Water Quality

Chemical, physical, microbiological water properties, water-licence criteria

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Aquatic Effects Monitoring Program (AEMP) 2015 Annual Report, Part 2, Data Report, Ekati Diamond Mine (Dominion Diamond, March 2016)
1 March 2016Report
This is the 2015 Aquatic Effects Monitoring Program Part 2 – Data Report for the Ekati Diamond Mine, prepared by ERM Consultants Canada Ltd. for Dominion Diamond Ekati Corporation. The report presents comprehensive field methodology and detailed monitoring data collected from October 2014 to September 2015 across meteorology, hydrology, physical limnology, water quality, phytoplankton, zooplankton, benthic invertebrates, and fish communities in lakes and streams across four watersheds surrounding the mine.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2015 Annual Report, Part 3, Statistical Report, Ekati Diamond Mine (Dominion Diamond, March 2016)
1 March 2016Report
This is the 2015 Aquatic Effects Monitoring Program Part 3 Statistical Report for the Ekati Diamond Mine, prepared by ERM Consultants Canada Ltd. for Dominion Diamond Ekati Corporation. The report presents comprehensive statistical analyses of water quality, plankton, benthos, and fish data collected from monitored and reference lakes in the Koala, King-Cujo, Pigeon-Fay, and Upper Exeter watersheds, using linear mixed effects regression, Tobit regression, and before-after control-impact (BACI) design methodologies to detect potential mine-related effects on aquatic ecosystems.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Jay Project Environmental Assessment (EA1314-01) Technical Reports, Multiple Parties (Diavik Diamond Mines, July to August 2015)
2015Letter
DDMI submits a technical report to the Mackenzie Valley Environmental Impact Review Board regarding the Jay Project environmental assessment, arguing that the proposed Jay Project would adversely affect DDMI's ability to operate and close the Diavik Mine by worsening water quality in Lac de Gras and reducing caribou use of the reclaimed mine site during the critical closure period (2023-2030).
Development Plans Water Quality Closure & Reclamation
Revised Site-Specific Water Quality Objectives for Potassium, Ekati Diamond Mine (Dominion Diamond, July 2015)
2015Report
Ekati Diamond Mine Revised Site-Specific Water Quality Objectives (SSWQO) for Potassium, Version 1.0, prepared by Dominion Diamond Ekati Corporation, July 31 2015, transmitted to Violet Camsell-Blondin, Chair, Wek'èezhii Land and Water Board, Yellowknife. Includes 21-day Chronic Freshwater Toxicity Test data using Daphnia magna (Sample ID Potassium WER-SITE, Work Order 1522, March 18 – April 2015) with daily reproduction counts and initial/final water quality measurements (pH, conductivity µS, potassium concentrations), and Appendix E.5 Selected Normal Species Sensitivity Distribution (SSD) Model Residual Normality Test results (Shapiro-Francia W', D'Agostino & Pearson's K²).
Water Quality Effluent Quality Criteria Aquatics Correspondence
Jay Project Technical Sessions, Mackenzie Valley Review Board (MVEIRB, April 2015)
20 April 2015Meeting Minutes
Technical sessions held April 20-24, 2015 for the Jay Project environmental assessment, featuring IEMA, Dominion Diamond, and regulatory participants discussing project alternatives, wildlife impacts, water quality modeling, fish habitat, air quality, and closure planning. The document includes detailed homework assignments, undertakings, and commitments from each day, followed by Information Request responses addressing environmental concerns related to mining alternatives, dike design, waste rock storage, water quality predictions, fish contaminants, and zooplankton dynamics.
Board Meetings Wildlife Water Quality
Status and Trends of Water Chemistry and Flow in the Coppermine and Lockhart River Basins, Final Report (Stantec, March 2015)
31 March 2015Report
This final report by Stantec evaluates the status and trends of water chemistry and flow in the Coppermine and Lockhart River watersheds in the Northwest Territories, analyzing 50+ years of monitoring data from Environment Canada and GNWT to assess spatial variability, seasonality, and temporal trends in response to mining development and other pressures.
Water Quality Monitoring Aquatic Effects Monitoring (AEMP)Regulatory
Aquatic Effects Monitoring Program (AEMP) Summary Report, Ekati Diamond Mine (Dominion Diamond, March 2015)
31 March 2015Report
The 2014 Aquatic Effects Monitoring Program (AEMP) annual report for the Ekati Diamond Mine documents comprehensive monitoring of aquatic ecosystems across multiple watersheds (Koala, King-Cujo, Pigeon-Fay, and Upper Exeter) to detect mine-related changes in water quality, physical limnology, sediment quality, and biological communities. The report includes updates to the Nitrogen Response Plan and a new Potassium Response Plan as required under Water Licence W2012L2-0001.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Part 1 — Evaluation of Effects, Ekati Diamond Mine (Dominion Diamond, March 2015)
20 March 2015Report
The 2014 Aquatic Effects Monitoring Program (AEMP) evaluation assesses environmental effects of the Ekati Diamond Mine on lake and stream water quality, sediment composition, and aquatic biology across multiple watersheds including Koala, King-Cujo, and Pigeon-Fay, using statistical analysis and comparison to historical baseline data from 1994–2014.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Part 2 — Data Report, Ekati Diamond Mine (Dominion Diamond, March 2015)
20 March 2015Dataset
This is the 2014 Aquatic Effects Monitoring Program Part 2 - Data Report for the Ekati Diamond Mine, documenting comprehensive field sampling and laboratory analyses of the aquatic environment from October 2013 to September 2014. The report presents detailed methodology and results for monitoring meteorology, hydrology, physical limnology, water quality, phytoplankton, zooplankton, benthic invertebrates, and sediment quality across multiple lakes and streams in four watersheds surrounding the mine.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Response Plan for Potassium, Version 1.0, Ekati Diamond Mine (Dominion Diamond, March 2015)
2015Report
Ekati Diamond Mine Aquatic Response Plan for Potassium, Version 1.0, prepared by Dominion Diamond Ekati Corporation, March 31 2015, submitted to Violet Camsell-Blondin, Chair, Wek'èezhli Land and Water Board (WLWB), Yellowknife. Documents Total Potassium concentrations at AEMP Lake Sites 1994-2014 (Reference: ERM, Nanuq, Vulture), Action Level status for King-Cujo and Pigeon-Fay / Upper Exeter watersheds (action level not reached), potassium source attribution to Process Plant kimberlite processing (particularly underground kimberlite per Rescan 2012c), and references to ERM-Rescan Long Lake Containment Facility water quality work.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Northwest Territories 2015 Environmental Audit (Audit Steering Committee, 2015)
~2015Report
Approximate date — inferred from filename
The Northwest Territories 2015 Environmental Audit examines the effectiveness of the regulatory system under the Mackenzie Valley Resource Management Act and monitoring methods for cumulative environmental impacts, with SENES Consultants conducting the independent audit and an Audit Steering Committee overseeing the process. The audit will review regulatory effectiveness, identify information gaps related to caribou, water, and fish, and provide recommendations to improve environmental management in the NWT.
Regulatory Monitoring Water Quality Traditional Knowledge Aquatics
Project Description, Jay Project Developer's Assessment Report, Section 3 (Dominion Diamond, October 2014)
1 October 2014Report
This is Section 3 (Project Description) of Dominion Diamond's Developer's Assessment Report for the proposed Jay Project, submitted to the Mackenzie Valley Review Board in October 2014. It provides comprehensive technical details of the planned extension of the Ekati Diamond Mine through development of the Jay kimberlite pipe beneath Lac du Sauvage, including construction, operations, closure phases, geological and geotechnical characterization, and use of existing mine infrastructure.
Development Plans Closure & Reclamation Waste Rock Exploration
Environmental Agreement and Water Licence Annual Report 2013 (Dominion Diamond, April 2014)
24 April 2014Presentation
This 2013 Environmental Agreement and Water Licence Annual Report documents Dominion Diamond Ekati Corporation's compliance with regulatory requirements for the Ekati Diamond Mine, including water management, waste disposal, mining operations, environmental monitoring, and reclamation activities throughout the reporting year.
Regulatory Water Licence Environmental Agreement
WLWB Public Hearing — Lynx Project Water Licence & Land Use Permit, Ekati Diamond Mine (Multiple parties, February 2014)
6 February 2014Report
Public hearing proceedings (February 6-7, 2014) for Dominion Diamond Ekati Corporation's proposed Lynx Project water licence renewal and land use permit applications before the Wek'eezhii Land and Water Board, including presentations and interventions from IEMA, AANDC, Lutsel K'e Dene First Nation, Yellowknives Dene First Nation, and the proponent addressing water management, wildlife protection, closure planning, and regulatory compliance.
Regulatory Water Licence Water Quality
Modelling Predictions of Water Quality for Pit Lakes, Ekati Diamond Mine (BHP Billiton, November 2013)
2013Report
Ekati Diamond Mine Modelling Predictions of Water Quality for Pit Lakes (Panda, Beartooth, Koala, Koala North), prepared by Rescan Engineers & Scientists / Rescan Environmental Services Ltd. for Dominion Diamond Ekati Corporation, November 18 2013, submitted to Violet Camsell-Blondin (Chair, Wek'èezhii Land and Water Board, Yellowknife). Includes maximum ice-thickness range from nearby Contwoyto Lake (1.2-2.2 m) for natural-variability bounding, ΔSt salinity-stability parameter (30 J/m² and 10 J/m² scenarios) plots for Koala, Koala North, Beartooth, Panda pit-lake salinity vs depth, Comparison of Predicted Pit Wall Runoff and Groundwater with Observed Pit Sump Quality, and predicted Dissolved Aluminum, Arsenic, Chromium concentration projections 2006-2009.
Closure & Reclamation Water Quality Monitoring Regulatory
Environmental Impact Report, Close out Report, Ekati Diamond Mine (Dominion Diamond, August 2013)
~2013Report
Approximate date — inferred from filename
This close-out report documents the completion of the 2012 Environmental Impact Assessment (EIR) process for the Ekati Diamond Mine, including technical sessions, public workshops held November 6-7, 2012, and stakeholder/regulator comments received in January 2013. The report consolidates comments and responses from regulatory and community stakeholders on environmental risks including air quality, water quality, land management, and wildlife impacts, with particular focus on caribou movement, waste rock freezing, dioxin/furan contamination, and adaptive management strategies.
Development Plans Monitoring Air Quality
Aquatic Effects Monitoring Program (AEMP) Plan for 2013–2015, Ekati Diamond Mine (Dominion Diamond, April 2013)
2013Report
Aquatic Effects Monitoring Program (AEMP) Plan for 2013 to 2015 for the Ekati Diamond Mine, prepared by Rescan Environmental Services Ltd. for Dominion Diamond Ekati Corporation, April 29 2013. Submitted to Violet Camsell-Blondin, Chair, Wek'èezhìı Land and Water Board (WLWB), Yellowknife. Covers benchmark comparisons (Site-Specific Water Quality Objectives, CCME, Health Canada, British Columbia Ministry of Environment), biological archiving program (phytoplankton, zooplankton, benthic invertebrates, fish ageing samples, voucher collection), Kruskal-Wallis and two-way ANOVA evaluations of individual lakes, and the WLWB Decision for the 2012 AEMP Report.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Environmental Agreement and Water Licence Annual Report 2012, Ekati Diamond Mine (Dominion Diamond, April 2013)
1 April 2013Report
This is the 2012 Environmental Agreement and Water Licence Annual Report for the Ekati Diamond Mine, submitted by Dominion Diamond Ekati Corporation in April 2013, detailing compliance with Type A Water Licence W2009L2-0001 and the Environmental Agreement requirements. The report provides comprehensive monitoring data on water use, waste management, kimberlite processing, wildlife and aquatic effects monitoring, closure planning, spill management, and all operational activities throughout 2012.
Monitoring Regulatory Water Quality
Aquatic Effects Monitoring Program (AEMP) Summary Report, Ekati Diamond Mine (BHP Billiton, March 2013)
28 March 2013Report
BHP Billiton's 2012 Aquatic Effects Monitoring Program report presents annual results from monitoring aquatic ecosystems at the Ekati Diamond Mine in the Northwest Territories, submitted under Water Licence W2009L2-0001. The report concludes that changes observed in water quality, plankton, and benthos communities do not appear to have influenced fish populations or health in monitored lakes, though laboratory contamination issues affected some fish tissue metal analyses.
Aquatic Effects Monitoring (AEMP)Water Quality Monitoring
Aquatic Effects Monitoring Program (AEMP) Part 1 — Evaluation of Effects, Ekati Diamond Mine (BHP Billiton, March 2013)
1 March 2013Report
This is a comprehensive 2012 aquatic effects monitoring report for the Ekati Diamond Mine covering the Koala and King-Cujo watersheds, evaluating physical limnology, water quality, plankton, benthos, and fish populations across multiple lakes and streams using statistical and graphical analyses to assess mining-related impacts.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality

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