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The Independent Environmental Monitoring Agency reviews and comments on proposed changes to the Aquatic Effects Monitoring Program (AEMP) Version 8.1, supporting the acceleration of sediment and invertebrate sampling to 2025 and the removal of non-lethal Slimy Sculpin sampling in 2025, given that Low Action Level thresholds have been met.
Water Licence inspection report for Ekati Diamond Mine (Arctic Canadian Diamond Company) conducted on May 22, 2025, documenting compliance with Water Licence W2022L2-0001. The inspection covered sampling procedures, Misery Laydown, underground fresh air raise, airport culverts, ammonium nitrate building, and main camp refuelling, with no major concerns identified but minor maintenance issues noted.
Burgundy Diamond Mines proposes two changes to the Ekati Mine Aquatic Effects Monitoring Program (AEMP) Design Plan Version 8.1 under Water Licence W2022L2-0001: to conduct sediment quality and benthic invertebrate sampling in 17 AEMP lakes in 2025 rather than 2026 to align with MDMER Cycle 2 EEM requirements, and to discontinue non-lethal Slimy Sculpin sampling in 2025 because mine-related effects have now been conclusively demonstrated and sufficient data has been collected.
Burgundy Diamond Mines Ltd. submits the 2024 Environmental Agreement and Water Licence Annual Report for the Ekati Diamond Mine in the Northwest Territories, detailing compliance with regulatory requirements and comprehensive environmental monitoring across air quality, water quality, wildlife, and land management. The report documents mining activities, infrastructure development, environmental effects monitoring results, and mitigation measures implemented throughout 2024.
Burgundy Diamond Mines submits Version 11.0 of the Ekati Diamond Mine Wastewater and Processed Kimberlite Management Plan to the Wek'èezhìi Land and Water Board, incorporating six revisions required by the Board's March 1, 2024 decision on Version 10.0. The plan describes management of minewater, sewage, and fine processed kimberlite across multiple mine sites and containment facilities to ensure compliance with Water Licence W2022L2-0001.
Monthly surveillance network program report for May 2025 submitted by Burgundy Diamond Mines to the Wek'èezhìi Land and Water Board in compliance with Water Licence W2022L2-0001, including water sampling results, flow and volume measurements, lake levels, waste management data, ore production, and comprehensive water quality analysis from Bureau Veritas laboratory.
Burgundy Diamond Mines submits the April 2025 Surveillance Network Program Monthly Report for Water Licence W2022L2-0001, including a correction to March sewage effluent data due to flow meter malfunction and comprehensive water quality monitoring data from station 1616-46b collected on April 6, 2025.
The Wek'èezhìı Land and Water Board approved Version 13.0 of the Waste Rock and Ore Storage Management Plan (WROMP) for the Ekati Diamond Mine on February 28, 2025, and directed submission of Version 13.1 within 90 days with 16 specified revisions addressing seepage monitoring, thermal data collection, waste rock characterization, and closure planning requirements.
Land Use Permit inspection report for the Misery Underground development at Ekati Diamond Mine conducted on December 16, 2025, documenting compliance with permit conditions across underground mining operations, water management, waste handling, and facility maintenance with no concerns identified.
Burgundy Diamond Mines' February 2025 Surveillance Network Program monthly report for Water Licence W2022L2-0001, submitted to the Wek'èezhìi Land and Water Board, documenting water volumes, quality parameters, and operational metrics from the Ekati Diamond Mine with accompanying laboratory analysis certificates from Bureau Veritas.
The Independent Environmental Monitoring Agency submits detailed comments on Burgundy Diamond Mines' Waste Rock and Ore Management Plan (WROMP) Version 13.0, identifying deficiencies in thermal monitoring of waste rock storage areas, seepage evaluation methodologies, geochemical characterization, and closure planning documentation for the Ekati Diamond Mine.
This report presents a comprehensive investigation of elevated mercury concentrations in large-bodied fish (lake trout and round whitefish) from Kodiak Lake at the Ekati Diamond Mine, including desktop analysis of historical monitoring data (1997–2018) and a 2023 field study of total and methylmercury in water and sediments. Key findings indicate that higher fish mercury concentrations are strongly correlated with wetland influences, elevated primary productivity, and Kodiak Lake's larger drainage area relative to reference lakes, rather than direct mine discharge.
Burgundy Diamond Mines Ltd. submits the 2024 Water Licence Annual Report for Ekati Diamond Mine covering 2023 operations, detailing compliance with Type A Water Licence W2022L2-0001 and the Environmental Agreement, including water management, waste disposal, kimberlite processing, waste rock storage, seepage monitoring, and aquatic effects monitoring.
The Wek'èezhìı Land and Water Board's decision letter rejecting Closure and Reclamation Plan Version 3.1 for the Ekati Diamond Mine and establishing requirements for future submissions, including component-specific final CRPs for Pigeon Development, closure criteria advancement, reclamation research reports, and a back-flooding plan for the Pigeon Pit.
This 2023 Waste Rock and Waste Rock Storage Area Seepage Survey Report documents the geochemical monitoring of waste rock and coarse kimberlite rejects, and seepage quality monitoring at multiple waste rock storage areas at the Ekati Diamond Mine. The report identifies 12 seeps of potential concern based on exceedances of effluent quality criteria or 95th percentile historical thresholds, with detailed temporal trend analysis and adaptive management recommendations for each waste rock storage area.
The 2023 Aquatic Effects Monitoring Program (AEMP) annual report for the Ekati Diamond Mine documents surveillance network sampling results and aquatic effects evaluation across four watersheds (Koala, King-Cujo, Pigeon-Fay/Upper Exeter, and Horseshoe) and associated downstream lakes. The report presents water quality, sediment quality, and aquatic biology data collected throughout 2023, identifies mine-related effects through comparison to action levels and benchmarks, and describes adaptive management responses through the Aquatic Response Framework.
The Independent Environmental Monitoring Agency submits final review comments on Burgundy Diamond Mines' 2022 Environmental Impact Report for the Ekati Diamond Mine, rating it as satisfactory overall but recommending improvements in plain language communication, air quality standards documentation, caribou movement monitoring methodology, and dustfall monitoring protocols.
The Independent Environmental Monitoring Agency submits detailed comments on Burgundy Diamond Mines' Wastewater and Processed Kimberlite Management Plan v10.0 for the Ekati Mine, identifying concerns regarding tailings management compliance, water monitoring gaps, pit capacity risks, and closure planning requirements, with specific recommendations for remedial actions.
The Wek'èezhìı Land and Water Board approved Version 12.0 of the Waste Rock and Ore Management Plan (WROMP) for the Ekati Diamond Mine on January 31, 2024, with conditions requiring submission of Version 13.0 within 90 days of Seepage Response Framework approval and increased seep screening frequency until the framework is implemented.
The Wek'èezhìı Land and Water Board approved Arctic Canadian Diamond Company's 2022 3-Year Waste Rock Storage Area Seepage Survey Report on January 31, 2024, with requirements for future improvements and development of a Seepage Response Framework to address concerns about seep screening criteria, adaptive management responses, and EQC exceedances.