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766 documents · Page 5 of 39

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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), 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
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
Interim Closure and Reclamation Plan (ICRP) 2021 Annual Progress Report, Ekati Diamond Mine (Arctic Canadian Diamond Company, December 2021)
23 December 2021Report
Arctic Canadian Diamond Company's 2021 Annual Closure and Reclamation Progress Report documents reclamation research, activities, and monitoring completed at the Ekati Diamond Mine to meet Water Licence W2020L2-0004 reporting requirements. The report details engagement activities, reclamation research findings, completed and planned progressive reclamation activities, and updates on reclamation security held by the Government of the Northwest Territories totaling $282,126,775 as of December 31, 2021.
Closure & Reclamation Closure Plan Revegetation Waste Rock Regulatory
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
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) Annual Report 2020, Cover Letter, Ekati Diamond Mine (Arctic Canadian Diamond Company, March 2021)
31 March 2021Report
Arctic Canadian Diamond Company Ltd submits the 2020 Aquatic Effects Monitoring Program (AEMP) Annual Report for the Ekati Diamond Mine to the Wek'èezhìi Land and Water Board, documenting monitoring results during a period of reduced field sampling due to COVID-19 care and maintenance operations. The report identifies Action Level exceedances for four biological variables across multiple lakes and includes updates to water quality benchmarks and a Cujo Lake aeration strategy follow-up.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Review of 2020 Open-Water Action Level Exceedances, Potassium, Aquatic Effects Monitoring Program (AEMP), Ekati Diamond Mine (Independent Environmental Monitoring Agency, March 2021)
16 March 2021Letter
The IEMA notifies the Wek'eezhii Land and Water Board of its review of 2020 open-water action level exceedances reported by Arctic Canadian Diamond Company Ltd., expressing concerns about potential chronic effects from continued long-term low potassium exceedances.
Water Quality Aquatic Effects Monitoring (AEMP)Correspondence
Aquatic Effects Monitoring Program (AEMP) Action Level Exceedance Notification, Open-water 2020, Ekati Diamond Mine (Dominion Diamond, October 2020)
29 October 2020Letter
Dominion Diamond Mines notifies the Wek'èezhìi Land and Water Board of 2020 open-water Aquatic Response Framework Action Level exceedances: potassium at Leslie Lake (low Action Level) and total phosphorus at Cujo Lake (medium Action Level), with response plans submitted or pending.
Water Quality Aquatic Effects Monitoring (AEMP)Aquatics
Waste Rock and Ore Storage Management Plan (WROMP) Version 11 and Seepage Response Framework Version 1, Agency Comment Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, August 2020)
19 August 2020Letter
The Independent Environmental Monitoring Agency provides detailed comments on the Ekati Diamond Mine Waste Rock and Ore Storage Management Plan Version 11 and Seepage Response Framework Version 1, recommending that neither document be approved in their current form. The letter identifies concerns regarding waste rock characterization methods, acid-base testing procedures, discontinuation of Sable waste rock sampling, diabase risk mitigation monitoring, and the adequacy of seepage threshold derivation and management approaches.
Waste Rock Acid Rock Drainage Geochemistry
Water Licence and Environmental Agreement Annual Report 2019, Ekati Diamond Mine (Dominion Diamond, July 2020)
2 July 2020Report
Dominion Diamond Mines ULC's 2019 Environmental Agreement and Water Licence Annual Report documents compliance with regulatory requirements for the Ekati Diamond Mine, including water management, waste disposal, environmental monitoring programs, and operational activities across multiple mine pits and containment facilities in the Northwest Territories.
Water Licence Regulatory Monitoring
Water Licence and Environmental Agreement Annual Report 2019, Plain Language Summary, Ekati Diamond Mine (Dominion Diamond, July 2020)
2 July 2020Report
Dominion Diamond Mines' 2019 Environmental Agreement and Water Licence Annual Report Summary documents the Ekati Diamond Mine's environmental management, monitoring, and compliance activities throughout 2019. The report covers mining operations, waste management, water quality, air quality, wildlife monitoring, reclamation efforts, and regulatory compliance across multiple watersheds in the Northwest Territories.
Monitoring Water Quality Air Quality
Interim Closure and Reclamation Plan (ICRP) Version 3.0, Decision Letter and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, February 2020)
19 February 2020Regulatory Filing
The Wek'èezhìi Land and Water Board's decision letter and detailed reasons approving Dominion Diamond Mines' Interim Closure and Reclamation Plan Version 3.0 for the Ekati Diamond Mine, with conditions requiring revisions, additional engagement, a workshop by November 2020, and adjustments to security deposits and reclamation planning timelines.
Closure & Reclamation Regulatory Water Licence Fish Habitat
Aquatic Effects Monitoring Program (AEMP) 2018 Annual Report Addendum, Review Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, February 2020)
18 February 2020Letter
The Independent Environmental Monitoring Agency confirms it has reviewed the 2018 AEMP Annual Report Addendum submitted by Dominion Diamond Mines ULC and is satisfied with clarifications provided, determining that a formal review is not necessary.
Correspondence Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) 2019 Re-evaluation, Part 1, Ekati Diamond Mine (Dominion Diamond, December 2019)
13 December 2019Report
This is the 2019 Aquatic Effects Monitoring Program (AEMP) Re-evaluation for the Ekati Diamond Mine, submitted by Dominion Diamond Mines ULC to the Wek'èezhìi Land and Water Board. The report presents multivariate analyses of 21 years of AEMP data, evaluates the effectiveness of current monitoring protocols, proposes 26 recommendations for the 2020-2022 AEMP Design Plan, and includes a re-evaluation of the Aquatic Response Framework to incorporate lessons learned and address Board directives.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Surveillance Network Program (SNP) Monthly Report, Ekati Diamond Mine (Dominion Diamond, December 2019)
1 December 2019Report
Dominion Diamond Mines' Surveillance Network Program (SNP) monthly report for December 2019 under Water Licence W2012L2-0001, submitted to the Wek'èezhìi Land and Water Board, documenting water sampling results, flow measurements, containment facility volumes, minewater pumping quantities, and comprehensive analytical chemistry data from five water samples collected at Ekati monitoring stations.
SNP Water Quality Regulatory
Surveillance Network Program (SNP) Monthly Report, Ekati Diamond Mine (Dominion Diamond, November 2019)
1 November 2019Report
Dominion Diamond Mines' Surveillance Network Program (SNP) monthly report for November 2019 under Water Licence W2012L2-0001, containing water quality sampling data, flow and volume measurements from multiple mine pits and containment facilities, and analytical results for physical parameters and metals from seven water samples collected at various monitoring stations around the Ekati Diamond Mine.
SNP Water Quality Monitoring

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766 documents · Page 5 of 39