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472 documents · Page 17 of 24

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Critical Technical Review of BHP Tailings Characterization Study & Wastewater and Tailings Management Plan, Ekati Diamond Mine (Chris Mills, September 1998)
1 September 1998Report
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.
Waste Rock Kimberlite Tailings Wastewater
Characterization of Kimberlite Toxicity to Aquatic Life Forms (HydroQual, August 1998)
11 August 1998Report
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.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Guidelines for Metal Leaching and Acid Rock Drainage (ML/ARD) at Minesites in British Columbia (BC Ministry of Energy and Mines, August 1998)
1 August 1998Report
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.
Acid Rock Drainage Waste Rock Geochemistry
Guidelines for Metal Leaching and Acid Rock Drainage at Minesites in British Columbia (BC Ministry of Energy and Mines, August 1998)
1 August 1998Report
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.
Acid Rock Drainage Waste Rock Geochemistry
Waste Rock & Ore Storage Management Plan, Ekati Diamond Mine, Revision 2 (BHP Billiton, July 1998)
31 July 1998Report
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.
Waste Rock Acid Rock Drainage Geochemistry
CARC Correspondence & Materials on the BHP EARP Panel Review, Ekati Diamond Mine (BHP Billiton, 1996 to 1997)
31 July 1998Report
BHP Diamonds Inc.'s comprehensive Waste Rock and Ore Storage Management Plan (Revision 2, July 31, 1998) for the Ekati Diamond Mine details geochemical sampling methodology, predictive and operational testing programs, and environmental monitoring protocols to assess acid rock drainage potential and ensure compliance with regulatory requirements. The document also includes critical commentary from the Canadian Arctic Resources Committee (CARC) on the environmental review process, identifying procedural deficiencies, financial resource constraints, and recommending conditions for project approval including Impact and Benefit Agreements, independent monitoring committees, and enhanced regulatory oversight.
Waste Rock Acid Rock Drainage Geochemistry Monitoring
Diamond Watch Newsletter, Volume 1 Number 1 (Canadian Arctic Resources Committee, July 1998)
14 July 1998Report
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.
Monitoring Development Plans Environmental Agreement Water Quality Waste Rock Wildlife
Histopathological, Endocrine & Immunological Assessment of Rainbow Trout Exposed to Kimberlite Ore Tailings (GLOBALTOX, July 1998)
6 July 1998Report
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.
Aquatics Kimberlite Tailings Waste Rock
Policy for Metal Leaching and Acid Rock Drainage at Minesites in British Columbia (BC Ministry of Energy and Mines & Ministry of Environment, Lands and Parks, July 1998)
1 July 1998Report
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.
Acid Rock Drainage Waste Rock Geochemistry
Compliance Report, Class 'A' Water Licence N7L2-1616, Ekati Diamond Mine (BHP Billiton, June 1998)
1 June 1998Report
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.
Regulatory Water Licence Water Quality
BHP Tailings Characterization Study, Panda & Fox Kimberlite Tailings, Ekati Diamond Mine (EBA Engineering, June 1998)
1 June 1998Report
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.
Kimberlite Tailings Waste Rock Geochemistry Development Plans
Project Descriptions, Ekati Diamond Mine (BHP Billiton, 1998 to 2001)
1 June 1998Report
EBA Engineering's final design report for the Long Lake intermediate dykes at Ekati Diamond Mine, detailing the engineering design, site geotechnical conditions, stability analyses, and construction specifications for four rockfill retention dykes to subdivide the tailings basin into five cells.
Development Plans Waste Rock Regulatory Wastewater Correspondence
Wastewater and Tailings Management Plan, Ekati Diamond Mine (EBA Engineering, June 1998)
1 June 1998Report
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.
Wastewater Kimberlite Tailings Waste Rock
Wastewater and Tailings Management Plan, Ekati Diamond Mine (EBA Engineering, June 1998)
1 June 1998Report
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.
Wastewater Waste Rock Kimberlite Tailings
Wastewater and Tailings Management Plan, Ekati Diamond Mine (EBA Engineering, June 1998)
1 June 1998Report
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.
Wastewater Waste Rock Kimberlite Tailings
Environmental Agreement Annual Report 1997, Ekati Diamond Mine (BHP Billiton, April 1998)
30 April 1998Report
BHP Diamonds Inc.'s 1997 annual report for the Ekati Diamond Mine documents the first year of construction and regulatory compliance under the Environmental Agreement and Water Licence N7L2-1616. The report covers construction progress (approximately 75% complete by year-end 1997), water management activities including dewatering of multiple lakes, comprehensive environmental monitoring results for aquatic ecosystems and wildlife, and compliance with water quality standards and discharge requirements.
Monitoring Water Quality Aquatics
Dia Met Minerals Ltd. Annual Reports, Ekati Diamond Mine (Dia Met Minerals, 1997 to 1999)
29 April 1998Report
Dia Met Minerals Ltd. annual report for fiscal year 1997-1998 detailing the development of the Ekati Diamond Mine in the Northwest Territories, Canada's first commercial diamond mine, scheduled to commence production in October 1998. The report covers mine construction progress (85% complete by April 1998), the joint venture structure, exploration activities across multiple continents, financial position, and environmental and socioeconomic considerations.
Development Plans Exploration Monitoring Waste Rock
Operating Environmental Management Plan, Ekati Diamond Mine (BHP Billiton, April 1998)
1 April 1998Report
BHP Diamonds Inc.'s Operating Environmental Management Plan for the Ekati Diamond Mine, detailing comprehensive operational management procedures for mining, mineral processing, waste disposal, and environmental monitoring over the mine's operational life starting October 1998. The plan addresses air quality, wildlife management, aquatic life protection, waste management, reclamation, and compliance with Canadian and Northwest Territories environmental regulations and the Environmental Agreement.
Development Plans Environmental Agreement Air Quality
Operating Environmental Management Plan, Ekati Diamond Mine (BHP Billiton, April 1998)
1 April 1998Report
BHP Diamonds Inc.'s Operating Environmental Management Plan for the Ekati Diamond Mine in the Northwest Territories outlines comprehensive environmental protection and management strategies for the operational phase of the mine, covering air quality, water management, wildlife protection, waste management, reclamation, and monitoring programs aligned with regulatory requirements and the Environmental Agreement with Canadian and territorial governments.
Development Plans Air Quality Waste Rock
Operating Environmental Management Plan Support Documents Volume I (BHP Billiton, April 1998)
1998Report
EKATI Diamond Mine Operating Environmental Management Plan (OEMP) Support Documents Volume I (April 1998, Copy 17, BHP Diamonds Inc., Yellowknife). Contains Support Documents A through F (Environmental Awareness Training Plan, etc.) plus the Spill Contingency Plan with material-response data for Sodium Bicarbonate (on-land, on-water, storage/transfer, disposal), N-7 Emulsifier (Sorbitan Monooleate — appearance amber viscous, fatty-acid odour, insoluble), and Appendix F Tractor Trailer Pre-Trip Inspection (parking brake / engine / oil pressure / warning lights / air pressure / tires / lights / reflectors / front-tractor headlamps / clearance lights / flashers).
Development Plans Air Quality Regulatory Monitoring Waste Rock Wastewater

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472 documents · Page 17 of 24