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940 documents · Page 42 of 47

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Fisheries and Aquatic Life Baseline Study Update, Ekati Diamond Mine (BHP Billiton, December 1995)
1 December 1995Report
This 1995 baseline fisheries and aquatic life study documents environmental conditions in the Koala watershed near the proposed Ekati Diamond Mine, establishing baseline data for long-term monitoring of four designated lakes (Vulture, Kodiak, Nema, Slipper) and associated streams. The report presents results of sampling periphyton, larval drift, benthic invertebrates, zooplankton, and fisheries data collected to assess potential mining impacts on aquatic habitat and biota.
Aquatics Aquatic Effects Monitoring (AEMP)Benthic Invertebrates
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
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
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
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
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
Comments on the Conformity of BHP's Environmental Impact Statement with EARP Panel Guidelines (Dogrib Treaty 11 Council, October 1995)
25 October 1995Regulatory Filing
Dogrib Treaty 11 Council submits detailed comments on BHP's Environmental Impact Statement for the NWT Diamonds Project, identifying areas of non-compliance with EARP Panel Guidelines, particularly regarding inadequate incorporation of traditional knowledge, insufficient baseline data on wildlife and caribou, incomplete management plans, and superficial treatment of socio-economic impacts on Dogrib communities.
Traditional Knowledge Development Plans Wildlife
Comments on the Conformity of BHP's Environmental Impact Statement with the EARP Panel Guidelines, NWT Diamonds Project (Dogrib Treaty 11 Council, October 1995)
25 October 1995Report
The Dogrib Treaty 11 Council submits detailed comments on BHP's Environmental Impact Statement for the NWT Diamonds Project, identifying deficiencies in conformity with EARP Panel Guidelines, particularly regarding insufficient integration of traditional knowledge, inadequate wildlife and habitat baseline data, incomplete assessment of socio-economic impacts on Dogrib communities, and gaps in management plans for wildlife, fisheries, and emergency response.
Development Plans Traditional Knowledge Wildlife
Conformity Review of the BHP Diamond Mine Environmental Impact Statement (EIS) (Nunavut Tunngavik Inc., October 1995)
24 October 1995Regulatory Filing
Nunavut Tunngavik Inc. submits a detailed critique of BHP's Environmental Impact Statement for the proposed diamond mine at Lac de Gras, arguing the EIS is deficient in water quality analysis, post-closure monitoring plans, and consultation with Kitikmeot Inuit regarding land claims and compensation agreements under the Nunavut Land Claims Agreement.
Development Plans Water Quality Traditional Knowledge Wildlife
Submission to BHP Environmental Assessment Panel on Deficiencies of the BHP EIS with Reference to the Panel's Final Guidelines, EIS020 (Kitikmeot Inuit Association, October 1995)
23 October 1995Regulatory Filing
The Coronation Impact Review Committee submits a detailed critique of BHP's Environmental Impact Statement for the NWT Diamonds Project, identifying deficiencies in consultation with Inuit populations, inadequate monitoring programs for aquatic resources, and insufficient consideration of impacts to the Coppermine River and Lac de Gras. The submission includes a technical report by consultant Vince P. Palace recommending comprehensive pre-project baseline data collection and ongoing biomonitoring of fish populations, suspended particulates, inorganic and organic contaminants, and sediment throughout the mine's operating life.
Traditional Knowledge Aquatics Water Quality
Conformity Report, NWT Diamonds Project Environmental Impact Statement (GNWT, October 1995)
23 October 1995Regulatory Filing
The Government of the Northwest Territories' conformity review of the BHP NWT Diamonds Project Environmental Impact Statement, identifying major deficiencies in traditional knowledge integration, environmental management plans, spatial boundaries, wildlife assessment, socio-economic impacts, and monitoring programs, while concluding that the EIS can be brought into compliance relatively quickly through additional analysis and field work results.
Development Plans Regulatory Traditional Knowledge
Comments on Environmental Impact Statement (EIS), Ekati Diamond Mine (Health Canada, October 23, 1995)
23 October 1995Letter
Health Canada's review of BHP's Environmental Impact Statement for the Ekati Diamond Mine, identifying conformity with EIS guidelines but noting deficiencies in radiological risk assessment, particularly regarding radon gas exposure and incomplete baseline radioactivity data for ore and natural compartments.
Correspondence Development Plans Regulatory Air Quality Water Quality
Submission on Deficiencies of the BHP Environmental Impact Statement, NWT Diamonds Project (Coronation Impact Review Committee, October 1995)
23 October 1995Regulatory Filing
The Coronation Impact Review Committee submits a detailed critique of BHP's Environmental Impact Statement for the NWT Diamonds Project (Ekati Mine), identifying deficiencies in consultation with Inuit under the Nunavut Land Claim Agreement, inadequate monitoring programs for aquatic ecosystems, and insufficient consideration of impacts to Lac De Gras, the Coppermine River, and traditional Inuit harvesting. The submission includes a technical report by environmental consultant Vince P. Palace recommending comprehensive pre-project baseline data collection and enhanced biomonitoring throughout mine operations to detect potential disturbances to fish populations and water quality.
Development Plans Traditional Knowledge Aquatics
Conformity Comments on BHP Diamond Mine Environmental Impact Statement (Nunavut Tunngavik Incorporated, October 1995)
23 October 1995Report
Nunavut Tunngavik Inc. (NTI) submits conformity comments on the BHP Diamond Mine Environmental Impact Statement, asserting that the EIS is deficient in water quality analysis, long-term post-closure monitoring, and consultation with Kitikmeot Inuit regarding land claim rights and potential water impacts to the Coppermine River. NTI recommends the panel require BHP to answer supplemental questions and initiate compensation negotiations with the Kitikmeot Inuit Association before proceeding to public hearings.
Development Plans Correspondence Traditional Knowledge Closure & Reclamation Regulatory
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
Review Comments on the BHP Environmental Impact Statement (Health Canada, October 1995)
23 October 1995Letter
Health Canada reviews BHP's Environmental Impact Statement for the diamond mine project, finding human health information largely conforming to guidelines except for deficiencies regarding radon gas exposure risk assessment. The review requires the proponent to analyze ore and environmental samples for radioactive source terms and establish a radon gas monitoring program to ensure compliance with radiation regulations.
Development Plans Air Quality Monitoring Regulatory
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

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940 documents · Page 42 of 47