 35% of Hazeltine Creek flow constraint)
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Site Water Management – Existing Discharge Allowances
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Hazeltine Creek
Main Embankment Tank
Perimeter Embankment Tank
Site Water Management – Existing Discharge Allowances
19
TAILINGS STORAGE FACILITY(TSF)
POLLEY LAKEHAZELTINE CREEK
W7
Water Surplus Summary (As of March, 2014) Water in Tailings Storage Facility = approx. 6,800,000m3
Water in Cariboo Pit = approx. 925,000m3
Projected Annual Surplus of Water = approx. 1,500,000m3
Water Discharge Summary Hazeltine Creek Discharge = approx. 1,400,000m3
Requires additional source(s) of water Passive Treatment
Anaerobic Biological Reactor
Site Water Management – Long-Term Strategy
20
Short-Term
Long-Term
Site Water Management – Long-Term Strategy
21
Existing Long Ditch
New West Ditch
Unknown Flow - 2014 Ditch Construction
Site Water Management – Long-Term Strategy
22
Goal Operate at neutral water condition
Drivers Returning water to local watersheds
Project Outline Phase I: Life-of-Mine
Continue research (i.e. passive treatment) Phase II: Post-Closure
Site Water Management – Long-Term Strategy
Annual Projected Surplus - 1,500,000m3
Permitted Discharge Allowance - 1,400,000m3
Existing Hazeltine Creek Discharge Volumes
∴Need to identify/permit additional water sources
23
Constraint Total Volume Discharge (m3)
Theoretical Discharge (35% of Hazeltine Creek Flow) 1,745,300
Theoretical Discharge (Dam Filtered Water Quality) 1,546,000
Theoretical Discharge (Dam Filtered Water Quantity) 195,610
2014 Projected Discharge (available Dam Filtered Water Quality and Quantity) 170,500
Site Water Management – Short-Term Strategy
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Goal Reduce existing water surplus on site
Drivers Geotechnical (TSF) *time sensitive Returning water to local watersheds
Project Outline 3-5 years Provide research for long-term water management strategy Provide research for TSF Design
Site Water Management – Short-Term Strategy (Water Treatment Update)
Design Parameters (ToR from MOE, March 26th, 2014)
Discharge Location – Polley Lake Discharge Quality
Chronic and Acute Criteria as Required by the BCWQG for Aquatic Life Lower levels for phosphorous and nitrate based on work by Minnow
Environmental 95% mixing of the effluent at 100m from discharge point Use of existing intake/discharge infrastructure at Polley Lake Discharge Period – 12 months/year, total annual discharge of
3,000,000m3
Project Start-up: 2014
25
Site Water Management – Short-Term Strategy (Water Treatment Update)
Required Items(ToR from MOE, March 26th, 2014)
Study on effluent mixing in Polley Lake Included in Technical Assessment Report by Minnow (draft under review by MPMC)
Monitoring plan for Polley Lake Included in Technical Assessment Report by Minnow (draft under review by MPMC)
Diffuser design to attain 95% mixing of the effluent at 100m from discharge point Design, along with report on mixing results for dilution zone completed by Knight Piésold
(draft under review by MPMC)
26
Site Water Management – Short-Term Strategy (Water Treatment Update)
27
TAILINGS STORAGE FACILITY(TSF)
POLLEY LAKE
PROPOSED DISCHARGE PIPE ALIGNMENT
EXISTING INTAKE STRUCTURE
PROPOSED TREATMENT FACILITY LOCATION
Proposed Water Treatment Schematic
Site Water Management – Short-Term Strategy (Water Treatment Update)
Work Completed to Date Modelling (Volume, Timing) Research (Technologies, Hydrology, Water Mixing) Planning (Locations, Infrastructure) Pilot Treatment Plant (Reverse Osmosis) Consultation (First Nations, Public, Public Liaison Committee) RFP and Vendor Selection (Newalta, R/O – September Startup) Technical Assessment Report (Minnow) Diffuser Design Work (KP)
Next Steps Permit Submission Plant Construction/Commissioning (including pipeline/diffuser installation)
28
TSF Design
29
BGC Presentation
Permitting Update
30
Water Discharge PermitTailings Storage FacilityM-200 Mine PermitTailings/Waste Rock Research Project
Permitting Forecast – Water Discharge Permit
31
Water Discharge Permit [ASAP - June]Last permit update: N/AMPMC to submit permit
Permitting Forecast – Water Discharge Permit
32
Key Activities to Date
October 24th, 2013: MPMC notified MOE of intent to apply for an amendment to Permit 11678
October 24th, 2013: MPMC started discussions through Implementation Committee meeting with First Nations around Water Management Strategies (also met November 28th, January 23rd, March 12th)
November 6th, 2013: Consultation with Public Liaison committee November 18th, 2013: Official conversation held with MOE to start
application process December 4th, 2013: Environmental Protection Notice posted and
published December 17th, 2013: Consultation with Public in Likely, BC March 26th, 2014: MOE confirms Terms of Reference for Discharge
Permitting Forecast – Water Discharge Permit (Hazeltine)
33
Water Discharge Permit - Hazeltine [Unknown]Last update: August 30th, 2013
Discharge selenium in sediment varianceCurrently limited to discharging “Dam Filtered
Water”1.4Mm3 annual discharge limit, current
projections are 170,500m3 for 2014
Permitting Forecast – Tailings Storage Facility
34
Tailings Storage Facility [late June/early July]Last permit update: August 9th, 2013
Construction to 970.0mCurrent ultimate dam at 970.0m elevation
Existing elevation ~967.0mMid-range design proposed to align with short-
term water management strategy Requires confirmation of proposed parameters
Updated ultimate dam design to follow
Permitting Forecast – M-200 Mine Permit
35
M-200 Mine Permit [July]Last permit update: July 25th, 2013
NW PAG Dump Expansion and Tailings Haul RoadUpdated Pit Designs (Springer/Cariboo)Updated Dump Designs (SERDS)Updated Reclamation and Closure Plan
Permitting Forecast – Tailings/Waste Rock Research Project
36
Tailings/Waste Rock Research Project [Draft Received]Last permit update: N/AConversation ongoing with MEMResearch (if successful) to be followed by full-scale
proposal
Open Discussion
37
Mount Polley Mine: Short Term Water Treatment/TSF DesignJoint MEM/MOE PresentationJune 2, 2014
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