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472 documents · Page 21 of 24

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Various Lake Studies, Ekati Diamond Mine: Beartooth Lake, King Pond, Long Lake and Lac de Gras (BHP Billiton, 1996 to 2001)
1996–2001Report
Various Lake Studies binder (Beartooth Lake, King Pond, and others) for the Ekati Diamond Mine. Tab 1 Beartooth Lake includes BHP 2000 Panda Waste Rock Storage Area Beartooth-Bearclaw drainage Seepage and Waste Rock survey reports (February 15 2001 to MVLWB), King Pond fish-habitat compensation plan information requests (Pete Cott DFO, Red Pedersen Agency, September 13-20 2000), King Pond Rescan 1999 fish-community survey using fifteen index gill-net sets over 22.08 hours (late August 1999 — Application of the Fisheries Act to King Pond on sustainable-fishery criteria), and detailed field water chemistry (pH, temperature °C, conductivity µS/cm, Total Phosphorus mg/L) measurements.
Aquatics Fish Habitat Waste Rock
Eskay Creek Mine Acid Rock Drainage (ARD) Case Study (Homestake Canada, 1999)
~1996–2001Report
Case study examining the Eskay Creek gold, silver, and base metal mine's waste management strategies, focusing on acid-generating rock (PAG) disposal options and the selection of underwater disposal in Albino Lake and Big Tom Lake as the optimal mitigation strategy to prevent acid rock drainage and protect receiving environments. The document includes monitoring data for contaminants including antimony, zinc, and total suspended solids from 1994-2000.
Waste Rock Acid Rock Drainage Closure & Reclamation
Environmental Fact Sheet, Equity Division (Placer Dome Canada, 1996)
~1996–2001Report
An environmental fact sheet for the Equity Division (Placer Dome Canada) minesite in central British Columbia, documenting mining operations, geology, waste management systems, acid rock drainage treatment, monitoring programs, and reclamation efforts including waste dump cover design and research.
Waste Rock Acid Rock Drainage Closure & Reclamation
NWT Diamonds Project Environmental Impact Statement, Additional Information Response Part C (BHP Billiton, January 1996)
1 January 1996Regulatory Filing
BHP's Additional Information Response to Part C of the NWT Diamonds Project Environmental Impact Statement addresses 17 panel questions and information gaps identified during the EIS review, covering spillway functions, water flow patterns, wildlife management, off-road vehicle policies, employment and socio-economic impacts, chemical effects of flocculants and ferrosilicon, and various technical clarifications on mine operations and closure.
Development Plans Water Quality Closure & Reclamation Waste Rock
Material Characterization: Will the Material Produce Significant Metal Leaching? (BHP Billiton, unknown)
~1996–2001Presentation
A lecture on material characterization for predicting metal leaching and acid rock drainage from mine waste, covering elemental composition analysis, weathering processes, dissolution and solubility controls, drainage chemistry prediction methods, and monitoring approaches for assessing environmental impacts of mining materials.
Waste Rock Acid Rock Drainage Geochemistry
Mineral Geochemistry Reference Tables for Acid Rock Drainage Prediction, Minesite Drainage (BHP Billiton, 1996)
~1996–2001Report
This technical document presents comprehensive geochemical data on mineral composition, acid-neutralization capacity, and pH behavior relevant to minesite drainage prediction, including tables of sulfide and carbonate minerals, dissolution rates, and relationships between neutralization potential and paste pH in waste rock samples.
Waste Rock Geochemistry Acid Rock Drainage
Special Program Participation List (Northwest Community College, 1996)
~1996–2001Unknown / Unclassified
A participation list for a Northwest Community College special program course with enrolled individuals from various mining companies, government agencies, and organizations across western Canada.
Uncategorized / needs review Waste Rock
Samatosum Mine Acid Rock Drainage Case Study (BHP Billiton, 1996)
~1996–2001Report
A case study examining drainage treatment and mitigation strategies at the Samatosum mine, detailing measures to limit leaching from waste rock dumps and tailings, including costs and long-term monitoring requirements for managing acid rock drainage and sludge disposal.
Waste Rock Acid Rock Drainage Geochemistry Monitoring Closure & Reclamation
Tailings Management Plan, NWT Diamonds Project (EBA Engineering, December 1995)
15 December 1995Report
This tailings management plan for the BHP Diamonds Project describes the design and operation of a 133-million-tonne tailings disposal system using Long Lake basin in the Northwest Territories, including perimeter dams, intermediate dykes, water management strategies, and long-term reclamation to restore the site to a wetland environment.
Waste Rock Kimberlite Tailings Closure & Reclamation
Air Quality Monitoring Program Records, Ekati Diamond Mine (BHP Billiton, 1995 to 2005)
1 December 1995Regulatory Filing
This document is BHP Billiton's December 1995 response to the panel's request for additional information on monitoring programs for the NWT Diamonds Project (Ekati), detailing adaptive management criteria, thresholds, and monitoring sensitivity for water, land, air, wildlife, and socioeconomic parameters, along with establishing an independent Environmental Advisory Group. The second section (dated March 2004) presents Rescan Environmental Services' proposal to update the EKATI air dispersion model using ISC3, incorporating current meteorological data, terrain, emissions inventories, and cumulative effects assessment with the Diavik mine.
Development Plans Monitoring Water Quality Waste Rock
Alternatives to Accelerate Pit Water Infilling, EIS Additional Information Request 16 (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document provides BHP's response to a panel request for alternatives to accelerate water infilling of mined-out open pits at the Ekati Diamond Mine, discussing options such as waste rock backfilling, tailings deposition, and surface water diversion, along with their environmental and economic trade-offs for each pit.
Development Plans Closure & Reclamation Aquatics
Baseline Information on Ground Water, EIS Additional Information Response (Section 9, 806d) (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document responds to a panel's request for additional information on baseline ground water data and monitoring plans for the proposed BHP Diamond Mine at Lac de Gras. The proponent describes low predicted groundwater inflows based on permafrost presence and low hydraulic conductivity of granite bedrock, with plans for periodic monitoring of actual pit dewatering rates rather than a comprehensive regional monitoring program.
Water Quality Monitoring Development Plans Waste Rock Regulatory
Monitoring Programs (EIS Additional Information, Section 15) (BHP Billiton, 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document is the proponent's detailed response to regulatory panel requests for information on environmental and socioeconomic monitoring programs for the NWT Diamonds Project. It outlines comprehensive monitoring plans for water quality, wildlife, air, land, permafrost, and socioeconomic parameters; describes the establishment of an independent Environmental Advisory Group; and addresses post-closure monitoring commitments and adaptive management thresholds.
Monitoring Water Quality Development Plans
Waste Management Plans, Additional Information Response to Panel Information Request 603a, Ekati Diamond Mine (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document is a detailed response to a regulatory panel's information requests regarding waste management plans for the Ekati Diamond Mine, specifically addressing tailings management, water treatment facilities, nitrogen contamination from ANFO explosives, dam failure scenarios, and waste rock drainage control. The response includes engineering designs for a Long Lake tailings facility with sequential cells, water clarification methods tested during bulk sampling, contingency plans for dam failures, and management practices to minimize ammonia losses from explosive use.
Waste Rock Wastewater Water Quality Regulatory
Tailings Dams Preliminary Design Report, NWT Diamonds Project (EBA Engineering, December 1995)
1 December 1995Report
EBA Engineering Consultants prepared preliminary designs for tailings dams and associated earthworks at the NWT Diamonds Project located 300 km northeast of Yellowknife, featuring four perimeter dams around Long Lake using frozen core technology to retain water and tailings, with extensive thermal and stability analyses to ensure permafrost integrity over a 25-year operational period.
Development Plans Waste Rock Closure & Reclamation Monitoring
NWT Diamonds Project Environmental Impact Statement, Additional Information Response (BHP Billiton, December 1995)
1 December 1995Regulatory Filing
BHP's response to the Review Panel's requests for additional information regarding corporate structure, environmental management systems, and spills during NWT Diamonds Project exploration operations. The document details BHP Diamonds Inc.'s relationship to parent company BHP, Environmental Management System implementation, and documents ten unauthorized discharges that occurred during summer 1994 exploration activities at the Koala site.
Development Plans Environmental Agreement Regulatory Water Quality Waste Rock
NWT Diamonds Project Tailings Management Plan and Preliminary Design of Retention Structures (EBA Engineering, December 1995)
1 December 1995Report
This comprehensive tailings management plan prepared by EBA Engineering Consultants for BHP Diamonds describes the disposal strategy for 133 million tonnes of kimberlite tailings over 25 years of mine operation at the NWT Diamonds Project. The plan details the use of Long Lake basin for tailings storage in five sequential cells, with perimeter dams featuring permafrost cores, intermediate filter dykes, water clarification techniques, and progressive reclamation to restore the landscape to a stable, vegetated wetland environment.
Kimberlite Tailings Waste Rock Closure & Reclamation
Waste Rock Leaching 1995 Baseline Study Update, Predictions of Dissolved Concentrations in Waste Rock Drainage, NWT Diamonds Project (BHP Billiton, December 1995)
1 December 1995Report
This 1995 baseline study by BHP Diamonds Inc. predicts dissolved metal concentrations in waste rock drainage from the NWT Diamonds Project using static and kinetic geochemical tests. The study forecasts that most waste rock will generate neutral pH drainage, with small percentages capable of producing acidic or alkaline drainage, and provides maximum predicted concentrations for six metals (aluminum 0.2 mg/L, chromium 0.015 mg/L, copper 0.02 mg/L, lead 0.001 mg/L, nickel 0.02 mg/L, zinc 1 mg/L) at pH 8.0 equilibrium conditions.
Waste Rock Acid Rock Drainage Geochemistry
Baseline Information on Eskers, NWT Diamonds Project (BHP Billiton, December 1995)
~1995Report
Approximate date — inferred from filename
This technical report documents baseline information on eskers in the NWT Diamonds Project area, including their geologic features, physical effects of exploration activities, biological importance to wildlife (caribou, bears, wolves, foxes, birds, small mammals), and traditional archaeological and cultural significance to Dene and Inuit peoples. The report addresses quarrying plans for the Airstrip Esker and Lac du Sauvage Esker as sources of construction materials and analyzes potential impacts on wildlife corridors and carnivore denning habitats.
Exploration Development Plans Waste Rock Traditional Knowledge Monitoring
Sedimentation Ponds Preliminary Design, NWT Diamonds Project (EBA Engineering, December 1995)
~1995Report
Approximate date — inferred from filename
This preliminary design report documents the planned sedimentation pond systems for four kimberlite pit mines (Panda/Koala, Misery, Fox, and Leslie) at the NWT Diamonds Project. The ponds are designed to impound turbid water and soft lake sediments from pit dewatering and to provide settling basins during mine operation, with specific designs for valley ponds and lake basin ponds incorporating pervious dikes, impervious dams, and frozen core structures adapted to permafrost conditions.
Development Plans Wastewater Water Quality Regulatory

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472 documents · Page 21 of 24