Aquatic Effects Monitoring (AEMP)

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Aquatic Effects Monitoring Program (AEMP) 2017 Annual Report, Review Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, September 2018)
11 September 2018Letter
The Independent Environmental Monitoring Agency submits its review of Dominion Diamond Ekati ULC's 2017 Aquatic Effects Monitoring Plan Annual Report to the Wek'eezhii Land and Water Board, noting it is a high-quality report covering aquatic environmental impacts downstream of the Ekati mine, with comments on the Aquatic Response Framework to be submitted separately.
Aquatic Effects Monitoring (AEMP)Aquatics Correspondence
Aquatic Effects Monitoring Program (AEMP) Response Framework, Version 3.0, Ekati Diamond Mine (Dominion Diamond, June 2018)
29 June 2018Report
Dominion Diamond submits the updated Aquatic Response Framework Version 3.0 for the Ekati Diamond Mine to the Wek'èezhìi Land and Water Board, proposing a fluoride benchmark of 1.5 mg/L and responding to regulatory comments on action levels, significance thresholds, and fish tissue residue assessment.
Water Quality Aquatic Effects Monitoring (AEMP)Aquatics
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Version 1.2, Ekati Diamond Mine (Dominion Diamond, June 2018)
25 June 2018Report
Dominion Diamond Ekati ULC submits Version 1.2 of the Response Plan for Fish to the Wek'èezhìi Land and Water Board, addressing low action level exceedances for antimony, molybdenum, selenium, uranium, and EROD activity in fish tissue detected in the 2012 Aquatic Effects Monitoring Program. The plan proposes low, medium, and high action levels with rationale for response actions to manage mine-related changes in fish tissue contaminants while maintaining protection of the aquatic receiving environment.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) 2016 Annual Report, Review and Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, July 2017)
7 July 2017Letter
The Independent Environmental Monitoring Agency reviews Dominion Diamond Ekati Corporation's 2016 Aquatic Effects Monitoring Plan Annual Report and provides comments on water quality exceedances in Koala and King-Cujo watersheds, recommendations for improved data visualization, and recommendations for harmonizing monitoring methodologies with Diavik to address cumulative impacts on Lac de Gras.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Selenium Response Plan, Version 1.1, Ekati Diamond Mine (Dominion Diamond, June 2017)
16 June 2017Report
This Aquatic Response Plan for Selenium Version 1.1 documents Dominion Diamond Ekati Corporation's response to elevated selenium concentrations detected in Cujo Lake during winter 2016, which triggered a low action level under the Aquatic Response Framework. The plan proposes revised action levels based on the US EPA's 2016 lentic water quality criterion (0.0015 mg/L) and describes ongoing selenium control measures, with findings indicating the elevation was temporary and unlikely to cause adverse ecological or human health effects.
Aquatics Water Quality Aquatic Effects Monitoring (AEMP)
Aquatic Effects Monitoring Program (AEMP) Part 1, Evaluation of Effects, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
The 2016 Aquatic Effects Monitoring Program (AEMP) annual report for the Ekati Diamond Mine evaluates aquatic effects across multiple watersheds through comprehensive monitoring of physical limnology, water quality, and aquatic biology. The report compares 2016 monitoring results to predicted water quality benchmarks and historical baseline data to assess mine-related impacts on lakes and streams.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Summary Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This is the 2016 Aquatic Effects Monitoring Program (AEMP) Summary Report for the Ekati Diamond Mine, submitted by Dominion Diamond Ekati Corporation to the Wek'èezhìi Land and Water Board under Water Licence W2012L2-0001. The report documents comprehensive monitoring of aquatic ecosystems across multiple watersheds (Koala, King-Cujo, Pigeon-Fay, Upper Exeter, and Carrie Pond) to detect changes potentially caused by mine activities, evaluating physical limnology, water quality, and biological parameters including phytoplankton, zooplankton, and benthos communities.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Part 2, Data Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This is the 2016 Aquatic Effects Monitoring Program Part 2 – Data Report for the Ekati Diamond Mine, submitted to the Wek'èezhìi Land and Water Board in March 2017. The report presents comprehensive field methodology and detailed monitoring data for aquatic environmental components including hydrology, physical limnology, water quality, phytoplankton, zooplankton, and benthic invertebrates collected from October 2015 to September 2016 across multiple lakes and streams in four watersheds surrounding the mine.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2016 Annual Report, Part 3 - Statistical Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This is Part 3 of the 2016 Aquatic Effects Monitoring Program (AEMP) annual report for Ekati Diamond Mine, submitted to the Wek'èezhìi Land and Water Board under Water Licence W2012L2-0001. The document presents detailed statistical analyses of water quality, plankton, and benthic data collected from monitored and reference lakes in multiple watersheds, using linear mixed effects regression and before-after-control-impact (BACI) design methodologies to evaluate potential mine-related effects on aquatic ecosystems.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Selenium Response Plan, Version 1.0, Ekati Diamond Mine (Dominion Diamond, August 2016)
31 August 2016Report
Dominion Diamond Ekati Corporation's Aquatic Response Plan for Selenium addresses the exceedance of low action levels for selenium in Cujo Lake detected during 2016 under-ice monitoring, caused by discharge of selenium-elevated water from the King Pond Settling Facility resulting from pumping of Misery Pit and Desperation Pond water in 2015. The plan proposes continued AEMP monitoring and a literature review on selenium toxicology to establish medium and high action levels, with an interim medium action level of 0.0015 mg/L based on US EPA criteria for lentic environments.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, June 2016)
17 June 2016Letter
The Independent Environmental Monitoring Agency provides comments on Dominion Diamond Ekati Corporation's Fish Response Plan, supporting proposed studies while raising concerns about the exclusion of Leslie Lake data, the use of otoliths without historical baseline data, and recommending the inclusion of parasitism metrics alongside growth in determining medium action levels.
Aquatics Aquatic Effects Monitoring (AEMP)Correspondence
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Version 1.0, Ekati Diamond Mine (Dominion Diamond, April 2016)
30 April 2016Report
This Aquatic Response Plan for Fish addresses low action level exceedances detected in 2012 for tissue metals (antimony, molybdenum, selenium, uranium) and EROD activity in lake trout and round whitefish at the Ekati Diamond Mine, submitted to the Wek'èezhìi Land and Water Board in compliance with Water Licence W2012L2-0001. The report describes the likely causes of exceedances (elevated metal concentrations in water and sediments downstream of the Long Lake Containment Facility and King Pond Settling Facility), ecological implications, and proposes response actions including toxicology literature review and fish growth studies to establish medium and high action levels.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) 2015 Annual Report, Summary Report, Ekati Diamond Mine (Dominion Diamond, March 2016)
31 March 2016Report
The 2015 Aquatic Effects Monitoring Program (AEMP) Summary Report documents the comprehensive annual monitoring of aquatic ecosystems at the Ekati Diamond Mine across four watersheds (Koala, King-Cujo, Carrie Pond, and Pigeon-Fay/Upper Exeter), assessing water quality, physical limnology, and biological communities to detect mine-related environmental changes. The report includes evaluation of effects, action level exceedances under the Aquatic Response Framework, and response plans for nitrogen and potassium exceedances.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2015 Annual Report, Part 1, Evaluation of Effects, Ekati Diamond Mine (Dominion Diamond, March 2016)
1 March 2016Report
The 2015 Aquatic Effects Monitoring Program (AEMP) Part 1 report evaluates aquatic environmental effects from the Ekati Diamond Mine across four watersheds (Koala, King-Cujo, Pigeon-Fay, and Upper Exeter) and reference lakes, analyzing water quality, physical limnology, plankton, benthos, and fish populations from 1994–2015 baseline and operational data.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
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
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
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

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