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Interim Closure and Reclamation Plan (ICRP), Version 3.1, Part 2, Ekati Diamond Mine (Arctic Canadian Diamond Company, December 2022)
1 December 2022Report
This is the Ekati Diamond Mine Interim Closure and Reclamation Plan Version 3.1 (December 2022), a comprehensive regulatory document outlining the permanent closure and reclamation strategy for the Ekati mine, expected to continue operations until 2029. The plan presents site-wide closure objectives, criteria, and detailed reclamation approaches for seven planning areas including open pits, underground workings, waste rock storage areas, processed kimberlite containment facilities, water management infrastructure, and buildings/infrastructure, with emphasis on wildlife safety, caribou movement, ecosystem restoration, and community engagement.
Closure & Reclamation Closure Plan Waste Rock Revegetation
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
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan Version 3.0, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, August 2022)
25 August 2022Regulatory Filing
The Wek'èezhìi Land and Water Board approved Version 3.0 of the Fish Response Plan for Ekati Diamond Mine on August 25, 2022, establishing action levels and response protocols for selenium and mercury in fish tissue, with site-specific human consumption screening values derived from Indigenous community surveys. The Board also directed Arctic Canadian Diamond Company to assess the Operational Water Management Strategy in relation to the updated Koala Watershed Model and to evaluate a retroactive mercury exceedance in Kodiak Lake in 2018.
Aquatics Aquatic Effects Monitoring (AEMP)Regulatory Traditional Knowledge
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
Aquatic Effects Monitoring Program (AEMP) 2021 Annual Report, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, July 2022)
19 July 2022Regulatory Filing
The Wek'èezhìi Land and Water Board approved Arctic Canadian Diamond Company's 2021 Aquatic Effects Monitoring Program (AEMP) Annual Report on July 19, 2022, with specific directions for future submissions regarding pH measurements, ammonia sampling methods, sediment sampling procedures, arsenic baseline data, chlorophyll a benchmarks, and Slimy Sculpin population trends.
Aquatic Effects Monitoring (AEMP)Water Quality Aquatics Benthic Invertebrates
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
Aquatic Effects Monitoring Program (AEMP) 2021 Annual Report, Review and Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, May 2022)
30 May 2022Letter
The Independent Environmental Monitoring Agency reviews Arctic Diamond's 2021 Ekati Aquatic Effects Monitoring Program Annual Report, identifying concerns about persistent potassium action level exceedances in Leslie Lake, elevated selenium in fish tissues near the Long Lake Containment Facility discharge, and recommending expanded integration of traditional knowledge into monitoring programs.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Water Licence Inspection Report, Ekati Diamond Mine (Government of the Northwest Territories, Environment and Climate Change, May 2022)
26 May 2022Report
Industrial water use inspection report for Ekati Diamond Mine conducted March 2 and April 20, 2022 by GNWT Department of Lands, documenting compliance with Water Licence W2020L2-0004 across multiple operational areas including fuel storage, waste management, aeration systems, and spill incidents. The inspector found no concerns and rated all inspected facilities as acceptable.
Regulatory Water Licence Inspections Water Quality
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Version 3.0, Ekati Diamond Mine (Arctic Canadian Diamond Company, May 2022)
24 May 2022Report
Arctic Canadian Diamond Company Ltd. submits Version 3.0 of the Response Plan for Fish to the Wek'èezhìi Land and Water Board, addressing low and medium action level exceedances for selenium and mercury in fish tissues at the Ekati Diamond Mine. The plan describes community engagement on fish consumption rates, evaluation of operational water management strategies, and proposes site-specific screening values for selenium and mercury in large-bodied fish.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
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) Annual Report 2021, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2022)
31 March 2022Report
Arctic Canadian Diamond Company submits the 2021 Aquatic Effects Monitoring Program (AEMP) Annual Report for Ekati Diamond Mine to the Wek'èezhìi Land and Water Board, documenting monitoring results across physical limnology, water quality, hydrology, sediment quality, and aquatic biology, with identified Action Level exceedances for five biological variables in multiple lakes.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Waste Rock and Ore Storage Management Plan (WROMP), Version 11, 2019 Seepage Survey Report, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, March 2022)
15 March 2022Regulatory Filing
The Wek'èezhìi Land and Water Board issued a Reasons for Decision on March 15, 2022, approving Arctic Canadian Diamond Company's 2019 Seepage Survey Report but rejecting Version 11.0 of the Waste Rock and Ore Storage Management Plan (WROMP), requiring substantial revisions by May 30, 2022 to address water licence compliance issues related to seepage management and geochemical characterization.
Waste Rock Acid Rock Drainage Water Quality
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

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1,662 documents · Page 6 of 84