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Barren-ground Caribou Telemetry Analyses, Study Area and Land Cover Classification, Ekati Diamond Mine (Arctic Canadian Diamond Company, November 2022)
1 November 2022Report
This report documents decisions on study area expansion and landcover data selection for barren-ground caribou movement analyses at Ekati Diamond Mine. The analysis compares multiple landcover datasets (LC2009, EOSD, LC2000) and concludes that merging LC2000 (ETM+) and LC2009 classifications provides continuous coverage capturing 93% of Bathurst herd telemetry locations.
Wildlife Caribou Monitoring Development Plans
Waste Rock Geochemical Characterization and Kinetic Testing Report, Part 2, Ekati Diamond Mine (Arctic Canadian Diamond Company, August 2022)
1 August 2022Report
This report documents humidity cell test results and geochemical assessment of metasediment from the Point Lake Project at Ekati Diamond Mine, addressing water licence requirements for kinetic testing and investigation of NAG pH discrepancies. The study evaluates acid generation potential, metal leaching, and parameters of concern in Point Lake metasediment to inform waste rock storage area seepage predictions.
Waste Rock Acid Rock Drainage Geochemistry Regulatory
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan Version 3.0, Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, July 2022)
20 July 2022Letter
The Independent Environmental Monitoring Agency provides comments on Arctic Canadian Diamond Company's Response Plan for Fish Version 3.0, addressing concerns about mercury and selenium persistence in fish-bearing lakes, the exceedance of mercury action levels in Kodiak Lake, and the need to incorporate information about which fish organs are consumed by Indigenous communities into contaminant benchmarks.
Correspondence Aquatics Fish Habitat
Comments on Environmental Agreement and Water Licence Annual Report, Ekati Diamond Mine (Independent Environmental Monitoring Agency, July 2022)
4 July 2022Letter
The Independent Environmental Monitoring Agency reviews Arctic Diamond's 2021 Environmental Agreement and Water Licence Annual Report, finding it satisfactory overall but recommending improvements to air quality monitoring data completeness, consistency in ambient standards references, and a comprehensive re-evaluation of the Air Quality Monitoring Program before implementing proposed reductions to monitoring stations.
Air Quality Correspondence Regulatory Water Quality Environmental Agreement
Environmental Agreement and Water Licence Annual Report 2021, Plain Language Summary, Ekati Diamond Mine (Arctic Canadian Diamond Company, May 2022)
19 May 2022Report
Arctic Canadian Diamond Company's 2021 Environmental Agreement and Water Licence Annual Report Plain Language Summary documents the Ekati Diamond Mine's environmental management and compliance with regulatory requirements. The report covers mining operations, water quality monitoring across multiple watersheds, air quality and greenhouse gas emissions, wildlife monitoring, waste management, and reclamation activities for the reporting year.
Monitoring Water Quality Regulatory
Air Quality Monitoring Program (AQMP) Annual Report 2021, Appendices F-I, Ekati Diamond Mine (Arctic Canadian Diamond Company, April 2022)
1 April 2022Report
The 2021 Air Quality Monitoring Program (AQMP) report for the Ekati Diamond Mine presents meteorological and air quality monitoring data collected from 2018 to 2021, assessing compliance with ambient air quality standards and the effectiveness of dust mitigation strategies. Key findings include no exceedances of total suspended particulate standards, greenhouse gas emissions of 150.8 ktCO2e in 2021, and recommendations to streamline monitoring station networks while maintaining adequate coverage of mining activity impacts.
Air Quality Monitoring Particulate Matter
Air Quality Monitoring Program (AQMP), Appendix F to the 2021 Environmental Agreement and Water Licence Annual Report, Ekati Diamond Mine (Arctic Canadian Diamond Company, April 2022)
1 April 2022Report
The 2021 Air Quality Monitoring Program (AQMP) report for the Ekati Diamond Mine presents meteorological and air quality monitoring data collected from 2018 to 2021, assessing compliance with ambient air quality standards and the effectiveness of dust mitigation measures. Key findings include no exceedances of total suspended particulate standards, greenhouse gas emissions of 150.8 ktCO2e in 2021, and elevated metal and particulate concentrations in snow and lichen tissue near mining infrastructure that decrease with distance from the mine site.
Air Quality Particulate Matter Monitoring
Wildlife Effects Monitoring Program (WEMP) Annual Report 2021, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2022)
31 March 2022Report
Arctic Canadian Diamond Company Ltd. submitted the 2021 Wildlife Effects Monitoring Program Annual Report for the Ekati Diamond Mine, documenting wildlife monitoring activities, effects from mining development, and effectiveness of mitigation efforts across multiple species including caribou, grizzly bears, wolves, wolverines, foxes, raptors, and migratory birds throughout a 2,800 km² study area.
Wildlife Monitoring Caribou
Aquatic Effects Monitoring Program (AEMP) Part 1 Annual Report, Appendix A, 2021 Data Report, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2022)
1 March 2022Report
This is the 2021 Aquatic Effects Monitoring Program (AEMP) Part 1 Annual Report, Appendix A: 2021 Data Report for the Ekati Diamond Mine. It provides comprehensive tabular summaries and data from monitoring conducted October 2020 to September 2021 across multiple lakes, streams, and watersheds, including hydrology, water quality, sediment quality, plankton, benthos, and small-bodied fish monitoring, with associated quality assurance/quality control results and meteorological data.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2021 Annual Report, Part 1, Appendices B to G, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2022)
1 March 2022Report
This is Appendix B of the 2021 Aquatic Effects Monitoring Program Part 1 Annual Report for Ekati Diamond Mine, presenting historical lake water quality data from 1994 to 2021 across 47 water quality variables measured in reference lakes and monitored watersheds, with graphical trends and analytical detection limits.
Aquatics Water Quality Aquatic Effects Monitoring (AEMP)
Aquatic Effects Monitoring Program (AEMP) Part 2 Statistical Report, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2022)
1 March 2022Report
This is the 2021 Aquatic Effects Monitoring Program (AEMP) Part 2 Statistical Report for the Ekati Diamond Mine, presenting statistical analysis methods and results for water quality, sediment quality, phytoplankton, zooplankton, benthos, and fish populations across three watersheds (Koala, King-Cujo, and Horseshoe) and associated lakes. The report details regression modelling approaches, hypothesis testing procedures, and comprehensive results comparing monitored sites to reference sites to detect potential mine-related environmental effects.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Annual Report 2021, Part 1, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2022)
1 March 2022Report
The 2021 Aquatic Effects Monitoring Program (AEMP) Annual Report for the Ekati Diamond Mine documents the results of comprehensive aquatic ecosystem monitoring across three watersheds (Koala, King-Cujo, and Horseshoe) and associated downstream lakes. The report evaluates mine-related effects on physical limnology, water quality, sediment quality, and aquatic biology, identifying multiple mine-related changes in water chemistry and plankton communities downstream of discharge facilities, with several Action Level exceedances requiring response plans.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality Benthic Invertebrates
Surveillance Network Program (SNP) Summary and Waste Rock Seepage Survey Report, Appendices A-B, Ekati Diamond Mine (Arctic Canadian Diamond Company, December 2021)
31 December 2021Report
This 2021 Surveillance Network Program (SNP) summary and Waste Rock Seepage Survey report documents water quality monitoring and effluent compliance at the Ekati Diamond Mine under Water Licence W2020L2-0004, including monthly sampling results from multiple surveillance stations, seepage quality assessments across waste rock storage areas, and identification of twelve seeps of potential concern requiring adaptive management.
SNP Water Quality Effluent Quality Criteria Regulatory
Aquatic Effects Monitoring Program (AEMP) Annual Report 2021, Appendices C-E, Ekati Diamond Mine (Arctic Canadian Diamond Company, December 2021)
23 December 2021Report
The 2021 Aquatic Effects Monitoring Program (AEMP) Annual Report for Ekati Diamond Mine documents monitoring results across three watersheds (Koala, King-Cujo, and Horseshoe) and associated downstream lakes, evaluating physical limnology, water quality, sediment quality, and aquatic biology. The report also includes a 2021 Closure and Reclamation Progress Report detailing reclamation research, engagement activities, and progressive reclamation activities at the mine site.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality Closure & Reclamation
Waste Rock and Ore Storage Management Plan (WROMP), Version 11.0, Ekati Diamond Mine (Arctic Canadian Diamond Company, June 2021)
29 June 2021Report
Arctic Canadian Diamond Company submitted Waste Rock and Ore Storage Management Plan (WROMP) Version 11.0 to the Wek'èezhìi Land and Water Board addressing regulatory directives and incorporating a new Seepage Response Framework to manage waste rock seepage quality at the Ekati Diamond Mine. The plan details geochemical characterization, storage area designs, monitoring protocols, and adaptive management procedures for multiple kimberlite pipes and waste rock storage areas across the mine site.
Waste Rock Acid Rock Drainage Geochemistry
Aquatic Effects Monitoring Program (AEMP) 2020 Annual Report, Review Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, June 2021)
4 June 2021Letter
The Independent Environmental Monitoring Agency reviews Arctic Diamond's 2020 Ekati Aquatic Effects Monitoring Plan Annual Report, noting reduced field activities due to COVID-19 and providing specific comments on mercury in fish tissues, under-ice oxygen depletion in Cujo Lake, and elevated potassium concentrations in Leslie Lake, with two recommendations for further investigation and mitigation.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Wildlife Effects Monitoring Program (WEMP) Annual Report 2020, Ekati Diamond Mine (Arctic Canadian Diamond Company, April 2021)
30 April 2021Report
This is the 2020 Wildlife Effects Monitoring Program Annual Report for the Ekati Diamond Mine, covering January 1 to December 31, 2020. The report documents wildlife monitoring activities, wildlife effects from mining development, and the effectiveness of mitigation efforts for valued ecosystem components including caribou, grizzly bears, wolves, wolverines, foxes, and raptors, with operations reduced due to COVID-19 care and maintenance status from March 20, 2020 onward.
Wildlife Caribou Monitoring Traditional Knowledge
Seepage Survey Report, Ekati Diamond Mine (Arctic Canadian Diamond Company, April 2021)
1 April 2021Report
This 2020 annual waste rock and seepage survey report for the Ekati Diamond Mine documents geochemical monitoring of waste rock storage areas and seepage quality from multiple mine pits and underground operations. The report identifies five seeps of potential concern based on exceedances of effluent quality criteria and 95th percentile screening thresholds, with detailed adaptive management responses outlined for each.
Waste Rock Acid Rock Drainage Geochemistry
Aquatic Effects Monitoring Program (AEMP) 2020 Annual Report, Cujo Lake Dissolved Oxygen Monitoring Memo, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2021)
11 March 2021Memo
This memorandum reports on 2020 mitigation and monitoring efforts for low under-ice dissolved oxygen (DO) concentrations in Cujo Lake at the Ekati Diamond Mine. An aerator installed in January 2020 failed in February and could not be repaired; monitoring showed DO concentrations fell below the CCME guideline of 6.5 mg/L by late March, with comparative monitoring at White and Alexia lakes suggesting that low under-ice DO may be driven by natural lake morphology rather than mining activities.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) 2020 Annual Report, Part 2, Statistical Report, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2021)
1 March 2021Report
This is Part 2 of the 2020 Aquatic Effects Monitoring Program (AEMP) statistical report for the Ekati Diamond Mine, presenting detailed statistical analyses of water quality, phytoplankton, zooplankton, and benthic data collected from multiple watersheds and lakes. The report employs linear mixed effects regression and Tobit regression models to compare monitored sites with reference sites across multiple years (1998-2020) to detect potential mine-related effects on aquatic ecosystems.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality

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844 documents · Page 4 of 43