Kimberlite Tailings

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Interim Abandonment and Reclamation Plan, Ekati Diamond Mine (BHP Billiton, July 2003, revised April 2004)
9 April 2004Report
This interim abandonment and reclamation plan for the Ekati Diamond Mine describes the reclamation strategy for seven kimberlite pipes (Panda, Koala, Beartooth, Fox, Misery, Sable, and Pigeon) and associated mine infrastructure, addressing regulatory requirements, environmental management, progressive reclamation during mine operations, and final closure procedures scheduled for 2016.
Closure & Reclamation Closure Plan Revegetation
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
Processed Kimberlite Tailings Reclamation Research Program 2003 Annual Report, Ekati Diamond Mine (BHP Billiton, December 2003)
1 December 2003Report
This 2003 annual report documents four years of revegetation research on processed kimberlite tailings at the EKATI Diamond Mine's Long Lake Containment Facility (LLCF). The studies evaluate soil amendments, seeding strategies, and native plant establishment methods to determine whether vegetative cover is viable for reclaiming the facility instead of the originally proposed rock cover.
Closure & Reclamation Revegetation Kimberlite Tailings Monitoring
Interim Abandonment and Reclamation Plan, Ekati Diamond Mine (BHP Billiton, July 2003)
30 July 2003Report
This interim abandonment and reclamation plan describes BHP Billiton's strategy for reclaiming disturbed areas at the Ekati Diamond Mine following the mining of seven kimberlite pipes through 2014, detailing reclamation approaches for pit lakes, waste rock storage, processed kimberlite containment facilities, water management structures, and supporting infrastructure to restore stable landforms and wildlife habitat.
Closure & Reclamation Closure Plan Revegetation
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
Tailings Management Binder 2, Wastewater and Processed Kimberlite Management Plan Lifecycle, Ekati Diamond Mine (BHP Billiton, 2003 to 2008)
2003–2008Letter
Tailings Management Binder 2 (2002-2008) for the Ekati Diamond Mine (BHP Billiton). Correspondence between Eric Denholm (BHPB), Sarah Baines (WLWB), Kathleen Racher (DIAND), Tony Pearse (IEMA / Agency), Jim Millard (Environmental Specialist BHP), John Witteman (Environmental Manager BHP), Violet Camsell-Blondin (WLWB Chair). Includes BHPB comments on LLCF water quality model reviews, Wastewater and Processed Kimberlite Management Plan (WPKMP) Conformity Table for Water Licence N7L2-1616 (Section F.1.a.i comprehensive source description), interim water quality objective for chloride from Tier I Ecological Risk Assessment, calcium chloride questions, and kimberlite-and-silicosis discussion.
Wastewater Water Quality Kimberlite Tailings
Pigeon Pipe Acid/Alkaline Rock Drainage (ARD) and Geochemical Characterization Plan (SRK Consulting, January 2003)
1 January 2003Report
This document presents the Acid/Alkaline Rock Drainage (ARD) and Geochemical Characterization Plan for the Pigeon Pipe at the Ekati Diamond Mine, prepared by SRK Consulting for BHP Billiton Diamonds to meet Water License MV2001L2-0008 conditions. The plan describes geochemical testing results, waste rock management strategies, and monitoring protocols for host rocks (biotite granite, diabase, biotite schist) and kimberlite, incorporating adaptive management based on operational experience from the Panda and Misery pipes.
Acid Rock Drainage Waste Rock Geochemistry
Land Use Permit and Water Licence Inspection Reports, Ekati Diamond Mine (DIAND, 2003 to 2009)
2003–2009Report
Land Use Permit and Water Licence Inspection Reports binder July 2001 onwards (with note that October 2003 reports are archived in the IEMA file cabinet storage room). Includes inspection of underground mine workshops & refuelling stations, underground-mine-operations dewatering sump system, waste-management stations / material laydown / lunchrooms, January 2008 Industrial Water Use Inspection (BHP Billiton — Julie Ellison and Laura Tyler reps, Manager Environment Laura Tyler), 2003 Fox Floc Plant generator and Booster Pump #2 photos, Fox Haul Road Surveillance Network Program documentation.
Water Quality Regulatory Water Licence Waste Rock
BHP Ekati Diamond Mine Site & Regional Maps (BHP Billiton, 2003)
~2003Map
Approximate date — inferred from filename
Site map of the BHP Ekati Diamond Mine showing mining infrastructure, pit locations, water management features, and surrounding geographic features in the Northwest Territories.
Development Plans Waste Rock Kimberlite Tailings Water Quality
Processed Kimberlite Tailings Reclamation Research Program, 2002 Annual Report, Ekati Diamond Mine (Harvey Martens & Associates, December 2002)
1 December 2002Report
BHP Billiton Diamonds Inc. conducted a comprehensive seven-year reclamation research program on processed kimberlite tailings at the Ekati Diamond Mine in the Northwest Territories, with this 2002 annual report documenting revegetation trials, soil amendment studies, native plant establishment methods, and trace element assessments to determine optimal long-term stabilization strategies for mine tailings.
Closure & Reclamation Revegetation Kimberlite Tailings
Establishment of a Vegetation Cover on Kimberlite Mine Tailings (University of Alberta, 2002)
~2002Report
Approximate date — inferred from filename
This Master's thesis investigates the establishment of vegetation cover on processed kimberlite mine tailings at the Ekati Diamond Mine in the Northwest Territories through greenhouse and field studies. The research evaluates structural and nutrient-providing amendments to overcome tailings limitations and facilitate permanent vegetation stabilization using native grass species.
Closure & Reclamation Revegetation Kimberlite Tailings Monitoring
Annual Water Licence Geotechnical Inspection (EBA Engineering, August 2002)
~2002Report
Approximate date — inferred from filename
EBA Engineering completed the annual water licence geotechnical inspection of five water-retaining structures at Ekati Diamond Mine between July 19–23, 2002, documenting observations on stability, water levels, ground temperatures, seepage, and settlement at Phase 1 Pond, Panda Diversion Dam, Long Lake Outlet Dam, Intermediate Dyke B, and King Pond Dam.
Regulatory Water Licence Waste Rock Geochemistry Kimberlite Tailings
Waste Rock and Ore Storage Management Plan Support Document, Addendum #1, Fox Pipe, Ekati Diamond Mine (BHP Billiton, June 2002)
1 June 2002Report
This addendum to the approved Waste Rock and Ore Storage Management Plan (February 2000) presents updated geological, geochemical, and characterization data for the Fox Pipe at Ekati Diamond Mine, along with refinements to waste rock management strategies based on site experience and adaptive management practices since 2000. The plan describes geochemical testing results, monitoring methods, and waste rock storage management strategies incorporating permafrost formation, encapsulation of reactive kimberlite, and toe berm construction to control runoff.
Waste Rock Geochemistry Acid Rock Drainage
MEND Reports Available, Catalogue of Acid Mine Drainage Research Reports (MEND, 2002)
22 May 2002Report
A comprehensive catalog of MEND (Mine Environment Neutral Drainage) program reports and resources available for purchase, covering research, prevention, control, and treatment methods for acid mine drainage from mining operations, with ordering information for the MEND Secretariat.
Acid Rock Drainage Waste Rock Geochemistry Water Quality
Processed Kimberlite Deposition Investigation, Ekati Diamond Mine (EBA Engineering, May 2002)
1 May 2002Report
EBA Engineering assessed the physical properties of processed kimberlite deposited in Cell B of the Long Lake Containment Facility at the Ekati Diamond Mine, conducting a field program in March 2001 that recovered samples and installed instrumentation to characterize three distinct zones of varying composition and consolidation state. The investigation found excess ice in the frozen middle layer (Zone B) resulting in higher void ratios than design assumptions, while unfrozen material below (Zone C) was consolidating as anticipated.
Waste Rock Kimberlite Tailings Monitoring Water Quality
Basic Geotechnical Engineering Applied to Mine Waste, Technical Short Course (BGC Engineering Inc., April 2002)
22 April 2002Report
A comprehensive technical short course delivered by BGC Engineering Inc. on geotechnical engineering applied to mine waste, covering soil mechanics, permafrost terrain, tailings dam design, construction methods, monitoring instrumentation, and case histories of dam failures including Omai (1995), Los Frailes (1997), and permafrost-related failures.
Waste Rock Closure & Reclamation Geochemistry Kimberlite Tailings
Notice of Training Session, Environmental Review of Mines Seminar (Mehling Environmental Management, March 2002)
14 March 2002Letter
Notice of a 5-day training session on environmental review of mines to be held April 22–26, 2002 in Yellowknife, covering geochemistry, water quality, tailings management, and risk assessment methodology for northern mining projects.
Acid Rock Drainage Geochemistry Waste Rock
Soil Covers in Cold Climates (Mehling, March 2002)
~2002Presentation
Approximate date — inferred from filename
Technical presentation on soil cover design strategies for mine waste in cold climates, including barrier covers, store-and-release systems, and frozen covers that utilize below-freezing temperatures to restrict acid rock drainage generation.
Waste Rock Acid Rock Drainage Closure & Reclamation
Investigation of the Fate of Wastewater Phosphorus within the Processed Kimberlite Containment Area, Ekati Diamond Mine (University of Alberta, 2002)
19 February 2002Report
This Master of Science thesis by Karen Patricia Graham investigates the adsorption of phosphorus from wastewater effluent onto kimberlite tailings in BHP's Ekati Diamond Mine's processed kimberlite containment area through controlled laboratory isotherm studies. The research determines that approximately 0.5 kg of dried kimberlite per litre of wastewater effluent is needed at 18°C to reduce phosphorus concentration from 10 mg/L to 0.1 mg/L, with results showing that coagulant and flocculant addition does not affect phosphorus adsorption, and pH and temperature changes do not cause desorption.
Wastewater Kimberlite Tailings Waste Rock Monitoring

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