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This special newspaper edition celebrates the grand opening of Ekati Diamond Mine on October 14, 1998, Canada's first operational diamond mine, highlighting its construction completion on budget at $700 million, employment of 440 staff with aboriginal hiring preference, and comprehensive environmental monitoring program in the Lac de Gras area near Yellowknife.
A special newspaper edition celebrating the grand opening of Ekati, Canada's first diamond mine, on October 14, 1998, operated by BHP Diamonds Inc. and Dia Met Minerals. The document contains extensive congratulatory messages from northern suppliers and service providers, articles detailing the mine's operations, environmental practices, employment of northern and aboriginal workers, telecommunications infrastructure, and the 25-year development history of the project near Lac de Gras in the Northwest Territories.
A critical technical review by Chris Mills of BHP Diamonds Inc.'s tailings characterization study and wastewater/tailings management plan for the Ekati Diamond Mine, prepared for IEMA in September 1998. The review examines changes to mill design producing finer tailings (nominally minus 500 µm) and assesses associated impacts on water quality, tailings behaviour, and Long Lake impoundment management.
HydroQual Laboratories conducted a comprehensive toxicity characterization of Fox and Panda kimberlite from BHP Diamonds Inc.'s diamond mining operations in the Northwest Territories, testing effects on multiple freshwater organisms and assessing sublethal health impacts on juvenile rainbow trout exposed to kimberlite suspensions over 30 days.
British Columbia Ministry of Energy and Mines guidelines for predicting, preventing, and mitigating metal leaching and acid rock drainage (ML/ARD) at minesites, establishing a phased approach to characterization, prediction, and mitigation strategies including underwater storage, blending, covers, and drainage treatment.
British Columbia Ministry of Energy and Mines guidelines document providing comprehensive requirements and best practices for predicting, preventing, and mitigating metal leaching and acid rock drainage at mining sites, including prediction methodologies, mitigation strategies, and regulatory frameworks.
BHP Diamonds' August 1998 company newsletter reports on the imminent operational startup of Canada's first diamond mine at Ekati, including the construction of a Yellowknife sorting facility, hiring achievements exceeding targets for northern and aboriginal employment, environmental monitoring programs for fish and caribou, and comprehensive safety and security measures in preparation for the October 1998 official opening.
BHP Diamonds Inc. submitted a Waste Rock and Ore Storage Management Plan for the Ekati Diamond Mine detailing geochemical characterization, testing methodologies, water quality predictions, and mitigation strategies for managing drainage from waste rock and ore storage facilities at four kimberlite pipes (Panda, Koala, Misery, and Fox) in the Northwest Territories.
Diamond Watch newsletter reports on diamond exploration developments in the Northwest Territories, including the Diavik Project environmental assessment timeline and BHP's potential restructuring of its World Minerals division, along with the first report from the Ekati Mine Independent Environmental Monitoring Agency containing recommendations on environmental monitoring and management practices.
This multi-part final report documents a dose-response study of rainbow trout exposed to kimberlite ore tailings at 50 and 500 mg/L concentrations over 15 and 30 days, assessing histopathological changes in gills, liver and kidney, serum hormone levels (cortisol, estradiol, testosterone), and immunological parameters including phagocytic function and lymphoproliferation. The studies collectively demonstrate that kimberlite exposure caused adverse effects at all tested concentrations, with LOEC/LOAEC estimated below 50 mg/L, and immunomodulatory effects dependent on dose and exposure duration.
This British Columbia policy establishes regulatory requirements and guiding principles for managing metal leaching and acid rock drainage (ML/ARD) at minesites. It prescribes a three-step prediction and mitigation process and outlines various strategies including avoidance, underwater storage, covers, blending, and drainage collection and treatment.
A hydrological study commissioned by DIAND and conducted in July 1997 with Lutsel K'e and Yellowknives Dene First Nations to investigate whether water flows from Lac de Gras southward into the Aylmer Lake-Lockhart River system, concluding that there is no surface outflow from Lac de Gras to the south based on aerial and ground surveys of the drainage divide.
This 1997 compliance report evaluates BHP Diamonds Inc.'s adherence to water licence N7L2-1616 for the Ekati Diamond Mine, documenting dewatering of multiple lakes, water use volumes, waste management plans, surveillance network monitoring, and 19 inspections with findings on water quality exceedances, spills, and remediation efforts throughout the year. The licensee's overall compliance is deemed satisfactory despite instances of non-compliance with effluent quality standards and delays in submitting required management plans.
This tailings characterization study documents the physical and chemical properties of Panda and Fox kimberlite tailings from the Ekati Diamond Mine, including effects of polymer treatment, thickening processes, and thermal behaviour to support tailings disposal facility design and operations at Long Lake.
Lac de Gras Drainage Basin Study by Bob Reid (DIAND Water Resources), Fred Sangris (Yellowknives Dene First Nation, Dettah) and Lawrence Catholique (Lutsel K'e Dene First Nation), June 1998. Transmitted to David Milburn, Manager Water Resources Division, INAC Yellowknife (PO Box 1500). Documents ground-survey heights-of-land near Thonokied Lake / MacKay Lake (64°21'N 110°00'W) on eskers, winter-road portage Site 3 with Echo Bay road camp, and Site 4 ground survey northwest of Seahorse Lake with Yellowknives Dene representatives. Appendix 4 contains Yellowknives Dene First Nation comments (Box 2514 Yellowknife).
This is the Wastewater and Tailings Management Plan for the Ekati Diamond Mine, detailing the handling and disposal of all mine-related wastewater and 133 million tonnes of tailings over 25 years of operation. The plan describes tailings discharge into Long Lake Containment Area cells, water treatment processes, pit dewatering, sewage treatment, and monitoring protocols required under Northwest Territories Water License N7L2-1616.
This wastewater and tailings management plan for the Ekati Diamond Mine details the handling of 133 million tonnes of mine tailings over 25 years of operation, including tailings disposal in Long Lake containment area cells, water treatment and discharge protocols, pit water management, and camp sewage systems. The plan addresses tailings characterization, consolidation behavior, seasonal deposition patterns, and monitoring requirements to ensure compliance with water license conditions.
This report documents the 1997 fish-out program at Misery Lake in preparation for open-pit diamond mining development. A total of 146 lake trout were captured and removed using gill nets across three fishing sessions, with biological data collected on weight, length, sex, maturity, and aging structures for subsequent analysis by fisheries authorities.
This wastewater and tailings management plan for the Ekati Diamond Mine describes comprehensive strategies for handling 133 million tonnes of tailings over 25 years of operation, including tailings containment in Long Lake cells, water treatment, pit dewatering, camp sewage management, and monitoring protocols to ensure compliance with NWT water licence requirements.
This report documents the 1997 fish-out program at Misery Lake conducted by Rescan Environmental Services for BHP Diamonds Inc. in preparation for lake drainage and open pit mining development. A total of 146 lake trout were captured and removed using gill nets over 21 days of fishing, with biological data collected on size, weight, condition, and reproductive status to comply with fisheries authorization requirements.