Find documents by name, keyword, or question across the IEMA Ekati archive.
A case study examining drainage treatment and mitigation strategies at the Samatosum mine, detailing measures to limit leaching from waste rock dumps and tailings, including costs and long-term monitoring requirements for managing acid rock drainage and sludge disposal.
Curriculum vitae of David William Schindler, a renowned limnologist and ecologist documenting his education, scientific employment, awards, committee memberships, and extensive publications (1962-1996 and in press) primarily focused on experimental lake studies, acidification, eutrophication, and aquatic ecosystem responses to environmental stressors.
This 1995 baseline bird survey report documents the distribution, abundance, and habitat use of 60 bird species (including 37 confirmed breeders) across the 1,900 km² NWT Diamonds Project study area around Lac de Gras. Nearly 19,000 birds were recorded during aerial and ground surveys from May to October 1995, with notable findings including over 10,000 geese during spring migration, 37 waterfowl breeding pairs, and 19 occupied raptor territories.
This response to a BHP Review Panel request presents worst-case air quality dispersion modelling results for nitrogen dioxide, sulphur dioxide, and total suspended particulates at the Ekati Diamond Mine for years 2000 and 2006, demonstrating that predicted concentrations remain below or at Canadian Ambient Air Quality Objectives. The document details revised emission factors, meteorological data, mixing heights, and proposes monitoring programs including lichen biomonitoring to verify model predictions and detect impacts on local flora.
This tailings management plan for the BHP Diamonds Project describes the design and operation of a 133-million-tonne tailings disposal system using Long Lake basin in the Northwest Territories, including perimeter dams, intermediate dykes, water management strategies, and long-term reclamation to restore the site to a wetland environment.
This document establishes the terms of reference for the West Kitikmeot / Slave Study, approved December 14, 1995, which aims to collect environmental and socioeconomic information to support informed resource management decisions and assess cumulative effects of development in the region. The study is governed by a consensus-based Management Board representing aboriginal organizations, industry, environmental groups, and government, with research coordinated from a Study Office in Yellowknife.
BHP's response to the Environmental Assessment Panel's request for additional information on emergency response and contingency plans for the NWT Diamonds Project, particularly addressing spill response procedures for the Echo Bay Winter Road and mine operations, including historical spill data, equipment inventories, personnel training requirements, and detailed response protocols for various environmental media.
This 1995 baseline study documents eskers, carnivore distributions, and grizzly bear habitat use in the Lac de Gras area for the NWT Diamonds Project. Twenty-three grizzly bears were radio-collared to track movements and habitat preferences, while ground surveys identified 75 carnivore dens across major eskers and assessed food habits and ecosystem use.
This document is BHP Billiton's December 1995 response to the panel's request for additional information on monitoring programs for the NWT Diamonds Project (Ekati), detailing adaptive management criteria, thresholds, and monitoring sensitivity for water, land, air, wildlife, and socioeconomic parameters, along with establishing an independent Environmental Advisory Group. The second section (dated March 2004) presents Rescan Environmental Services' proposal to update the EKATI air dispersion model using ISC3, incorporating current meteorological data, terrain, emissions inventories, and cumulative effects assessment with the Diavik mine.
BHP Diamonds Inc.'s 1995 baseline study update on meteorology, hydrology, and water quality for the NWT Diamonds Project (Ekati) documents continued monitoring showing 40% higher precipitation than 1994, elevated surface water flows approaching 1-in-100 year event levels, and localized water quality impacts in Kodiak Lake from the Panda Lake Diversion Channel construction, while downstream water quality at Slipper Lake outlet remained unchanged.
This 1995 baseline study documents eskers, carnivores (foxes, wolves, wolverines), and grizzly bears in the Lac de Gras area of the NWT Diamonds Project. The report presents results from extensive field surveys including 75 total carnivore dens located, 23 collared grizzly bears tracked to determine habitat use and movement patterns, and analysis of carnivore food habits and important denning habitats for wildlife management and impact assessment.
This 1995 baseline study update reports meteorological, hydrological, and water quality monitoring for the NWT Diamonds Project (Ekati Mine) in the Koala/Long Lake watershed. The year was characterized by significantly higher precipitation (40% above 1994 and baseline estimates), resulting in elevated streamflows and lake levels that approached 1-in-100-year flood event magnitudes, with observed peak flows correlating well with regional historical data; water quality analysis showed localized effects in Kodiak Lake and elevated metals in the Panda Diversion Channel, though no significant changes were observed in Slipper Lake, the watershed outlet.
This 1995 baseline study documents the occurrence, movements, and distribution of caribou within the Lac de Gras area (1,900 km²) during spring, summer, and fall migration periods, with aerial survey data collected to establish pre-development baseline conditions for the proposed NWT Diamonds project. The study tracks caribou use of major travel corridors including the north shore of Lac de Gras and esker systems, identifies seasonal habitat preferences, and notes the absence of calving and rutting behavior within the study area during the monitoring period.
This document responds to a panel's request for additional information on baseline ground water data and monitoring plans for the proposed BHP Diamond Mine at Lac de Gras. The proponent describes low predicted groundwater inflows based on permafrost presence and low hydraulic conductivity of granite bedrock, with plans for periodic monitoring of actual pit dewatering rates rather than a comprehensive regional monitoring program.
BHP Diamonds Inc. submitted a 1995 baseline study update on fisheries and aquatic life in the Koala watershed for the proposed Ekati Diamond Mine project. The report presents results of sampling periphyton, benthic invertebrates, zooplankton, and fish populations from four long-term monitoring lakes (Vulture, Kodiak, Nema, and Slipper) and associated streams to establish baseline environmental conditions against which future mining impacts will be measured.
This document is the proponent's detailed response to regulatory panel requests for information on environmental and socioeconomic monitoring programs for the NWT Diamonds Project. It outlines comprehensive monitoring plans for water quality, wildlife, air, land, permafrost, and socioeconomic parameters; describes the establishment of an independent Environmental Advisory Group; and addresses post-closure monitoring commitments and adaptive management thresholds.
This 1995 baseline fisheries and aquatic life study documents environmental conditions in the Koala watershed near the proposed Ekati Diamond Mine, establishing baseline data for long-term monitoring of four designated lakes (Vulture, Kodiak, Nema, Slipper) and associated streams. The report presents results of sampling periphyton, larval drift, benthic invertebrates, zooplankton, and fisheries data collected to assess potential mining impacts on aquatic habitat and biota.
EBA Engineering Consultants prepared preliminary designs for tailings dams and associated earthworks at the NWT Diamonds Project located 300 km northeast of Yellowknife, featuring four perimeter dams around Long Lake using frozen core technology to retain water and tailings, with extensive thermal and stability analyses to ensure permafrost integrity over a 25-year operational period.
This 1995 baseline study documents caribou occurrence, movements, and distribution within the Lac de Gras study area (1,900 km²) from spring through fall migration, providing baseline data prior to diamond mine development. Aerial surveys tracked caribou using major migration corridors along the north shore of Lac de Gras and esker systems, with spring migration involving primarily cows in groups of 11–50 individuals, sparse summer presence, and concentrated late summer and fall populations using wetlands.
BHP Diamonds Inc. conducted a 1995 baseline small mammal inventory and habitat assessment at the NWT Diamonds Project area near Lac de Gras from August 14 to September 12, 1995, trapping 175 specimens across seven traplines and identifying three microtine species with habitat associations and relative abundance data.