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472 documents · Page 22 of 24

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Baseline Information on Permafrost, EIS Additional Information Section 8 (BHP Billiton, 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document responds to a regulatory panel request for baseline information on permafrost conditions at the BHP Diamonds (Ekati) project. It describes existing permafrost data collected since 1993 through boreholes, thermistor cables, and ground-penetrating radar surveys, confirms permafrost thickness of 230–280 m, identifies future geotechnical investigation needs for secondary structures, and documents minor thermally induced ground instability encountered during exploration and construction.
Monitoring Development Plans Regulatory Closure & Reclamation
A Preliminary Evaluation of the Lethal and Sub-lethal Toxicities to Fish of Effluents from Diamond Exploration in the Lac de Gras Area (DFO, November 1995)
7 November 1995Report
This independent toxicity assessment evaluates the lethal and sub-lethal effects of kimberlite effluents from diamond exploration activities in the Lac de Gras region on freshwater fish species (lake whitefish, lake trout, and rainbow trout), and identifies toxic components including high pH, suspended solids, and various metals such as aluminum, iron, and nickel.
Aquatics Water Quality Fish Habitat
Review Comments on BHP's Environmental Impact Statement (EIS) (Health Canada, October 23, 1995)
23 October 1995Regulatory Filing
Health Canada's review of BHP's Environmental Impact Statement for a diamond mining project, providing comments on conformity with EIS guidelines and identifying deficiencies regarding radiological hazards, particularly radon gas exposure and the need for baseline radioactivity monitoring in ore and environmental compartments.
Development Plans Air Quality Monitoring Waste Rock
Conformity Report on the NWT Diamonds Project Environmental Impact Statement (GNWT, October 1995)
23 October 1995Regulatory Filing
The Government of the Northwest Territories submitted a conformity report evaluating BHP's Environmental Impact Statement for the NWT Diamonds Project against the May 1995 EIS Guidelines, identifying major and minor deficiencies including inadequate treatment of traditional knowledge, incomplete environmental management plans, spatial boundary limitations, knowledge gaps in wildlife ecology and waste management, and insufficient detail on monitoring programs and mitigative measures.
Development Plans Regulatory Traditional Knowledge Waste Rock
Technical Evaluation of the BHP NWT Diamond Project Environmental Impact Statement (Environment Canada, October 1995)
23 October 1995Regulatory Filing
Environment Canada provides a detailed technical evaluation of BHP's Environmental Impact Statement for the proposed diamond mine at Lac de Gras, identifying significant deficiencies in environmental assessment and recommending extensive supplemental information and monitoring programs across hydrology, air quality, waste management, and wildlife protection.
Development Plans Regulatory Waste Rock
Conformity and Quality Analysis of BHP Diamonds Inc.'s Environmental Impact Statement, NWT Diamonds Project (DIAND, October 1995)
23 October 1995Regulatory Filing
DIAND's Conformity and Quality Analysis of BHP Diamonds Inc.'s Environmental Impact Statement for the proposed NWT Diamonds Project, submitted July 23, 1995. The analysis concludes that while the EIS substantially addresses guideline requirements, there are significant deficiencies in six main areas: terrain and permafrost characterization, waste management, water management, traditional knowledge integration, monitoring programs, and cumulative effects assessment.
Development Plans Regulatory Traditional Knowledge
Conformity Analysis & Technical Review of the BHP Environmental Impact Statement (DFO, October 1995)
20 October 1995Regulatory Filing
The Department of Fisheries and Oceans provides a conformity analysis and technical review of the Environmental Impact Statement for BHP Diamonds Inc.'s proposed NWT Diamonds Project in the Lac de Gras area. DFO identifies multiple deficiencies in baseline data, fish habitat assessment, and mitigation planning while concluding that public hearings can proceed, noting that 1995 field studies will address many information gaps.
Aquatics Fish Habitat Development Plans
Conformity Analysis and Technical Review of the Environmental Impact Statement for the Proposed BHP Diamonds Inc. NWT Diamonds Project (DFO, October 1995)
20 October 1995Regulatory Filing
The Department of Fisheries and Oceans provides a conformity analysis and technical review of BHP Diamonds Inc.'s Environmental Impact Statement for the proposed NWT Diamonds Project in the Lac de Gras area, identifying multiple deficiencies in baseline data, habitat assessment, and mitigation planning while recommending that public hearings may proceed pending resolution of the identified issues.
Aquatics Fish Habitat Development Plans
Conformity Review of the Environmental Impact Statement, NWT Diamonds Project (Natural Resources Canada, October 1995)
19 October 1995Regulatory Filing
Natural Resources Canada's conformity review of BHP Diamonds Inc.'s Environmental Impact Statement for the proposed NWT Diamonds Project, identifying deficiencies primarily related to permafrost and ground ice effects on mine design, tailings stability, reclamation feasibility, and economic impact analysis. The review concludes the EIS is partially conforming and sufficient to proceed to hearings despite identified minor deficiencies.
Development Plans Regulatory Waste Rock
Conformity Review of the BHP NWT Diamonds Project Environmental Impact Statement (Natural Resources Canada, October 1995)
19 October 1995Regulatory Filing
Natural Resources Canada's conformity review of the Environmental Impact Statement for BHP Diamonds Inc.'s NWT Diamonds Project identifies partial conformity to guidelines, with deficiencies primarily related to permafrost and ground ice effects on tailings stability, reclamation feasibility, and long-term environmental impacts. The review concludes the EIS is sufficient to proceed to hearings but recommends addressing gaps in understanding of permafrost behavior, availability of reclamation materials, contingency planning, and monitoring protocols.
Development Plans Closure & Reclamation Waste Rock
Comments on BHP Environmental Impact Statement (Parlee McLaws (o/b/o City of Yellowknife), October 1995)
17 October 1995Letter
The City of Yellowknife submits comments on the BHP Environmental Impact Statement regarding the proposed diamond mine project, expressing concerns about incomplete analyses of population growth, employment patterns, infrastructure capacity, social services impacts, and closure planning. The letter identifies gaps in the EIS regarding worker accommodation, drug and alcohol problems, waste handling, and the lack of benefit analysis for northern communities.
Development Plans Correspondence Regulatory Closure & Reclamation Waste Rock
Comments on BHP Environmental Impact Statement (Parlee McLaws (for City of Yellowknife), October 1995)
17 October 1995Letter
City of Yellowknife provides comments on the BHP Environmental Impact Statement for the proposed Ekati Diamond Mine, identifying concerns about labour patterns, population growth analysis, accommodation capacity, closure impacts, and socioeconomic effects on the city during construction, operations, and post-closure phases.
Development Plans Correspondence Regulatory Closure & Reclamation Waste Rock
Geotechnical Properties of New Fox and Panda Tailings Report, Appendix A (University of Alberta, October 1995)
12 October 1995Report
This geotechnical report characterizes the properties of New Fox and Panda kimberlite tailings from a proposed diamond mine in the Northwest Territories, including solids content, grain size distribution, consolidation behavior, hydraulic conductivity, and filtration performance. The study concludes that New Fox tailings are more problematic for disposal than Panda tailings due to finer particle sizes, lower water release rates, and higher turbidity potential.
Waste Rock Kimberlite Tailings Geochemistry Water Quality
Conformity and Quality Analysis, BHP Diamonds Inc. Environmental Impact Statement, NWT Diamonds Project (DIAND, October 1995)
1 October 1995Regulatory Filing
DIAND's conformity and quality analysis of BHP Diamonds Inc.'s Environmental Impact Statement for the proposed NWT Diamonds Project, submitted July 1995, concluding that while the EIS substantially addresses guideline information requirements, significant deficiencies exist in terrain and permafrost characterization, waste management planning, water management rationale, traditional knowledge integration, monitoring programs (particularly post-closure), and cumulative effects assessment.
Development Plans Regulatory Monitoring
Corporate Experience Related to Spills & Accidents, EIS Additional Information (BHP Billiton, August 1995)
19 August 1995Regulatory Filing
BHP responds to a Panel request regarding corporate experience with spills and accidents, documenting ten unauthorized discharges at the Koala site from October 1993 to April 1995, including detailed descriptions of causes, response actions, environmental monitoring results, and long-term mitigative measures at Phase I and II tailings impoundments and Fox minewater settling pond facilities.
Wastewater Regulatory Water Quality Development Plans
Mining Exploration and Development Questionnaire for Water Licence Applications (NWT Water Board, August 1995)
1 August 1995Unknown / Unclassified
The Northwest Territories Water Board issued this mining exploration and development questionnaire in August 1995 to solicit supplemental information from applicants for water licence applications or renewals. The questionnaire covers geological characteristics, exploration operations, milling processes, containment areas, water treatment, environmental monitoring, and environmental assessment requirements under the Canadian Environmental Assessment Act.
Regulatory Water Licence Development Plans
Spatial Distribution of Snow Chemical Load at the Tundra Taiga Transition (Pomeroy & Marsh, July 1995)
1 July 1995Report
This paper examines spatial variation in snow chemical composition and accumulation along a 200-km transect spanning the tundra-taiga transition near Inuvik, Northwest Territories. The study shows that ion loads vary up to 18-fold between mesoscale sites and demonstrate that both local landscape factors (vegetation roughness) and broad-scale influences (blowing snow, proximity to ocean) must be considered to predict snow quantity and chemistry in windswept Arctic environments.
Water Quality Monitoring Air Quality Waste Rock
Effects of Diamond Mining Activities on Riparian and Terrestrial Ecosystems (IEMA, June 1995)
~1995Report
Approximate date — inferred from filename
This chapter examines the physical, chemical, and biological effects of diamond mining activities on riparian and terrestrial ecosystems, documenting impacts from exploration, construction, operation, and reclamation stages at diamond mines, with case studies from operations in Australia, Botswana, South Africa, Russia, and Guinea, and discussion of potential effects on northern Canadian ecosystems including permafrost, esker habitats, and wildlife migration corridors.
Wildlife Habitat Assessment Caribou
Questionnaire for Key Contacts, Review of the Environmental Effects of Diamond Mining (Environment Canada, 1995)
~1995Unknown / Unclassified
Approximate date — inferred from filename
A structured questionnaire commissioned by Environment Canada to collect information from diamond mining industry key contacts about environmental effects of diamond mining activities, covering exploration, mining operations, water use, waste management, tailings, open pits, and mine reclamation to support decision-making in northern Canada.
Development Plans Monitoring Exploration
Effects of Diamond Mining Activities on Aquatic Ecosystems, Chapter 4 — A Review of the Environmental Effects of Diamond Mining (1995)
~1995Report
Approximate date — inferred from filename
This technical report reviews the environmental effects of diamond mining activities on aquatic ecosystems globally, with particular focus on the Northwest Territories. It examines the mineralogy of kimberlites, physical and chemical effects during exploration, construction, operation, and reclamation phases, and discusses biological impacts on aquatic organisms including effects of sediment, water quality degradation, habitat destruction, and streamflow alterations.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality

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472 documents · Page 22 of 24