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174 documents · Page 3 of 9

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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
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
Aquatic Effects Monitoring Program (AEMP) Chloride Response Plan Version 2.1, Letter of Review, Ekati Diamond Mine (Independent Environmental Monitoring Agency, August 2019)
19 August 2019Letter
The Independent Environmental Monitoring Agency confirms it has reviewed Dominion Diamond Mines ULC's Chloride Response Plan version 2.1 and has no concerns with the plan as submitted.
Correspondence Water Quality Regulatory
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
Aquatic Effects Monitoring Program (AEMP) Chloride Response Plan, Version 2.1, Ekati Diamond Mine (Dominion Diamond, June 2019)
19 June 2019Report
This Response Plan for Chloride Version 2.1 addresses elevated chloride concentrations in Leslie and Moose lakes downstream of the Long Lake Containment Facility at the Ekati Diamond Mine, documenting action level exceedances and proposing ongoing management through monitoring, water quality modelling, and operational optimization to ensure no adverse effects to aquatic life, wildlife, or humans.
Water Quality Regulatory Aquatics
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
Wastewater and Processed Kimberlite Management Plan (WPKMP), Version 9.0, Ekati Diamond Mine (Dominion Diamond, March 2019)
22 March 2019Regulatory Filing
Dominion Diamond Mines submits Version 9.0 of the Ekati mine Wastewater and Processed Kimberlite Management Plan to the Wek'èezhìi Land and Water Board for approval, addressing previous directives and proposing changes to operational monitoring frequency at the Long Lake Containment Facility and Panda/Koala fine processed kimberlite pipeline, while incorporating closure and reclamation planning requirements.
Wastewater Waste Rock Kimberlite Tailings
Surveillance Network Program (SNP) Monthly Report, Ekati Diamond Mine (Dominion Diamond, February 2019)
1 February 2019Report
Monthly Surveillance Network Program report for February 2019 submitted by Dominion Diamond Mines to the Wek'èezhìi Land and Water Board documenting water volumes, lake levels, minewater quantities, sewage treatment, ore production, and waste rock disposal at the Ekati Diamond Mine under Water Licence W2012L2-0001.
SNP Water Quality Monitoring
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
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)
Project Description, Jay Project Developer's Assessment Report, Section 3 (Dominion Diamond, October 2014)
1 October 2014Report
This is Section 3 (Project Description) of Dominion Diamond's Developer's Assessment Report for the proposed Jay Project, submitted to the Mackenzie Valley Review Board in October 2014. It provides comprehensive technical details of the planned extension of the Ekati Diamond Mine through development of the Jay kimberlite pipe beneath Lac du Sauvage, including construction, operations, closure phases, geological and geotechnical characterization, and use of existing mine infrastructure.
Development Plans Closure & Reclamation Waste Rock Exploration
Environmental Agreement and Water Licence Annual Report 2012, Ekati Diamond Mine (Dominion Diamond, April 2013)
1 April 2013Report
This is the 2012 Environmental Agreement and Water Licence Annual Report for the Ekati Diamond Mine, submitted by Dominion Diamond Ekati Corporation in April 2013, detailing compliance with Type A Water Licence W2009L2-0001 and the Environmental Agreement requirements. The report provides comprehensive monitoring data on water use, waste management, kimberlite processing, wildlife and aquatic effects monitoring, closure planning, spill management, and all operational activities throughout 2012.
Monitoring Regulatory Water Quality
Long Lake Containment Facility Nitrate In Situ Treatment Test, EKATI Diamond Mine (BHP Billiton, April 2012)
1 April 2012Report
This report documents the 2011 Phase IV nitrate in situ treatment test at the Long Lake Containment Facility (LLCF) of the EKATI Diamond Mine, in which monopotassium phosphate fertilizer (4.3 tonnes) was added to Cell D between July 29 and August 20 to stimulate phytoplankton growth and biological uptake of elevated nitrate concentrations. Although the test stimulated phytoplankton blooms, there was no significant reduction in the calculated nitrate load of Cell D over the 2011 open-water season; however, nitrate concentrations did not increase despite continued upstream loading.
Wastewater Water Quality Aquatics Development Plans
Wastewater and Processed Kimberlite Management Plan Version 2.0, EKATI Diamond Mine (BHP Billiton, October 2011)
20 October 2011Report
BHP Billiton's Wastewater and Processed Kimberlite Management Plan Version 2.0 (October 2011) describes the comprehensive management strategy for all wastewater and fine processed kimberlite at the Ekati Diamond Mine, submitted to the Wek'èezhii Land and Water Board for approval under Water Licence W2009L2-0001. The plan proposes significant updates to processed kimberlite deposition strategy, deferring or potentially eliminating the need for Cell D deposition by utilizing upstream areas in Cells A and C and the mined-out Beartooth Pit, while maintaining water quality standards and minimizing environmental effects in the receiving environment.
Kimberlite Tailings Wastewater Water Quality
Long Lake Containment Facility (LLCF) Nitrate In Situ Treatment Test, Ekati Diamond Mine (BHP Billiton, August 2011)
22 August 2011Letter
This report documents the 2010 Long Lake Containment Facility Nitrate In Situ Treatment Test, in which monopotassium phosphate fertilizer was applied to Cell D to stimulate phytoplankton growth and reduce nitrate concentrations. While Phase II (2009) achieved a 19% reduction in nitrate load, Phase III (2010) showed no statistically significant reduction despite residual phosphate benefits and a large early phytoplankton bloom, likely due to efficient zooplankton grazing that collapsed the bloom in late July.
Wastewater Water Quality Aquatics
Environmental Agreement and Water Licence Annual Report, Ekati Diamond Mine (BHP Billiton, April 2011)
30 April 2011Report
BHP Billiton Canada Inc.'s 2010 Environmental Agreement and Water Licence Annual Report documents compliance with Type A Water Licence W2009L2-0001 and the Environmental Agreement for the Ekati Diamond Mine. The report provides comprehensive data on water and waste management, mining operations (4.9 million tonnes of ore processed), environmental monitoring programs, spill incidents, and closure and reclamation planning with an updated liability estimate of $157 million CAD.
Environmental Agreement Water Licence Water Quality
2008/2009 Long Lake Containment Facility Nitrate In Situ Treatment Test, Ekati Diamond Mine (BHP Billiton, April 2010)
1 April 2010Report
This report documents a two-phase nitrate in situ treatment test conducted at the Long Lake Containment Facility (LLCF) at the Ekati Diamond Mine during 2008-2009, where phosphorus fertilizer additions stimulated phytoplankton growth to reduce elevated nitrate concentrations in minewater. Phase II (2009) added 16 tonnes of monopotassium phosphate to Cell D, achieving a 19% reduction in nitrate load while maintaining containment and monitoring potential secondary effects in downstream waters.
Wastewater Water Quality Aquatics Development Plans Regulatory
Long Lake Containment Facility Water Quality Prediction Model Version 2.0, Ekati Diamond Mine (BHP Billiton, March 2008)
2008Report
Long Lake Containment Facility (LLCF) Water Quality Prediction Model Version 2.0 for the Ekati Diamond Mine, prepared by BHP Billiton Diamonds Inc. (Yellowknife). Documents the new 2005 model and its 2006 findings on previously identified trends, including mine plan inputs for Panda OP/UG, Misery OP/Pushback, Koala OP/UG, Koala North OP/UG, Fox OP, Beartooth OP, Sable OP, Pigeon OP pits (April 2006 plan). Includes physical model set-up (mass balance approach across Cells C, D, E), historical process plant discharge concentrations (potassium 21.8, molybdenum 0.27, sulphate 128.9, nitrate 4.9, arsenic 0.0058 mg/L), and projected loadings June 2005-2011.
Water Quality Monitoring Wastewater Correspondence

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174 documents · Page 3 of 9