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821 documents · Page 8 of 42

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Interim Closure and Reclamation Plan (ICRP), Version 3.0, Part 2, Open Pits, Ekati Diamond Mine (Dominion Diamond, August 2018)
1 August 2018Report
This section of the Ekati Mine Interim Closure and Reclamation Plan (ICRP) Version 3.0 from August 2018 details closure objectives, criteria, and engineering works for open pits at the Ekati Diamond Mine. It presents pit-by-pit evaluations for constructing littoral zones to enhance ecological complexity in pit lakes, water quality modelling predictions, and community engagement outcomes regarding pit lake closure and reclamation strategies.
Closure & Reclamation Closure Plan Aquatics Traditional Knowledge
Aquatic Effects Monitoring Program (AEMP) Response Framework, Version 3.0, Ekati Diamond Mine (Dominion Diamond, June 2018)
29 June 2018Report
Dominion Diamond submits the updated Aquatic Response Framework Version 3.0 for the Ekati Diamond Mine to the Wek'èezhìi Land and Water Board, proposing a fluoride benchmark of 1.5 mg/L and responding to regulatory comments on action levels, significance thresholds, and fish tissue residue assessment.
Water Quality Aquatic Effects Monitoring (AEMP)Aquatics
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Version 1.2, Ekati Diamond Mine (Dominion Diamond, June 2018)
25 June 2018Report
Dominion Diamond Ekati ULC submits Version 1.2 of the Response Plan for Fish to the Wek'èezhìi Land and Water Board, addressing low action level exceedances for antimony, molybdenum, selenium, uranium, and EROD activity in fish tissue detected in the 2012 Aquatic Effects Monitoring Program. The plan proposes low, medium, and high action levels with rationale for response actions to manage mine-related changes in fish tissue contaminants while maintaining protection of the aquatic receiving environment.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Waste Rock and Ore Storage Management Plan (WROMP), Version 9.0, Sable Waste Rock Storage Area Design Report, Ekati Diamond Mine (Dominion Diamond, April 2018)
26 April 2018Letter
Dominion Diamond Ekati ULC submits the Sable Waste Rock Storage Area Design Report Version 2.0 and Waste Rock and Ore Management Plan Version 9.0 to the Wek'èezhìi Land and Water Board for approval, proposing a 30 m setback distance from the Two Rock Sedimentation Pond and addressing Board concerns regarding adequate space for seepage monitoring and closure adaptive management actions.
Waste Rock Regulatory Development Plans Water Quality Closure & Reclamation
100th Board Meeting, Summary of Discussion, Ekati Diamond Mine (Independent Environmental Monitoring Agency, March 2018)
13 March 2018Meeting Minutes
The Independent Environmental Monitoring Agency held its 100th Board of Directors meeting on March 13-14, 2018 in Yellowknife to discuss ongoing monitoring projects, regulatory correspondence, and updates on Dominion Diamond operations including the Jay Project, Misery Underground, and other exploration activities at Ekati Diamond Mine.
Board Meetings Minutes Water Quality
Three Year Seepage Report, Board Directive and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, January 2018)
25 January 2018Regulatory Filing
The Wek'èezhìi Land and Water Board approved Dominion Diamond Ekati ULC's 2016 Three-Year Seepage Survey Report (2014-2016) on January 25, 2018, and issued directives requiring submission of revised monitoring plans, waste rock management updates, and closure risk assessments with the 2017 Annual Seepage Report.
Regulatory Water Licence Waste Rock
98th Board Meeting, Summary of Discussion, Ekati Diamond Mine (Independent Environmental Monitoring Agency, September 2017)
14 September 2017Meeting Minutes
The Independent Environmental Monitoring Agency held its 98th Board of Directors meeting on September 12-14, 2017 in Yellowknife, including a site visit to Ekati Diamond Mine. The meeting covered presentations on the Misery Underground Project, WROMP 7.0 waste rock expansion, Fox Deep project, and the pending sale of Dominion Diamond Ekati Corporation to Washington Corp, along with discussions on water management, caribou crossings, waste rock facilities, and Agency administrative matters.
Board Meetings Minutes Development Plans Closure & Reclamation
Aquatic Effects Monitoring Program (AEMP) 2016 Annual Report, Review and Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, July 2017)
7 July 2017Letter
The Independent Environmental Monitoring Agency reviews Dominion Diamond Ekati Corporation's 2016 Aquatic Effects Monitoring Plan Annual Report and provides comments on water quality exceedances in Koala and King-Cujo watersheds, recommendations for improved data visualization, and recommendations for harmonizing monitoring methodologies with Diavik to address cumulative impacts on Lac de Gras.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
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)
Aquatic Effects Monitoring Program (AEMP) Part 1, Evaluation of Effects, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
The 2016 Aquatic Effects Monitoring Program (AEMP) annual report for the Ekati Diamond Mine evaluates aquatic effects across multiple watersheds through comprehensive monitoring of physical limnology, water quality, and aquatic biology. The report compares 2016 monitoring results to predicted water quality benchmarks and historical baseline data to assess mine-related impacts on lakes and streams.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Waste Rock and Waste Rock Storage Area Seepage Survey Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This 2016 Waste Rock and Waste Rock Storage Area Seepage Survey Report documents monitoring of waste rock storage areas and seepage quality at the Ekati Diamond Mine, prepared by SRK Consulting for Dominion Diamond Ekati Corporation in compliance with Water Licence W2012L2-0001. The report presents results from waste rock sampling, coarse kimberlite reject characterization, and seepage monitoring conducted during freshet, summer, and fall surveys across multiple mine areas including Panda/Koala, Fox, Misery, Pigeon, and Lynx.
Waste Rock Acid Rock Drainage Geochemistry
Aquatic Effects Monitoring Program (AEMP) Summary Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This is the 2016 Aquatic Effects Monitoring Program (AEMP) Summary Report for the Ekati Diamond Mine, submitted by Dominion Diamond Ekati Corporation to the Wek'èezhìi Land and Water Board under Water Licence W2012L2-0001. The report documents comprehensive monitoring of aquatic ecosystems across multiple watersheds (Koala, King-Cujo, Pigeon-Fay, Upper Exeter, and Carrie Pond) to detect changes potentially caused by mine activities, evaluating physical limnology, water quality, and biological parameters including phytoplankton, zooplankton, and benthos communities.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) Part 2, Data Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This is the 2016 Aquatic Effects Monitoring Program Part 2 – Data Report for the Ekati Diamond Mine, submitted to the Wek'èezhìi Land and Water Board in March 2017. The report presents comprehensive field methodology and detailed monitoring data for aquatic environmental components including hydrology, physical limnology, water quality, phytoplankton, zooplankton, and benthic invertebrates collected from October 2015 to September 2016 across multiple lakes and streams in four watersheds surrounding the mine.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2016 Annual Report, Part 3 - Statistical Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This is Part 3 of the 2016 Aquatic Effects Monitoring Program (AEMP) annual report for Ekati Diamond Mine, submitted to the Wek'èezhìi Land and Water Board under Water Licence W2012L2-0001. The document presents detailed statistical analyses of water quality, plankton, and benthic data collected from monitored and reference lakes in multiple watersheds, using linear mixed effects regression and before-after-control-impact (BACI) design methodologies to evaluate potential mine-related effects on aquatic ecosystems.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Environmental Impact Report, Final Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, January 2017)
11 January 2017Letter
The Independent Environmental Monitoring Agency provides final review comments on Dominion Diamond Ekati Corporation's 2016 Environmental Impact Report, approving it for submission while offering recommendations for improvement across chapters on environmental management, air quality, land use, water quality, and wildlife monitoring.
Development Plans Correspondence Monitoring
Environmental Impact Report 2016 Plain Language Summary, Ekati Diamond Mine (Dominion Diamond, September 2016)
1 September 2016Report
This 2016 Environmental Impact Report Plain English Summary from Dominion Diamond Ekati Corporation describes the ongoing environmental management and monitoring at the Ekati Diamond Mine in the Northwest Territories, covering mining activities from 2012-2015, key environmental risks across air, land, water, and wildlife categories, and future operations planned through 2018. The report fulfills requirements of the 1997 Environmental Agreement and details adaptive management practices, community engagement, and compliance with regulatory instruments including water licences and Fisheries Act authorizations.
Development Plans Monitoring Environmental Agreement
Aquatic Effects Monitoring Program (AEMP) Selenium Response Plan, Version 1.0, Ekati Diamond Mine (Dominion Diamond, August 2016)
31 August 2016Report
Dominion Diamond Ekati Corporation's Aquatic Response Plan for Selenium addresses the exceedance of low action levels for selenium in Cujo Lake detected during 2016 under-ice monitoring, caused by discharge of selenium-elevated water from the King Pond Settling Facility resulting from pumping of Misery Pit and Desperation Pond water in 2015. The plan proposes continued AEMP monitoring and a literature review on selenium toxicology to establish medium and high action levels, with an interim medium action level of 0.0015 mg/L based on US EPA criteria for lentic environments.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Version 1.0, Ekati Diamond Mine (Dominion Diamond, April 2016)
30 April 2016Report
This Aquatic Response Plan for Fish addresses low action level exceedances detected in 2012 for tissue metals (antimony, molybdenum, selenium, uranium) and EROD activity in lake trout and round whitefish at the Ekati Diamond Mine, submitted to the Wek'èezhìi Land and Water Board in compliance with Water Licence W2012L2-0001. The report describes the likely causes of exceedances (elevated metal concentrations in water and sediments downstream of the Long Lake Containment Facility and King Pond Settling Facility), ecological implications, and proposes response actions including toxicology literature review and fish growth studies to establish medium and high action levels.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Aquatic Effects Monitoring Program (AEMP) 2015 Annual Report, Summary Report, Ekati Diamond Mine (Dominion Diamond, March 2016)
31 March 2016Report
The 2015 Aquatic Effects Monitoring Program (AEMP) Summary Report documents the comprehensive annual monitoring of aquatic ecosystems at the Ekati Diamond Mine across four watersheds (Koala, King-Cujo, Carrie Pond, and Pigeon-Fay/Upper Exeter), assessing water quality, physical limnology, and biological communities to detect mine-related environmental changes. The report includes evaluation of effects, action level exceedances under the Aquatic Response Framework, and response plans for nitrogen and potassium exceedances.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2015 Annual Report, Part 1, Evaluation of Effects, Ekati Diamond Mine (Dominion Diamond, March 2016)
1 March 2016Report
The 2015 Aquatic Effects Monitoring Program (AEMP) Part 1 report evaluates aquatic environmental effects from the Ekati Diamond Mine across four watersheds (Koala, King-Cujo, Pigeon-Fay, and Upper Exeter) and reference lakes, analyzing water quality, physical limnology, plankton, benthos, and fish populations from 1994–2015 baseline and operational data.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality

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821 documents · Page 8 of 42