Acid Rock Drainage

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Seepage Survey Report, Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, August 2019)
23 August 2019Regulatory Filing
The Wek'èezhìi Land and Water Board issued a decision on August 23, 2019 regarding Dominion Diamond Mines' 2018 Seepage Survey Report for the Ekati mine, approving discontinuance of summer rainfall sampling at Fox WRSA while directing substantial updates to the Waste Rock and Ore Storage Management Plan including tiered action levels, clarified receiving environment definitions, and enhanced adaptive management frameworks for seepage monitoring and response.
Waste Rock Water Quality Regulatory Monitoring
Waste Rock and Waste Rock Storage Area Seepage Survey Report, Ekati Diamond Mine (Dominion Diamond, April 2019)
24 April 2019Report
This 2018 Waste Rock and Waste Rock Storage Area Seepage Survey Report documents Dominion Diamond Mines' compliance with Water Licence W2012L2-0001 requirements for monitoring seepage quality and waste rock geochemistry at the Ekati Diamond Mine. The report identifies 8 seeps of potential concern in 2018 and presents adaptive management actions, waste rock characterization data from multiple pits, and seepage monitoring results from six waste rock storage areas, concluding that no adverse effects on receiving waterbodies were detected despite elevated constituent concentrations at some seep locations.
Waste Rock Acid Rock Drainage Water Quality
Interim Closure and Reclamation Plan (ICRP), Version 3.0, Technical Memorandum on Effective Neutralization Potential, Ekati Diamond Mine (Dominion Diamond, August 2018)
14 August 2018Letter
Dominion Diamond Ekati ULC responds to a Wek'èezhìi Land and Water Board decision requiring investigation of effective neutralization potential (NP) of waste rock at the Ekati mine, submitting a technical memorandum by Golder Associates that outlines geochemical characterization methods and two ongoing programs to determine effective NP and address uncertainty in PAG/non-PAG rock classification.
Geochemistry Waste Rock Acid Rock Drainage
Waste Rock and Ore Storage Management Plan (WROMP), Version 9.0, Board Directive and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, June 2018)
27 June 2018Regulatory Filing
The Wek'èezhìi Land and Water Board approved Version 9.0 of Dominion Diamond Ekati ULC's Waste Rock and Ore Storage Management Plan and Version 2.0 of the Sable Waste Rock Storage Area Design Report on June 20, 2018, with conditions requiring revisions regarding East WRSA placement restrictions, geochemical uncertainty resolution, geotechnical stability confirmation, and technical corrections.
Waste Rock Regulatory Water Licence Acid Rock Drainage
Waste Rock and Ore Storage Management Plan (WROMP) Version 9.0, Sable Waste Rock Storage Area Design Report, Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, May 2018)
28 May 2018Letter
The Independent Environmental Monitoring Agency submits detailed comments on Dominion Diamond's Waste Rock and Ore Storage Management Plan version 9.0 and Sable Waste Rock Storage Area Design Report version 2.0, providing nine recommendations addressing seepage containment, acid rock drainage potential, design capacity, geotechnical investigations, adaptive management, and documentation updates.
Waste Rock Acid Rock Drainage Geochemistry
Waste Rock and Ore Storage Management Plan (WROMP), Version 8.0, Board Directive and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, May 2018)
22 May 2018Regulatory Filing
The Wek'èezhìi Land and Water Board approved Version 8.0 of Dominion Diamond Ekati's Waste Rock and Ore Storage Management Plan and Version 2.0 of the Jay Road Construction Plan on May 17, 2018, with required revisions addressing uncertainties in the geochemical characterization of diabase rock discovered in the Lynx Pit and its suitability for construction use. The Board mandated a risk mitigation program including rock sampling, seepage monitoring, and additional geochemical analysis before diabase can be used as a construction material.
Waste Rock Regulatory Geochemistry
Waste Rock and Ore Storage Management Plan (WROMP) Version 8.0, Lynx Diabase, Agency Comments, Ekati Diamond Mine (Independent Environmental Monitoring Agency, March 2018)
28 March 2018Letter
The Independent Environmental Monitoring Agency provides detailed technical comments on Dominion Diamond's Waste Rock Ore Management Plan Version 8.0 regarding the Lynx Diabase, raising concerns about the adequacy of effective neutralizing potential analysis, sampling representativeness, and the appropriateness of using Lynx diabase as construction material for the Jay Project until further geochemical characterization is completed.
Waste Rock Acid Rock Drainage Geochemistry Development Plans
Three Year Seepage Report, Board Directive and Reasons for Decision, Ekati Diamond Mine (Wek'èezhìı Land and Water Board, January 2018)
25 January 2018Regulatory Filing
The Wek'èezhìi Land and Water Board approved Dominion Diamond Ekati ULC's 2016 Three-Year Seepage Survey Report (2014-2016) on January 25, 2018, and issued directives requiring submission of revised monitoring plans, waste rock management updates, and closure risk assessments with the 2017 Annual Seepage Report.
Regulatory Water Licence Waste Rock
Waste Rock and Ore Storage Management Plan (WROMP), Version 8.0, Lynx Diabase, Ekati Diamond Mine (Dominion Diamond, January 2018)
25 January 2018Regulatory Filing
Dominion Diamond Ekati ULC submits updated Waste Rock and Ore Management Plan (WROMP) Version 8.0 and Jay Road Construction Plan Version 2.0 to the Wek'èezhìi Land and Water Board for approval, reflecting the discovery and management of diabase material in the Lynx Pit and its use as non-PAG construction material for roads and infrastructure.
Waste Rock Geochemistry Acid Rock Drainage
Waste Rock and Waste Rock Storage Area Seepage Survey Report, Ekati Diamond Mine (Dominion Diamond, March 2017)
31 March 2017Report
This 2016 Waste Rock and Waste Rock Storage Area Seepage Survey Report documents monitoring of waste rock storage areas and seepage quality at the Ekati Diamond Mine, prepared by SRK Consulting for Dominion Diamond Ekati Corporation in compliance with Water Licence W2012L2-0001. The report presents results from waste rock sampling, coarse kimberlite reject characterization, and seepage monitoring conducted during freshet, summer, and fall surveys across multiple mine areas including Panda/Koala, Fox, Misery, Pigeon, and Lynx.
Waste Rock Acid Rock Drainage Geochemistry
Cover System Design for Mine Closure Short Course, Mine Closure 2011 (BHP Billiton, September 2011)
18 September 2011Report
This is the conference program and materials for the 6th International Conference on Mine Closure held September 18-21, 2011 at the Fairmont Chateau Lake Louise in Alberta, Canada. The document includes a short course on Cover System Design for Mine Closure delivered on September 18, 2011 by experts from the University of Alberta and Golder Associates, along with the full conference schedule, plenary speakers, technical sessions, and sponsorship information for the 600-delegate international conference on mine closure practices.
Closure & Reclamation Closure Plan Waste Rock
Guidelines for the Closure and Reclamation of Advanced Mineral Exploration and Mine Sites in the NWT (AANDC, 2011)
~2011Report
Approximate date — inferred from filename
Comprehensive guidelines for closure and reclamation planning of advanced mineral exploration and mine sites in the Northwest Territories, developed jointly by Aboriginal Affairs and Northern Development Canada and the Mackenzie Valley Land and Water Boards. The document outlines regulatory requirements, an objectives-based approach to closure planning, and technical considerations for site closure and reclamation.
Closure & Reclamation Closure Plan Post-Closure Monitoring
Creating Lakes from Open Pit Mines, Processes and Considerations with Emphasis on Northern Environments (DFO, 2009)
~2009Report
Approximate date — inferred from filename
A comprehensive technical report on the formation, characteristics, and management of pit lakes created from open pit mining operations, with emphasis on northern environments and applications to diamond mining in Canada. The report covers hydrogeology, limnology, geochemistry, biology, modeling approaches, and strategies for enhancing beneficial end uses such as fish habitat and water supply.
Aquatics Fish Habitat Water Quality
Rejuvenation Through Reclamation and Operating for Closure: Proceedings of the 31st Annual British Columbia Mine Reclamation Symposium (TRCR, September 2007)
20 September 2007Report
Proceedings of the 31st Annual British Columbia Mine Reclamation Symposium held September 17-20, 2007 in Squamish, featuring technical papers on mine reclamation practices, case studies from Canadian mines, and research on environmental remediation including acid rock drainage treatment, revegetation, wildlife habitat restoration, and legacy mine site management.
Closure & Reclamation Waste Rock Acid Rock Drainage Wildlife
Interim Closure and Reclamation Plan (ICRP), Appendices Volume 2 - Draft (BHP Billiton, January 2007)
1 January 2007Report
This document is the draft Interim Closure and Reclamation Plan (ICRP) for the Ekati Diamond Mine, prepared by BHP Billiton in January 2007, providing comprehensive closure objectives, reclamation criteria, research plans, and monitoring protocols for all major mine components including open pits, underground mines, waste rock storage areas, and containment facilities.
Closure & Reclamation Closure Plan Post-Closure Monitoring
Environmental Impact Report Information Session, Responses to Questions, Ekati Diamond Mine (BHP Billiton, June 2006)
15 June 2006Meeting Minutes
Transcript of questions and responses from the June 15-18, 2006 Environmental Impact Report Information Session at Ekati Diamond Mine, where BHP Billiton representatives and consultants addressed community and government concerns regarding mining operations, environmental management, wildlife impacts, water quality, waste disposal, and closure planning.
Development Plans Waste Rock Closure & Reclamation
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
Financial Assurance for Mine Closure & Reclamation Reference Binder (ICMM, February to April 2005)
1 February 2005Report
An ICMM-commissioned study examining environmental financial assurance (EFA) instruments and policies for mine closure and reclamation globally, providing framework and negotiation guidelines for governments and mining companies to balance environmental protection with investment climate and cost efficiency.
Closure & Reclamation Closure Plan Regulatory Waste Rock Acid Rock Drainage
Public Hearing Binder, Renewal of Ekati Diamond Mine Water Licence N7L2-1616 (MV2003L2-0013) (IEMA, July 2004)
2004Report
MV2003L2-0013 Public Hearing Binder for Renewal of Ekati Water Licence N7L2-1616, July 6-7 2004, compiled by the Independent Environmental Monitoring Agency for the Mackenzie Valley Land and Water Board (MVLWB Yellowknife). Key issues: Precautionary Principle, Effluent Discharge Limits, Abandonment & Restoration Plan, Waste Rock Seepage. Includes BHP Billiton Diamonds Inc. (BBDI) discussion of Discharge Criteria and predicted downstream AEMP increases in pH, sulphate, TDS, potassium, nitrate, nitrite, molybdenum and chloride. Appendix II Supporting Documents: Rescan Sept 2003 "Comparative Study: EIS Predictions versus Actual", 2001 Fox Waste Rock and Ore Storage Management Plan Addendum #1 (Approved by MVLWB August 2003), 2000 Spill records.
Regulatory Water Licence Water Quality
Introduction to Metal Leaching and Acidic Drainage, Course Booklet #1 (BHP Billiton, September 2003)
2003Report
"Introduction to Metal Leaching and Acidic Drainage" — course material from a Northwest Community College workshop September 22-26 2003, instructor Bill Price. Covers ML/ARD definitions and mining relevance, material characterization and prediction, limestone-drain treatment of seepage/subsurface drainage (limited by acid and sulphate loading rates, prone to precipitate clogging), contingency planning for prediction uncertainty, site-specific mitigation, cumulative count of major BC mines with identified ML/ARD concerns (1970-1990 historic-closed/recently-closed/operating categories), and acknowledgements to Mike Aziz (Equity Silver), Kim Bellefontaine (BC MEM), Glenda Ferris, Mark Freberg (Highland Valley Copper), Doug Johnson (Huckleberry Mine), Walter Kuit, Bruce Donald (TeckCominco).
Acid Rock Drainage Waste Rock Geochemistry

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