Post-Closure Monitoring

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RECLAIM 8 User Manual, Mine Closure and Reclamation Cost Estimation Tool (Crown-Indigenous Relations and Northern Affairs Canada, June 2025)
16 June 2025Report
RECLAIM 8.0 is a user manual for a Microsoft Excel-based cost estimation tool developed by CIRNAC and GNWT to calculate closure and reclamation cost estimates for mines and advanced mineral exploration projects in the Northwest Territories and Nunavut. The manual provides guidance on estimating direct and indirect costs associated with mine closure activities, including water treatment, waste management, interim care and maintenance, and post-closure monitoring.
Closure & Reclamation Closure Plan Post-Closure Monitoring Wastewater Regulatory
Comments on Interim Closure and Reclamation Plan (ICRP) Version 3.1, Ekati Diamond Mine (Independent Environmental Monitoring Agency, November 2023)
29 November 2023Letter
The Independent Environmental Monitoring Agency provides detailed comments and recommendations on Arctic Canadian Diamond Mine Ltd's Interim Closure and Reclamation Plan Version 3.1 (ICRP v3.1) for the Ekati Diamond Mine, addressing closure principles, long-term liability estimates, water quality criteria, waste rock management, pit lake reclamation, financial security, and adaptive management frameworks.
Closure & Reclamation Correspondence Post-Closure Monitoring
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
Interim Closure and Reclamation Plan (ICRP) Regulatory Case File, Ekati Diamond Mine (WLWB, 2006 to 2009)
3 February 2009Report
A collection of documents from January-February 2009 regarding BHP Billiton's Interim Closure and Reclamation Plan (ICRP) for Ekati Diamond Mine, including the working group meeting agenda for February 3-4, 2009, and detailed comments from regulators, environmental monitors, and Indigenous communities on closure objectives, reclamation research, wildlife habitat, and post-closure monitoring.
Closure & Reclamation Closure Plan Post-Closure Monitoring
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
Interim Closure and Reclamation Plan (ICRP) Volume 1 - Draft, Ekati Diamond Mine (BHP Billiton, January 2007)
1 January 2007Report
This interim closure and reclamation plan for the Ekati Diamond Mine outlines BHP Billiton's objectives, methods, and timeline for closing and reclaiming the mine site, with operations anticipated to continue until 2020 and post-closure monitoring extending to approximately 2054. The plan addresses six major mine components—open pits, underground mines, waste rock storage areas, processed kimberlite containment facilities, dams/dykes/channels, and buildings/infrastructure—detailing pre-disturbance conditions, closure criteria, engineering approaches, risks, research needs, and monitoring programs.
Closure & Reclamation Closure Plan Post-Closure Monitoring Traditional Knowledge
Agency Ekati Closure and Reclamation Workshop (IEMA, February 2006)
2006Report
Independent Environmental Monitoring Agency (IEMA) Ekati Closure and Reclamation Workshop, IEMA Boardroom, February 14-16 2006 — workshop agenda, materials and Draft NWT Mine Site Reclamation Guidelines. Sessions cover Mine Component 1 and 2 objectives, options and criteria for further development of Agency advice to BHPB. Includes Mackenzie Valley Land and Water Board (MVLWB) standard licence template Surveillance Network Program text, closure-and-reclamation plan revision/approval timing (six months after Board notification), and reclamation guidance for Aboriginal/Federal/Territorial governments, land owners, communities, regulatory authorities and mining proponents.
Closure & Reclamation Closure Plan Board Meetings Post-Closure Monitoring Waste Rock
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
Mine Site Reclamation Policy for the Northwest Territories (DIAND, 2002)
~2002Report
Approximate date — inferred from filename
This 2002 policy document establishes federal standards and principles for mine site reclamation in the Northwest Territories, addressing environmental protection, closure planning, financial security requirements, and the allocation of reclamation liability between mining operators and the Crown. It sets out mandatory elements for closure and reclamation plans, financial assurance mechanisms, and regulatory coordination to ensure sustainable mining development and reduce long-term government environmental liability.
Closure & Reclamation Closure Plan Regulatory Water Quality
Reclamation Liability Estimate, Appendices, Ekati Diamond Mine (Komex, May 2001)
18 May 2001Report
Komex International provides a comprehensive reclamation liability estimate for BHP Diamonds' Ekati Diamond Mine closure, detailing assumptions and cost models for decommissioning, contaminated site remediation, pit flooding, post-closure monitoring programs, and site restoration activities across multiple operational areas and facilities.
Closure & Reclamation Closure Plan Waste Rock Geochemistry
Interim Abandonment and Restoration Plan, Ekati Diamond Mine (BHP Billiton, February 2000)
1 February 2000Report
This interim abandonment and restoration plan describes BHP's strategy for reclaiming disturbed areas at the Ekati Diamond Mine following the mining of four kimberlite pipes (Panda, Koala, Fox, and Misery) over a projected 15-year operational period. The plan details reclamation approaches for open pits, underground facilities, tailings containment areas, waste rock storage, water management structures, quarries, roads, and other infrastructure, emphasizing stable landforms, water resource protection, and facilitation of natural recovery through progressive reclamation, revegetation research, and post-closure monitoring.
Closure & Reclamation Closure Plan Revegetation
Reclamation Cost Estimate for Closure in 1999, Ekati Diamond Mine (BHP Billiton, March 1999)
4 March 1999Report
This document provides a detailed reclamation cost estimate for the Ekati Diamond Mine assuming closure in 1999, broken down by reclamation unit (Panda Pit, Panda Waste Dump, Long Lake Containment Area, Buildings and Facilities, and Chemicals/Contaminated Soils), with a total estimated closure cost of $6,671,716 including 10 years of post-closure monitoring.
Closure & Reclamation Closure Plan Post-Closure Monitoring Development Plans
Interim Abandonment and Restoration Plan, NWT Diamonds Project (BHP Billiton, September 1997)
30 September 1997Report
BHP Diamonds Inc. submitted an Interim Abandonment and Restoration Plan for the NWT Diamonds Project on September 30, 1997, detailing comprehensive reclamation strategies for five kimberlite pipes (Panda, Koala, Fox, Leslie, and Misery) over a projected 25-year mine life, including methods for stabilizing open pits, managing tailings, storing waste rock, and restoring vegetation and water resources.
Closure & Reclamation Closure Plan Revegetation
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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