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Aquatic Effects Monitoring Program (AEMP) 2019 Re-evaluation, Appendix E, Evaluation of Effects, Ekati Diamond Mine (Dominion Diamond, December 2019)
1 December 2019Report
This report presents a graphical analysis of 2018 Aquatic Effects Monitoring Program (AEMP) data for the Koala Watershed and Lac de Gras at Ekati Diamond Mine, evaluating water quality parameters including physical variables, ions, nutrients, and metals to determine mine-related environmental effects. The analysis identifies downstream spatial gradients and increasing trends in multiple parameters relative to reference sites, with effects extending varying distances from the Long Lake Containment Facility discharge point.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Aquatic Effects Monitoring Program (AEMP) 2019 Re-evaluation, Appendix C, Statistical Results Part 2, Ekati Diamond Mine (Dominion Diamond, December 2019)
1 December 2019Report
This document is Appendix C (Part 2 of 2) of the 2019 Aquatic Effects Monitoring Program (AEMP) Re-evaluation for Ekati Diamond Mine, containing statistical results including principal components analysis of fish biology variables (age, length, weight, condition, growth) for lake trout, round whitefish, and slimy sculpin across multiple monitoring sites and years, as well as fish tissue metal concentrations and data availability assessments.
Aquatics Aquatic Effects Monitoring (AEMP)Monitoring
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
Seepage Survey Report, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, August 2019)
23 August 2019Regulatory Filing
The Wek'èezhìi Land and Water Board issued a decision on August 23, 2019 regarding Dominion Diamond Mines' 2018 Seepage Survey Report for the Ekati mine, approving discontinuance of summer rainfall sampling at Fox WRSA while directing substantial updates to the Waste Rock and Ore Storage Management Plan including tiered action levels, clarified receiving environment definitions, and enhanced adaptive management frameworks for seepage monitoring and response.
Waste Rock Water Quality Regulatory 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
Aquatic Effects Monitoring Program (AEMP) Annual Report Review, Ekati Diamond Mine (Independent Environmental Monitoring Agency, July 2019)
3 July 2019Letter
The Independent Environmental Monitoring Agency reviews Dominion Diamond Mines' 2018 Ekati Aquatic Effects Monitoring Plan Annual Report and identifies concerns regarding elevated mercury levels in Kodiak Lake trout and significantly elevated selenium concentrations in slimy sculpin and whitefish in Leslie Lake, recommending further investigation and expanded monitoring protocols.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
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
Seepage Survey Report, Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, June 2019)
14 June 2019Letter
The Independent Environmental Monitoring Agency provides detailed comments on Dominion Diamond Mines' 2018 Seepage Survey Report, recommending establishment of a new reference station unimpacted by mine activities, clarification of 'receiving environment' definitions, development of an adaptive management framework for seepage, and addressing data gaps and uncertainties in waste rock storage monitoring.
Waste Rock Water Quality Monitoring Regulatory
Air Quality Monitoring Program (AQMP) Report 2018, Agency Response Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, June 2019)
7 June 2019Letter
The Independent Environmental Monitoring Agency acknowledges receipt of Dominion Diamond Mines' 2018 Air Quality Monitoring Program Report and requests fulfillment of a 2017 commitment to amalgamate the Ekati and Jay Project air quality monitoring plans into a single site-wide plan with consolidated thresholds and triggers.
Air Quality Correspondence Monitoring Development Plans
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
Waste Rock and Waste Rock Storage Area Seepage Survey Report, Ekati Diamond Mine (Dominion Diamond, April 2019)
24 April 2019Report
This 2018 Waste Rock and Waste Rock Storage Area Seepage Survey Report documents Dominion Diamond Mines' compliance with Water Licence W2012L2-0001 requirements for monitoring seepage quality and waste rock geochemistry at the Ekati Diamond Mine. The report identifies 8 seeps of potential concern in 2018 and presents adaptive management actions, waste rock characterization data from multiple pits, and seepage monitoring results from six waste rock storage areas, concluding that no adverse effects on receiving waterbodies were detected despite elevated constituent concentrations at some seep locations.
Waste Rock Acid Rock Drainage Water Quality
Aquatic Effects Monitoring Program (AEMP) Annual Report 2018, Summary Report, Ekati Diamond Mine (Dominion Diamond, March 2019)
29 March 2019Report
The 2018 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 Pigeon-Fay/Upper Exeter) and the Horseshoe Watershed, submitted to the Wek'èezhìi Land and Water Board in compliance with Water Licence W2012L2-0001. The report evaluates physical limnology, water quality, biological communities (phytoplankton, zooplankton, benthos), and fish populations to detect mine-related effects and assess the effectiveness of mitigation measures.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality Traditional Knowledge
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
Aquatic Effects Monitoring Program (AEMP) 2018 Annual Report, Part 2, Data Report (Volume 3 of 4), Ekati Diamond Mine (Dominion Diamond, March 2019)
1 March 2019Report
This comprehensive 2018 Aquatic Effects Monitoring Program (AEMP) data report for the Ekati Diamond Mine presents detailed photographic documentation and analysis of fish health indicators (DELT assessments, parasites, cysts) across multiple lake species including round whitefish, lake trout, and slimy sculpin, along with baseline aquatic ecosystem data (1999–2017) for the Sable development area covering bathymetry, hydrology, water quality, sediment, plankton, benthos, and fish community parameters.
Aquatic Effects Monitoring (AEMP)Aquatics Monitoring
Aquatic Effects Monitoring Program (AEMP) 2018 Annual Report, Part 2, Data Report (Volume 4 of 4), Ekati Diamond Mine (Dominion Diamond, March 2019)
1 March 2019Report
Comprehensive Sable Aquatic Baseline Report documenting benthic invertebrate and fish community monitoring data collected from 1999 to 2017 in lakes and streams near the Ekati Diamond Mine in the Northwest Territories, including taxonomy, habitat assessment, tissue analysis, and quality assurance procedures.
Aquatics Benthic Invertebrates Monitoring Water Quality
Aquatic Effects Monitoring Program (AEMP) 2018 Annual Report, Part 2, Data Report (Volume 2 of 4), Ekati Diamond Mine (Dominion Diamond, March 2019)
1 March 2019Report
This is Part 2 of the 2018 Aquatic Effects Monitoring Program (AEMP) data report for Ekati Diamond Mine, containing exterior and interior photographs of round whitefish and lake trout specimens collected from multiple lakes (Kodiak, Leslie, Moose, Nema, Slipper, Cujo, Nanuq, Counts, and Vulture) during August and September 2018, with documentation of fish health indicators including lesions, parasites, and fin erosion.
Aquatic Effects Monitoring (AEMP)Aquatics Monitoring
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
Panda and Koala Deposition Study, Ekati Diamond Mine (Dominion Diamond, August 2018)
30 August 2018Report
This technical memorandum presents linked physical and chemical models for Panda, Koala North, and Koala pit lakes at the Ekati Diamond Mine to evaluate post-closure pit lake water quality following placement of fine processed kimberlite (FPK) and freshwater caps. The study investigates FPK consolidation, pore water release, inflow volumes, hydrodynamic mixing conditions, and predicts supernatant water quality over a 200-year post-closure period.
Closure & Reclamation Water Quality Waste Rock Development Plans
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

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844 documents · Page 6 of 43