Find documents by name, keyword, or question across the IEMA Ekati archive.
BHP Diamonds Inc.'s No Net Loss Plan quantifies fish habitat losses from Misery Pit development at Desperation and Carrie Ponds (0.587 weighted habitat units) and proposes habitat compensation through enhancement projects at other lakes and streams to achieve net gain in productive fish habitat capacity in compliance with federal Fisheries Act and DFO policy.
BHP Diamonds Inc. submitted a Mining Industry Questionnaire for Water Licence Applications to the Mackenzie Valley Land and Water Board in August 2001, providing supplemental information in support of their application for water licensing of the proposed Beartooth, Pigeon, and Sable kimberlite pipe developments at the Ekati Diamond Mine. The questionnaire details mine operations, geology, water usage, dewatering plans, tailings management, and environmental monitoring for the three new pit developments, which would extend the mine life by approximately three years.
A lecture on metal leaching and acid rock drainage prevention, mitigation, and reclamation strategies delivered by Ron Nicholson covering oxidation processes in sulphide minerals, disposal methods (underwater and engineered covers), treatment options, and site-specific considerations for permafrost, arid, and saline environments.
This document is a Terms of Reference review with technical responses and recommendations from various regulatory agencies and stakeholders regarding BHP Diamonds Inc.'s proposed expansion of the Ekati Diamond Mine involving three new kimberlite pipes (Sable, Pigeon, and Koala). The review addresses consultation requirements, environmental assessment scope, closure and reclamation planning, hazardous materials handling, and cumulative watershed impacts.
A five-day course outline on metal leaching and acid rock drainage assessment, prediction, and mitigation strategies for mining operations, delivered by North West Community College in August 2001. The course covers material characterization, field assessment, case studies of operating and closed mines in British Columbia, and decision-making frameworks for managing ML/ARD risks at mine sites.
BHP Diamonds Inc. 2001 Spring Waste Rock Storage Area Seepage Survey for the EKATI Diamond Mine, submitted August 29 2001 to Melody MacLeod, Mackenzie Valley Land and Water Board, under Water Licence N7L2-1616 (Part F, Section 3(b)), Report No. 1CB009.04. Discusses Acid Rock Drainage (ARD) indicators including elevated sulphate (>30 mg/L) and pH<6, stagnant site drainage and stratification, wind-blown dust contamination near waste rock piles, bioassay-test water-chemistry evaluation, frequency of equipment malfunctions in field measurements (pH, conductivity, flow), and recommendations for early-winter visual inspection of waste-rock pile venting/hot-air signatures of ARD heat generation.
Glenda Ferris presents a framework for community engagement in mine development planning, emphasizing the need for transparent consultation on acid rock drainage risks, technical capacity building, and equitable inclusion of all community members—including First Nations—throughout mine conception, operation, and post-closure phases.
BHP Diamonds Inc. submitted this supporting document to the Mackenzie Valley Land and Water Board for regulatory permits to develop three additional kimberlite pipes (Sable, Pigeon, and Beartooth) at the Ekati Diamond Mine in the Northwest Territories. The document describes the proposed open pit mining methods, waste rock and water management strategies, infrastructure requirements, and abandonment/restoration plans for each pipe, building upon the existing regulatory framework and environmental agreements already in place for the mine.
Dissolved Solids Toxicity reference binder transmitted via fax by Dennis Trotter (Mackenzie Valley Land and Water Board) to Karl Lauten. Includes McCulloch, Goodfellow & Black (1993) "Characterization, Identification and Confirmation of Total Dissolved Solids as Effluent Toxicants" and J.B. LeBlond, L.K. Duffy (2001) "The Science of the Total Environment" study on Fort Knox tailings pond samples using Microtox and algal bioassays, with Red Dog mine station 140 sample precision data and Camo AS Trondheim chemometric modelling references. Topics: TDS toxicity, EC20, Microtox toxicity test system.
Water quality monitoring data from Huckleberry Mines Ltd. (Ekati Diamond Mine) covering multiple sampling locations from 1997 to 2001, including physicochemical parameters, toxicity tests, and dissolved/total metal concentrations tracked across tailings pond, pit, ditch, and creek locations.
A presentation on metal leaching and acid rock drainage prevention, mitigation, and reclamation delivered by Ron Nicholson, covering monitoring approaches (classical and recent environmental effects monitoring), in-situ tailings and waste rock sampling techniques, pore water geochemistry data from July 2000, and contingency planning strategies for managing unexpected environmental failures at mining operations.
Presentation by Ron Nicholson on metal leaching and acid rock drainage prevention, mitigation, and reclamation, delivered at Northwest Community College in August 2001, introducing methodology for quantifying environmental impacts from sulphide mine waste and establishing priorities for mitigation efforts.
This document describes Diavik Diamond Mines Inc.'s Aquatic Effects Monitoring Program (AEMP) for Lac de Gras, Northwest Territories, designed to measure short-term and long-term effects of diamond mine operations on the aquatic ecosystem. The program includes core monitoring of water quality, snow quality, primary and secondary producers, benthic invertebrates, and lake bed sediment chemistry, along with special effects studies on plume delineation and source water toxicity characterization.
Huckleberry Mines Ltd. (Smithers BC) quarterly report to Wally Bergen, Regional Manager, Ministry of Energy and Mines, July 19 2001. Q2 2001 mill throughput 1,885 tonnes/day. Includes Acid-Base Accounting (ABA) data for tailings and waste rock from Tailings Management Facility (TMF-2 downstream Granodiorite samples, Net-Acid-Generation NAG fines testing), Blast Sample geochemistry (Total Sulfur %, Sulfate %, Sulfide %, AP/NP/NPR/NNP, TIC %), and exposed waste rock pH monitoring June 2001 at East Zone Pit haul road (hornfelsed andesite with pyrite, chalcopyrite, molybdenite, gypsum). Reference example for IEMA on ARD reporting.
A comprehensive literature review documenting the life history characteristics and lacustrine habitat requirements of 45 freshwater fish species occurring in the Northwest Territories and Nunavut, with detailed information on spawning, young-of-the-year, juvenile, and adult habitat preferences across four life stages for 36 species. The report identifies substantial data gaps in the understanding of northern freshwater fish habitat requirements and recommends further studies.
This security review report evaluates the financial and environmental requirements for reclamation and long-term management of the closed Equity Silver Mine in British Columbia, calculating a net present value liability of $23.55 million based on projected lime treatment costs, operating expenses, and periodic maintenance through 2070. The review establishes operational protocols for acid rock drainage treatment, cost triggers for security adjustments, and monitoring requirements to manage environmental risks including contaminated drainage and aquatic ecosystem impacts.
This document is an informational brochure explaining the Nunavut Impact Review Board's environmental assessment process, including screening procedures, public participation mechanisms, and criteria for determining when full reviews are required for project proposals in the Nunavut Settlement Area.
BHP Diamonds Inc. water surveillance program monthly report for May 2001 submitted to the Mackenzie Valley Land and Water Board in compliance with water licence N7L2-1616, containing water sampling results, flow and volume measurements for various lakes and facilities, waste rock production data, and weather data from the mine site.
Correspondence binder June – December 2001 for the Independent Environmental Monitoring Agency (IEMA, Yellowknife). Includes BHP Diamonds Inc. Water Surveillance Program Monthly Report for November 2001 (under Water Licence N7L2-1616) to MVLWB, Workplace Plus Ltd. office invoices, Environment Canada Northern Division Environmental Protection Branch (Yellowknife) commentary supporting wastewater-treatment innovations but flagging outstanding questions on the proposed Misery Land Treatment operation scale, DFO position (current Fish Habitat Destruction conviction under appeal — proposal not considered at this time), and caribou maps/placename project (Gerry / Vivian, March-May 2001 review iterations).
Komex International prepared a reclamation liability estimate for the Ekati Diamond Mine comparing current liability costs (approximately $50.8 million) with ultimate closure costs (approximately $136.4 million) across multiple mine components including open pits, tailings cells, waste rock piles, and camp facilities, using the RECLAIM model and incorporating site-specific data and professional judgment.