Wastewater

Effluent treatment, mine wastewater handling, discharge water

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Long Lake Containment Facility (LLCF) Seasonal Water Quality Investigation, 2005–2006, Ekati Diamond Mine (BHP Billiton, October 2007)
1 October 2007Report
This report presents the results of a seasonal water quality investigation of the Long Lake Containment Facility (LLCF) at the Ekati Diamond Mine conducted from December 2005 to September 2006, measuring physical and chemical parameters across five cells to understand stratification, mixing processes, and salt exclusion effects related to processed kimberlite management.
Water Quality Monitoring Wastewater Aquatic Effects Monitoring (AEMP)
Long Lake Containment Facility (LLCF) Seasonal Water Quality Investigation 2004 to 2005, Ekati Diamond Mine (BHP Billiton, July 2007)
1 July 2007Report
This report presents a comprehensive investigation of seasonal water quality changes in the Long Lake Containment Facility (LLCF) tailings facility at Ekati Diamond Mine during 2004-2005, examining unexpected increases in contaminant concentrations observed during winter 2003/04 through field sampling, historical data analysis, and water quality modelling. The study concludes that high winter concentrations result from natural processes including solute exclusion from ice formation, stratification in Cell D, and pumping operations that draw poorer-quality water from deeper layers.
Water Quality Monitoring SNP Waste Rock
Environmental Impact Report 2006, Ekati Diamond Mine (BHP Billiton, April 2006)
1 April 2006Report
The EKATI Diamond Mine Environmental Impact Report 2006 compares environmental monitoring results from 2003-2005 with predictions from the 1995 Environmental Impact Statement, finding that over 90% of residual effects were positive, negligible, or minor, though noting increasing ion and nutrient concentrations downstream of the Long Lake Containment Facility and a moderate alteration of caribou distribution relative to the mine footprint.
Monitoring Water Quality Air Quality
Mine Waste Management in the North, Best Practices and Emerging Technologies Workshop (CANMET, November 2005)
18 November 2005Presentation
This document is a comprehensive presentation from a workshop on Mine Waste Management in the North held in Yellowknife, NWT on November 18, 2005, featuring multiple expert presentations covering acidic drainage prediction and prevention, tailings and waste rock management strategies, water treatment options, biological approaches, and mine reclamation principles with emphasis on northern and permafrost-specific conditions.
Waste Rock Acid Rock Drainage Wastewater
Changes to Long Lake Containment Facility (LLCF) Effluent (IEMA, March 2005)
17 March 2005Presentation
This workshop presentation reviews changes to Long Lake Containment Facility (LLCF) effluent at Ekati Diamond Mine, documenting unexpected increases in conductivity, sulphate, potassium, and molybdenum since summer 2003. BHPB is investigating the causes through special studies while the Independent Environmental Monitoring Agency recommends continued tracking of these water quality changes.
Water Quality SNP Monitoring
Landfarm 2004 Annual Report, Ekati Diamond Mine (EBA Engineering, March 2005)
2005Report
Ekati Diamond Mine Landfarm 2004 Annual Report, prepared by EBA Engineering Consultants Ltd. for BHP Billiton Diamonds Inc. (Yellowknife), March 2005, EBA Project 5100945.001. Documents the Landfarm sump (east corner) and hydrocarbon-impacted soil stockpiles photographed June-August 2004 from multiple angles, and Enviro-Test Soil Salinity Conversion analytical results (Lab L156547, Sample TP7 sampled March 1 2004) for Chloride, Sulphate, Calcium, Potassium, Magnesium, Sodium in mg/L, %Sat, Meq/L, Dry Soil mg/kg formats.
Monitoring Waste Rock Geochemistry
Contaminated Snow Containment Facility 2004 Annual Report (EBA Engineering, March 2005)
1 March 2005Report
This 2004 annual report documents the operational activities and management of the Contaminated Snow Containment Facility (CSCF) at Ekati Diamond Mine, including ice transfer, facility inspections, water sampling results, and removal of hydrocarbon-impacted water and debris. The facility successfully contained approximately 422 m³ of hydrocarbon-impacted ice and managed 234.5 m³ of contaminated water disposal during the 2004 operational season.
Wastewater Monitoring Water Quality Closure & Reclamation
Surveillance Network Program (SNP) Monthly Reports, Ekati Diamond Mine (BHP Billiton, January 2005 to February 2006)
2005Report
Surveillance Network Program (SNP) January 2005 Monthly Reports binder for the Ekati Diamond Mine, BHP Billiton Diamonds Inc. (transmitted March 31 2006 to South Mackenzie District INAC). Includes August 2005 SNP Monthly Reports for station 0008-Be2 (under Water Licence MV2001L2-0008) covering Historical Total Chromium (Discharge Criteria Max Average 0.02 mg/L / Max Grab 0.04 mg/L), Historical Nickel and Total Zinc (Max Average 0.01 mg/L / Max Grab 0.02 mg/L) trend charts, and historical Chloride levels at station 1616-30 January 2005 onwards, with notes that sampling was not conducted at station 1616-43 (per October 2004 SNP report).
SNP Water Quality Water Licence
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
Studies in Long Lake, 2003 (Independent Environmental Monitoring Agency, March 2004)
2004Presentation
Independent Environmental Monitoring Agency (IEMA) workshop presentation: "Studies in Long Lake — 2003" presented at the Review of Ekati's Environmental Monitoring and Management Programs Workshop, March 16-17 2004. Includes Long Lake Containment Facility (LLCF) Cells C/D/E descriptions, Study #3 on Long Lake water quality prediction model update, evaluation of Fox Pit water discharge to Cell D vs Cell C effect on Cell E water quality, Cumulative Effects Monitoring (CCME water-licence variables) results, Panda Diversion Channel (PDC) facts (3.3 km long, 2-10 m wide between lakes) outletting into Kodiak Lake, and Arctic grayling spawning study (PDC repeat spawners male/female ratio, female survival).
Aquatics Water Quality Monitoring
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
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
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
Annual Water Licence Geotechnical Inspection (2003), Ekati Diamond Mine (EBA Engineering, July 2003)
31 July 2003Report
EBA Engineering Consultants Ltd. completed the annual water licence geotechnical inspection of seven water control structures at Ekati Diamond Mine between July 6-9, 2003, including Phase I Pond, Panda Diversion Dam, Long Lake Outlet Dam, Intermediate Dyke B, King Pond Dam, Waste Rock Dam, and Desperation Pond Cofferdams, documenting their condition through visual observations, ground temperature data, and settlement monitoring.
Regulatory Water Licence Monitoring Wastewater
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
Land Use Permit & Water Licence Inspection Report Related Correspondence (BHP Billiton, July 2003 to May 2006)
2003Report
Land Use Permit and Water Licence Inspection Report Related Correspondence binder for the Independent Environmental Monitoring Agency. Includes May 19 2006 INAC (Yellowknife) follow-up correspondence on inspection findings, email thread between Matthew Otto (BHP Billiton), Darnell McCurdy (INAC), Chris Hanks (BHPB), and Jane Howe (BHPB) on April 2007 inspection issues — drums and debris accumulation on site, containment-berm water-volume integrity, mandatory pumping of contained water for operational integrity, and BHP Billiton's recognition of the concern.
Regulatory Inspections Water Licence Wastewater
HSEC (Health, Safety, Environment & Community) Report 2003, Ekati Diamond Mine (BHP Billiton, July 2002 to June 2003)
30 June 2003Report
BHP Billiton's HSEC Report 2003 documents the Ekati Diamond Mine's health, safety, environment, and community performance for the fiscal year July 1, 2002 to June 30, 2003, covering operational metrics, environmental management systems, safety achievements, and community consultation outcomes.
Monitoring Closure & Reclamation Water Quality

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