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827 documents · Page 6 of 42

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Acute and Chronic Toxicity of Nitrate to Early Life Stages of Lake Whitefish and Lake Trout, Draft Report (BHP Billiton, June 2004)
25 June 2004Report
Laboratory toxicity study examining acute and chronic effects of nitrate exposure on early life stages (embryos, alevins, swim-up fry) of lake whitefish and lake trout collected from the Ekati Diamond Mine region and Lake Simcoe, Ontario. The study determined NOECs, LOECs, and LC50 values for nitrate and found that lake whitefish were more sensitive to chronic nitrate exposure than lake trout, with early developmental stages showing sublethal effects at concentrations as low as 6.25–25 mg/L NO3-N.
Aquatics Water Quality Fish Habitat Development Plans
Evaluation of the Potential Effects on Fish Habitat of Additional Extraction of Water from Grizzly Lake, EKATI Diamond Mine (BHP Billiton, June 2004)
1 June 2004Report
This study evaluates the potential effects on fish habitat of extracting an additional 50,000 m³/year of water from Grizzly Lake at the EKATI Diamond Mine, using a mass balance model under various climatic scenarios. The analysis concludes that while increased extraction could cause significant degradation of summer fish habitat in Grizzly Stream under extreme dry conditions, practical effects would be negligible due to the stream's already poor habitat quality, and impacts to the Panda Diversion Channel and Grizzly Lake itself would be minimal.
Fish Habitat Aquatics Water Quality Regulatory Development Plans
Long Lake Containment Facility (LLCF) Downstream Dilution Study, Ekati Diamond Mine (BHP Billiton, June 2004)
1 June 2004Report
This report presents a downstream dilution study of effluent discharged from the Long Lake Containment Facility (LLCF) into a chain of lakes leading to Lac de Gras. A mass balance dilution model was developed, calibrated against historical water quality data from 1997-2003, and used to predict water quality compliance with CCME guidelines and proposed water licence criteria for 2004-2015.
Water Quality Wastewater Monitoring Development Plans
Best Environmental Management Practices (BMP) for Mining in NWT, Final Draft (BHP Billiton, February 2004)
16 February 2004Report
This document is a final draft comprehensive guideline for best environmental management practices in mining operations across the Northwest Territories, prepared by Gartner Lee Limited for DIAND, covering the complete mine lifecycle from exploration through closure with emphasis on sustainable development principles and northern-specific environmental conditions.
Development Plans Regulatory Closure & Reclamation
Revised Wastewater and Processed Kimberlite Management Plan, Supporting Documents, Ekati Diamond Mine (BHP Billiton, January 30, 2004)
30 January 2004Regulatory Filing
BHP Billiton submission of supporting documents accompanying a revised Wastewater and Processed Kimberlite Management Plan for the Ekati Diamond Mine, including risk assessments, water quality predictions, and fish population surveys.
Wastewater Kimberlite Tailings Water Quality Monitoring
Wastewater and Processed Kimberlite Management Plan (WPKMP), Ekati Diamond Mine (BHP Billiton, January 2004)
30 January 2004Report
BHP Billiton's integrated Wastewater and Processed Kimberlite Management Plan for the Ekati Diamond Mine describes wastewater sources (lake dewatering, site drainage, pit water, sewage) and processed kimberlite disposal into the Long Lake Containment Facility and associated sedimentation ponds, with water and solids balance projections over the mine's 18-year operational life under two water licences.
Wastewater Kimberlite Tailings Water Quality
Data Report on Water Quality, Phytoplankton and Zooplankton of the Long Lake Containment Facility, Ekati Diamond Mine (BHP Billiton, January 2004)
1 January 2004Report
This report presents water quality, phytoplankton, and zooplankton monitoring data collected from Cells C, D, and E of the Long Lake Containment Facility at the Ekati Diamond Mine during July-September 2003, in support of a risk assessment for discharging Fox Pit mine water. The study found significant horizontal gradients in water quality between cells, with stratification in Cells D and E, and documented the effectiveness of filter dykes and dilution processes in reducing suspended solids and contaminant concentrations.
Aquatics Water Quality Monitoring Development Plans
Assessment of the Potential for Effects on Wildlife from Exposure to Processed Kimberlite, Long Lake Containment Facility, Ekati Diamond Mine (BHP Billiton, January 2004)
1 January 2004Report
Golder Associates conducted a wildlife and human health risk assessment for BHP Billiton regarding exposure to processed kimberlite at the Long Lake Containment Facility (LLCF) at the Ekati Diamond Mine. The assessment evaluated potential risks to seven wildlife species and humans consuming caribou that may ingest metals from revegetated processed kimberlite, concluding that no unacceptable health risks to wildlife populations or humans would result from the abandonment and reclamation plan.
Wildlife Closure & Reclamation Caribou
Risk Assessment of Fox Mine Water Discharge in the Long Lake Containment Facility, Ekati Diamond Mine (BHP Billiton, January 2004)
1 January 2004Report
This risk assessment evaluates the relative risk to aquatic life downstream of the Long Lake Containment Facility (LLCF) from discharging Fox Pit mine water into either Cell C or Cell D over the operational life of the Ekati Diamond Mine through 2015. Using mass balance modelling and risk quotient analysis, the assessment concludes that discharge into either cell will result in compliance with water licence effluent requirements, with no significant differences in predicted water quality between the two scenarios.
Water Quality Aquatics Wastewater Regulatory
Prediction of Water Quality for the Long Lake Containment Facility (LLCF), Ekati Diamond Mine (BHP Billiton, January 2004)
1 January 2004Report
This report presents revised water quality prediction modelling for the Long Lake Containment Facility (LLCF) at Ekati Diamond Mine, comparing two scenarios for discharge of treated Fox Pit mine water into different cells. The revised mass balance model incorporates updated site water balance data, treatment removal factors, and cell removal factors to predict discharge water quality concentrations for 26 parameters from 2003 through 2015, with all predicted maximum concentrations remaining below Water Licence effluent requirements.
Water Quality Wastewater Monitoring
Application for Water Licence Renewal, Ekati Diamond Mine (BHP Billiton, December 2003)
12 December 2003Regulatory Filing
BHP Billiton Diamonds Inc. applies to renew water licence N7L2-1616 for continued operation of the Ekati Diamond Mine from 2004 to 2015, detailing water use, waste management, environmental monitoring, and predicted impacts of mining activities in the Koala watershed near Yellowknife, Northwest Territories.
Water Licence Regulatory Development Plans
Revegetation Assessment, Ekati Diamond Mine (EBA Engineering, December 2003)
1 December 2003Report
EBA Engineering Consultants conducted a comprehensive revegetation assessment at the Ekati Diamond Mine in 2003, evaluating transplanting trials (willow cuttings, grass sprigs, legumes), assessing existing reclamation projects (aerial seeding, sod placement, channel restoration), and reviewing topsoil salvage and seed inventory management for future mine closure and reclamation operations.
Closure & Reclamation Revegetation Monitoring Development Plans Water Quality
Strengthening Environmental Assessment in Canada, Amendments to the Canadian Environmental Assessment Act (CEAA, November 2003)
30 October 2003Report
A comprehensive information series from the Canadian Environmental Assessment Agency detailing amendments to the Canadian Environmental Assessment Act that came into force on October 30, 2003, designed to make the federal environmental assessment process more certain, predictable, timely, and to promote high-quality assessments and meaningful public participation.
Regulatory Development Plans Correspondence
Tour Itinerary, Ekati Diamond Mine Water Licence Renewal (BHP Billiton, August 2003)
2003Report
Tour Itinerary for the Ekati Diamond Mine Water Licence Renewal site visit (August 28 2003), prepared by BHP Billiton Diamonds Inc. (Yellowknife) and transmitted to Doug Doan. Includes Stop 5 Koala North Underground (first underground diamond mine in Canada — development began February 2002 using overhand cut-and-fill mining method), water-truck logistics for potable water delivery to Misery Camp and Koala North Underground office/shower facilities, process-plant kimberlite-crushing-and-slurry workflow, and Desperation Pond seepage/runoff collection on the west side of the Misery Waste Rock Storage Area (two cofferdams, 8-tower atomization array, 400,000 m³ water capacity with MVLWB-approved baseline studies and monitoring).
Regulatory Water Licence Development Plans Waste Rock Wastewater Monitoring
Bearclaw Diversion Dam, As-Built Construction Report, Ekati Diamond Mine (EBA Engineering, July 2003)
1 July 2003Report
This as-built construction report documents the construction of the Bearclaw Diversion Dam and associated pipeline civil works at the Ekati Diamond Mine from January to May 2003, detailing design compliance, deviations, construction activities, materials testing, and long-term monitoring procedures for the frozen core dam system.
Development Plans Monitoring Wastewater
Workshop on Sustainable Development for the Diamond Mining Sector, Binder of Proceedings & Presentations (Environment Canada, June 2003)
2003Report
Environment Canada Workshop on Sustainable Development for the Diamond Mining Sector, Ottawa Sheraton Hotel O'Connor Room, June 5-6 2003. Includes "Environmental Review of the Diamond Mining Sector" document (downloadable via Golder Associates gms.golder.com portal), Diamond Exploration Expenditures in Canada 1989-2003 (total $1.4B — NWT, Ontario, Nunavut, Quebec, Alberta breakdown), UK / Australian / South African headquartered companies 2001-2002 spending, Diamonds and Canadian Royalties and Corporate Taxes based on projected mine life (Territorial / Federal / Royalty splits for Ekati), Charles Dumaresq (Environment Canada Minerals and Metals Division) contact, and Conflict Diamonds and the Kimberley Process panel.
Development Plans Regulatory Exploration
Newsletter, Issue 15, Ekati Diamond Mine (BHP Billiton, June 2003)
1 June 2003Report
This June 2003 Ekati Diamond Mine newsletter from BHP Billiton reports on operational updates including the launch of Operation Zero Harm safety program, implementation of First Priority enterprise management system, successful Winter Road logistics, and various awards and workplace recognition activities across the mine operations and corporate offices.
Monitoring Correspondence Development Plans
Wastewater and Processed Kimberlite Management Plan, Ekati Diamond Mine (BHP Billiton, May 2003)
28 May 2003Report
This is an integrated Wastewater and Processed Kimberlite Management Plan for the Ekati Diamond Mine covering two water licences, detailing the management of wastewater sources (lake dewatering, pit water, sewage, site drainage) and processed kimberlite disposal at the Long Lake Containment Facility and other settling ponds over the mine's operational life through 2014.
Wastewater Kimberlite Tailings Water Quality Monitoring
Implementing the NWT CEAM Blueprint, A Gathering, Participant Resource Binder (NWT CEAM Secretariat, May 2003)
2003Report
Implementing the NWT CEAM Blueprint — A Gathering Participant Resource Binder (companion volume), May 13-14 2003, Yellowknife. Compares CEAM (Strategy and Framework) with NWT Cumulative Impact Monitoring Program (CIMP) and Audit — key principles (cannot supersede Aboriginal and treaty rights, existing or future land-claim and self-government agreements), 5-step strategy (ideal CEAM Framework, existing NWT Framework, gap/overlap identification, decision-maker accountability), and Gwich'in Settlement Area (GCLCA 1992 C.24 / MVRMA 1998) regional plans.
Environmental Agreement Monitoring Regulatory Development Plans
Environmental Review of the Diamond Mining Sector (BHP Billiton, May 2003)
1 May 2003Report
This environmental review by Golder Associates examines the environmental implications of diamond exploration and mining in Canada, analyzing the growth of the Canadian diamond sector, technical aspects of diamond mining operations, environmental management practices, and regulatory frameworks. The report documents environmental concerns and effects from Canada's operating diamond mines (Ekati and Diavik) and provides recommendations for future policy development regarding diamond mining activities in Canada.
Development Plans Water Quality Waste Rock

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827 documents · Page 6 of 42