Water Quality

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

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Reclamation Liability Estimate & Demolition and Salvage Estimate, Ekati Diamond Mine (Komex, May 2001)
31 May 2001Report
Komex International prepared a reclamation liability estimate for the Ekati Diamond Mine comparing current liability costs (approximately $50.8 million) with ultimate closure costs (approximately $136.4 million) across multiple mine components including open pits, tailings cells, waste rock piles, and camp facilities, using the RECLAIM model and incorporating site-specific data and professional judgment.
Closure & Reclamation Closure Plan Waste Rock Monitoring
Reclamation Liability Estimate & Demolition and Salvage Estimate, Ekati Diamond Mine (Komex, May 2001)
10 May 2001Report
Komex International Ltd. prepared a reclamation liability estimate for BHP Diamonds Inc.'s Ekati Diamond Mine using Monte Carlo Simulation methodology to calculate comprehensive closure and reclamation costs for 2001, 2005, 2010, and 2014, with median estimates ranging from $50.8 million to $90.3 million across various liability units including pit flooding, facility decommissioning, monitoring, and revegetation.
Closure & Reclamation Closure Plan Waste Rock Water Quality Revegetation Fish Habitat
Various Lake Studies Preliminary Screening, Desperation and Carrie Ponds, Misery Pipe (BHP Billiton, May 2001)
1 May 2001Report
This preliminary screening report documents BHP Diamonds Inc.'s application to the Department of Fisheries and Oceans for authorization to develop Desperation and Carrie Ponds as part of the Misery Pit waste rock storage facility at Ekati Diamond Mine. The report quantifies fish habitat losses (0.587 weighted habitat units) and proposes compensatory enhancements to other water bodies to achieve no net loss of fish productivity.
Fish Habitat Aquatics Waste Rock Water Quality
Oxygen in Lakes North of the Tree Line: A Review (Northwater Consultants, May 2001)
2001Email
Email transmittal and review paper "Oxygen in Lakes North of the Tree Line — A Review" forwarded by Zabey Nevitt (Independent Environmental Monitoring Agency, monitor@yk.com) to Robin Staples (May 23 / 31 2001), originally from Camille Douglas (BHP) referencing work by H.E. Welch. Discusses winter respiration rates of Canadian Arctic lakes (0.08-0.45 g O2/m²/d), winter oxygen depletion, P&N Lake oxygen isopleths (Welch and Legault 1986), and the ~2-3 mg/L dissolved-oxygen threshold below which most Arctic fish die. References Welch, Dillon, Sreedharan, and Saqvaqjuac NWT studies.
Aquatics Water Quality Monitoring
#4 Panda Waste Rock Storage Area, EMCP Beartooth & Bearclaw Drainage, Meeting Presentations (BHP Billiton, April 2001)
23 April 2001Presentation
BHP presentation on the 2000 Enhanced Monitoring and Confirmation Plan for the Panda Waste Rock Storage Area at Ekati Diamond Mine, detailing waste rock characterization, seepage chemistry assessment, and hydrological investigations to address regulatory concerns about low pH seepage from mining operations.
Waste Rock Acid Rock Drainage Geochemistry
Review of Ekati Information on Seepage and Waste Rock Geochemistry (Minesite Drainage Assessment Group, March 2001)
2 April 2001Report
This geochemical review by the Minesite Drainage Assessment Group evaluates BHP and SRK's 2000 seepage survey data from the Ekati Diamond Mine, finding that acid rock drainage (ARD) is more extensive and severe than reported—affecting approximately 26-27% of seep analyses rather than only one documented seep—and is migrating through the shallow groundwater system toward Beartooth and Bearclaw Lakes. The report identifies significant gaps in the SRK classification system, contradictions in interpretations, data gaps, and equipment failures, recommending comprehensive individual seep characterization, groundwater monitoring, water treatment, and retention of qualified technical specialists to manage the serious and worsening water-quality problems.
Acid Rock Drainage Waste Rock Geochemistry
BHP Newsletter, Issue 6, EKATI Diamonds Go Retail (BHP Billiton, April 2001)
1 April 2001Report
BHP Diamonds Inc. newsletter for April 2001 announcing the retail launch of EKATI brand diamonds, providing updates on mine operations including safety achievements, environmental monitoring workshops, regulatory approvals for new kimberlite pipes (Sable, Pigeon, Beartooth), operating excellence initiatives, and winter road resupply operations delivering approximately 88,000 tons of freight.
Development Plans Monitoring Regulatory Water Quality
EKATI Newsletter, Issue 6 (BHP Billiton, April 2001)
1 April 2001Report
BHP Diamonds Inc.'s April 2001 newsletter covering Ekati Diamond Mine operations, including the launch of EKATI™ brand retail diamonds, safety achievements, environmental workshops, regulatory progress on new kimberlite pipes (Sable, Pigeon, Beartooth), and winter resupply logistics.
Development Plans Correspondence Regulatory Water Quality
Environmental Agreement and Water Licence Annual Report 2000, Ekati Diamond Mine (BHP Billiton, March 2001)
31 March 2001Report
BHP Diamonds Inc. submitted its 2000 Environmental Agreement and Water Licence Annual Report for the Ekati Diamond Mine, documenting the second full year of mine production and compliance with regulatory requirements. The report covers mining operations at four kimberlite pits, environmental monitoring programs, reclamation activities, and continuous improvements including management of processed kimberlite, sewage discharge relocation, and mitigation of low dissolved oxygen in Kodiak Lake.
Environmental Agreement Water Licence Monitoring
West Kitikmeot Slave Study, Final Report (Includes 2000 to 2001 Annual Report) (West Kitikmeot Slave Study Society, March 2001)
31 March 2001Report
This is the final report of the West Kitikmeot Slave Study Society for 2000-2001, documenting five years of research on environmental and socioeconomic conditions in the Slave Geological Province. The report summarizes 21 approved research projects on wildlife, habitat, physical environment, and socioeconomic issues, with approximately $10 million in funding from governments, mining companies, and aboriginal and environmental organizations.
Traditional Knowledge Wildlife Caribou Water Quality
Environmental Health Requirements for Land & Water Use Permit Applicants (Stanton Regional Health Board, March 2001)
20 March 2001Report
Stanton Regional Health Board outlines environmental health legislative requirements for applicants seeking Land or Water Use Permits in the Northwest Territories, specifying N.W.T. Public Health Act regulations and detailing required information on accommodation, food service, sanitation, sewage, water supply, and effluent discharge.
Regulatory Wastewater Water Quality
Environmental Agreement Annual Report 2000 (BHP Billiton, March 2001)
1 March 2001Report
BHP Diamonds Inc.'s Environmental Annual Report 2000 is a plain English summary of the company's environmental monitoring programs at the Ekati Diamond Mine in the Northwest Territories, documenting compliance with its Environmental Agreement with Canadian and NWT governments and reporting on air quality, water, wildlife, operations, and progressive reclamation efforts.
Environmental Agreement Monitoring Air Quality
Environmental Agreement Annual Report 2000, Plain English Summary, Ekati Diamond Mine (BHP Billiton, 2001)
1 March 2001Report
BHP Diamonds Inc.'s Environmental Agreement Annual Report for 2000 documents the company's environmental monitoring programs and operational activities at the Ekati Diamond Mine in the Northwest Territories, covering air quality, water quality, waste management, wildlife impacts, reclamation efforts, and archaeological investigations conducted during the year.
Environmental Agreement Monitoring Air Quality
Environmental Agreement Annual Report Plain English Summaries, 1999 to 2000 (BHP Billiton, 1999 to 2001)
1 March 2001Report
BHP's Environmental Agreement Annual Report 2000 provides a comprehensive summary of environmental monitoring and mining operations at the Ekati Diamond Mine in the Northwest Territories for the year 2000. The report documents air and water quality monitoring, wildlife effects assessments, waste management practices, reclamation efforts, and integration of traditional knowledge from Aboriginal groups in environmental management at the mine.
Environmental Agreement Monitoring Water Quality
Report of Environmental Assessment on the Proposed Development of Sable, Pigeon and Beartooth Kimberlite Pipes (MVEIRB, February 2001)
7 February 2001Report
The Mackenzie Valley Environmental Impact Review Board's Report of Environmental Assessment on the proposed development of Sable, Pigeon and Beartooth kimberlite pipes by BHP Diamonds Inc., recommending approval subject to mitigation measures to prevent significant adverse effects on the environment and communities in the Mackenzie Valley.
Development Plans Regulatory Water Quality
Panda Waste Rock Storage Area, Beartooth Bearclaw Drainage, 2000 Seepage and Waste Rock Survey Report, Ekati Diamond Mine (SRK Consulting, February 2001)
1 February 2001Report
This 2000 seepage and waste rock survey report documents BHP's expanded monitoring program investigating unexpectedly low pH seepage from the Panda Waste Rock Storage Area at Ekati Diamond Mine, examining potential causes including naturally acidic precipitation, organic decomposition, waste rock breakdown, and sulphide mineral oxidation. The study found three types of seeps with varying pH levels and identified that most seeps pose low toxicity risk to aquatic organisms, though one strongly acidic seep may be affected by sulphide mineral oxidation in carbonate-depleted kimberlite.
Waste Rock Acid Rock Drainage Geochemistry Aquatics
Panda Waste Rock Storage Area, Beartooth Bearclaw Drainage, 2000 Seepage and Waste Rock Survey Report, Ekati Diamond Mine (SRK Consulting, February 2001)
1 February 2001Report
This 2000 seepage and waste rock survey report documents BHP Diamonds' investigation into acidic seepage detected from the Panda waste rock storage area at Ekati Diamond Mine, fulfilling requirements of Water Licence N7L2-1616. The expanded monitoring program tested multiple hypotheses for low pH seepage including precipitation acidity, organic decomposition, sulphide mineral oxidation, and ammonia oxidation, with results indicating that low pH is primarily due to natural acidic precipitation and plant decomposition, with one seep showing evidence of sulphide mineral oxidation but overall low toxicity risk to aquatic organisms.
Waste Rock Acid Rock Drainage Water Quality
Priority Substances List Assessment Report, Ammonia in the Aquatic Environment (Environment Canada & Health Canada, February 2001)
1 February 2001Report
This Priority Substances List Assessment Report evaluates whether ammonia in the aquatic environment meets the definition of 'toxic' under the Canadian Environmental Protection Act, 1999. The report concludes that ammonia is entering the aquatic environment in quantities and concentrations that have or may have harmful effects on aquatic ecosystems, particularly through chronic toxicity to sensitive fish species and benthic invertebrates from municipal wastewater discharges.
Water Quality Aquatics Benthic Invertebrates
Report of Environmental Assessment on the Proposed Development of Sable, Pigeon & Beartooth Kimberlite Pipes, Ekati Diamond Mine (MVEIRB, February 2001)
2001Report
Mackenzie Valley Environmental Impact Review Board (MVEIRB) Report of Environmental Assessment on the Proposed Development of Sable, Pigeon and Beartooth Kimberlite Pipes, February 7 2001 (Box 938 Scotia Centre, 5102-50th Avenue, Yellowknife). Concludes BHP did not provide adequate analysis of post-1995 EIA actuals to confirm/modify community-health/wellbeing predictions, projects federal revenue increase of net positive $108 million per year for three development years, and includes referenced documents like Praxis Inc. / Gordon Lennie / Scott Williams (BHP Environment and Resource Planning Manager) Sept 26 2000 responses to DFO Technical Review comments on the BHP Expansion EAR and BHP Responses to Yellowknives Dene Comments.
Development Plans Regulatory Closure & Reclamation Wildlife Air Quality
Incoming & Outgoing Correspondence, Ekati Diamond Mine (IEMA, February to May 2001)
2001Report
Correspondence binder February 2001 – June 2001 for the Independent Environmental Monitoring Agency (IEMA, Yellowknife) covering the Ekati Diamond Mine. Includes Workplace Plus Ltd. (Yellowknife) office invoices, Lutsel K'e Dene Band Wildlife Lands and Environment Committee correspondence (Charlie Catholique Chair), Mackenzie Valley Land and Water Board determinations on Operational Pit testing program amendment requests and public-hearing rationale, Hotmail correspondence (Robin Staples / Robin Billy CIER) on Aboriginal Submissions on the Ekati & Diavik environmental assessments, and BHP submissions concerning amendment validity.
Correspondence Traditional Knowledge Wildlife Water Quality Development Plans

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