Month YEAR Newmont Goldcorp – Confidential I Presentation Name 1
Con Mine Meg Keg Peg Lake System Study Design Workshop #1
December 10, 2019
Meg Lake, looking towards Keg Lake, 2017
Con Mine Meg Keg Peg Lake System Study Design Workshop #1 December - - PowerPoint PPT Presentation
Con Mine Meg Keg Peg Lake System Study Design Workshop #1 December 10, 2019 Newmont Goldcorp Confidential I Presentation Name 1 Month YEAR Meg Lake, looking towards Keg Lake, 2017 Workshop Agenda Welcome and Introductions MNML
Month YEAR Newmont Goldcorp – Confidential I Presentation Name 1
Meg Lake, looking towards Keg Lake, 2017
Keg Lake looking towards Con Mine, 2015
Peg Lake, looking towards YK Bay, 2017
Month YEAR Newmont Goldcorp – Confidential I Presentation Name 4
Meg Lake with approaching storm, 2019
Meg Lake Watershed
Keg Lake Watershed
Peg Lake Watershed
Peg Lake Outfall
(a) Measured during 2009 survey (Golder 2010) Local watershed boundaries, drainage areas, flow paths and flow connectivity within the MKP lake system were derived from publicly available elevation contour data using GIS tools (GNWT 2014). Due to the coarse resolution (2 m) of the elevation data, the assessment results have a correspondingly reduced accuracy.
2000 4000 6000 8000
Average Chloride Concentration (mg/L)
Site
2000-2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 (draft)
0.2 0.4 0.6 0.8
Average Total Arsenic Concentration (mg/L)
Site
2000-2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 (draft)
200 400 600 800 1000 1200 1400 1600 1800 2000
Chloride Concentration (mg/L)
Site
May-19 Jun-19 Jul-19 Aug-19 Sep-19
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Total Arsenic Concentration (mg/L)
May-19 Jun-19 Jul-19 Aug-19 Sep-19
Month YEAR Newmont Goldcorp – Confidential I Presentation Name 15
Month YEAR Newmont Goldcorp – Confidential I Presentation Name 17
Peg and Keg lakes looking towards Yellowknife, 2019
Month YEAR Newmont Goldcorp – Confidential I Presentation Name 22
Peg Lake Inlet, 2019
MKP Study Design Workshop #1 - Summary Notes
Page 1 of 3 10-December-2019
Date: Tuesday, December 10th, 2019 (8:30am to 4pm) Location: Chateau Nova, Yellowknife, NT Attendees: Dwight Grabke and Scott Stringer (Miramar Northern Mining Ltd.); Hilary Machtans and Alison Humphries (Golder Associates Ltd.); Tyree Mullaney, Heather Scott, and Katherine Harris (Mackenzie Land and Water Board); Rick Walbourne and Bryana Matthews (Government of Northwest Territories); Anne Wilson and Gabriel Bernard-Lacaille (Environment and Climate Change Canada); Adelaide Mufandaedza (North Slave Métis Alliance); and Sara Gillis (Yellowknives Dene First Nation). 1. Purpose of Workshops, Mandate of Working Group, Topics and Format of Workshop #1
Series of workshops schedule throughout the term of the licence to discuss and gather input on upcoming licence, monitoring, reporting requirements, or site remediation activities.
Current schedule is included in our Engagement Plan V2.0
Workshop #1 will be a combination of group discussion and smaller group work to engage parties and utilize our time effectively to aid in the development the MKP study objectives and a prioritized list of information needs. If there are opportunities for collaborative work on the study with other interested parties, MNML will be open to discussing those at the workshop as well.
Gather interested stakeholders for 1-2 workshops/year to discuss a variety of topics relative to the closure and post closure of the site.
MNML will chair workshops and document the discussions for consideration in the various
2. Discussion of Goals and Objectives of MKP Study (objectives updated based on discussion during December 10th Workshop) MKP Study Goals Goals through this workshop is to utilize proponent and stakeholder collaboration:
to establish a list of prioritized and sequenced objectives to be monitored over the 5 year MKP study period
to identify suitable monitoring analog as an indicator of system condition during continued monitoring beyond the study period into post closure MKP Study Objectives Objective 1: Assess conditions in MKP lakes system (better understand the ‘black box’) compile and review existing dataset and previous studies to evaluate the peak impacted baseline as a basis to measure improvement along the trend line into the future.
identify spatial variability in water and sediment quality (e.g., is there a lake, or on a coarse scale part of a lake, or a channel between lakes that is contributing more loading of a certain parameter)
MKP Study Design Workshop #1 - Summary Notes
Page 2 of 3 10-December-2019
provide baseline sediment quality and benthic invertebrate data to compare over time to help answer the question how conditions in the MKP lakes system are changing over time
identify the types, quantity and quality for loadings to the MKP system, including WTP, runoff, seepage, sediment
consider impacts of seasonal ice cover on seasonal water quality, contaminate cycling, exclusion, stratification, mixing, and flushing
build a conceptual model for the ‘black box’ of the MKP lakes system that includes individual lakes and different potential sources of loads (e.g., current treated effluent, sediment flux, seepage, runoff, snowmelt, upstream lake, etc.), for which quantification or assumptions of the loading rates will be required Objective 2: Assess how conditions in MKP lakes system are, or will be, influenced by future discharges from Con Mine assess how discharges of treated effluent impact water quality in the MKP lakes system in the short and long-term given the other current loadings to the system identify parameters of potential concern parameters of potential concern for water and sediment quality, identify temporal trends in water quality refine current model with consideration of more accurate watershed characteristics, precipitation, depths/surface areas/volumes of lakes, flows and loadings from the channels between and drainage areas of lakes
identify areas where there may be opportunities for changes in water management strategy (timing of discharge, frequency of discharge, etc.) to benefit the conditions within MKP Objective 3: Identify on-going post-closure monitoring of M-K-P beyond study period identify if closure objectives and/or criteria are appropriate for this system and the timing of their development, where does the underlying liability reside identify suitable analog as an indicator of system condition during continued monitoring beyond the study period into post closure 3. Identify and Prioritize Information Needs for Each Study Objective Group broke into smaller groups to identify information needs/gaps for
information need to a study outline (Figure 1). Figure 1 reflects the outcomes of the discussion
MNML is open to other interested parties gathering information collaboratively or in parallel during the study period to help inform the study but the Study Design requirements should be limited to those components that MNML is completing. 4. Next Steps Plan for 2020
develop study outline based on based on the information gathered today and further consultation as needed through Q1-Q2 2020
present proposed study outline to Working Group in advance of the Q2/Q3 in Workshop #2,
prepare study design for submission to the MVLWB based on feedback from Workshop #2
continue discussions in 2020 of study areas that could be done in collaboration with interested parties
MKP Study Design Workshop #1 - Summary Notes
Page 3 of 3 10-December-2019
Figure 1 : Overview of Meg, Keg, Peg Study Deliverables, Information Needs and Activities, 2019-2026
Notes: The figures reflects the outcomes of the discussion of the group during the workshop; MNML will consider this feedback when designing the study outline. On-going activities (e.g., monitoring and reporting) outside of the MKP Study are shown in blue boxes and activities related to the MKP Study are shown in red boxes. a) Annual summaries will be limited to a description of work completed on the study design, If MNML identifies the need for a significant change to the study design, MNML will submit a revised study design to the MVLWB. b) The MKP Study Report will include a plain language summary of study findings. AEMP = Aquatic Effects Monitoring Program; EEM = Environmental Effects Monitoring; JFB MZB = Jackfish Bay mixing zone boundary; MVLWB = Mackenzie Valley Land and Water Board; MDMER = Metal and Diamond Mining Effluent Regulations; MKP = Meg, Keg, Peg lakes; MNML = Miramar Northern Mining Ltd.