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206 documents · Page 3 of 11

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Annual Water Licence Geotechnical Inspection (Government of the Northwest Territories, Environment and Climate Change, January 2023)
27 January 2023Report
Industrial water use inspection report for Ekati Diamond Mine (W2020L2-0004) conducted January 25-26, 2023 by GNWT Resource Management Officer Nahum Lee. The inspection found no major concerns across all inspected areas including Point Lake dewatering, waste facilities, fuel storage, and ammonium nitrate building, with all findings rated acceptable or not applicable.
Regulatory Water Licence Inspections Waste Rock Closure & Reclamation
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
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
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
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
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
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
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
Waste Rock Storage Area (WRSA) Seepage Framework Discussion, Ekati Diamond Mine (Dominion Diamond, November 2019)
~2019Presentation
Approximate date — inferred from filename
Dominion Diamond Mines presents a framework for managing Waste Rock Storage Area (WRSA) seepage in response to a WLWB directive, proposing ecologically-derived thresholds and adaptive management action levels to replace Environmental Quality Criteria as the regulatory control for seepage monitoring and response.
Waste Rock Water Quality Regulatory Development Plans
Surveillance Network Program (SNP) Monthly Report, Ekati Diamond Mine (Dominion Diamond, September 2019)
1 September 2019Report
Dominion Diamond Mines' Surveillance Network Program monthly report for September 2019 under Water Licence W2012L2-0001, documenting 24 water samples collected from monitoring stations across the Ekati Diamond Mine with field parameters and comprehensive analytical results for physical, chemical, and metal constituents.
SNP Water Quality Monitoring
Surveillance Network Program (SNP) Monthly Report, Ekati Diamond Mine (Dominion Diamond, August 2019)
1 August 2019Report
Dominion Diamond Mines' Surveillance Network Program (SNP) monthly report for August 2019 under Water Licence W2012L2-0001, documenting 30 water samples collected from various monitoring stations at Ekati Diamond Mine, with detailed field parameters, analytical results for metals, nutrients, and other water quality indicators, plus flow and volume measurements for water sources, discharges, and mining operations.
SNP Water Quality Monitoring
Wastewater and Processed Kimberlite Management Plan (WPKMP), Version 9.0, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, June 2019)
13 June 2019Regulatory Filing
The Wek'èezhìi Land and Water Board approved Dominion Diamond Mines' Wastewater and Processed Kimberlite Management Plan (WPKMP) Version 9.0 on June 13, 2019, which addresses previous board direction and proposes reduced inspection frequency for processed kimberlite deposition into Panda and Koala pits. The decision includes requirements for closure and reclamation planning consistency with the approved Interim Closure and Reclamation Plan.
Regulatory Water Licence Wastewater
Surveillance Network Program (SNP) Monthly Report, Ekati Diamond Mine (Dominion Diamond, June 2019)
1 June 2019Report
Dominion Diamond Mines' June 2019 Surveillance Network Program monthly report for Water Licence W2012L2-0001, containing 24 water samples collected from various monitoring stations at Ekati Diamond Mine with comprehensive field parameters and analytical results for physical, chemical, and metal constituents.
SNP Water Quality Monitoring
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Version 1.2, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, April 2019)
24 April 2019Regulatory Filing
The Wek'èezhìi Land and Water Board issued a Reasons for Decision on April 24, 2019 rejecting Dominion Diamond Mines' Ekati Aquatic Effects Monitoring Program (AEMP) Fish Response Plan Version 1.2, but establishing specific Medium and High Action Levels for selenium in fish tissue and directing submission of a revised Version 1.3 within 90 days with Medium and High Action Levels for all Low Action Level exceedances.
Aquatic Effects Monitoring (AEMP)Aquatics Regulatory
Wastewater and Processed Kimberlite Management Plan (WPKMP), Version 8.0, Ekati Diamond Mine (Dominion Diamond, September 2018)
10 September 2018Regulatory Filing
Dominion Diamond Ekati ULC submits Version 8.0 of the Wastewater and Processed Kimberlite Management Plan and a Panda/Koala Deposition Study to the Wek'èezhìi Land and Water Board, requesting approval to commence Fine Processed Kimberlite deposition into the Panda/Koala Processed Kimberlite Containment Area in early 2019, with updated site-wide management procedures incorporating the Jay and Misery Underground Projects.
Regulatory Water Licence Wastewater
Interim Closure and Reclamation Plan (ICRP), Version 3.0, Part 1, Ekati Diamond Mine (Dominion Diamond, August 2018)
15 August 2018Regulatory Filing
Dominion Diamond Ekati ULC submits Interim Closure and Reclamation Plan Version 3.0 to the Wek'èezhìi Land and Water Board, updating the 2011 approved plan to incorporate the 2018 life-of-mine plan, new research findings, regulatory requirements, and closure strategies for all permitted disturbed areas at the Ekati Diamond Mine in the Northwest Territories, with operations scheduled to continue until 2035.
Closure & Reclamation Closure Plan Regulatory
Waste Rock and Ore Storage Management Plan (WROMP), Version 9.0, Board Directive and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, June 2018)
27 June 2018Regulatory Filing
The Wek'èezhìi Land and Water Board approved Version 9.0 of Dominion Diamond Ekati ULC's Waste Rock and Ore Storage Management Plan and Version 2.0 of the Sable Waste Rock Storage Area Design Report on June 20, 2018, with conditions requiring revisions regarding East WRSA placement restrictions, geochemical uncertainty resolution, geotechnical stability confirmation, and technical corrections.
Waste Rock Regulatory Water Licence Acid Rock Drainage

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206 documents · Page 3 of 11