Correspondence

Letters, memos, emails between parties (typically combine with a thematic tag)

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Wastewater and Processed Kimberlite Management Plan (WPKMP) Version 8.0 and Panda Koala Deposition Study, Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, November 2018)
29 November 2018Letter
The Independent Environmental Monitoring Agency submits detailed comments on Dominion Diamond Ekati ULC's Wastewater Processed Kimberlite Management Plan version 8.0 and Panda Koala Deposition Study, recommending contingent approval of Panda and Koala pits as processed kimberlite containment areas pending confirmation of insufficient capacity in existing facilities and raising concerns about freshwater cap depth, monitoring frequency, ammonia/nitrate exclusion, and modelling assumptions.
Correspondence Waste Rock Kimberlite Tailings
Aquatic Effects Monitoring Program (AEMP) Response Framework, Comments on Version 3.0, Ekati Diamond Mine (Independent Environmental Monitoring Agency, October 2018)
4 October 2018Letter
The Independent Environmental Monitoring Agency submits comments on Dominion Diamond's Aquatic Response Framework v3.0, challenging the proposed fluoride benchmark of 1.5 mg/L and recommending retention of the 0.27 mg/L benchmark based on toxicity data and concerns about protection of lake trout as a valued ecosystem component. The Agency also recommends inclusion of sediment quality criteria for selenium in the ARF due to increasing selenium levels observed in fish tissues and sediments in Leslie Lake.
Aquatics Water Quality Correspondence Fish Habitat
Aquatic Effects Monitoring Program (AEMP) 2017 Annual Report, Review Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, September 2018)
11 September 2018Letter
The Independent Environmental Monitoring Agency submits its review of Dominion Diamond Ekati ULC's 2017 Aquatic Effects Monitoring Plan Annual Report to the Wek'eezhii Land and Water Board, noting it is a high-quality report covering aquatic environmental impacts downstream of the Ekati mine, with comments on the Aquatic Response Framework to be submitted separately.
Aquatic Effects Monitoring (AEMP)Aquatics Correspondence
Interim Closure and Reclamation Plan (ICRP), Version 3.0, Technical Memorandum on Effective Neutralization Potential, Ekati Diamond Mine (Dominion Diamond, August 2018)
14 August 2018Letter
Dominion Diamond Ekati ULC responds to a Wek'èezhìi Land and Water Board decision requiring investigation of effective neutralization potential (NP) of waste rock at the Ekati mine, submitting a technical memorandum by Golder Associates that outlines geochemical characterization methods and two ongoing programs to determine effective NP and address uncertainty in PAG/non-PAG rock classification.
Geochemistry Waste Rock Acid Rock Drainage
Air Quality Monitoring Program (AQMP) Report 2017, Comment Letter, Ekati Diamond Mine (Independent Environmental Monitoring Agency, May 2018)
30 May 2018Letter
The Independent Environmental Monitoring Agency provides comments on Dominion Diamond Ekati ULC's 2017 Air Quality Monitoring Program Report, noting improvements but raising concerns about declining data capture rates for PM2.5 and TSP, dustfall impacts on vegetation and caribou, and the need for enhanced dust suppression and spring monitoring protocols.
Air Quality Particulate Matter Dust Deposition
Waste Rock and Ore Storage Management Plan (WROMP) Version 9.0, Sable Waste Rock Storage Area Design Report, Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, May 2018)
28 May 2018Letter
The Independent Environmental Monitoring Agency submits detailed comments on Dominion Diamond's Waste Rock and Ore Storage Management Plan version 9.0 and Sable Waste Rock Storage Area Design Report version 2.0, providing nine recommendations addressing seepage containment, acid rock drainage potential, design capacity, geotechnical investigations, adaptive management, and documentation updates.
Waste Rock Acid Rock Drainage Geochemistry
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
Waste Rock and Ore Storage Management Plan (WROMP) Version 8.0, Lynx Diabase, Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, March 2018)
28 March 2018Letter
The Independent Environmental Monitoring Agency provides detailed technical comments on Dominion Diamond's Waste Rock Ore Management Plan Version 8.0 regarding the Lynx Diabase, raising concerns about the adequacy of effective neutralizing potential analysis, sampling representativeness, and the appropriateness of using Lynx diabase as construction material for the Jay Project until further geochemical characterization is completed.
Waste Rock Acid Rock Drainage Geochemistry Development Plans
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
Traditional Knowledge Management Framework, Measure 7-1, Jay Project Environmental Assessment, Ekati Diamond Mine (Dominion Diamond, May 2017)
16 May 2017Regulatory Filing
Dominion Diamond Ekati Corporation submits a Traditional Knowledge Management Framework to the Mackenzie Valley Environmental Impact Review Board in fulfillment of Measure 7-1 of the Jay Project Environmental Assessment, establishing protocols for collecting, storing, managing, and using Traditional Knowledge from affected Aboriginal groups to inform environmental decisions throughout the mine's lifetime.
Traditional Knowledge Regulatory Development Plans Closure & Reclamation
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
Dominion Community Newsletter, Volume 2 Issue 2, Fall 2016 (Dominion Diamond, Fall 2016)
1 September 2016Report
Dominion Diamond's Fall 2016 community newsletter announces Board approval of the Jay Project development, updates on caribou engagement programs and road crossings, and provides information on permitting applications, community programs, and employment opportunities at the Ekati mine.
Development Plans Caribou Regulatory
Aquatic Effects Monitoring Program (AEMP) Fish Response Plan, Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, June 2016)
17 June 2016Letter
The Independent Environmental Monitoring Agency provides comments on Dominion Diamond Ekati Corporation's Fish Response Plan, supporting proposed studies while raising concerns about the exclusion of Leslie Lake data, the use of otoliths without historical baseline data, and recommending the inclusion of parasitism metrics alongside growth in determining medium action levels.
Aquatics Aquatic Effects Monitoring (AEMP)Correspondence
Jay Project Environmental Assessment (EA1314-01) Technical Reports, Multiple Parties (Diavik Diamond Mines, July to August 2015)
2015Letter
DDMI submits a technical report to the Mackenzie Valley Environmental Impact Review Board regarding the Jay Project environmental assessment, arguing that the proposed Jay Project would adversely affect DDMI's ability to operate and close the Diavik Mine by worsening water quality in Lac de Gras and reducing caribou use of the reclaimed mine site during the critical closure period (2023-2030).
Development Plans Water Quality Closure & Reclamation
Revised Site-Specific Water Quality Objectives for Potassium, Ekati Diamond Mine (Dominion Diamond, July 2015)
2015Report
Ekati Diamond Mine Revised Site-Specific Water Quality Objectives (SSWQO) for Potassium, Version 1.0, prepared by Dominion Diamond Ekati Corporation, July 31 2015, transmitted to Violet Camsell-Blondin, Chair, Wek'èezhii Land and Water Board, Yellowknife. Includes 21-day Chronic Freshwater Toxicity Test data using Daphnia magna (Sample ID Potassium WER-SITE, Work Order 1522, March 18 – April 2015) with daily reproduction counts and initial/final water quality measurements (pH, conductivity µS, potassium concentrations), and Appendix E.5 Selected Normal Species Sensitivity Distribution (SSD) Model Residual Normality Test results (Shapiro-Francia W', D'Agostino & Pearson's K²).
Water Quality Effluent Quality Criteria Aquatics Correspondence
Lynx Project Water Licence and Land Use Permit Public Hearing Binder, Ekati Diamond Mine (MVLWB, 2013 to 2014)
2013–2014Report
Lynx Project — Project Description and Water Licence Public Hearing binder. Includes Wek'èezhìı Land and Water Board (WLWB Wekweètì NT) hearing materials and the Dominion Diamond Project Description "Proposed Development of Lynx Kimberlite Pipe" Section 6 Environmental and Socio-Economic Risks and Mitigation (September 2013) for the Ekati Diamond Mine. Covers wildlife of greatest interest (caribou, grizzly bear, wolverine, wolf, fox, falcons), WEMP main components (wildlife incidents, caribou monitoring, grizzly bear monitoring), key Ekati issues (limit caribou disturbance, reduce permafrost-layer disturbance, reduce seepage from waste rock and processed kimberlite piles), and DFO comments on the AEMP re-evaluation. Email thread (Laura Johnston, Kim Poole, Tim Byers, Kevin O'Reilly tamarack.nt.ca) February 3 2014.
Development Plans Water Licence Regulatory Land Use Permit
Panda Diversion Channel Proposed Habitat Enhancements, Ekati Diamond Mine (BHP Billiton, December 2012)
21 December 2012Report
BHP Billiton proposes final habitat enhancements to the Panda Diversion Channel to fulfill the 1996 Fish Habitat Compensation Agreement with Fisheries and Oceans Canada, including transplantation of 139 eelgrass clumps and installation of seven rocky ramps, three groyne pairs, and boulder clusters to increase habitat variability for Arctic grayling and other fish species.
Fish Habitat Aquatics Aquatic Effects Monitoring (AEMP)Development Plans
Type A Water Licence Renewal (W2012L2-0001) Public Hearing Binder, Ekati Diamond Mine (MVLWB, February 2013)
30 November 2012Regulatory Filing
BHP Billiton's response to technical information requests from regulatory agencies and the Wek'èezhìı Land and Water Board regarding renewal of water licence W2009L2-0001 for the Ekati Diamond Mine, addressing water quality modelling, site-specific water quality objectives for chloride, nitrate and sulphate, and environmental monitoring data.
Water Licence Regulatory Water Quality
EKATI Newsbreak, Summer 2012 (BHP Billiton, June 2012)
1 June 2012Report
BHP Billiton's EKATI Diamond Mine Summer 2012 newsletter highlights operational achievements including safety milestones at the Misery project expansion, community investments in heritage centres and literacy programs, recognition of employee contributions, and partnerships with educational and charitable organizations across the Northwest Territories.
Development Plans Traditional Knowledge Exploration Correspondence
Water Licence Renewal Application, Ekati Diamond Mine, W2009L2-0001 (Ontario Ministry of the Environment, April 2012)
2012Regulatory Filing
BHP Billiton Diamonds Ekati Water Licence Renewal Application 2012 (Eric Denholm BHP Billiton Diamonds, Reference 11-1421-0018, April 23 2012). Includes Ontario Ministry of Environment Standards Development Branch's contributed Canadian Water Quality Guidelines (CWQGs) for chloride and the recently revised CWQG for nitrate to the CCME Water Quality Task Group, Buckley/Roch/McCarter/Rendell/Matheson (1982) chronic-coho-salmon copper-exposure studies, Kamunde/Grosell/Higgs/Wood (2002) copper metabolism in rainbow trout, Rescan 2012 EKATI Koala Watershed Water Quality Modelling, Ohio Administrative Code 3745-1 Division of Surface Water, Rai/Eary/Zachara (1989) chromium environmental chemistry, and Roe et al. (2010) Canadian water quality guidelines for chloride.
Water Quality Water Licence Regulatory

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