Water Quality

Chemical, physical, microbiological water properties, water-licence criteria

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Project Description, Proposed Development of Sable, Pigeon & Beartooth Kimberlite Pipes, Ekati Diamond Mine (BHP Billiton, February 1999)
1 February 1999Regulatory Filing
BHP Diamonds Inc. proposes development of three additional kimberlite pipes (Beartooth, Pigeon, and Sable) at the Ekati Diamond Mine in the Northwest Territories, utilizing open pit mining methods and existing site infrastructure. The document details mining methods, waste rock and water management strategies, environmental impacts and mitigation measures, and reclamation plans including post-closure pit lake development for fisheries habitat replacement.
Development Plans Waste Rock Fish Habitat Wildlife
Environmental Agreement Annual Report, EKATI Diamond Mine (BHP Billiton, 1998)
1 February 1999Report
BHP Diamonds Inc.'s 1998 Environmental Annual Report documents the first year of full diamond mining operations at the Ekati Diamond Mine in the Northwest Territories, detailing environmental management practices, monitoring programs, and operational sustainability across water, air, wildlife, and land resources.
Development Plans Monitoring Water Quality
Kodiak Lake Management Plan, Modeling Component, Ekati Diamond Mine (BHP Billiton, January 1999)
4 January 1999Report
This report presents a water quality modeling study of Kodiak Lake at the Ekati Diamond Mine using the WASP/EUTRO model to assess the lake's assimilative capacity for treated sewage effluent and determine maximum allowable loads of BOD, ammonia, and phosphorous while maintaining adequate dissolved oxygen levels for fish health. The study includes calibration scenarios based on 1997-1998 monitoring data, baseline predevelopment conditions, and predictive modeling to establish loading limits under both open-water and ice-covered seasons.
Water Quality Monitoring Wastewater Regulatory
Review of Cover Design Technologies for the Reclamation of Tailings (G. Ward Wilson, University of Saskatchewan, 1999)
~1999Report
Approximate date — inferred from filename
This technical paper reviews cover design technologies for tailings reclamation across four distinct climate regimes (arid, temperate, high rainfall, and tropical monsoon) using numerical soil-atmosphere modeling. The analysis demonstrates that no single cover system design is universally applicable and that climate parameters, soil properties, and site-specific conditions must be integrated to achieve effective tailings containment and oxidation prevention.
Closure & Reclamation Waste Rock Acid Rock Drainage Kimberlite Tailings
Aquatic Effects Monitoring Program (AEMP) Overview Report, Draft, Ekati Diamond Mine (BHP Billiton, January 1999)
~1999Report
Approximate date — inferred from filename
This is the 1998 Aquatic Effects Monitoring Program (AEMP) Overview Report for the Ekati Diamond Mine, documenting the first year of post-baseline aquatic monitoring. The report presents results from Tier 1 Core monitoring of lakes and streams and Tier 2 Special Effects monitoring, concluding that while overall water and sediment quality remained good with no major adverse effects, some nutrient enrichment was detected downstream of mine construction activities, particularly elevated nitrate in lakes affected by Long Lake dam construction and blasting operations.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
BHP Diamonds Facts, Issue 3 (BHP Billiton, 1999)
~1999Report
Approximate date — inferred from filename
This corporate fact sheet describes the Ekati Diamond Mine in the Northwest Territories, Canada—a joint venture operated by BHP Diamonds Inc. that represents Canada's first diamond mine. The document provides comprehensive details on the mine's location, geology, infrastructure, operations, environmental management, and workforce.
Development Plans Exploration Regulatory Waste Rock Water Quality
Land Use Permit and Water Licence Inspection Reports, Ekati Diamond Mine, January 1999 to July 2001 (DIAND, 1999 to 2001)
1999–2001Report
Land Use Permit and Water Licence Inspection Reports binder January 1999 – July 2001, compiled by the Independent Environmental Monitoring Agency from INAC inspectors (Yellowknife Airport) for BHP Diamonds Inc. under Water Licence N7L2-1616. Includes photographic documentation of: snow-cleared diversion channel near the Misery road and Canyon area survey stakes, Misery Lake dewatering operations (three pumps, two CATERPILLAR generators GEA3517 / CAT POWER 225 with double-walled fuel tank, discharge flowing along natural drainage toward Lac de Gras), Coarse kimberlite rejects dumps west of the plant site within the waste-rock-dump footprint, Panda waste rock dump north of Panda pit and Koala sump, and frozen seepage from Coarse Kimberlite Rejects stockpiles.
Water Quality Regulatory Water Licence Wastewater
Aquatic Effects Monitoring Program (AEMP) Overview Report, Draft, Ekati Diamond Mine (BHP Billiton, January 1999)
1 January 1999Report
This is the 1998 Aquatic Effects Monitoring Program (AEMP) Overview Report for the Ekati Diamond Mine, documenting the first year of post-baseline aquatic monitoring. The report presents results from Tier 1 Core monitoring and Tier 2 Special Effects monitoring programs, concluding that overall there were no major adverse effects on water quality, sediment quality, or aquatic organisms in 1998, though some nutrient-related effects were observed downstream of construction activities.
Aquatic Effects Monitoring (AEMP)Aquatics Water Quality
Guidelines, Section 6: Environmental Assessment (MVEIRB, 1999)
~1999Report
Approximate date — inferred from filename
This document outlines the environmental assessment process under the Mackenzie Valley Resource Management Act, including the role and composition of the Review Board, procedures for determining when assessments are required, scoping, public consultation, and decision-making authority for proposed developments in the Mackenzie Valley.
Regulatory Development Plans Environmental Agreement Water Quality Wildlife
Aquatic Toxicity Associated with Diamond Ore (Kimberlite) Mining (Enviro-Test Laboratories, December 1998)
9 December 1998Report
This comprehensive toxicity study examines the aquatic effects of kimberlite ore from BHP Diamonds Inc.'s diamond mining operations in the Northwest Territories. The study includes acute and chronic toxicity testing on multiple species, toxicity identification evaluation, and 30-day fish exposure experiments assessing sublethal effects, concluding that the water licence limit of 25 mg/L kimberlite discharge is adequate for environmental protection.
Aquatics Aquatic Effects Monitoring (AEMP)Water Quality
Larry Lake and Leslie Lake Reconnaissance Surveys, Ekati Diamond Mine (BHP Billiton, December 1998)
1 December 1998Report
Rescan Environmental Services conducted reconnaissance surveys of Larry Lake and Leslie Lake on September 1, 1998 to assess potential impacts from mine effluents and operations. Larry Lake showed evidence of nutrient enrichment with elevated phytoplankton biomass, while Leslie Lake remained largely pristine except for elevated nitrate concentrations from dam construction activities.
Aquatics Water Quality Monitoring Benthic Invertebrates Wastewater
Aquatic Effects Monitoring Program (AEMP) Technical Report Appendices, Volume I, Ekati Diamond Mine (BHP Billiton, December 1998)
1 December 1998Report
The 1998 Aquatic Effects Monitoring Program (AEMP) technical report appendices document environmental sampling locations across multiple lakes and streams near the Ekati Diamond Mine, including detailed meteorological data, stream flow measurements, and water quality monitoring parameters collected throughout the year.
Aquatic Effects Monitoring (AEMP)Aquatics Monitoring
BHP Corporate Environmental Report 1998 (BHP Billiton, 1998)
1 December 1998Report
BHP's 1998 Environmental Report details the company's environmental performance and management across its global operations in minerals, petroleum, and steel, with a focus on compliance with regulations, reduction of emissions and waste, and case studies of specific environmental initiatives such as fish protection at Ekati diamond mine and ecosystem preservation in the Timor Sea.
Air Quality Greenhouse Gas Waste Rock Monitoring
Overview of the Hydrology and Water Quality of the Coppermine River (Coulombe-Pontbriand, Reid & Jackson, December 1998)
1 December 1998Report
This comprehensive hydrological and water quality overview of the Coppermine River basin presents mean annual discharge data, seasonal flow patterns, and flood frequency analyses from multiple gauging stations, along with water quality monitoring results comparing measured parameters to Canadian guidelines. The report evaluates the potential effects of Ekati diamond mine de-watering operations on natural river flows and regional hydrological characteristics.
Water Quality Monitoring Aquatics Regulatory
Environmental Baseline Assessment, Gazelle Lake, Ekati Diamond Mine (BHP Billiton, December 1998)
1 December 1998Report
An environmental baseline study of Gazelle Lake conducted in August 1998 to document aquatic resources prior to bulk sampling of a kimberlite pipe. The study assessed bathymetry, hydrology, water quality, sediment quality, and aquatic communities including fish species and habitats.
Aquatics Aquatic Effects Monitoring (AEMP)Fish Habitat
Environmental Management Procedures Manual, Supporting Document B, Ekati Diamond Mine (BHP Billiton, December 1998)
1 December 1998Report
BHP Diamonds Inc.'s Environmental Management Procedures Manual for the Ekati Diamond Mine establishes comprehensive operating procedures to minimize environmental impacts across air quality, water, wildlife, waste, traffic, and archaeological resource management. The manual outlines reporting mechanisms, mitigation strategies, and operational guidelines for all site personnel, contractors, and visitors.
Development Plans Wildlife Air Quality
Environmental Baseline Assessment, Point Lake, Ekati Diamond Mine (BHP Billiton, December 1998)
1 December 1998Report
Environmental baseline study of Point Lake conducted in August 1998 to document aquatic resources and provide baseline environmental information for potential bulk sampling of a diamondiferous kimberlite deposit beneath the lake. The study assessed bathymetry, water quality, sediment chemistry, and aquatic communities (phytoplankton, zooplankton, benthic invertebrates, and fish), concluding that Point Lake is a very unproductive oligotrophic lake with low densities of lake trout and sculpins.
Aquatics Water Quality Aquatic Effects Monitoring (AEMP)
Panda-Kodiak Channel Research Project Progress Report (University of Alberta, December 1998)
~1998Report
Approximate date — inferred from filename
This 1998 progress report documents the inaugural year of the University of Alberta's research project assessing the effectiveness of the Panda-Kodiak Diversion Channel as fish habitat, established as compensation for loss of surface water connectivity in the Koala Watershed due to mine development. The project combines baseline surveys of the constructed channel and natural reference streams using habitat mapping, fish community assessments, benthic sampling, and hydrodynamic analyses to understand how created habitats support productive fish populations in the tundra environment.
Fish Habitat Aquatic Effects Monitoring (AEMP)Benthic Invertebrates Development Plans
Submission on the Proposed Voisey's Bay Mining Development, Environmental Management (Labrador Inuit Association, November 1998)
4 November 1998Regulatory Filing
The Labrador Inuit Association (LIA) submits a comprehensive proposal for ongoing environmental management of the proposed Voisey's Bay mining development, centered on establishing a legally binding Environmental Agreement between the four parties to the Memorandum of Understanding (Canada, Newfoundland, LIA, and Innu Nation) plus the mining company. The submission outlines the need for a multi-stakeholder Environmental Agreement Agency, a Monitoring Partnership involving VBNC, LIA, and Innu Nation, coordination with a Marine Management Plan under the Oceans Act, and a Shipping Agreement to address Inuit concerns about ice shipping, emphasizing that these arrangements are essential conditions for any environmental approval and meaningful Aboriginal participation in long-term Project management.
Environmental Agreement Traditional Knowledge Monitoring Water Quality Wildlife
Waste Rock Storage Area Seepage Survey, Ekati Diamond Mine (BHP Billiton, November 1998)
1 November 1998Report
This 1998 waste rock storage area seepage survey documents monitoring of five seepage stations (SEEP001-98 through SEEP005-98) at the Ekati Diamond Mine, conducted in accordance with Water License N7L2-1616 requirements. The report presents field measurements and laboratory analysis of seepage quality from granitic waste rock and till dumps, with key findings showing elevated ammonia and aluminum concentrations at some stations, and recommendations for continued monitoring and improved quality assurance procedures in 1999.
Waste Rock Geochemistry Water Quality

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