Acid Rock Drainage

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Sable, Pigeon and Beartooth Development Regulatory File and BHP Socio Economic Annual Reports, Ekati Diamond Mine (Chris Mills, 1997 to 2000)
1 April 2000Report
This composite document contains two reports: (1) Chris Mills' technical review of BHP Diamonds' wastewater and tailings management for the NWT Diamonds Project, highlighting concerns about tailings characterization, turbidity discharge compliance, and acid neutralization potential; and (2) the 1999 Annual Report on Community Health and Well Being for BHP's point-of-hire communities, presenting socioeconomic monitoring data on employment, health outcomes, and social indicators for communities affected by the Ekati Mine development.
Wastewater Waste Rock Water Quality
Waste Rock & Ore Storage Management Plan and Wastewater & Processed Kimberlite Management Plan, Ekati Diamond Mine (BHP Billiton, February 2000)
1 February 2000Report
This document is the Waste Rock and Ore Storage Management Plan for the Ekati Diamond Mine, detailing the characterization, geochemical testing, and management strategies for mine waste rock, ore storage, and drainage from four kimberlite pipes (Panda, Koala, Misery, and Fox) scheduled for sequential mining between 1997 and 2014. The plan includes rock type geology, results of geochemical testing, water quality predictions, waste management strategies, and monitoring protocols required under the Type A Water Licence.
Waste Rock Acid Rock Drainage Geochemistry
Waste Rock Storage Area Seepage Survey, Ekati Diamond Mine (BHP Billiton, November 1999)
1999Report
BHP Diamonds Inc. 1999 Waste Rock Area Seepage Survey transmittal letter (November 17 1999) and report to Gordon Wray, Chairman, NWT Water Board (Yellowknife). File reference 1616. Discusses the Panda waste rock pile drainage into Beartooth Lake, pH-6.0 trigger threshold for initiating seepage controls, and includes ETL EnviroTest (Edmonton/Calgary) Chain of Custody analytical reports with chemistry results for seepage samples.
Waste Rock Water Quality Monitoring Geochemistry
Petrographic Analysis, Tailings & Backfill Samples (Norecol, Dames & Moore, November 1999)
1 November 1999Report
Petrographic and scanning electron microscopy analysis of tailings and backfill samples from a mining operation, documenting mineral composition, texture, sulfide assemblages, and grain size distributions.
Waste Rock Geochemistry Acid Rock Drainage Kimberlite Tailings Monitoring
Operational Material Characterization and Monitoring of Weathering at Huckleberry (Huckleberry Mines Ltd., October 1999)
27 October 1999Presentation
Huckleberry Mines Ltd. presents operational material characterization and weathering monitoring procedures for their porphyry copper deposit, including ARD assessment of waste rock types, daily digging plans based on NPR and copper grade classification, and integrated water quality and materials handling monitoring protocols.
Waste Rock Acid Rock Drainage Geochemistry Development Plans
Waste Rock Storage Area Seepage Survey Correspondence, Ekati Diamond Mine (MVLWB, October 1999 to June 2002)
1999Report
2001 Rock Storage Area Seepage and Waste Rock Survey Report binder for the Ekati Diamond Mine (BHP Billiton). Includes correspondence with the Mackenzie Valley Land and Water Board (MVLWB — Laurie Cordell, Melody MacLeod), BHPB responses (Jim Millard, David Scott, Brent Murphy), 2001 Aquatic Effects Monitoring Program refinements, Panda and Misery seepage monitoring station maps and locations (SEEP-001 through SEEP-083 — Cujo Lake, Thinner Lake, King Pond Dam, Beartooth Lake, Bearclaw Lake, Beartooth waste rock storage area, Coarse Kimberlite Storage Area), and recommendations for granite vs. kimberlite seepage monitoring frequency.
Waste Rock Geochemistry Monitoring
Review of Cover Design Technologies for the Reclamation of Tailings (G. Ward Wilson, University of Saskatchewan, 1999)
~1999Report
Approximate date — inferred from filename
This technical paper reviews cover design technologies for tailings reclamation across four distinct climate regimes (arid, temperate, high rainfall, and tropical monsoon) using numerical soil-atmosphere modeling. The analysis demonstrates that no single cover system design is universally applicable and that climate parameters, soil properties, and site-specific conditions must be integrated to achieve effective tailings containment and oxidation prevention.
Closure & Reclamation Waste Rock Acid Rock Drainage Kimberlite Tailings
Guidelines for Metal Leaching and Acid Rock Drainage (ML/ARD) at Minesites in British Columbia (BC Ministry of Energy and Mines, August 1998)
1 August 1998Report
British Columbia Ministry of Energy and Mines guidelines for predicting, preventing, and mitigating metal leaching and acid rock drainage (ML/ARD) at minesites, establishing a phased approach to characterization, prediction, and mitigation strategies including underwater storage, blending, covers, and drainage treatment.
Acid Rock Drainage Waste Rock Geochemistry
Guidelines for Metal Leaching and Acid Rock Drainage at Minesites in British Columbia (BC Ministry of Energy and Mines, August 1998)
1 August 1998Report
British Columbia Ministry of Energy and Mines guidelines document providing comprehensive requirements and best practices for predicting, preventing, and mitigating metal leaching and acid rock drainage at mining sites, including prediction methodologies, mitigation strategies, and regulatory frameworks.
Acid Rock Drainage Waste Rock Geochemistry
Waste Rock & Ore Storage Management Plan, Ekati Diamond Mine, Revision 2 (BHP Billiton, July 1998)
31 July 1998Report
BHP Diamonds Inc. submitted a Waste Rock and Ore Storage Management Plan for the Ekati Diamond Mine detailing geochemical characterization, testing methodologies, water quality predictions, and mitigation strategies for managing drainage from waste rock and ore storage facilities at four kimberlite pipes (Panda, Koala, Misery, and Fox) in the Northwest Territories.
Waste Rock Acid Rock Drainage Geochemistry
CARC Correspondence & Materials on the BHP EARP Panel Review, Ekati Diamond Mine (BHP Billiton, 1996 to 1997)
31 July 1998Report
BHP Diamonds Inc.'s comprehensive Waste Rock and Ore Storage Management Plan (Revision 2, July 31, 1998) for the Ekati Diamond Mine details geochemical sampling methodology, predictive and operational testing programs, and environmental monitoring protocols to assess acid rock drainage potential and ensure compliance with regulatory requirements. The document also includes critical commentary from the Canadian Arctic Resources Committee (CARC) on the environmental review process, identifying procedural deficiencies, financial resource constraints, and recommending conditions for project approval including Impact and Benefit Agreements, independent monitoring committees, and enhanced regulatory oversight.
Waste Rock Acid Rock Drainage Geochemistry Monitoring
Policy for Metal Leaching and Acid Rock Drainage at Minesites in British Columbia (BC Ministry of Energy and Mines & Ministry of Environment, Lands and Parks, July 1998)
1 July 1998Report
This British Columbia policy establishes regulatory requirements and guiding principles for managing metal leaching and acid rock drainage (ML/ARD) at minesites. It prescribes a three-step prediction and mitigation process and outlines various strategies including avoidance, underwater storage, covers, blending, and drainage collection and treatment.
Acid Rock Drainage Waste Rock Geochemistry
Technical Review of Acid/Alkaline Rock Drainage (ARD) and Geochemical Characterization Program and Waste Rock and Ore Storage Management Plan, Ekati Diamond Mine (Chris Mills, March 1998)
8 March 1998Report
Chris Mills provides a technical review of BHP Diamonds Inc.'s Acid/Alkaline Rock Drainage (ARD) and Geochemical Characterization Program and Waste Rock and Ore Storage Management Plan for the Ekati Diamond Mine. The review identifies critical uncertainties regarding the realizable neutralizing potential of kimberlitic materials proposed for blending with potentially acid-generating waste rock, particularly Misery Schist and Fox Diabase, and recommends additional quantitative mineralogical studies to resolve these uncertainties before final waste rock dump design.
Acid Rock Drainage Waste Rock Geochemistry Monitoring
Waste Rock Management Plans, Fox & Misery Pipes, Ekati Diamond Mine (BHP Billiton, 1998 to 2003)
1998–2003Report
Waste Rock Management Plans binder for the Ekati Diamond Mine (BHP Billiton Diamonds Inc.) covering 2000–2006. Includes Kevin Morin (Day, 2003) analysis of acid rock drainage (ARD) prediction problems at Ekati, Sexsmith / Milnes ARD reviews, Agency (Independent Environmental Monitoring Agency) reviews of Waste Rock and Ore Storage Management plans (Red Pederson, Melody McLeod, Gordon Wray correspondence), MVLWB correspondence on Operating Environmental Management Plan support documents, BHP Billiton diamond drill logs (FGT-07 — biotite granite, plagioclase, K-alteration), EBA Engineering Consultants 1997 tailings size-distribution data (Gaudin-Schuhmann), and proposed Misery, Panda/Koala, North/South/East waste rock dump configurations on Lac de Gras.
Acid Rock Drainage Waste Rock Geochemistry
Acid Rock Drainage and Geochemical Characterization Program, Ekati Diamond Mine (Dames & Moore, December 1997)
31 December 1997Report
This final geochemical characterization report for BHP Diamonds' proposed diamond mine in the Northwest Territories evaluates the acid/alkaline rock drainage potential of waste rock, ore (kimberlite), and tailings through static and kinetic testing methods. The study predicts water quality from mine facilities including waste rock dumps, pits, underground workings, ore stockpiles, and tailings, identifying the Misery Schist Waste Rock Dump as a potential source of acidic drainage with elevated metal concentrations, while most other facilities are expected to remain benign.
Acid Rock Drainage Waste Rock Geochemistry
Waste Rock and Ore Storage Management Plan, NWT Diamonds Project (BHP Billiton, December 1997)
30 December 1997Report
BHP Diamonds Inc. submits a comprehensive Waste Rock and Ore Storage Management Plan for the Ekati Diamond Mine in the Northwest Territories, detailing the geochemical characterization of rock types from five kimberlite pipes (Panda, Koala, Misery, Fox, and Leslie), acid/alkaline rock drainage potential, and management strategies for waste disposal over the mine's operational life and closure.
Acid Rock Drainage Waste Rock Geochemistry
Guidelines and Recommended Methods for the Prediction of Metal Leaching and Acid Rock Drainage at Minesites in British Columbia (BC Ministry of Employment and Investment, 1997)
~1997Report
Approximate date — inferred from filename
This draft technical manual provides comprehensive guidelines and recommended methods for predicting metal leaching and acid rock drainage (ARD) at minesites in British Columbia, including static and kinetic testing procedures, data interpretation frameworks, and prediction methodologies for various mine components and exposure conditions.
Acid Rock Drainage Waste Rock Geochemistry Monitoring
Guidelines and Recommended Methods for the Prediction of Metal Leaching and Acid Rock Drainage at Minesites in British Columbia (BC Ministry of Employment and Investment, 1997)
~1997Report
Approximate date — inferred from filename
A comprehensive technical manual providing guidelines and recommended methods for predicting metal leaching and acid rock drainage (ARD) at minesites in British Columbia, addressing static and kinetic testing procedures, data interpretation, and mitigation strategies for mining operations.
Acid Rock Drainage Waste Rock Geochemistry Development Plans
Technical Advisory Committee Meeting, Type A Water Licence Application N7L2-1616, Ekati Diamond Mine (BHP Billiton, October 1996)
8 October 1996Meeting Minutes
Technical Advisory Committee meeting on BHP Diamonds Inc.'s Type A Water Licence Application for the Ekati Diamond Mine, held October 8-9, 1996 in Yellowknife. The meeting focused on comprehensive technical review of tailings management, frozen core dam design, water balance, acid rock drainage management, effluent quality, and abandonment/restoration plans.
Regulatory Water Licence Waste Rock
Acid Rock Drainage (ARD) Case Study, Snip Mine, 1990 to 1999 (BHP Billiton, 1990 to 1999)
11 July 1996Report
This case study documents Snip Mine's (1990–1999) tailings and underground workings closure strategy, focusing on mitigation of acid rock drainage and metal leaching through impoundment management, bulkheading, and long-term monitoring, with lessons applied to other British Columbia mining operations.
Closure & Reclamation Waste Rock Acid Rock Drainage Post-Closure Monitoring

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