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827 documents · Page 32 of 42

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Fish Habitat Management Plan, EIS Additional Information Response (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
BHP Diamonds Inc. responds to a Panel request regarding fish habitat management and compensation for the Ekati project by detailing negotiations with the Department of Fisheries and Oceans on habitat loss from lake dewatering and tailings/waste rock disposal, including multiple reports quantifying spawning habitat in affected lakes and compensation approaches based on reproductive habitat and whole lake replacement values.
Fish Habitat Aquatics Development Plans
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
Assessment of Impact Significance Methodology, NWT Diamonds Project EIS (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document is a response to panel questions regarding the assessment methodology for impact significance in the NWT Diamonds Project Environmental Impact Statement. It explains how six impact attributes (geographic extent, duration/frequency, reversibility, ecological/social context, probability, and future resource capacity) were integrated into a two-dimensional significance matrix based primarily on spatial and temporal criteria to classify residual environmental effects as major, moderate, minor, or negligible.
Development Plans Wildlife Caribou Air Quality
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
Significance of the Land-Based Economy, EIS Additional Information Section 10 (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document provides additional information on the significance of the land-based economy and traditional food harvesting in the Northwest Territories, responding to panel requests for baseline data on country food's cultural, nutritional, and economic importance to Aboriginal households in the context of the NWT Diamonds Project.
Traditional Knowledge Caribou Development Plans Community-Based Monitoring Métis Yellowknives Dene
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
Meteorology, Hydrology and Water Quality Baseline Study Update, NWT Diamonds Project (BHP Billiton, December 1995)
1 December 1995Report
BHP Diamonds Inc. submitted a 1995 baseline environmental study update documenting meteorology, hydrology, and water quality monitoring in the NWT Diamonds Project area. The report presents data from three weather stations showing 40% higher precipitation than 1994, 14 hydrometric stations monitoring stream and lake hydrology with peak flows approaching 1-in-100 year flood event levels, and water quality analysis from 11 sites indicating localized effects in Kodiak Lake from Panda Lake Diversion Channel construction while Slipper Lake outlet water quality remained unchanged.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality Development Plans
Archaeological Investigations for BHP Diamonds Inc., Lac de Gras Area (Points West Heritage Consulting, November 1995)
21 November 1995Report
Points West Heritage Consulting conducted archaeological investigations in the Lac de Gras area on behalf of BHP Diamonds Inc. under NWT Archaeologist's permit 95-813, discovering 12 new archaeological sites and conducting mitigation work at previously recorded sites. The work assessed proposed development roads, quarry locations, and a mine site at Misery Lake, recommending avoidance of sites where feasible and systematic data collection where development cannot be avoided.
Traditional Knowledge Development Plans Yellowknives Dene
Archaeological Investigations for BHP Diamonds Inc. (Points West Heritage, November 1995)
21 November 1995Report
Archaeological investigations conducted for BHP Diamonds Inc. in the Lac de Gras area resulted in the discovery of 12 new archaeological sites and mitigation of 4 previously recorded sites. The work was conducted under NWT Archaeologist's permit 95-813 and included inventory and impact assessment of proposed development areas including a road to Misery Lake and associated quarries.
Exploration Traditional Knowledge Yellowknives Dene
Draft Procedures for Public Hearings, Comments (GNWT, November 1995)
21 November 1995Letter
The Government of the Northwest Territories submits comments on the BHP Diamonds Mine Environmental Assessment Panel's draft procedures for public hearings, requesting clarification on Yellowknife hearing arrangements, technical session participation, pre-hearing notice periods, questioning time limits, and suggestions for policy sessions and wrap-up sessions.
Regulatory Correspondence Development Plans Environmental Agreement
Comments on the Draft Procedures for Public Hearings, BHP Diamond Mine Environmental Assessment (BHP Billiton, November 1995)
20 November 1995Letter
BHP Diamonds Inc. expresses support for the Draft Procedures for Public Hearings for the BHP Diamond Mine Environmental Assessment and requests opportunity for the Proponent to respond to questions and present alternative viewpoints during proceedings.
Correspondence Development Plans Regulatory
Comments on the Draft Procedures for Public Hearings (Environment Canada, November 1995)
20 November 1995Letter
Environment Canada approves the Draft Procedures for Public Hearings issued by the BHP Diamond Mine Environmental Assessment Panel and requests that technical session subject areas be identified and shared with intervenors promptly.
Correspondence Regulatory Development Plans
Response to the Draft Procedures for Public Hearings (Dene Nation, November 1995)
20 November 1995Letter
The Dene Nation responds to draft procedures for public hearings on the proposed BHP diamond mine, requesting modifications to ensure full Dene participation, community involvement, adequate time for presentations and translation, and access to technical experts in the EARP review process.
Correspondence Traditional Knowledge Yellowknives Dene
Comments on Draft Procedures for Public Hearings, BHP Diamond Mine (NWT Chamber of Mines, November 1995)
20 November 1995Letter
The NWT Chamber of Mines expresses agreement with draft procedures for public hearings on the BHP Diamond Mine project, confirming they align with the Environmental Assessment and Review Process Guidelines Order and the Panel's Terms of Reference.
Correspondence Development Plans Regulatory
Comments on the Draft Procedures for Public Hearings (Natural Resources Canada, November 1995)
14 November 1995Letter
Natural Resources Canada expresses agreement with the Draft Procedures for Public Hearings issued by the BHP Diamond Mine Environmental Assessment Panel, supporting the decision to not permit cross-examination.
Correspondence Regulatory Development Plans
Comments on the Draft Procedures for Public Hearings (NWT Federation of Labour, November 1995)
10 November 1995Letter
The Northwest Territories Federation of Labour submits a letter to the BHP Diamond Mine Environmental Assessment Panel Chair criticizing draft hearing procedures as inadequate, specifically objecting to the 15-minute time limit for presentations, the non-transparent participant ordering process, and the denial of cross-examination rights for the proponent.
Correspondence Development Plans Regulatory
Comments on the Draft Procedures for Public Hearings, BHP Diamond Mine Environmental Assessment (DIAND, November 1995)
10 November 1995Letter
DIAND provides comments on the draft procedures for public hearings for the BHP Diamond Mine Environmental Assessment Panel, expressing general support while recommending improvements to accommodate third-party responses, question periods, and clarification between general and technical sessions.
Correspondence Development Plans Regulatory
Archaeological Investigations for BHP Diamonds Inc. (Points West Heritage Consulting, November 1995)
1995Report
1995 Archaeological Investigations for BHP Diamonds Inc. (Northwest Territories Archaeologist's permit 95-813) by Points West Heritage Consulting Ltd. for the Federal Environmental Assessment Panel of the BHP Diamonds Inc. NWT Diamonds Project, Yellowknife. Covers archaeological site survey of proposed quarry, mitigation recommendations, sites LdNs-1, LdNs-2, LdNs-3, LdNs-4 (lithic scatters near Pointe de Misère, Lac du Sauvage esker) with descriptions of unifaces and surface finds on lake/creek terraces.
Development Plans Traditional Knowledge Yellowknives Dene Regulatory

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827 documents · Page 32 of 42