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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.
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.
This document presents conclusions and recommendations from a review of environmental effects of diamond mining on aquatic, riparian, and terrestrial ecosystems. It identifies significant potential effects from mining activities and recommends additional research, toxicity testing, environmental monitoring, and data collection from operating mines in northern climates to better understand and mitigate these impacts.
This technical chapter describes diamond mining activities worldwide, including exploration methods, ore extraction techniques (alluvial, open pit, and underground mining), mineral processing, tailings disposal, water and energy management, mine infrastructure requirements, and reclamation practices relevant to assessing environmental impacts of diamond mining operations.
BHP Diamonds Inc. submits an application package to the Canadian Coast Guard under the Navigable Waters Protection Act for the proposed NWT Diamonds Project, a 25-year diamond mining operation near Lac de Gras in the Northwest Territories. The application includes detailed technical summaries of all works affecting navigable waters, including water intake systems, diversion channels, lake dewatering procedures, tailings disposal in Long Lake with perimeter dams, discharge systems, and fisheries compensation measures.
A comprehensive technical presentation by BHP Diamonds Inc. and DIA MET Minerals Ltd. documenting baseline environmental conditions and predicted impacts of the NWT Diamonds Project on water resources, including hydrology, water quality, and aquatic biology in the Lac de Gras and Koala watershed areas.
BHP Minerals Canada Ltd. submitted a comprehensive project description report for the proposed NWT Diamonds Project, a large-scale diamond mining operation located 300 km northeast of Yellowknife in the Coppermine River basin. The report details mining plans for three kimberlite pipes (Koala, Fox, and Leslie), processing methods, infrastructure development, and environmental management strategies including tailings storage in Long Lake and mitigation measures for impacts on aquatic and terrestrial ecosystems.
This regulation establishes the Northwest Territories Waters Regulations, replacing the Northern Inland Waters Regulations, and sets out comprehensive licensing criteria, fees, and application procedures for water use and waste deposit across various undertaking types including industrial, mining, municipal, power, agricultural, conservation, and recreational activities.
The Northwest Territories Waters Act, assented to June 23, 1992, establishes the legal framework for managing water resources in the Northwest Territories, creating the Northwest Territories Water Board to issue water use and waste deposit licences and regulate water management through type A and type B licensing systems.
The Northwest Territories Water Board published guidelines for the discharge of treated municipal wastewater in the NWT, establishing effluent quality criteria and receiving water quality objectives to protect public health and environmental quality. The document specifies treatment requirements, monitoring protocols, and licensing procedures for municipal waste systems across different receiving environments including streams, rivers, lakes, estuaries, and marine waters.
The Northwest Territories Water Board's 1992 guidelines establish effluent quality standards and receiving water quality objectives for the discharge of treated municipal wastewater throughout the NWT, incorporating revised criteria based on empirical data and addressing summer/winter discharge differences, operational requirements, and site-specific considerations.
Abandonment & Restoration (Miscellaneous) Binder for the Ekati / Northwest Territories mining sector covering 1990-2006. Includes the January 2006 NWT Mine Site Reclamation Guidelines, "Best Environmental Management Practices for Mining in NWT" draft examples, BC Ministry of Water Land and Air Protection water-quality protection guidelines, and Island Copper Mine (BHP Minerals Canada, Vancouver) closure case study by Aspinall — covering social-aspect closure planning, worker retraining, salvage value treatment, dynamic closure scope.
Catalog describing three CD-ROMs containing over 150 MEND (Mine Environment Neutral Drainage) technical reports from 1989-2000, available for purchase from the MEND Secretariat in Ottawa. The reports cover acidic drainage prediction, treatment, monitoring, prevention, and control strategies developed through cooperative research with mining industry and government partners.
The Northwest Territories Water Board established guidelines for contingency planning to assist licensees in preparing comprehensive plans to respond to operational accidents, spills, and system failures affecting water and waste disposal operations. The guidelines outline formats and content requirements for both spill contingency plans and general contingency plans, including response organization, reporting procedures, environmental mapping, and training exercises.