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766 documents · Page 7 of 39

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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
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
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
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
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, 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 8.0, Board Directive and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, May 2018)
22 May 2018Regulatory Filing
The Wek'èezhìi Land and Water Board approved Version 8.0 of Dominion Diamond Ekati's Waste Rock and Ore Storage Management Plan and Version 2.0 of the Jay Road Construction Plan on May 17, 2018, with required revisions addressing uncertainties in the geochemical characterization of diabase rock discovered in the Lynx Pit and its suitability for construction use. The Board mandated a risk mitigation program including rock sampling, seepage monitoring, and additional geochemical analysis before diabase can be used as a construction material.
Waste Rock Regulatory 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
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
Waste Rock and Ore Storage Management Plan (WROMP), Version 8.0, Lynx Diabase, Ekati Diamond Mine (Dominion Diamond, January 2018)
25 January 2018Regulatory Filing
Dominion Diamond Ekati ULC submits updated Waste Rock and Ore Management Plan (WROMP) Version 8.0 and Jay Road Construction Plan Version 2.0 to the Wek'èezhìi Land and Water Board for approval, reflecting the discovery and management of diabase material in the Lynx Pit and its use as non-PAG construction material for roads and infrastructure.
Waste Rock Geochemistry Acid Rock Drainage
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)
Wildlife Effects Monitoring Program (WEMP), Including Caribou Road Mitigation Plan, Measure 6-1, Ekati Diamond Mine (Government of the Northwest Territories, Environment and Natural Resources, June 2017)
30 May 2017Regulatory Filing
This regulatory filing documents the Government of the Northwest Territories' approval of Dominion Diamond Ekati Corporation's Wildlife Effects Monitoring Plan (WEMP) and Caribou Road Mitigation Plan (CRMP) for the Jay Project, issued on May 30, 2017, with six conditions requiring additional information on site surveillance, raptor deterrence, blast exclusion zones, camera trapping methods, caribou monitoring, and traditional knowledge incorporation.
Wildlife Caribou Regulatory Traditional Knowledge
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
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
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) 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, 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

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766 documents · Page 7 of 39