Preliminary Remedial Action and Risk Management Plan for Gordon Lake Mine Sites, Gordon Lake, Northwest Territories
Prepared for: Public Works and Government Services Canada Public Works and Government Services Canada
Prepared by: Stantec Consulting Ltd., 102 - 40 Highfield Park Drive, Dartmouth NS B3A 0A3
February 23,2015
Revision Record Revision Description Prepared By Checked By Approved By 1 Draft P.Coyne P.C D.Wilson DW M.Doucet MD
PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
Executive Summary
Stantec Consulting Ltd. (Stantec) was retained by Public Works and Government Services Canada (PWGSC) – Northern Contaminated Sites Group to prepare a Preliminary Remedial Action Plan (RAP) for the remediation of nine former mine sites on or near Gordon Lake in the Northwest Territories (herein referred to as the Project).
The following preliminary RAP is based on the findings of previous assessment programs completed at each of the sites and on the results of the remedial options analyses (ROA) completed by Stantec. In addition, the RAP incorporates the revised impacted soil volumes calculated during completion of the human health and ecological risk assessment (HHERA).
The remedial options that have been recommended for the wastes at each of the sites are presented below:
• Physical Hazards: − Install engineered caps over the shafts and deep trenches − Backfill shallow trenches with waste rock − Slope mounds or other stockpiled material to match the surrounding topography − Remove physical hazards from water, if present • Non-hazardous Waste: − Consolidate wood waste and burn on-site − Consolidate, transport and dispose of the non-hazardous waste at the NHW Landfill to be constructed at the Camlaren site. • Hazardous Waste: − Asbsetos containing materials (ACMs): Consolidate and dispose off-site at the NHW Landfill to be constructed at the Camlaren site. − All other hazardous waste: Consolidate and dispose off-site at an approved disposal facility. • PHC and/or Metal Impacted Soil and Tailings: − Excavate, transport and dispose of the impacted soil and/or tailings at the NHW Landfill to be constructed at the Camlaren site. • Waste Rock − Potentially acid generating (PAG) waste rock / ore: Cap in place or excavate and dispose at a centralized location. − Non-PAG waste rock / ore: Grade and utilize as backfill when addressing physical hazards. • Water: − Treat in an on-site modular water treatment system tailored to specific contaminants of concern (CoCs).
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Upon further evaluation of the remedial options available for sediment, Stantec has determined that the remedial option presented for sediment in the ROA required revision. The sediment impacts present at the sites were determined to pose little to no risk to the environment. As such, Stantec has recommended that impacted sediment remains in place.
This preliminary RAP is limited by the findings of the previous assessment programs and will require revision upon the collection of additional data (i.e. from the 2015 assessment program).
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Table of Contents
EXECUTIVE SUMMARY ...... I
1.0 INTRODUCTION ...... 1
2.0 SCOPE OF WORK ...... 1
3.0 BACKGROUND ...... 2 3.1 SITES AND AREA DESCRIPTION ...... 2 3.1.1 Overview of the Biophysical Conditions...... 4 3.2 SITE HISTORY ...... 4 3.2.1 Camlaren Mine (SM205) ...... 4 3.2.2 Burnt Island (SM320) ...... 5 3.2.3 Goodrock Mine (SM466)...... 5 3.2.4 Kidney Pond Mine (SM474) ...... 5 3.2.5 Murray Lake (SM490) ...... 6 3.2.6 Storm Property (SM483) ...... 6 3.2.7 Treacy Mine (SM475) ...... 6 3.2.8 Try Me (SM488) ...... 7 3.2.9 West Bay Mine (SM302) ...... 7 3.3 PREVIOUS STUDIES ...... 7 3.3.1 Remedial Options Analysis ...... 9 3.3.2 Human Health and Ecological Risk Assessment ...... 11 3.4 SEDIMENT ...... 13
4.0 REGULATORY CONSIDERATIONS ...... 13 4.1 CANADIAN ENVIRONMENTAL QUALITY GUIDELINES ...... 14 4.2 FCSAP DECISION-MAKING FRAMEWORK ...... 15 4.2.1 Risk Management...... 15
5.0 INTEGRATED REMEDIAL/RISK ACTION PLAN ...... 16 5.1 RISK ASSESSMENT RESULTS ...... 16 5.2 NON-HAZARDOUS WASTE ...... 18 5.2.1 Wood Waste ...... 18 5.2.2 Other Non-Hazardous Waste ...... 18 5.3 HAZARDOUS WASTE ...... 19 5.3.1 Asbestos Containing Materials ...... 19 5.3.2 Lead Based Paint Materials ...... 19 5.3.3 Liquid Organic Waste ...... 19 5.4 SOIL, SEDIMENT AND TAILINGS ...... 19 5.4.1 Soil and Tailings ...... 20 5.5 WASTE ROCK ...... 21 5.5.1 Non-PAG Waste Rock ...... 21 5.6 WATER...... 21 () Stantec
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5.7 PHYSICAL HAZARDS ...... 22
6.0 GEOTECHNICAL CONSIDERATIONS ...... 22 6.1 SITE ACCESS ...... 22 6.2 BORROW SOURCES ...... 23
7.0 CONCEPTUAL REMEDIAL DESIGN ...... 24 7.1 REGULATORY APPROVALS ...... 24 7.1.1 Stakeholder / Community Meetings ...... 24 7.2 BORROW MATERIAL STAGING ...... 24 7.3 WASTE STAGING AREA ...... 25 7.4 NON-HAZARDOUS WASTE LANDFILL ...... 25 7.4.2 Water Treatment System ...... 26 7.4.3 Waste Rock Cover System ...... 26
8.0 SITE REQUIREMENTS FOR REMEDIATION ...... 26 8.1.1 Camp ...... 26 8.1.2 Equipment ...... 27 8.1.3 Fuel ...... 27
9.0 ADDITIONAL ACTIVITIES ...... 27 9.1 PRE-REMEDIAL ACTIVITIES ...... 27 9.2 CONFIRMATORY ACTIVITIES DURING REMEDIATION ...... 28 9.3 POST REMEDIAL ACTIVITIES ...... 28
10.0 SCHEDULE ...... 29
11.0 REMEDIAL PLANNING STATUS ...... 29
12.0 CLOSURE ...... 30
13.0 STANTEC QUALITY MANAGEMENT ...... 32
14.0 REFERENCES ...... 33
LIST OF APPENDICES
APPENDIX A DRAWINGS
LIST OF TABLES Table 1 Mineral Claims within the Gordon Lake Sites ...... 2 Table 2 Remedial Options Evaluated During the ROA ...... 10 Table 3 Final SSRTs – Gordon Lake Remediation Project ...... 12 Table 4 Summary of Relevant Federal / Territorial Remedial Guidelines ...... 13 Table 5 Summary of Risk Management Standards and Guidelines ...... 15 () Stantec
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Table 6 Summary of Waste Volumes by Site ...... 17 Table 7 Summary of Wood Waste Present at the Sites...... 18 Table 8 Proposed Schedule ...... 29
LIST OF FIGURES
Figure 1 - Site Location Plan ...... 3 Figure A.1-1 – Camlaren Overview Figure A.1-2 – Camlaren Mine Area South –Areas Requiring Remediation Figure A.1-3 – Camlaren Mine Area North –Areas Requiring Remediation Figure A.1-4 – Camlaren North Cabin –Areas Requiring Remediation Figure A.1-5 – Camlaren Soil Zenith Island – Areas Requiring Remediation Figure A.2-1 – Burnt Island Overview Figure A.2-2 – Burnt Island Shaft Area –Areas Requiring Remediation Figure A.2-3 – Burnt Island Waste Rock Area –Areas Requiring Remediation Figure A.2-4 – Old Mill Area –Areas Requiring Remediation Figure A.3-1 – Goodrock Overview Figure A.3-2 – Goodrock Mill Area –Areas Requiring Remediation Figure A.4-1 – Kidney Pond Overview Figure A.4-2 – Kidney Pond 1983 Camp –Areas Requiring Remediation Figure A.4-3 – Kidney Pond Exploration Camp –Areas Requiring Remediation Figure A.4-4 – Kidney Pond Portal Area –Areas Requiring Remediation Figure A.4-5 – Kidney Pond Northwest Portal Area –Areas Requiring Remediation Figure A.4-6 – Kidney Pond Area –Areas Requiring Remediation Figure A.5-1 – Murray Lake Overview Figure A.5-2 – Murray Lake 1938/2008 Camps –Areas Requiring Remediation Figure A.5-3 – Murray Lake Trench Area –Areas Requiring Remediation Figure A.6-1 – Storm Property Overview Figure A.6-2 – Storm Property Shaft Area –Areas Requiring Remediation Figure A.7-1 – Treacy Overview Figure A.7-2 – Treacy Mine Mill Area –Areas Requiring Remediation Figure A.7-3 – Treacy Mine Camp Area –Areas Requiring Remediation Figure A.8-1 – Try Me Overview Figure A.9-1 – West Bay Overview Figure A.9-2 – West Bay North Area –Areas Requiring Remediation Figure A.9-3 – West Bay South Area –Areas Requiring Remediation Figure A.10-1 – Proposed Containment Area Figure A.10-2 – Potential Borrow Sources – West Bay Figure A.10-4 – Proposed Borrow Sources – Burnt Island Figure A.10-6 – Proposed Borrow Sources – Murray Lake
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
1.0 INTRODUCTION
Stantec Consulting Ltd. (Stantec) was retained by Public Works and Government Services Canada – Northern Contaminated Sites Group (PWGSC-NCSG) to prepare a Preliminary Remedial Action Plan (RAP) for the remediation of nine former mine sites on or near Gordon Lake in the Northwest Territories (herein referred to as the Project). The work for this Project is being completed under Contract EW699-121587/001/NCS for environmental services in the Western Region, dictated by the Terms of Reference provided to Stantec on June 2014.
The purpose of this preliminary RAP is to review the existing conditions at each of the nine former mine sites, outline remedial objectives, review potential remedial options, evaluate the advantages / disadvantages of each option, and recommend a remedial option that meets the remedial objectives. In addition, the RAP proposes logistics considerations and includes a preliminary proposed schedule for the remediation. The RAP also outlines conceptual remedial designs for the engineered structures required during the remediation program.
The RAP has been developed considering the existing information available for each of the nine former mine sites including, but not limited to, the findings of previous assessment programs and the subsequent Remedial Options Analysis (ROA) completed in the fall of 2014. This RAP is limited to the information collected during the previous assessment programs and will be updated upon the collection of additional information, which is tentatively scheduled for the summer of 2015.
The Project is being funded through the Federal Contaminated Sites Action Plan (FCSAP) and must be compliant with FCSAP requirements including reporting structures and submission deadlines. 2.0 SCOPE OF WORK
The scope of work for this Project was to develop a preliminary RAP based upon the previous assessment programs and the subsequent ROA completed for the sites in 2014. To satisfy the scope of work, Stantec undertook the following activities:
• Updating of the findings of the ROA based on the findings of the HHERA completed by Stantec. • Evaluation and updating of the selected remedial options (ROs) including the revised remedial management approaches (RMAs) developed. • Evaluation and integration of the ROs and the ROAs into an integrated remedial plan for the Sites. • Preparation of a schedule for the Project.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
3.0 BACKGROUND
3.1 SITES AND AREA DESCRIPTION
The Project includes the remediation of nine former mines (Sites) located on or near Gordon Lake, approximately 75 kilometers (km) northeast of Yellowknife, Northwest Territories (NT) (Figure 1). The Sites are as follows:
• Camlen Mine • Burnt Island Mine • Goodrock Mine • Kidney Pond Mine • Murray Lake • Storm Property • Treacy Mine • Try Me • West Bay Mine
All of the sites are located on Crown land, managed by the federal government. However, three of the sites including Storm Property, Try Me and West Bay are also located within the Akaitcho Land Withdrawal Area, which are subject to on-going negotiations. All of the Sites are currently un-occupied; however, five of the Sites have active mineral claims (outlined in Table 1 below).
Table 1 Mineral Claims within the Gordon Lake Sites
Site Claim # Claim Holder Expiry Date Kidney Pond 3248 Silver Pursuit Resources 2030 Ltd. Camlaren K06900 Lakeland Resources 2018 Murray Lake K03650 Pasinex Resources 2016 Limited Burnt Island 5058 Pasinex Resources 2029 Limited West Bay F33025 Walter Humphries 2016
In addition to the active mineral claims, the Gordon Lake area is also used by hunters and trappers, with a lodge (Sandy Point Lake Lodge) located at the northern end of the lake. In addition, the Tibbitt to Contwoyto Joint Venture winter road extends from the south to north ends of the Lake, which transports equipment from the end of Ingraham Trail (Highway 4) to the mines northeast of Yellowknife. In addition to the commercial truck traffic during the winter months, local residents also use the winter road.
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PREPARED BY: FIGURE NO.: R Sutcliffe 1 Remedial Options Analysis REVIEWED BY: DATE: C Shupe Gordon Lake Mines, Northwest Territories Mar 31, 2014
CLIENT: Public Works Location of Project Mine Sites Government Services Canada
File Path: V:\1214\active\121412xxx\121412952 - Remediation-Gordon Lakes Mine\geomatics\mapping\mxd\report\ST_NS_121412952_001_ProjectLocationOverview_20140330.mxd Stantec Consulting Ltd. © 2014 PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
3.1.1 Overview of the Biophysical Conditions
The Gordon Lake area is located in the Great Slave Upland LS Ecoregion which is characterized by undulating to rolling till and bedrock plains with an average elevation of 375 metres above sea level (mASL) (Ecosystem Classification Group, 2008). The predominant vegetation in the area consists of mainly black spruce and dwarf birch woodlands which are mainly discontinuous in areas where exposed bedrock is dominant and continuous on till plains. White spruce, dwarf birch and lichen woodlands are common on outwash deposits. Small peat plateaus are common and shore fens occur around some lakes.
Most of the bedrock in the Gordon Lake Area is Archean (over 2.5 billion years old) or Paleoproterozoic 1.6 – 2.5 billon years old) in age (Stantec Consulting Limited, 2015). The bedrock surface is often highly fractured (frost shattered) and subject to extensive frost heave. The borrow assessment completed at the Sites identified discontinuous veneers of till and glaciofluvial deposits. The till veneers generally consist of sandy material with variable amounts of angular to sub-rounded gravel to bolder size fragments. The glaciofluvial material, mainly eskers and/or outwash deposits, are predominately sandy material, with localized gravel. Coarse fragments were generally located at the surface (i.e. 0 to 30 cm in depth) and decrease rapidly with depth. The material is well sorted and contains very low amounts of fines (i.e. silt and clays).
Mammals present in the Project area include voles, squirrels, muskrats, beavers, martens, lemmings, snowshoe hare, moose, wolves, foxes, grizzly and black bears, lynx and weasels. Bird species in the Project include eagles, gulls, ducks, loons and geese.
3.2 SITE HISTORY
3.2.1 Camlaren Mine (SM205)
The Camlaren mine site is divided into several areas including the abandoned mine site on the south side of Muir Island, and the North Cabin Area on the north side of Muir Island (SLR Consulting Limited, 2013a). The site also includes a small abandoned mine site located on Zenith Island located 1.5 km southeast of Muir Island (Figure A.1-1).
Initial mineral exploration activities commenced at Muir and Zenith islands in the late 1930s, after mineral claims on the islands were staked in 1936 (SLR Consulting Limited, 2013a). Between the late 1930s and the early 1960s, exploration on the islands was intermittent. Activities on the islands continued until 1982, when the site was decommissioned.
Heavy equipment, structures, and bulk fuel storage tanks previously located at the site during its operation were removed during the decommissioning of the site in 1982 (SLR Consulting Limited, 2013a). However, concrete pads from several former buildings, waste rock and ore piles, tailings, burn pits, scattered wood and metal debris and areas of hydrocarbon staining were identified on the south side of Muir Island. In the North Cabin area, an intact building was identified, in
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
addition to a burn pile with metal and wood waste. One mine shaft, waste rock/ore pile, and scrap wood debris was identified at Zenith Island.
3.2.2 Burnt Island (SM320)
The Burnt Island mine site is divided into several areas including the shaft area, tailings impoundment, old mill, waste rock area and the Knutsen camp which are all located on the southern interior of the island (SLR Consulting Limited, 2013b). An old saw mill area is present on the southwestern shore of the island. The old saw mill area, the Knutsen camp, and the old mill area are all located along the shoreline of Gordon Lake; however, all the other areas are located inland (Figure A.2-1).
Initial mineral exploration activities commenced in the late 1930s and continued periodically until 1990 when decommissioning activities started (SLR Consulting Limited, 2013b).
Equipment and structures previously located at the site during its operation were removed during the decommissioning of the site in 1993 (SLR Consulting Limited, 2013b). A large waste rock area, fuel storage pad, tailings, burn pits, wooden structures, scattered wood/metal debris and areas of hydrocarbon staining remain at the site.
3.2.3 Goodrock Mine (SM466)
The Goodrock mine site is divided into several areas including a former camp, mill site and the remains of a wharf (SLR Consulting Limited, 2013c). The mill site is located inland; however the former camp are and wharf can be accessed via Gordon Lake (Figure A.3-1).
Initial mineral exploration activities commenced at Goodrock in the late 1930s and continued into the late 1970s (SLR Consulting Limited, 2013c). Between the 1930s and the 1970s exploration activities for gold and tungsten were undertaken at the site. Although no recorded mining activates occurred recently, a habitable cabin remains on the site and it is assumed the area is utilized for recreational purposes.
Fire reportedly swept through the area in 1998; however, an old incinerator, former building debris, exploration trenches, two mine shafts, a metal can dump and the remains of an old wharf are still present on-site (SLR Consulting Limited, 2013c). Fire retardant was observed in localized areas of the site during previous site investigations.
3.2.4 Kidney Pond Mine (SM474)
The Kidney Pond mine site is divided into several areas including the 1983 camp, 1939 camp, exploration camp, portal area and the kidney pond area (SLR Consulting Limited, 2013d). The 1983 camp, 1939 camp and the exploration camp are located away from the main site and are accessible via Gordon Lake. The kidney pond area and the portal area are located inland (Figure A.4-1).
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Historical mining activities at Kidney pond were limited to exploration and commenced in the late 1930s and continued periodically until 2003 when, after being re-staked, work halted (SLR Consulting Limited, 2013d). No processing of mined ore occurred on site and therefore no tailings were observed.
Features observed remaining on site during previous investigations consist of burn pits, scattered debris, surface staining, building pads, tin can dumps, trenches, a core shed and racks, and a waste rock/ore pad (SLR Consulting Limited, 2013d).
3.2.5 Murray Lake (SM490)
The Murray Lake mine site is divided into several areas including the 1938 camp, the 2008 camp and a series of small areas containing exploration trenches (Columbia Environmental Consulting Ltd., 2013a).
Mineral exploration activities commenced at Murray Lake in the late 1930s, after the initial mineral claims were staked in 1937 (Columbia Environmental Consulting Ltd., 2013a). Between the late 1930s and 1940 significant gold exploration activities were undertaken at the site. Exploration activities continued intermittently until 2008 after which time no further mining works were reported.
Fire reportedly swept through the site area around 1995 (Columbia Environmental Consulting Ltd., 2013a). As a result, other than burnt metal debris, little remains at the 1938 camp site.
3.2.6 Storm Property (SM483)
The Storm Property site is divided into two areas; the shaft and the former camp areas (WESA, 2010). The Site consists of two shafts, three trenches, a number of former building footprints, burn pits, ore piles and various scattered debris. The Site is located on a small lake located east of Gordon Lake (A.6-1).
Initial mineral exploration activities commenced at Storm Property in the early 1940s with further mining activities occurring at the site in the late 1970s into the early 1980s (WESA, 2010). Mining activities at the site discontinued in the early 1980s.
3.2.7 Treacy Mine (SM475)
The Treacy site is divided into two sub areas, including the mill area located on the shore of Gordon Lake in the northern portion of the site (SLR Consulting Limited, 2013f)an old camp area is also located on the shore of Gordon Lake south of the mill area (Figure A.7-1).
Mineral exploration activities commenced at Treacy Mine in the mid-1940s, after the initial mineral claims on the islands were staked in 1945 (SLR Consulting Limited, 2013f). Ore processing occurred at Treacy between 1951 and 1953 after which there was a decline in site activity until the 1980s. Activities on the islands continued until the early 2000s. () Stantec File 121413300 6
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Remains of the mine operations observed onsite include ore/waste rock piles, exploration trenches, burn pits, a concrete pad from a former building and scattered wood and metal debris (SLR Consulting Limited, 2013f). Areas of hydrocarbon staining were also identified in the mill area.
3.2.8 Try Me (SM488)
The Try Me mine site is located on the shore of MacDonald (Mac) Lake and is divided into four main areas including the main camp, western camp, shaft and waste rock area as well as the areas containing exploration trenches (Columbia Environmental Consulting Ltd., 2013b).
Mineral exploration activities commenced at Try Me in the late 1930s, after the initial mineral claims were staked in 1938 (Columbia Environmental Consulting Ltd., 2013b). Between the early 1940s and late 1980s no gold exploration activities were undertaken at the site. Exploration activities continued in 1989 but only for a short time before no further mining works were conducted.
Features observed remaining on site during previous investigations consist of scattered debris, wooden structure remains, exploration trenches, a prospect shaft and empty 205 L drums (Columbia Environmental Consulting Ltd., 2013b). Fire reportedly swept through the site area in the late 1990s.
3.2.9 West Bay Mine (SM302)
The West Bay mine site is located on the southeastern shore of Gordon Lake and is sub divided into three areas including the northern, southern and eastern areas and contains an open pit, former mill area, waste rock piles and various scattered debris (EBA Engineering Consultants Ltd., 2009).
Mineral exploration activities were completed at West Bay mine between 1947 and 1948 (EBA Engineering Consultants Ltd., 2009). Site activities ceased until the early 1980s, at which time significant gold exploration activities resumed. Further mine activities continued in the early 1990s with no reported activity after 1991.
3.3 PREVIOUS STUDIES
During the preparation of the preliminary RAP, Stantec reviewed the previous assessment reports completed at each of the sites. The following reports were reviewed during the development of the RAP:
• Burnt Island Mine Phase III Environmental Site Assessment, report completed by SLR for PWGSC, dated March 2013; • Remedial Options Cost Memorandum - Burnt Island Remedial Options Cost Summary, report completed by SLR for PWGSC, dated March 28, 2013; () Stantec File 121413300 7
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• Phase II Environmental Site Assessment SM220 - Burnt Island, report prepared by WESA for PWGSC, dated March 2010; • Camlaren Mine Phase III Environmental Site Assessment, report prepared by SLR for PWGSC, dated March 2013; • Remedial Options Cost Memorandum - Camlaren Mine Remedial Options Cost Summary, report prepared by SLR for PWGSC, dated March 25, 2013; • Phase II Environmental Site Assessment SM205 - Camlaren Mine, report prepared by WESA for PWGSC, dated March 2010; • Goodrock Mine Phase III Environmental Site Assessment, report prepared by SLR for PWGSC, dated March 2013; • Remedial Options Cost Memorandum - Goodrock Mine Remedial Options Cost Summary, report prepared by SLR for PWGSC, dated March 26 2013; • Phase II Environmental Site Assessment SM466 - Goodrock Mine, report prepared by WESA for PWGSC, dated March 2010; • Kidney Pond Mine Phase III Environmental Site Assessment, report prepared by SLR for PWGSC, dated March 2013; • Remedial Options Cost Memorandum - Kidney Pond Remedial Options Cost Summary, report prepared by SLR for PWGSC, dated March 26, 2013; • Phase II Environmental Site Assessment SM474 - Kidney Pond/Knight Bay, report prepared by WESA for PWGSC, dated March 2010; • Phase I/II Environmental Site Assessment Murray Lake Property SM490, report prepared by Columbia Environmental for PWGSC, dated March 2013; • Conceptual Assessment Design and Remediation Plan Murray Lake Property (SM490), report prepared by Columbia Environmental for PWGSC, dated March 2013; • Phase II Environmental Site Assessment SM471 - Storm Property, report prepared by WESA for PWGSC, dated March 2010; • Treacy Mine Phase III Environmental Site Assessment, report prepared by SLR for PWGSC, dated March 2013; • Remedial Options Cost Memorandum – Treacy Mine Remedial Options Cost Summary, report prepared by SLR for PWGSC, dated March 26, 2013; • Phase II Environmental Site Assessment SM475 - Treacy Mine, report prepared by WESA for PWGSC, dated March 2010; • Phase I/II Environmental Site Assessment Murray Lake Property SM490 • Phase I/II Environmental Site Assessment Murray Lake Property SM490, report prepared by Columbia Environmental for PWGSC, dated March 2013; • Conceptual Assessment Design and Remediation Plan TRY ME Property (SM488), report prepared by Columbia Environmental for PWGSC, dated March, 2013; • Phase I Environmental Site Assessment West Bay/Black Ridge Gold Mine SM 211 & SM 302, report prepared by Dillon Consulting Limited for PWGSC, dated March 2007; • Phase II Environmental Site Assessment For West Bay/Blackridge Mine SM 302, report prepared by EBA for PWGSC, report dated April 2009;
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• Draft Human Health and Ecological Risk Assessment for Gordon Lake Mine Sites, Gordon Lake, Northwest Territories. Report prepared by SLR Consulting Limited for PWGSC, report dated February 2014.
Based on findings of the previous reports, Stantec created a summary of waste and hazard components requiring remediation at each of the Sites. Waste and hazard components identified at the Sites include the following:
• Contaminated soil, sediment and tailings • Contaminated surface and groundwater • Waste rock • Non-hazardous waste • Hazardous material • Physical hazards
3.3.1 Remedial Options Analysis
In 2014, Stantec completed an ROA for the Gordon Lakes Remediation Project using the following remedial objectives:
1. Remediate and reclaim sites to meet the applicable guidelines 2. Prevent further migration of contaminants into the environment 3. Remove physical hazards to protect human health and safety 4. Implement a cost effective remediation solution
The ROA developed was based on the findings of the previous assessment programs completed by Columbia Environmental Consulting, SLR Consulting Limited, and WESA. The ROA evaluated several remedial options for each waste and hazard components identified during the previous assessment programs. The remedial options assessed in the ROA are provided in Table 2 below.
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Table 2 Remedial Options Evaluated During the ROA
Remedial Option Soil Sediment Tailings Waste Rock Hazardous Water Physical and Non- Hazards hazardous Material Meta PHC Co-mingled Metals Metals PAG Co-mingled ls (Metal and Materials (Metal and PHC) PHC) Impacts Impacts Excavate /Dredge X X X X X X X and Place in on-site Landfill / Tailings Containment Area Excavate /Dredge, X X X X X X X Containerize for off- site Disposal Ex Situ Solidification/ X X X Stabilization Treat on-site X (landfarm, allu, biopile) Cap X X X X X X Pump and Treat X Backfilling Hazards X Engineered Cap X Hazards
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Once identified, remedial options were assessed using the following criteria:
1. Ability to meet remedial objectives 2. Timeframe to implement 3. Ease of implementation 4. Regulatory and stakeholder acceptability 5. Monitoring requirements 6. Cost
The recommended remedial options selected upon the completion of the ROA process included: • Physical Hazards: − Install engineered caps over the shafts and deep trenches − Backfill shallow trenches with waste rock − Slope mounds or other stockpiled material to match the surrounding topography. − Remove physical hazards from water, if present. • Non-hazardous Waste: − Consolidate and dispose in a centralized landfill to be constructed at one of the Gordon Lake sites. • Hazardous Waste: − Asbestos Containing Materials (ACMs) – Consolidate and dispose in a centralized landfill to be constructed at one of the Gordon Lake sites. − Batteries – Consolidate and dispose in a licensed disposal facility off-site. • PHC and/or metal impacted soil, sediment and tailings − Excavate /dredge transport and dispose in a centralized landfill to be constructed at one of the Gordon Lake sites. • Waste Rock − PAG waste rock / ore: Cap in place or excavate and dispose at a centralized location. − Non-PAG waste rock / ore: Grade and utilize as backfill when addressing physical hazards. • Water: − Treat in an on-site modular water treatment system tailored to specific contaminants of concern (COCs).
3.3.2 Human Health and Ecological Risk Assessment
In 2014, Stantec completed a Human Health and Ecological Risk Assessment (HHERA) for the Project to develop Site Specific Remedial Targets (SSRTs) for use in determining concentrations at which risk to human and ecological health would be low. SSRTs were developed for contaminants of potential concern (COPCs) identified on each of the Sites (Stantec, 2014). The risk assessment process excluded highly impacted areas (i.e. where COPCs were significantly elevated), as risk management was not suitable for these areas (SLR Consulting Limited, 2014). These areas included:
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• Camlaren – North Cabin Area (at the location of the burn pit) • Kidney Pond – 1983 Camp area (in an area of crushed crucibles) and in the area of the burn pits • Storm Property – Camp area (at the burn pits containing battery debris) • West Bay – Assay lab area and the tailings disposal area • Goodrock – Mill Area (within footprint of the former mill).
COPCs that were evaluated during the human health risk assessment (HHRA) included arsenic, cobalt, lead, mercury, petroleum hydrocarbons (PHCs) fractions F1 and F2. The results of the HHRA suggest that there were no risks to the three human receptors evaluated (First Nation residents, First Nations site visitor, and on-site construction/remediation workers) due to direct exposure pathways (i.e. soil ingestion, soil dermal contact, and particulate inhalation) and indirect exposure pathways (i.e., the ingestion of country foods). Although concentrations of PHC F1 and F2 were reported at several sites, there are insufficient quantities of PHCs present to generate soil vapour risks of concern. Although development of the Gordon Lake as residential land is not currently planned, if the land use changes to residential land use, the assessment of the risks associated with vapour inhalation will need to be revisited.
During the ecological risk assessment (ERA), the only COPCs that were evaluated were arsenic, and PHC fractions F2 and F3. The previous ERA completed by SLR Consulting was used to develop SSRTs to protect terrestrial soil invertebrates. Stantec’s review of the ERA concluded that this approach was overly conservative and recommended that the final SSRTs be developed based on risks to human health receptors rather than ecological ones. Once the impacts exceeding the human health SSRTs are remediated (i.e. excavated), there will be little to no risk associated with the residual contamination.
Considering the foregoing discussion, the SSRTs carried forward into the remediation program are as presented in Table 3 below.
Table 3 Final SSRTs – Gordon Lake Remediation Project
COPC Final SSRT (mg/kg) Arsenic 69 Cobalt 130 Lead 332 Mercury, inorganic 13 PHC F1 Fraction 700 PHC F1 Fraction minus BTEX 700 PHC F2 Fraction 1,000 PHC F3 Fraction 2,910
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3.4 SEDIMENT
The estimated volume of impacted sediment identified by SLR was calculated using the soil SSRTs for ecological health protection. During the completion of the risk assessment, Stantec determined that this approach is inconsistent with standard practices, as sediment SSRTs need to be based on toxicological data specific to aquatic species rather than those found in soil. In addition, Stantec does not recommend active sediment remediation, as the risks associated with the impacts to the sediments are not significant. Lines of evidence that support this finding include:
• the relatively small areas of sediment contamination relative to the surrounding aquatic environment (although not fully delineated in some areas) • COPC concentrations in fish in Gordon Lake were found to be similar to concentrations in fish in other areas of Northern Canada (as discussed in the 2014 HHERA conducted by SLR)
With no compelling evidence of deleterious effects and the low risk to human health, the remediation of the contaminated sediments is unlikely to present a significant benefit. The disruption of the habitat during dredging (which is the current remedial option outlined in the ROA) may cause significant adverse impacts. It was therefore concluded that remediation of the aquatic environment at the Gordon Lake mine sites was not warranted at this time. 4.0 REGULATORY CONSIDERATIONS
The remedial guidelines for the Gordon Lakes Remediation Project are based on the federal and territorial guidelines, as these are the most applicable based on the land ownership. Table 4 outlines the federal / territorial guidelines apply to the remediation program.
Table 4 Summary of Relevant Federal / Territorial Remedial Guidelines
Publisher Title Year GNWT Used Oil and Waste Fuel Management Regulations 2003 Guideline for the Management of Waste Asbestos 2004 Guideline for the Management of Waste Batteries 1998 Guideline for the Management of Waste Lead and 2004 Lead Paint Guideline for the Management of Waste Solvents 1998 General Management of Hazardous Waste in the 1998 NWT Guideline for Industrial Waste Discharges in the NWT 2004 Environmental Guideline for Contaminated Site 2003 Remediation CEPA PCB Regulations 2011
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EC Industrial Treated Wood Users Guidance Document 2004 FIGQC Federal Interim Groundwater Quality Guidelines 2010 Alberta Alberta User Guide for Waste Managers 1996 Environment Technical Document for Batch Waste Incineration 2010 Canada AANDC Guidelines for the Closure and Reclamation of 2012 Advanced Mineral Exploration and Mine Sites in the Northwest Territories 4.1 CANADIAN ENVIRONMENTAL QUALITY GUIDELINES
The CCME Canadian Environmental Quality Guidelines (CEQG) provide limits for contaminants in soil, sediment and water. They are intended to maintain, improve, and/or protect environmental quality and human health at contaminated sites in general. These criteria include generic numerical values for the assessment and remediation of soil, sediment and water in the context of agricultural, residential/parkland, commercial, and industrial land uses. Environmental soil, sediment and water quality guidelines are derived using toxicological data to determine the threshold level to the most sensitive receptors. These criteria include the recommended CCME Soil Quality Guidelines (CSQG), Canadian Water Quality Guidelines (CWQG), and the Canadian Sediment Quality Guidelines.
In addition, CCME has produced the Canada-Wide Standards (CWS) for PHCs in Soil, which provides generic Tier 1 criteria intended to protect environmental quality and human health, reported against the four PHC fractions (F1 through F4). The CWS for PHCs in Soil were revised and re-released in January 2008. Stantec has adopted the agricultural land use designation for the Sites as a conservative approach for sites without active mineral claims; however, the residential/parkland criteria have also been provided for comparison purposes (for sites within and outside of mineral claim areas). An agricultural land use is defined by the CCME where the primary activities involve growing crops or tending livestock. This also includes agricultural lands that provide habitat for resident and transitory wildlife and native flora. A residential/parkland land use is defined by the CCME where the primary activity is residential or recreational. These definitions can be applied to the Site and surrounding areas.
Based on the agricultural and residential/parkland land use designations and the varying soil textures present at the Sites, the applicable regulatory guidelines for the sites include:
• Canadian Soil Quality Guidelines for Protection of Environment and Human Health (agricultural and residential land uses for both fine and coarse textured soil). • Canada-Wide Standards for PHC in Soil (agricultural and residential land uses, non-potable groundwater and for both fine and coarse textured soil).
These guidelines are referenced in the Treasury Board of Canada Policy on the Management of Federal Real Property.
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4.2 FCSAP DECISION-MAKING FRAMEWORK
As outlined in the Introduction to the Decision ‐Making Framework (DMF) for Federal Contaminated Sites Action Plan (FCSAP), the DMF is a roadmap that outlines the specific activities and requirements for addressing federal contaminated sites in Canada. The DMF is based on A Federal Approach to Contaminated Sites, a 10 ‐step process guiding federal custodians in all aspects of working with contaminated sites.
Step 7 of FSCAP: Develop Remediation/Risk Management (R/RM) Strategy requires selection of either a guideline or risk assessment approach for the remedial program. Having adopted a risk assessment approach for soil, sediment and tailings, the Gordon Lakes Remediation Project has specific recommendations in the HHERAs that outline the assessed levels of risk from COPCs. If the conditions change (i.e. land use changes), then the findings of the risk assessment would need to be re-evaluated.
4.2.1 Risk Management
Once a risk assessment is completed, the proponent can decide if the resulting risk is acceptable or not and opt for risk management or mitigation strategies in order to reduce the resulting risk to an acceptable level, as appropriate. Risk management is the systematic process of minimizing, monitoring, and controlling the probability and/or impact of identified risks. These mitigation strategies and approaches form the basis of the risk management strategy. The key to risk management is to identify risks that are intolerable and to either eliminate them or mitigate them to a tolerable level. The benefit of using a risk matrix is that it identifies those elements of risk that drive the resulting risk level that can then be targeted for mitigation. This targeted approach allows for more effective risk mitigation. Table 5 below summarizes the standards and guidelines related to risk management, some of which are specific to contaminated sites.
Table 5 Summary of Risk Management Standards and Guidelines
Relevant Standard/Guideline Details Related to Risk Management Once a risk assessment approach is selected, Step 7 of the FCSAP decision making framework outlines development of a risk Government of Canada FCSAP - management strategy. It states that the options for risk management Decision Making Framework - typically involve engineering or institutional controls that can a) May 2013 interrupt the exposure pathways; b) remove receptors; or c) change the form of the contaminant to make it less accessible. The CSA-Q850 guideline is intended to assist with the effective decision-making for managing different types of risks (health, property, environment, etc.). It describes the step-by-step process CAN/CSA-Q850-97 - Risk that can be used to develop a risk management framework. The Management Guideline for steps included in this process are: Decision Makers 1. Initiation 2. Preliminary Analysis 3. Risk Estimation 4. Risk Evaluation 5. Risk Control
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Relevant Standard/Guideline Details Related to Risk Management 6. Action/Monitoring In the summer of 1997, Health Canada launched a fundamental review of its health protection operations. This effort, known as "Health Protection Branch (HPB) Transition," was aimed at helping Health Canada - Decision-Making Health Canada and its partners to better manage risks to the health Framework for Identifying, of Canadians into the next century [Health Canada, 1998]. Through Assessing, and Managing Health HPB Transition, Health Canada developed a decision-making Risks (April 2000) framework and a number of documents that provide guidance in dealing with related considerations. Health Canada's decision making framework references the Guidelines for Decision-Making (U.S. Presidential/Congressional Commission). The document includes Alberta Environment’s risk assessment and management policy for contaminated sites. It provides direction for site managers, stakeholders and professional environmental consultants who are familiar with risk assessment techniques. It provides general guidance for establishing or modifying risk-based Policy for Management of Risks at remediation (cleanup) objectives and applying site-specific risk Contaminated Sites in Alberta assessment and management to meet Alberta Environment requirements. Examples of site-specific risk management by exposure barriers and administrative controls are provided in the document. The document also discusses risk management and monitoring on a long-term basis. Discusses the risk management process, which includes the scope Technical Assistance Bulletin (TAB definition, establishing target levels, quantitative risk target criteria, 17) prepared by Environment non-risk target criteria, hazard identification and risk estimation and Canada - Risk Management for evaluation. Additional information also provided in Tab #18 Contaminated Sites Framework (acceptable vs. non-acceptable risks).
5.0 INTEGRATED REMEDIAL/RISK ACTION PLAN
5.1 RISK ASSESSMENT RESULTS
Upon completion of the risk assessment, Stantec integrated the findings into the ROA. This process included the evaluation of the remedial options to confirm that the recommended remedial methods were valid considering the findings of the risk assessment.
With the exception of soil and sediment, the risk assessment findings did not impact the remedial options presented. For soil, the findings of the risk assessment refined the total volume of soil requiring remediation from a total of 29,290 m 3 to 22,107 m 3. Although the risk assessment allowed for the reduction of the impacted soil volume, a significant volume of impacted soil requiring remediation remains. Upon review of the evaluation criteria, excavate and dispose on-site remains the recommended remedial option for impacted soil on-site.
The revised waste volumes are presented in Table 6 below.
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Table 6 Summary of Waste Volumes by Site
Soil (m3)1 Tailings (m3)2 Waste Rock (m3)4 Non-Hazardous Material (m3)2 Hazardous Material (m3)2 Water 3 Site Metals + Type Type Volume Metals (m 3) Physical Hazards 2 Metals PHC Metals PAG Materials Volume (m3) PHC (m 3) Camlaren 29 m3 of wood debris in various areas None present 0 500 (including the • ~ 13.5 m3 of metal debris in various areas Surficial opening (Shaft), main site, Zenith • ~ 122 m3 of concrete/stone/mortar debris in 1,442 14,896 872 42,000 800 b 195 deteriorating physical hazard barriers Island and North various areas and old head frame Cabin) a • ~ 2 m3 of discarded crucibles • ~ 28 m3 of miscellaneous debris Burnt Island • 39.75 m 3 of wooden debris Asbestos in brake 0.01 - Surficial openings (Shaft, portal and 32 - 240 - 3,200 • 8.25 m 3 of metal debris 93 pads trenches), sharp debris and remaining infrastructure 3 Kidney Pond • ~ 65 m of wood debris None present 0 2,560 • ~ 15 m 3 of metal debris • ~ 5 m 3 of discarded Crucibles Surficial openings (trenches and 763 791 229 - 15,000 108 • ~ 22 m 3 of miscellaneous debris portal), and sharp debris • ~ 0.01 m 3 of blasting caps • ~ 1 m 3 of concrete 3 Goodrock • ~ 56 m of wood debris at camp and mill None present <1 131 • ~ 10 m 3 of metal debris at camp and mill Surficial openings (trenches and - 40 - - - • ~ 1 m 3 of discarded Crucibles at mill 71 shafts) Abnormal mound (suspected • ~ 4 m 3 of miscellaneous debris at camp tailings area) area Treacy • Wood (Unpainted) = 36 m 3 Painted wood 1.5 120 Two surficial openings (trenches) • Metal = 15 m 3 (1.5 m3 ) 783 6 - 6 115 54 approximately 1 m deep. Three ore • Concrete = 1 m 3 piles / waste rock piles. • Misc. Debris = 2 m 3 West Bay • 10 m 3 of metal debris (including one Potential Petroleum <1 2,200 empty 205 L drum) and 5 m 3 of wooden product (partially Surficial openings (bore holes and a 748 61 253 150 - 15 (+ 1 drum) debris filled 205 L drum in large open pit) AEC 7B) Try Me • Scrap Metal (including 11 empty 205 L None present 0 36 Surficial openings (including one 19 (+11 - - - - 65 drums) prospect shaft, boreholes, 30 shallow drums) trenches) Murray Lake • Wood waste and metal debris (including None present 0 1,841 Surficial openings (trenches and - 925 - - 377 4 (+ 3 drums) three empty drums) shafts) Storm Property • Unpainted wood (12 m 3 ) 18 (+45 None present 0 57 Surficial openings (trenches and 1 25 - - 20 • Metals, miscellaneous debris (6 m 3 ) drums) shafts) Total Waste 3,769 16,744 1,594 42,156 19,577 577 4.51 Present 7,445 Assumptions: 1. Volumes of impacted soil presented in Table 6 are total volumes calculated to exceed the SSTL values for soil and tailings. 2. Volumes of tailings presented in Table 6 are from assessment programs completed by previous consultants which exceed the SSTL’s developed by Stantec. 3. Volumes of water presented above include impacted surface water. Volume of water present in underground workings has not been determined during the previous assessment programs and is therefore not presented. 4. Volumes of waste rock presented above include trench rock, ore and waste rock present at the Site. PAG-waste rock presented in column includes all PAG-impacted waste rock, and may include volumes that are co-mingled with contaminated soil and/or tailings. a) Due to the different methods used for calculating the soil volumes, the estimate provided by Stantec is higher than the estimate provided by the previous consultant. The estimates provided in Table 6 were calculated based on sample results rather than distance. Upon the collection of additional data, the impacted soil volumes will be further refined to increase the precision of the volume estimate. b) Quantity of waste rock presented is reflective of the PAG-material located at Zenith Island. Waste rock present at the other locations has as assumed to be non-acid generating.
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5.2 NON-HAZARDOUS WASTE
Non-hazardous waste present at the nine sites has been categorized into two waste streams including:
• Non-Hazardous Wood (Untreated) • Non-hazardous Waste – Other: This includes metal, crucibles, concrete, empty drums (less any lead- painted drums), building materials other than wood including plastic, rubber, textile, fiberglass insulation, glass and miscellaneous metal debris.
Based on the ROA previously completed, the selected remedial option is consolidation, transport and disposal of the non-hazardous waste in a suitable location within the Project area.
5.2.1 Wood Waste
To minimize the volume of wood to be consolidated, transported and disposed of in the Project landfill, Stantec proposes that the untreated wood waste be burned. This would involve the consolidation of untreated wood waste at each site and then burning using a controlled burn in an appropriate container in accordance with the terms and conditions outlined in the Project land use permit. Treated wood will require disposal at an approved disposal facility off-site.
A summary of the non-hazardous wood waste present at the Sites is provided in Table 7.
Table 7 Summary of Wood Waste Present at the Sites
Site Name Approximate Volume (m3) Camlaren 29 Burnt Island 39.75 Kidney Pond 65 Goodrock 56 Treacy 36 West Bay 5 Murray Lake 4 Storm Property 12 Total Volume (uncrushed) 246.75 5.2.2 Other Non-Hazardous Waste
The recommended remedial option for other non-hazardous waste, as outlined in the ROA, was to consolidate and dispose of the waste at a suitable location within the Project area. The material will be cut up and/or crushed and then containerized for transport to the NHW Landfill located at the Camlaren mine site.
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5.3 HAZARDOUS WASTE
Hazardous waste located at the Sites is limited to ACMs, lead based painted materials and organic liquid wastes. The remedial options selected in the ROA are outlined in the subsections below.
5.3.1 Asbestos Containing Materials
The quantity of ACMs present at the Sites is limited to 0.01 m3 located at Burnt Island. The removal of ACMs would be conducted in accordance with the applicable territorial safe work procedures, by trained personnel. The ACMs would be double bagged in accordance with the Guideline for the Management of Waste Asbestos (2004). As outlined in the ROA, Stantec is recommending that the ACM waste be disposed at the NHW Landfill located at Camlaren. The ACMs would be separated from the other waste and containerized in accordance with the Transportation of Dangerous Goods Act. The waste will be transported to the NHW Landfill via the winter road.
5.3.2 Lead Based Paint Materials
A small amount of lead based paint (LBP) materials is present at the Treacy mine site (1.5 m3). Due to the limited quantity present, the selected remedial option for this waste stream is to dispose the LBP materials at an off-site disposal facility. The LBP materials would be separated from the other non-hazardous waste and containerized in accordance with the Transportation of Dangerous Goods Act. The containerized waste would be stored at the on-site storage area until such time that the waste could be transported off-site to the disposal facility via the winter road.
5.3.3 Liquid Organic Waste
The liquid organic waste present at the sites includes a partially filled drum (<205 L) located at the West Bay mine site. Prior to the consolidation process, the liquid would be sampled to confirm waste disposal and transportation requirements. Upon completion of sampling, the drum will be placed in an overpack container, in accordance with the Transportation of Dangerous Goods Act, and stored at the on-site staging area until such time that the disposal requirements can be confirmed. Once confirmed, the drum would be transported off-site to the licensed disposal facility via the winter road.
5.4 SOIL, SEDIMENT AND TAILINGS
The recommended remedial option presented in the ROA for soil, sediment and tailings was to excavate/dredge the impacted soil/sediment/tailings, and transport to a suitable disposal location within the Project Area.
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As discussed in Section 3.4, due to the potential for significant adverse environmental impacts associated with the dredging of impacted sediment at the sites, Stantec has revised the ROA to exclude the excavation/dredging of the impacted sediment.
5.4.1 Soil and Tailings
Upon completion of the risk assessment by Stantec, the estimated volume of impacted soil and tailings was revised and the remedial options were updated to reflect the amended quantities. Once the SSRTs were applied, the quantity of metal and PHC co-mingled impacted soil was reduced; however, the volume of soil and tailings requiring disposal remains significant. Table 6 outlines the quantities of impacted soil present at each of the Sites.
The initial remedial option selected in the ROA identified that the impacted soil and tailings should be disposed of in a centralized NHW Landfill constructed at one of the Gordon Lake sites. In comparison to the other sites, the Camlaren mine site contains the largest volume of impacted soil and tailings. Due to the volume of impacted material present, Stantec has presented one project scenario that would include the disposal of the impacted soil and tailings at a NHW Landfill constructed at Camlaren.
In this scenario, the NHW Landfill located within the footprint of the existing tailings impoundment at Camlaren. In this option, the tailings located in the impoundment would be excavated and stockpiled on-site until such time that an engineered NHW Landfill is constructed in the footprint of the former tailings impoundment. The excavation of the tailings would occur in a staged approach, allowing for the construction of new berms (where necessary), and installation of a geo-synthetic liner on the base of the NHW Landfill . Upon completion, impacted soil and tailings from all the sites will be transferred into the Camlaren NHW Landfill . Once complete, the wastes will be capped with an engineered impermeable cover system, limiting the potential for water intrusion. The excavations will be backfilled with suitable fill material, re-contoured and re-vegetated as required. This option would significantly reduce the risk and cost associated with transporting the impacted soil and tailings to another site.
A more cost feasible option may be to construct a Tailings Containment Area (TCA) at the site of the present tailings area at Camlaren. Conceptual engineering design would be required in order to evaluate the feasibility of this option as compared to the current option of disposal within the proposed NHW landfill – the required TCA cover system, estimation of borrow materials by type, likely performance, and monitoring requirements would all need to be defined in order to permit comparison of options. This comparison will be completed along with updates to this preliminary RAP, and if warranted, the proposed remedial option for impacted soils and tailings will be updated.
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5.5 WASTE ROCK
Similar to impacted soil and tailings, the amount of waste rock at the sites is significant. With the exception of Goodrock and West Bay, PAG waste rock is present at each site. Due to the potential impacts from acid rock drainage (ARD) and metal leaching, the recommended remedial approach for this waste is to cap in place with an engineered cover system to limit generation and migration of contaminants from the waste rock.
The PAG waste rock would be consolidated at a centralized location at each of the sites. The PAG waste rock would be surrounded by non-PAG material and re-graded to create a stable landform. Over time, the area will become encapsulated in permafrost which will limit the mobility of contaminants from the area. If required, a collection system can be constructed to collect any contaminated runoff or leachate from the area. The final grading of the area will include the construction of surface water diversion ditches that will divert uncontaminated runoff from the area. The area will be re-vegetated to reduce the potential for surface water erosion and provide stability.
The waste rock disposal areas will be required to be inspected to assess stability and long term performance of the cover system. Thermistors will be installed in the disposal areas to confirm the presence of the permafrost.
5.5.1 Non-PAG Waste Rock
The recommended remedial approach presented in the ROA included the use of non-PAG waste rock as back fill to address physical hazards on the sites (i.e. portals, trenches, pits). Where possible, waste rock will be placed in underground mine workings (i.e. portals) or open pits. Once complete, the non-PAG material would be re-graded into a stable landform with a flattened overall slope.
5.6 WATER
As outlined in the ROA, impacted surface water and groundwater is present at the sites. The recommended remedial option is to extract the water and treat in an on-site modular water treatment system. The volumes of impacted water identified in Table 6 includes surface water located in the tailings impoundments, the portal openings, trenches and open pits.
In addition to the surface water, additional water may be encountered during the remedial activities completed within 30 m of the high water mark of waterbodies or within wetland areas (i.e. within the bladder farm at Camlaren; in the wetland at Kidney Pond). During the excavation of impacted soil within these areas, additional water intrusion into remedial excavations may occur. Similar to the surface water present within the mine workings, excavation water should be pumped into temporary storage tanks and treated in the on-site wastewater treatment system (see Section 2.6).
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All impacted water encountered will be pumped into temporary storage tanks and treated in an on-site wastewater treatment system. Following treatment, the wastewater will be contained in suitable storage containers until such time that the analytical results confirm concentrations of contaminants are below applicable wastewater discharge criteria. Wastewater discharge criteria will be based on those outlined in the Project’s water license. In the absence of criteria in the water license, the Government of the Northwest Territories Guideline for Industrial Waste Discharges in the Northwest Territories (2004) would apply.
5.7 PHYSICAL HAZARDS
Physical hazards found at each of the mine sites include mine openings and trenches (related to mineral exploration and ore extraction), open pits, large rock piles and mounds.
The recommended remedial approach for addressing these hazards is dependent upon the nature of the hazards themselves. Surficial openings, where possible, would be backfilled using on-site waste rock that has been confirmed to be non-PAG, while hazards arising from remaining infrastructure would be removed and disposed of with the other non-hazardous debris collected from each site. Mounded material located at the Goodrock mine site, should be re-contoured to match the surrounding topography. 6.0 GEOTECHNICAL CONSIDERATIONS
6.1 SITE ACCESS
Site access is limited as there is no all-season access road to any of the nine sites. During the previous assessment programs, the Sites were accessed via Twin Otter on floats or by boat. For sites that were accessed with fixed winged aircraft, the aircraft were docked along the shoreline. There were no functional docks at any of the Sites.
Site access options that were considered for the remedial program included the utilization of the Tibbitt to Contwoyto Joint Venture winter road, from which branch roads would be advanced to each site. Intended branch road alignments would need to be determined and verified prior to the initiation of any remedial work.
Temporary haul roads would likely need to be constructed to the borrow sources and access routes to the winter road system. The existing site roads are in poor condition (generally limited to trails) and several areas do not have road access. Therefore, the existing roads at the sites will also require upgrading prior to the commencement of remedial activities. Upon completion of the Project, the upgraded roads should be decommissioned.
There is a winter road connecting Murray Lake to Gordon Lake, which would allow winter access to the Murray Lake and Try Me sites. The other sites located off of Gordon Lake (including Storm Property and Goodrock) will require temporary access roads to be constructed. Due to the () Stantec File 121413300 22
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limited amount of waste present at these sites, it may be feasible to transport the wastes via air (either fixed wing aircraft on floats/skis or by helicopter).
6.2 BORROW SOURCES
Borrow source materials are required for remedial program, specifically for the construction of the NHW landfill, staging areas, winter road construction material and backfill materials. In 2014, Stantec completed an assessment of borrow sources within the Gordon Lake area. In total, the program evaluated 67 sites which were of varied size and composition. The following section provides a review of the potential borrow sources that would be of sufficient size to accommodate the remediation requirements. During the evaluation of these sites, Stantec has presented options that are:
• Previously disturbed • Close proximity to the sites • Have suitable type and quantity of borrow material • Require minimal logistics (i.e. access roads) • Minimize environmental concerns
Borrow Source GD-15 to GD-21– This borrow source is located on a very large esker complex located on the west side of Gordon Lake south of the Murray Lake Mine Site, see Figure A.10-6. Covering an area of 320 hectares (ha), this source contains hundreds of thousands of cubic meters of granular material. An existing borrow pit is located on the eastern portion of the esker (GD-18) and contains >250,000 m3 of gravelly sand to sand with trace gravel. The other deposits in this group contain > 1,000,000 m3 of material of similar composition. The material would be appropriate for the construction of the centralized landfill. It would also be suitable as backfill material. Suitable granular material is located east of GD-18; however a winter haul road would need to be constructed through previously undisturbed terrain. The borrow source is located on crown land within the Akaitcho Land Withdrawal Area.
Borrow Source GD-37/GD-38/GD-39 – This borrow source, a glaciofluvial esker deposit, is located 250 m east of Gordon Lake and 100 m east of the West Bay mine site’s waste rock pile, see Figure A.10-2. The esker consists of three separate deposits 2.5 km, 600 m and 200 m long, respectively; all within 30 to 160 m wide. The thickness of the deposit ranges from 2 m to 3 m and is estimated to contain approximately 230,000 m3 of granular material. A series of trails lead to an existing borrow pit located on the eastern portion of the esker (GD-37). The existing borrow pit is used by the Joint Venture Management Committee during the maintenance of the Tibbitt to Contwoyto winter road (permit number MV2009X0047).
Borrow Source GD-45 – This borrow source, a glaciofluvial esker deposit, covers approximately a third of the island and is located 200 m south of the Burnt Island mine site, see Figures A.10-4 and A.10-5. The deposit showed highly variable material textures ranging from medium to course sand with gravel, clean fine gravel and some sandy gravel and cobble. The deposit is estimated
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
to contain approximately one million cubic meters of granular material. A small borrow pit (<25 m2) was observed near the old dock area on the southeast side of the island.
As the majority of the borrow sources assessed during the borrow source assessment contained mainly sand with gravel, Stantec also evaluated the potential for material that would be suitable as riprap for erosion control. The waste rock located at West Bay has been confirmed to be non- potentially acid generating and is currently utilized by the Tibbitt to Contwoyto Joint Venture on the winter road. Therefore, this source could also provide a viable borrow source for rip rap.
Upon site selection, the design of the borrow source will be required to adhere to the conditions of the land use permit, quarry permit and other legislation. 7.0 CONCEPTUAL REMEDIAL DESIGN
7.1 REGULATORY APPROVALS
Based on the tasks to be completed during the Project, the Project will require the following permits and licenses:
• Land Use Permit under the Mackenzie Valley Resource Management Act – For use and occupation of land • Water License – Use of water or deposition of waste into water • Fisheries Authorization – To complete work in fish bearing waterbodies (i.e. water withdrawal from Gordon Lake for drinking water and/or winter road maintenance). • Quarry permit – To obtain borrow source materials. • Explosive Authorizations – For the possession, transportation and use of explosives • Quarry authorization / access authorization – for access and work on Aboriginal private lands (such as those within the Akaitcho Interim Land Withdrawal area). • Timber permit – to clear timber (including along the access route to the borrow source).
A minimum of three months should be allowed for the acquisition of required permits and licenses.
7.1.1 Stakeholder / Community Meetings
To be completed at a later date.
7.2 BORROW MATERIAL STAGING
Borrow material will be staged at each of the sites prior to the excavation of impacted soil / tailings. Borrow material shall be stored further than 30 m from any waterbody. Once the excavation activities are completed and confirmation of clean excavation boundaries has
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
been obtained, the borrow material will be used as backfill material. The surface of the backfilled excavation will be graded to match the surrounding topography.
7.3 WASTE STAGING AREA
A contained Waste Staging Area is required at each of the sites to collect, sort, and containerize wastes. At sites where hazardous waste and/or impacted soil/tailings are present, thestaging area should be constructed as an engineered containment cell and be lined with a geosynthetic liner. Upon completion of the remediation activities, the area will be decommissioned and the liner will be disposed off-site in an approved disposal facility. At each site, the staging area will be constructed greater than 100 m from any waterbody, in an area free of ponded water.
7.4 NON-HAZARDOUS WASTE LANDFILL
As discussed previously, Stantec is recommending that a NHW Landfill be constructed at the Camlaren mine site. The NHW Landfill would be used for the disposal of impacted soil and tailings exceeding the SSRTs and/or the applicable criteria. Below are the general requirements for construction. The specifications of the NHW Landfill will be further detailed and refined in the design stage of the Project.
7.4.1.1 Location
As the NHW Landfill will contain impacted soil and tailings, the approximate volume of waste to be disposed is 22,107 m3. The proposed location of the NHW Landfill is shown on Figure A.10-1in Appendix A. Selection of the final site location will be completed in the final RAP. The NHW Landfill will be sited in an area that is away from any permafrost sensitive areas, vegetated areas and archeological features (AANDC, 2012). In addition, the NHW Landfill will be constructed in an area away from the impacted materials, a minimum of 30 m from any waterbody or archeological site and ina relatively flat area.
7.4.1.2 Design
The NHW Landfill will be constructed in accordance with the applicable territorial and federal regulations. The NHW Landfill will include a geo-synthetic liner base, perimeter berms and an engineered impermeable cover. The design will be reviewed by a geotechnical engineer prior to finalization and will include a thermistor monitoring system so freeze back can be monitored. In addition, groundwater monitoring wells should be installed around the perimeter of the cell for groundwater monitoring purposes.
Engineering designs will be required during the regulatory approval process. Therefore engineering design work should be completed in advance.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
7.4.2 Water Treatment System
A water treatment system, designed to specifically address the COPCs discussed within this report, will be transported to each of the sites. Impacted water would be pumped to the system, treated and discharged directly back onto the sites after remedial targets have been confirmed. The discharged water would need to comply with the conditions of the Project Water License and other legislation.
7.4.3 Waste Rock Cover System
Prior to installation of the waste rock cover system, the waste rock would be re-graded as outlined in Section 5.5. The cover system would consist of a synthetic low permeability system that would be installed on top of the re-graded waste rock. Organic soils will be placed on-top of the cover system to promote re-vegetation.
The design of the waste rock cover system is preliminary and should be revisited at the design stage, to confirm geotechnical requirements. 8.0 SITE REQUIREMENTS FOR REMEDIATION
8.1.1 Camp
Due to the remote location of the sites, a temporary camp should be constructed at Camlaren to facilitate the timely remediation of the sites. The camp should be constructed in a previously disturbed area (if present), to minimize disturbances as much as possible. The camp will be constructed in an area free of impacted material – a proposed location at the south end of Muir Island has been identified. Fuel required for the camp shall be stored in accordance with the applicable legislation.
The camp should have a capacity for a minimum of 20 on-site workers and associated camp staff. Water samples collected from Gordon Lake in the area of the Site were not analysed for drinking water quality, therefore a determination as to the suitability of Gordon Lake as a drinking water source cannot be made. A drinking water treatment system may be required.
The temporary camp will be constructed with suitable infrastructure to meet territorial guidelines for this type and size of camp (such as sewage collection) and will be constructed and prepared for weather and/or emergency situations. Domestic waste generated from the camp should be either incinerated or disposed off-site at an approved disposal facility. Upon completion of the Project, all camp infrastructure will be removed from the Project area.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
8.1.2 Equipment
Heavy equipment including trucks, excavators, loaders and dozers may be required to consolidate and transport, and dispose of the wastes present at the sites.
To facilitate the completion of multiple sites concurrently, Stantec is proposing that a commercial barge be used to transport equipment / personnel between the sites (where possible). Due to limited availability and requirements for the barge, the barge will be fabricated to ensure that the equipment can be used on Gordon Lake considering the lake depth and cargo requirements. If a barge is to be used during the remediation activities, docks will be required to facilitate the transfer of equipment / wastes.
For sites that are not located on Gordon Lake, portable heavy equipment (e.g. Kubota excavator) can be mobilized to the sites via a fixed winged aircraft on floats or via a helicopter.
8.1.3 Fuel
Diesel fuel and gasoline will be required during the Project. All fuel will be transported to the Camlaren mine site via the winter road. Fuel should be stored at the proposed camp located at the Camlaren mine site. 9.0 ADDITIONAL ACTIVITIES
9.1 PRE-REMEDIAL ACTIVITIES
During the preparation of this preliminary RAP, Stantec developed a Data Gap Analysis Report for PWGSC to outline the additional information required prior to the commencement of the remediation program. The Data Gap Analysis recommended the following:
• Additional sampling of surface water, soil, waste rock, and/or building materials at the sites. • Continuation of static and kinetic testing on one waste rock sample collected from West Bay.
In addition, Stantec also recommends that the following activities be completed:
• Archeological impact assessment of the borrow source areas identified in this report • Confirmation that water quality in Gordon Lake meets the Health Canada Drinking Water Quality Guidelines.
The Project scenario outlined in this RAP is preliminary and requires further evaluation incorporating data collected during the 2015 assessment program.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
9.2 CONFIRMATORY ACTIVITIES DURING REMEDIATION
During remediation, confirmatory soil samples will be collected after impacted soil/tailings are removed to assess if residual concentrations are less than the applicable criteria. Samples will also be collected of impacted soils/tailings to characterize COC concentrations prior to placement in the NHW Landfill .
In addition to confirming soil concentrations, quality testing will be conducted to confirm earthworks such as testing for fill quality prior to construction of the NHW Landfill . The testing will be conducted to determine if the construction is in accordance with the specifications for the remediation.
Finally, during remediation, testing will be required as per the conditions of the Land Use Permits and Water Licenses.
Note this is not an extensive list of activities to be conducted during remediation. These will be specified in the remediation design phase.
9.3 POST REMEDIAL ACTIVITIES
Residual contamination may be present at the staging areas following the completion of the remedial activities. These areas will be visually assessed for contamination indicators such as staining, debris, or paint chips and sampled if required. Any deviations from baseline conditions will require rectification on the part of the contractor.
The Project will require post-remedial monitoring including:
• Visual monitoring to observe the physical integrity of the NHW Landfill and waste rock cover systems including observations for possible settling, erosion, frost action, vegetation, leachate, staining, etc. • Groundwater monitoring through the installation of three to four groundwater monitor wells surrounding the NHW landfill. • Surface water monitoring of adit water (if present) and down-gradient areas of the waste rock cover systems to confirm the effectiveness of the cover system.
In addition to the above noted monitoring requirements, the NHW Landfill will also require thermal monitoring, which will consist of obtaining measurements of the sub-surface ground temperature within the NHW landfill, to gauge the re-establishment of pre-disturbance thermal regime conditions.
Areas that are disturbed during the remedial activities will be re-graded to match existing surface grades. Concrete slabs will be left in place. Borrow material will be placed in these areas to match top-of-concrete to final surface grades.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
A long-term monitoring (LTM) plan will be prepared during the remediation program, reflecting all remediation and risk management areas than require post-remediation monitoring, and including thresholds and action levels that would trigger re-visits of remedial options should their effectiveness not be demonstrated through the results of the monitoring effort. 10.0 SCHEDULE
A possible schedule for the Project is presented in Table 8 below.
Table 8 Proposed Schedule
Activity Timing Additional Data Collection June – September 2015 Update preliminary RAP with October 2015 assessment findings Stakeholder / Community November – December 2015 Meetings Finalize RAP January 2016 Design Remediation and Prepare February to June 2016 Tender Place Tender June 15, 2016 Tender Closure July 15, 2016 Regulatory Permits and Licenses September 15, 2016 Mobilize Equipment to Site January 2017 Develop Borrow Sources and February to March, 2017 Transport Borrow Material to Sites Conduct Remediation April 2017 to March 2019 Long term monitoring of NHW 2019 to 2042 Landfill and waste rock cover systems Final site closure 2041
11.0 REMEDIAL PLANNING STATUS
The RO’s presented in this preliminary RAP are based on the information provided in the previous reports for each of the sites. The Project scenario outlined in this RAP presents one option for the remedial program; elements of this RAP that may be changed include:
Disposal of non-hazardous waste and impacted soil and tailings: Alternate project scenarios for these waste streams include off-site transport and construction of a Tailings Containment Area (TCA). The TCA would consist of an unlined containment cell that would retain tailings and/or
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
non-compliant water. Upon the integration of additional information (i.e. survey data), further analyses and conceptual design can be completed to determine which remedial option is most appropriate. Such determination will be made upon completion of the finalized RAP. 12.0 CLOSURE
This report documents work that was performed in accordance with generally accepted professional standards at the time and location in which the services were provided. No other representations, warranties or guarantees are made concerning the accuracy or completeness of the data or conclusions contained within this report, including no assurance that this work has uncovered all potential liabilities associated with the identified property.
This report provides an evaluation of selected environmental conditions associated with the identified portion of the sites as reported in previous reports provided to Stantec. There are no assurances regarding the accuracy and completeness of this information. All information received from the client or third parties in the preparation of this report has been assumed by Stantec to be correct. Stantec assumes no responsibility for any deficiency or inaccuracy in information received from others.
Conclusions made within this report consist of Stantec’s professional opinion as of the time of the writing of this report, and are based solely on the scope of work described in the report, the limited data available and the results of the work. They are not a certification of the property’s environmental condition. This report should not be construed as legal advice.
This report has been prepared for the exclusive use of the client identified herein and any use by any third party is prohibited. Stantec assumes no responsibility for losses, damages, liabilities or claims, howsoever arising, from third party use of this report.
This report is limited by the following:
• The information provided in the reports completed by others, listed in Section 3.3. These reports were assumed to provide correct/accurate information. Where data gaps existed, assumptions were made to generate volumes of impacted materials (where delineation had not been achieved). It is important to note that minimal to no groundwater delineation (if required) has been completed at the Sites to date. • It is assumed that the volumes of PAG material reported by others are in fact acid- generating. Previous reports recommend that further analysis be completed to determine validity of PAG volumes. Stantec has assumed that the total reported volumes of these materials are acid-generating.
The conclusions are based on the site conditions described in the previous reports reviewed by Stantec at the time the work was performed at the specific testing and/or sampling locations, and conditions may vary among sampling locations. Factors such as areas of potential concern () Stantec File 121413300 30
PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
identified in previous studies, site conditions (e.g., utilities) and cost may have constrained the sampling locations used in the previous assessment. In addition, analysis has been carried out for only a limited number of chemical parameters, and it should not be inferred that other chemical species are not present. Due to the nature of the investigation and the limited data available, Stantec does not warrant against undiscovered environmental liabilities nor that the sampling results are indicative of the condition of the entire site. As the purpose of this report is to review provided reports and assess remedial options, the identification of possible environmental risks not summarized in the previous reports is beyond the scope of this assessment.
Should additional information become available which differs significantly from our understanding of conditions presented in this report, Stantec specifically disclaims any responsibility to update the conclusions in this report.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
13.0 STANTEC QUALITY MANAGEMENT
This document entitled Preliminary Remedial Action and Risk Management Plan for Gordon Lake Mine Sites, Gordon Lake, Northwest Territories was prepared by Stantec Consulting Ltd. for the account of Public Works Government Services Canada. This report has been prepared by:
DRAFT
Patricia Coyne, B.Sc. EPt Environmental Scientist
DRAFT
Michael Doucet, B.Sc., P.Ag. (BC, NS), EP Project Manager
This report has been reviewed by:
DRAFT
David Wilson, M.A.Sc., P.Eng. (ON, NT/NU) Senior Reviewer
File 121413300 32
PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
14.0 REFERENCES
CCME. (2001). Canada Wide Standards for Dioxins and Furans . Columbia Environmental Consulting Ltd. (2013a). Phase I/II Environmental Site Assessment Murray Lake Property SM490. Columbia Environmental Consulting Ltd. (2013b). Phase I/II Environmental Site Assessment - Try Me Property (SM488) Northwest Territories. EBA Engineering Consultants Ltd. (2009). Phase II Invironmental Site Assessment for West Bay/Black Ridge Mine SM 302 Northwest Territories SOA NO.00-05-6003-8. Ecosystem Classification Group. (2008). Ecological Regions of the Northwest Territories - Taiga Shield. Department of Environment and Natural Resources, Government of the Northwest Territories. Yellowknife, Canada. Environment Canada. (2010). Technical Document for Batch Waste Incineration. GNWT. (2003). Environmental Guideline for Contaminated Site Remediation. GNWT. (2004). Environmental Guideline for Industrial Waste Discharges in the NWT, Schedule II: Standards for Non-point Sources Discharges. GNWT. (2004). Guideline for the General Management of Hazardous Waste. Government of the Northwest Territories. (2004). Guideline for the Management of Lead and Lead Based Paint. SLR Consulting Limited. (2013). Goodrock Mine Phase III Environmental Site Assessment. SLR Consulting Limited. (2013a). Camlaren Mine Phase III Environmental Site Assessment. Prepared for PWGSC. SLR Consulting Limited. (2013b). Burnt Island Mine Phase III Environmental Site Assessment. SLR Consulting Limited. (2013c). Goodrock Mine Phase III Environmental Site Assessment. SLR Consulting Limited. (2013d). Kidney Pond Phase III Environmental Site Assessment. SLR Consulting Limited. (2013f). Treacy Mine Phase III Environmental Site Assessment. SLR Consulting Limited. (2014). Draft Human Health and Ecological Risk Assessment, Gordon Lake Mine Sites, Gordon Lake, NT. Prepared for PWGSC. Stantec. (2014). Review of SSRTs, Summary and Conclusions of the HHRA for Nine Former Mine Sites, Gordon Lake, Northwest Territories. Prepared for PWGSC. Stantec. (2014). Supplemental Assessment of Site- Specific Remedial Targets for Nine Former Mine Sites, Gordon Lake, Northwest Territories. Prepared for PWGSC. Stantec Consulting Limited. (2015). Gordon Lake Borrow Assessment - Final Report.
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PRELIMINARY REMEDIAL ACTION AND RISK MANAGEMENT PLAN FOR GORDON LAKE MINE SITES, GORDON LAKE, NORTHWEST TERRITORIES
WESA. (2010). Phase II Environmental Site Assessment SM471 - Storm Property.
() Stantec File 121413300 34
Appendix A Figures
() Stantec
387000 387500 388000 388500 389000
± Legend Watercourse
North Cabin
0 Area 0 0 0 0 0 7 7 8 8 9 9 6 6 d x m . w e i v r e v O _ n a l P e t i S _ 1 - Gordon 1 . A
g Lake i F _ P A 0 0 R _ 0 0 n 5 5 6 6 e r 8 8 a 9 9 l 6 6 m a C _ 0 0 3 3 1 4 1 2 1 \ n e r a l m Try Me Burnt Island a C \ n a l
P Goodrock
n Gordon o i t Murray Lake c
A Storm l Camlaren Mine a i d Camlaren e Area North m e R \ D X Kidney
M Northwest \ g Territories Pond n i w
a Treacy r West Bay D \ 0 0 e 0 0 n i KEY MAP 0 0 6 6 M
8 8 s 9 9 e 6 6 k a L n o Notes d r o 1. Coordinate System: NAD 1983 UTM Zone 12N G
- Camlaren Mine
0 0
3 Area South 2. Basemapping: CANVEC © Department of 3
1 Natural Resources Canada. All rights reserved. 4 1 2 1 \ s 3. Geonames from GeoBase®, Downloaded March 2013. e s a b
a 4. Orthoimagery © MapMart, 2011. t a D \ t 5. Not all features included in the legend are visable m
g within the map extent m _ e s a b _ a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 0 0
\ Zenith Island 0 0 e 5 5
v Public Works and 5 5 i t 8 8
c Mine Area 9 9 o 6 6 a
z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.1-1 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 200 400 0 1 f - 0 m Camlaren 4 2
0 : 0 d
1 1:8,000 e d s i Mine Site - Overview v C \ e \ R 387000 387500 388000 388500 389000 :9 UW 388100 388200 388300 388400
¡¢ :9 43 43 ± Legend ¡¢ Burn Pit Wet Area 43 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation 0 0 0 0 d 0 0 x 6 6 8 8 m . 9 9 6 6 h t
u 43 o
S 43 a e r
A :9 e n i M _ n a l P e t i S _ O S _ 2 - 1 . A g i F _ P A R
_ :9 n e r 43 a l m 43 :9 a :9 C _ 0 0
3 :9 43:9 3 1 4 1
2 :9 :9 UW 1 \ n e r a l m a 43 C \ n a l P n o i 0 0 t 0 0 c 9 9 A 5 5 l 43 8 8 a i 9 9 6 6 d e
m 43 e ¡¢ R NORTH \ 43 D CABIN X :9 M 43 \ g 43 n i w a
r ¡¢
D 43 \ e MINE n i AREA M s
e NORTH k a L
MINE AREA n ¡¢
o SOUTH d r o G
ZENITH -
0 ISLAND 0 3
3 43 KEY MAP
1 KEY MAP 4 1 2 1
\ Notes s e s 1. Coordinate System: NAD 1983 UTM Zone 12N a b :9 a t a 2. Basemapping: CANVEC © Department of D \
t Natural Resources Canada. All rights reserved. m g Gordon m
_ 3. Geonames from GeoBase®, Downloaded March 2013. e s Lake a b
_ 4. Orthoimagery © MapMart, 2011. a t 0 0 a 0 0 d 8 8 _
5 5 5. Not all features included in the legend are visable 2
8 8 February 2015 1 9 9 within the map extent 0 6 6 121413300 0 4 1
2 Client/Project 2 1 \ e
v Public Works and i t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.1-2 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 25 50 0 1 f - 0 m Camlaren - Mine Area South 4 2
0 : 0 d
1 1:1,300 e d s i Areas Requiring Remediation v C \ e \ R 388100 388200 388300 388400 388200 388300 388400
Legend 43 ± ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal 43 :9 Structure Remains Waste Rock/Ore UW ¡¢ TTT Trench Watercourse Area Requiring 43 Remediation 0 0 0 0 3 3 6 6 8 8 9 9 6 6 d x m . h t r o
N UW a e r A e :9 n i M _ n a l P e t i S
_ :9 O S _ 3 -
1 43 . A g i F _ P A R _ n :9 e r a l m
a 43 C _ 0 0 3 3 1 4 1 2 1 \ n e r a l m a C \ n a l P n o i 0 0 t 0 0 c 2 2 6 6 A l 8 8 a i 9 9 6 6 d e m e
R NORTH \
D CABIN
X 43 M \ g n i w Gordon Lake a r D
\ MINE e n i AREA M
s NORTH e k a
L MINE AREA 43 Gordon n SOUTH o d r Lake o :9
G ZENITH
- ISLAND 0 0
3 KEY MAP 3 KEY MAP 1 4 1 2
1 Notes \ s
e 1. Coordinate System: NAD 1983 UTM Zone 12N s a
b :9 a ¡¢ t 2. Basemapping: CANVEC © Department of a
D Natural Resources Canada. All rights reserved. \ t m g 3. Geonames from GeoBase®, Downloaded March 2013. m _ e s a 4. Orthoimagery © MapMart, 2011. b _ a t a 5. Not all features included in the legend are visable d _
2 within the map extent February 2015 1
0 121413300 0 0 0 0 0 4 1 1 1 6 6 2 Client/Project 8 8 2 9 9 1 UW 6 6 \ e v i Public Works and t c o a z :9 Government Services Canada \ n 1 e 2 c
2 UW Gordon Lake Gap Analysis s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.1-3 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 25 50 0 1 f - 0 Camlaren - Mine Area North
4 m 2
0
: ¡¢ 0 d
1 1:1,200 e d s i Areas Requiring Remediation
v 43 C :9 43 \ e \ R 388200 388300 388400 43 388800 388850 388900
± Legend ¡¢ Burn Pit Wet Area Gordon Lake 34 Debris Tailings WU Drum Trench/Shaft :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation 0 0 0 0 1 1 7 7 8 8 9 9 6 6
¡¢34 d x m . n i b
a :9 C h t r o N _
n NORTH a l CABIN P 34 e t i S _ O S
_ :9 4 Gordon Lake - 1 . 0 0 A 5 5
g MINE 0 0 i 7 7 F 8 8 _ AREA 9 9 P 6 6 A NORTH
R 34 _ n MINE AREA e r a l SOUTH m a
C ZENITH _ 0
0 ISLAND 3 3
1 KEY MAP 4 1 2 1 \ n
e Notes r a l 1. Coordinate System: NAD 1983 UTM Zone 12N m a WU C
\ Basemapping: CANVEC © Department of
n 2. a l Natural Resources Canada. All rights reserved. P n o i :9 t c 3. Geonames from GeoBase®, Downloaded March 2013. A l a i :9 d e 4. Orthoimagery © MapMart, 2011. m e R
\ 5. Not all features included in the legend are visable D
X within the map extent M \ February 2015 e n i 121413300 M e k Client/Project a L n o Public Works and d r o o
z Government Services Canada G n \ e p
c Gordon Lake Gap Analysis s o t e k r s c e
e Figure No. D d t \
: o z y B n A.1-4 e 3 c 2 - s Title 2 e r 0 - c 5
e 0 10 20 1 d 0 t m Camlaren - North Cabin 2 \
: s r 0 0 d e 0 1:500 0 e s 0 0 s i U Areas Requiring Remediation 7 7 v \ 8 8 : e 9 9 C R 6 6 388800 388850 388900 0 386700 386750 386800 386850 0 0 0 6 6 5 5 8 8 9 9 6 6
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation Gordon Lake d x m . d n a l s I h t i n e Z _ n a l 0 0 P 5 5 e t 5 5 i 5 5 S 8 8 _ 9 9 O 6 6 S _ 5 - 1 . A g i F _ P A R _ n e r a l m a C _ 0 0 3 3 1
4 ¡¢ 1 2 1 \ n e r a l m 4343 a C
\ ¡¢ n 43 a l P n o i t c NORTH A l
a CABIN i d e m e R \
D Gordon Lake X 43 M
\ MINE g n i 43 AREA w
a NORTH r D
\ MINE AREA e
n TTT i SOUTH 0 0 M 0 0
43
s 43 5 5 5 5 e 8 8 k ZENITH 9 9 a 6 6 L
ISLAND n o KEY MAP
d KEY MAP r o G TTT -
0 0 3 3 1 4
1 Notes 2 1
\ Coordinate System: NAD 1983 UTM Zone 12N s 1. e TTT s a b 2. Basemapping: CANVEC © Department of a t a Natural Resources Canada. All rights reserved. D \ t m 3. Geonames from GeoBase®, Downloaded March 2013. g m
_ TTT e s 4. Orthoimagery © MapMart, 2011. a b _ a t 5. Not all features included in the legend are visable a d
_ within the map extent
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e
v Public Works and i t c o a
z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.1-5 k 3 r 2 o - Title 2 0 0 w 0 5 5 \ - 4 4 1 5 0 10 20 5 5 0 1 f 8 8 - 0 Camlaren - Zenith Island 9 9
4 m 2
6 6 0 : 0 d
1 1:600 e d s i Areas Requiring Remediation v C \ e \ R 386700 386750 386800 386850 390000 390500 391000
± Legend Watercourse
Gordon Lake d x m . w e i v r e v O _ n a l P e t i S _ 1 -
2 Old Mill . A g i
F Area _ P A R _ d n a l s I t n r u B _ 0 0 3 3 1 4 1 0 0 2 0 0 1 5 5 \ 4 4
d Waste 9 9 n
9 Shaft 9 a 6 6 l s
I Rock Area t Tailings Area n r u B
\ Impoundment n a l P n o i t c A l a i Burnt Island d Try Me e m e R
\ Goodrock D Gordon X Lake
M Murray
\ Storm g n i
w Camlaren a r D \ e n i Knutsen M s Northwest Kidney e Camp k Pond a Territories L n o Treacy West Bay d r o G
KEY MAP -
0 0 3 3 1 4 1
2 Notes 1 \
s 1. Coordinate System: NAD 1983 UTM Zone 12N e s a b 2. Basemapping: CANVEC © Department of a t a Natural Resources Canada. All rights reserved. D \ t m 3. Geonames from GeoBase®, Downloaded March 2013. g m _ e s 4. Orthoimagery © MapMart, 2011. a b _ a t 5. Not all features included in the legend are visable a d
_ within the map extent.
2 February 2015
1 Old Saw 0 121413300 0 4
1 Mill 2 Client/Project 2 1 \
e Public Works and v i t c Government Services Canada o a z \ n 1 e Gordon Lake Gap Analysis 2 c 2 s 1 e r 0 c \ e p Figure No. u d t o
0 0 : r 0 0 y g 0 0 B _ A.2-1
4 4 k 3 r 9 9 2 o 9 9 - Title 6 6 2 w 0 \ - 1 5 0 100 200 0 1 f - 0 Burnt Island
4 m 2
0 : 0 d
1 1:4,000 e d s i Mine Site - Overview v C \ e \ R 390000 390500 391000 390550 390600 390650 390700 TTT
± Legend ¡¢ Burn Pit Wet Area
43 Debris Tailings
UW Drum Shaft/Portal
:9 Structure Remains Waste Rock/Ore 0 0 5 5 5 5 4 4
9 9 TTT Trench Watercourse 9 9 6 6 Area Requiring Remediation d x m . a e r A t f a h S _ n a l P e t i S _ O S _ 2 - 2 . A g i F _ P A R _ d n a l s I t n r u B _ 0 0 3 3 1 4 1 2 1 \ d n a l s I t n r 0 0 u 0 0 B 5 5 \ 4 4 9 9 n 9 9 a l 6 6 P n o i t c A l a i d WASTE e
m ROCK e
R AREA \ OLD MILL D
X AREA M \ g n i w a r KNUTSEN D TAILINGS \ CAMP e IMPOUNDMENT n i M s
e OLD k SHAFT a SAW L
AREA n MILL o d r KEY MAP
o Gordon Lake G
-
0
0 Notes 3 3
1 Coordinate System: NAD 1983 UTM Zone 12N
4 1. 1 2 1 \ s 2. Basemapping: CANVEC © Department of e s
a Natural Resources Canada. All rights reserved. b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m g 4. Orthoimagery © MapMart, 2011. m _ e s
a 5. Not all features included in the legend are visable b 0 0 _
5 5 within the map extent a 4 4 t 4 4 a 9 9 d 9 9 _ 6 6
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v
i Public Works and t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.2-2 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 10 20 0 1 f - 0 Burnt Island - Shaft Area
4 m 2
0 : 0 d
1 1:600 e d s i Areas Requiring Remediation v C \ e \ R 390550 390600 390650 390700 390700 390800 TTT ¡¢
± Legend TTT ¡¢ Burn Pit Wet Area 43 Debris Tailings TTT TTT TTT UW Drum Shaft/Portal TTT :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation d x m . a e r A k c o R e t s a W _ n a l P e t i S _ O S _ 3 - 2 . A g i F _ P A R _ d n a l s I t n r u B _ 0 0 3 3 1 4 1 2 1 \ d n a l s I t n r u B \ n a l P n o i t c 0 0 A l 0 0
5 5 WASTE a i 4 4 d 9 9 ROCK e 9 9 6 6 m AREA e OLD MILL R \ AREA D X M \ g n i w KNUTSEN a
r TAILINGS CAMP D
\ IMPOUNDMENT e n i M
OLD s SHAFT e SAW k AREA a
L MILL n KEY MAP o Gordon Lake d r o G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1 \
s 2. Basemapping: CANVEC © Department of e s Natural Resources Canada. All rights reserved. a b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m Orthoimagery © MapMart, 2011. g 4. m _ e s 5. Not all features included in the legend are visable a b
_ within the map extent a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v Public Works and i t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g 0 25 50 B _ A.2-3 k 3 r m 2 o - Title 2 w 0
\ 1:700 - 1 5 0 1 f - 0 Burnt Island - Waste Rock Area 4 2
0 : 0 d 1 e d s i Areas Requiring Remediation v C \ e \ R 390700 390800 390800 390850 390900 390950
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation 0 0 5 5 6 6 4 4 9 9 9 9 d 6 6 x m . a e r A l l i M d l Gordon O _ n Lake a l P e t i S _ O S _ 4 - 2 . A g i F _ P A R _ d n a l s I t n r u B _ 0 0 3 3 1 4 1 2 1 \ d n a l s I t n r u B \ n a l P n o i t c A l a i d e m WASTE e R
\ ROCK D
X AREA
M OLD MILL \ g AREA n i 0 0 w 0 0 a r 6 6 4 4 D 9 9 \ 9 9 e
6 6 KNUTSEN n i TAILINGS
M CAMP
s IMPOUNDMENT e k a
L ¡¢ OLD
n SHAFT o SAW
d AREA r
o MILL G
KEY MAP -
Gordon Lake 0 0 3 3
1 Notes 4 1
2 1. Coordinate System: NAD 1983 UTM Zone 12N 1 \ s e s 2. Basemapping: CANVEC © Department of a b Natural Resources Canada. All rights reserved. a t a D \ t 3. Geonames from GeoBase®, Downloaded March 2013. m g m
_ 4. Orthoimagery © MapMart, 2011. e s a b
_ 5. Not all features included in the legend are visable a t within the map extent a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \
e Public Works and v i t c Government Services Canada o a z \ n 1
e Gordon Lake Gap Analysis 2 c 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g 0 10 20 B _ A.2-4 k 3 r m 2 o - Title 2 w 0
\ 1:500 - 1 5 0 1 f - 0 Burnt Island - Old Mill Area 4 2
0 : 0 d 1 e d 0 0 s i Areas Requiring Remediation 5 5 v C 5 5 \ e 4 4 \ R 9 9 9 9
6 390800 390850 390900 390950 6 391500 392000 392500
Legend 0 0
0 ± 0 5 5 1 1
9 9 Watercourse 9 9 6 6
Camp Area
Gordon Lake d x m . w e i v r e v O _ n a l P e t i S _ 1 - 3 . A g i F _ P A R _ k c o r d o o G _ 0 0 3 3 1 4 1 2 1 \ k c o r d Burnt Island
o Try Me o G \ n a l Goodrock
P Gordon n Lake o Murray i t
c Storm A l a i Camlaren d e m 0 0 e 0 0 R 0 0 \ 1 1 D 9 9
X Kidney
9 9 Northwest 6 6 M
\ Pond
g Territories n i w Treacy West Bay a r D
\ KEY MAP e n i M s e k a L n o d r o G
- Mill Area 0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1
\ 2.
s Basemapping: CANVEC © Department of e s Natural Resources Canada. All rights reserved. a b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. Orthoimagery © MapMart, 2011. g m _ e s 5. Not all features included in the legend are visable a b
_ within the map extent a t a d
_ Whiskey
2 February 2015 1
0 Jack Lake 121413300 0 4 1
2 Client/Project 2 1 \
e Public Works and v i t c Government Services Canada o a z \ n 1 e Gordon Lake Gap Analysis 2 c 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.3-1 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 100 200 0 1 f - 0 m Goodrock 4 2
0 : 0 d
1 1:4,000 e d s i Mine Site - Overview v C \ e \ R 391500 392000 392500 391700 391800 391900 392000 392100 392200
± Legend Burn Pit Wet Area
0 0 ¡¢ 0 0 1 1 1 1
9 9 43 Debris Tailings 9 9 6 6 UW Drum Shaft/Portal
:9 Structure Remains Waste Rock/Ore Gordon Lake TTT Trench Watercourse Area Requiring Remediation d x m . a e r A l 0 0 l i 0 0 0 0 M 1 1 _ 9 9 n :9 9 9 a l 6 6 P e t i S _ O S _ 2 - 3 . A g i F _ P A R _ k c o r d o o G _ 0 0 3 3 1 4 1 2 1 \ k c o r 0 0 d 0 0 o 9 9 o 0 0 G 9 9 \ 9 9 6 6 n a l P n o i t c A l a i d e m e CAMP R
\ AREA D X M \ g n i w a r D \
e ¡¢ MILL n i AREA M s e k a L TTT 43 n o 0 0 d r 0 0 o TTT 8 8 KEY MAP 0 0 G
9 9 -
9 TTT 9 0 6 6
0 43 3 3 1 4
1 Notes 2
1 TTT
\ 1. Coordinate System: NAD 1983 UTM Zone 12N s e s a TTT b 2. Basemapping: CANVEC © Department of a t Natural Resources Canada. All rights reserved. a D \ t
m 3. Geonames from GeoBase®, Downloaded March 2013. g m
_ Whiskey e
s 4. Orthoimagery © MapMart, 2011.
a Jack Lake b _ a t 5. Not all features included in the legend are visable a d within the map extent _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 0 0 \ 0 0 7 7 e Public Works and 0 0 v i 9 9 t 9 9 c o
6 6 Government Services Canada a z \ n 1 e
2 Gordon Lake Gap Analysis c 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.3-2 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 25 50 0 1 f - 0 Goodrock - Mill Area
4 m 2
0 : 0 d
1 1:2,000 e d s i Areas Requiring Remediation v C \ e \ R 391700 391800 391900 392000 392100 392200 381000 381500 382000 382500
± Legend Watercourse
Sentinel Lake
Kidney Pond 0 0 d 0 0 x 0 0 3 3 m Area . 8 8 9 9 w 6 6 e i v r e v O _ n a l P e
t Kidney i S _
1 Pond - 4 . A g i F _ P A R _ y e n d i K _ 0 0 3 3
1 Northwest 4 Portal 1 2
1 Portal Area \ Area y e n d i K
\ Middle n
a Try Me Burnt Island l
P Pond n o i t c
A Goodrock l Gordon a i Lake d 1983 Murray e Storm m e Camp R Camlaren \ D X M \ g n i Kidney
w Northwest 0 0 a 0 0 r 1939
5 5 Pond D
2 2 Territories \ 8 8 e 9 Camp 9 6 6 n Treacy i West Bay M s e KEY MAP k a L n o d r o G
-
0 0 3 3
1 Notes 4 1 2
1 Exploration 1. Coordinate System: NAD 1983 UTM Zone 12N \ s e s Camp a 2. Basemapping: CANVEC © Department of b a
t Natural Resources Canada. All rights reserved. a D \ t 3. Geonames from GeoBase®, Downloaded March 2013. m g Gordon m _ 4. Orthoimagery © MapMart, 2011. e s Lake a b _ 5. Not all features included in the legend are visable a t a within the map extent d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v Public Works and i t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d 0 0 t o
: 0 0 r y 0 0 g 2 2 B _ A.4-1
8 8 k 3 r 9 9 2 o 6 6 - Title 2 w 0 \ - 1 5 0 200 400 0 1 f - 0 m Kidney Pond 4 2
0 : 0 d
1 1:6,000 e d s i Mine Site - Overview v C \ e \ R 381000 381500 382000 382500 380850 380900 380950 381000 381050
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings 0 0 UW 0 0 Drum Shaft/Portal 7 7 2 2 8 8 9 9 :9 6 6 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation d x m . p m a C 3 8 9 1 _ n a l P e
t 43 i 43 S
_ :9 O S _ 0 0 2 - 5 5
4 43 6 6 . 2 2 A 8 8 g 9 9 i F 6 6 _
P ¡¢ A R _ y e
n ¡¢ d i
K 43 _
0 ¡¢ 0 3 3 1 4 1 2 1 \ y Gordon ¡¢¡¢ e n
d Lake i K \ n 43 a l P n 43 o i t c
A ¡¢ l a i ¡¢ 43 d e KIDNEY m e POND AREA R \ D
X NORTHWEST M
\ PORTAL AREA g PORTAL n i 1983 AREA w 0 0 a 0 0 r 43 CAMP
6 6 1939 D 2 2 \ 8 8 e CAMP 9 9 n 6 6 i :9
M EXPLORATION s
e CAMP k a L
n KEY MAP o d r o 43 G
-
0 0 3 3
1 Notes 4 1
2 1. Coordinate System: NAD 1983 UTM Zone 12N 1 \ s e s 2. a Basemapping: CANVEC © Department of b
a Natural Resources Canada. All rights reserved. t a D \ t 3. Geonames from GeoBase®, Downloaded March 2013. m g m
_ 4. Orthoimagery © MapMart, 2011. e s a b
_ 5. Not all features included in the legend are visable a t
a within the map extent d _
2 February 2015 1
0 121413300 0 0 0 4 5 5 1 5 5 2 Client/Project 2 2 2 8 8 1 9 9 \ 6 6 e v Public Works and i t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.4-2 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 1 f - 0 0 10 20 Kidney Pond - 1983 Camp 4 2
0 : 0
d m 1 e d s i Areas Requiring Remediation v
C 1:800 \ e \ R 380850 380900 380950 381000 381050 382350 382400 382450
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore
TTT Trench Watercourse Area Requiring Remediation Gordon Lake d x m . p 43 m a C n o i t a r o l p x E 0 0 _ 5 5 n 3 3 a 2 2 l 8 8 P 9 9 e 6 6 t i S _ O S _ 3 - 4 . A g i F _ P A R _ y e n d i
K TTT _ 0 0
3 TTT 3 1 4 1 2 1 \ y e n 43 TTT d i K \ n a l P n :9 o i t
c 43 A l a i d e KIDNEY m e POND AREA R
\ :9 D X NORTHWEST M \
g PORTAL AREA TTT PORTAL n i
w 1983 AREA a r CAMP
D 1939 \ e CAMP n i 43
M EXPLORATION s e CAMP k a L n
o KEY MAP d r o G
-
0 0 3 0 0 3 0 0 1 3 3 4 2 2 1 8 8 2 Notes 9 9 1 6 6 \ s 1. Coordinate System: NAD 1983 UTM Zone 12N e s a b :9 a 2. Basemapping: CANVEC © Department of t a Natural Resources Canada. All rights reserved. D \ t m g 3. Geonames from GeoBase®, Downloaded March 2013. m _ e s Orthoimagery © MapMart, 2011.
a 4. b _ a t Not all features included in the legend are visable a 5.
d 43
_ within the map extent
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1
\ :9 e
v Public Works and i t c o a
z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.4-3 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 1 f - 0 0 10 20 Kidney Pond - Exploration Camp 4 2
0 : 0
d m 1 e d s i Areas Requiring Remediation v
C 1:500 \ e \ R 382350 382400 382450 381600 381700 381800 381900 Sentinel Lake Sentinel Lake
43 ± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW
0 0 Drum Shaft/Portal 0 0 8 8 2 2
8 8 :9
9 9 Structure Remains Waste Rock/Ore 6 6 TTT Trench Watercourse 43 Area Requiring Remediation 43 43 ¡¢ d x m . a e r A l a t r o P _ n a l P e t i S _ O S _ 4 - 4 . A g i F _ P A R _ y e n d i K _ 0 0 3 3 0 0 1 0 0 4 7 7 1 2 2 2 8 8 1 9 9 \ 6 6 y Middle e n d i Pond K \ n a l P n o i t c A l a i d KIDNEY e m POND AREA e R \ D
X NORTHWEST
M PORTAL AREA \ PORTAL g n i 1983 AREA w
a CAMP r 1939 D
\ CAMP e n i EXPLORATION M
s CAMP e k a L
n KEY MAP o d r o G
-
0 0 3 3
1 Notes 4 1 2
1 1. Coordinate System: NAD 1983 UTM Zone 12N \ s e s a 2. Basemapping: CANVEC © Department of b a t Natural Resources Canada. All rights reserved. a D \ t
0 0 Geonames from GeoBase®, Downloaded March 2013. m 3. 0 0 g 6 6 2 2 m 8 8 _ 9 9 e
6 6 4. Orthoimagery © MapMart, 2011. s a b _
a 5. Not all features included in the legend are visable t a within the map extent d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \
e Public Works and v i t c
o Government Services Canada a z \ n 1 e Gordon Lake Gap Analysis 2 c 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.4-4 k 3 r Gordon 2 o - Title 2 w 0
\ Lake - 1 5 0 1 f - 0 0 Gordon 25 50 Kidney Pond - Portal Area 4 2
0 : 0
d Lake m 1 e d s i Areas Requiring Remediation v
C 1:1,200 \ e \ R 381600 381700 381800 381900 381450 381500 381550
43 ± Legend ¡¢ Burn Pit Wet Area 43 43 Debris Tailings TTT TTT UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore 0 0 0 0 8 8 2 2
8 8 TTT Trench Watercourse 9 9 6 6 Area Requiring Remediation
43 ¡¢ TTT 43 43
43
43 d x m . a e r A l a t r o P t s e 0 0 w 5 5 h 43 t 7 7 r 2 2 o 8 8 9 9 N KIDNEY 6 6 _ n POND AREA a l P e t i
S NORTHWEST _
O PORTAL AREA PORTAL S _
5 1983 AREA - 4 . CAMP
A 1939 g i
F CAMP _ P UW EXPLORATION A R
_ CAMP y e n d i KEY MAP K
_ 43 0 0 3 3 1 4 1 2
1 43
\ Notes y e
n 1. Coordinate System: NAD 1983 UTM Zone 12N d i K \ n 2. Basemapping: CANVEC © Department of a l
P Natural Resources Canada. All rights reserved. n o i t c
A 3. Geonames from GeoBase®, Downloaded March 2013. l a i d e 4. Orthoimagery © MapMart, 2011. m 43 e R \ 5.
D Not all features included in the legend are visable X within the map extent M \ February 2015 e n i 121413300 M e k Client/Project a L n Public Works and o d r o o Government Services Canada z G n \ e
p Gordon Lake Gap Analysis c s o t e k r s c e e Figure No. D d 0 0 \ t
0 0 : o 7 7 z y 2 2 n B A.4-5
8 8 e 3 9 9 c 2 6 6 s - Title 2 e r 0 - c 5 e 1 d 0 t 0 10 20 Kidney Pond - Northwest Portal Area 2 \ s : r
d m e e s s i
U Areas Requiring Remediation
v 1:500 \ : e C R 381450 381500 381550 381200 381300 381400 381500 381600
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore
TTT Trench Watercourse Area Requiring Remediation 0 0 0 0 1 1 3 3 8 8 d 9 9 x 6 6 m .
a Sentinel e r
A Lake d n o P y e n d i K _ n a l P e t i S _ O S _ 6 - 4 . A g i F _ P A R _ y e n d i K _ 0 0 3 3 1 4 1 2 1 \ y e
n 43 TTT d 0 0 i 0 0 K 0 0 \ 3 3 n
8 43 8
a ¡¢ l 9 9 6 6 P 43 :9 n o i t c
A :9 l a i d e TTT :9 :9 m e R
\ TTT KIDNEY
D :9 X ¡¢ POND AREA M :9 \ g n i NORTHWEST w
a PORTAL AREA r PORTAL
D 43 \ 1983 AREA e n i CAMP 1939 M
s CAMP e k Gordon a EXPLORATION L :9 n Lake CAMP o d r o KEY MAP G
-
0 0 3 3 1 4
1 Notes
2 Kidney
1 ¡¢
\ 1. Coordinate System: NAD 1983 UTM Zone 12N s Pond e s a 0 0 b 2. Basemapping: CANVEC © Department of 0 0 a t 9 9 2 2 a Natural Resources Canada. All rights reserved. 8 8 D 9 9 \ 6 6 t m 3. Geonames from GeoBase®, Downloaded March 2013. g m
_ 43 e s 4. Orthoimagery © MapMart, 2011. a b _ a t 5. Not all features included in the legend are visable a d within the map extent _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e 43 Public Works and v i t c
o Government Services Canada a z \ n
1 :9 e
2 Gordon Lake Gap Analysis c 2 s 1 e r 0 c \ e p Figure No.
u 43 d t o
: r 43 y g B _ A.4-6 k 3 r 2 o 43 - Title 2 w 0 \ - 1 5 0 1 f - 0 0 25 50 Kidney Pond - Kidney Pond Area 4 2
0 : 0 d 43 m 1 e d s i Areas Requiring Remediation v
C 43 1:1,500
\ e TTT
\ R TTT 381200 381300 381400 381500 381600 377500 378000 378500 379000 0 0 0 0 0 0 0 0 9 9
9 Murray 9 6 6 Lake ± Legend Watercourse
1938/2008 Camps d x m . w e i v r e v O 0 0 _ 0 0 n 5 5 a 9 9 l 8 8 P 9 9 e t 6 6 i S _ 1 - 5 . A g i F _ P A R _ y a r r u M _ 0 0 3 3 1 4 1 2 1 \ y a r r u M \ n a l Burnt Island P Try Me n o i t c A l Goodrock a Gordon i d Lake e Murray m Storm e R
\ Camlaren D X M \ g n i w Kidney a Northwest r
D Pond \ Territories e 0 0 n i 0 0 Treacy 0 0 M West Bay
9 9 s 8 8 e 9 9 k 6 6 KEY MAP a L n o d r o G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N
4 Trench 1 2 1
\ Area s 2. Basemapping: CANVEC © Department of e s Natural Resources Canada. All rights reserved. a b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m Orthoimagery © MapMart, 2011. g 4. m _ e s 5. Not all features included in the legend are visable a b
_ within the map extent a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v
i Public Works and t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p 0 0 u d Figure No. t 0 0 o
: r 5 5 y 8 8 g B _ 8 8 k 9 9
3 A.5-1 r 6 6 2 o - 2 w Title 0 \ - 1 5
0 0 200 400 1 f - 0 4
2 m
Murray 0 : 0 d
1 1:6,500 e d s i v C Mine Site - Overview \ e \ R 377500 378000 378500 379000 378000 378250 378500 378750
± Legend
0 0 ¡¢ Burn Pit Wet Area 5 5 2 2
0 0 43 9 9 Debris Tailings 9 9 6 6 UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation d x m . p m a C 8 0 0 2 _ 8 3 9 1 _ n a l P e t i S _ O S
_ Murray 2 - 5 . Lake A g i F _ P A R _ y a 0 0 r r 0 0 0 0 u 0 0 M 9 9 _ 9 9 0 6 6 0 3 3 1 4 1 2 1 \ y a r r u M \ n a l P n o i t c A l a i 1938/2008 d e CAMPS m e R \ D X M \ g n i w a r D \ e TRENCH n i AREA M s e k a L n KEY MAP o d r o G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1
\ 2. s Basemapping: CANVEC © Department of e 0 0 s Natural Resources Canada. All rights reserved. 5 5 a 7 7 b 9 9 a 8 8 t 9 9 a
6 6 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. Orthoimagery © MapMart, 2011. g m _ e s 5. Not all features included in the legend are visable a b
_ within the map extent a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v i Public Works and t c o a z Government Services Canada \ n 1 e 2 c 2 s Gordon Lake Gap Analysis 1 e r 0 c \ e p u d Figure No. t o
: r y g B _ k
3 A.5-2 r 2 o - 2 w Title 0 \ - 1 5 0 50 100 0 1 f - 0
4 m 2
Murray Lake - 1938/2008 Camp 0 : 0 d
1 1:3,000 e d s i v C Areas Requiring Remediation \ e \ R 378000 378250 378500 378750 377500 378000 378500
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation d x m . a e r A h c n e r T _ n a l P e t i S _ 3 0 g i F _ 0 0 O S 0 0 _ 0 0 3 9 9 - 8 8 5 . 9 9 6 6 A g i F _ P A R _ y a r r u M _ 0 0 3 3 1 4 1 2 1 \ y a r r u M \ n a l P n o i t c A l a i d e m e R
\ 1938/2008 D Murray X CAMPS M
\ Lake g n i w a r D \ e n i M s e k a TRENCH L
n AREA o d r o G
-
0 KEY MAP 0 3 3 1 4 1
2 Notes 1 \ s 1. Coordinate System: NAD 1983 UTM Zone 12N e s a b a 2. Basemapping: CANVEC © Department of t a Natural Resources Canada. All rights reserved. D \ t m g 3. Geonames from GeoBase®, Downloaded March 2013. m _ e s Orthoimagery © MapMart, 2011. a 4. b _ a t Not all features included in the legend are visable a 5. d
_ within the map extent
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v Public Works and i t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 0 0 1 0 0 e r 0 5 5 c \ 8 8 e 8 8 p 9 9 u d Figure No. t 6 6 o
: r y g B _ k
3 A.5-3 r 2 o - 2 w Title 0 \ -
1 0 100 200 5 0 1 f - 0 m 4 2
Murray Lake - Trench Area 0 : 0 d
1 1:3,500 e d s i v C Areas Requiring Remediation \ e \ R 377500 378000 378500 391000 391500 392000 392500
Legend
0 ± 0 0 0 Watercourse 0 0 9 9 8 8 9 9 6 6 Gordon Lake d x m . w e i v r e v O _ Camp n a l P
e Area t i S _ 1 - 6 . A g i F _ P A R _ m r o t S 0 0 _ 0 0 0 5 5 0 8 8 3 8 8 3 9 9 1 6 6 4 1 2 1 \ m r o t S \ n Try Me Burnt Island a l P n o i t c Goodrock A Gordon l a i Murray Lake d e Storm m e
R Camlaren \ D X M \ g n i Northwest Kidney w a r Territories Pond D \ e Treacy n i West Bay M s
e KEY MAP k a L n o d r o G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1
\ 2. Basemapping: CANVEC © Department of s e s Natural Resources Canada. All rights reserved. a b a t
a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. Orthoimagery © MapMart, 2011. g 0 0 m Shaft 0 0 _ 0 0 e 8 8 s 5. Not all features included in the legend are visable 8 8 a Area 9 9 b
6 6 within the map extent _ a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e
v Public Works and i t c o a
z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.6-1 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 1 f 0 200 400 - 0 Storm 4 2
0
: m 0 d 1 e d s 1:5,500 i Mine Site - Overview v C \ e \ R 391000 391500 392000 392500 392300 392400 392500
0 0 Legend 0 0 1 1 8 8
8 8 ¡¢ Burn Pit Wet Area
9 ± 9 6 6 43 Debris Tailings UW Drum Trench/Shaft :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation d x m . 43 a e r A t f a h S _ n a l P e t i S _ O S _ 2 - 6 . A g i :9 F _ P A R _ m r o t S _ 0 0 3 3 1 4 1 2 1 \ m r o t S \ n
a :9 l
P TTT n o i
t TTT c A l a i d 0 TTT 0 0 0 e 0 0 m 8 8 CAMP e 8 8 R 9 9 AREA 6 6 \ D X M \ g n i w a r D \ e n i M
s SHAFT e k AREA a L n o d r KEY MAP o 43 G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1 \
s 2. Basemapping: CANVEC © Department of e s Natural Resources Canada. All rights reserved. a b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. Orthoimagery © MapMart, 2011. g m _ e s 5. Not all features included in the legend are visable a b
_ within the map extent a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e Public Works and v i t c
o Government Services Canada a z \ n 1 e
2 Gordon Lake Gap Analysis c 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.6-2 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 1 f 0 25 50 - 0 Storm - Shaft Area 4 2
0
: m 0 d 1 e d s 1:800 i Areas Requiring Remediation v C \ e \ R 392300 392400 392500 381300 381400 381500 381600 381700
Legend
0 ± 0 0 0
3 3 Watercourse 1 1 8 8 9 9 6 6
Gordon d x Lake m . w e i v r e 0 0 v 0 0 2 2 O 1 1 _ 8 8 n 9 9 a l 6 6 P e t i S _ 1 - 7 . A g i F
_ Mill P A
R Area _ y c a e r T _ 0 0 3 3 1 4 1 2 1 \ y c a e r T \ n Try Me Burnt Island a l P n o i t c GordonGoodrock A l a i Murray Lake d
e Storm m e 0 0
R Camlaren 0 0 \ 1 1 D 1 1 8 8 X 9 9 M 6 6 \ g n i Northwest Kidney w a r Territories Pond D \ e Treacy n
i West Bay M s KEY MAP e k a L n o d r o Camp G
-
0
0 Area Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1 \
s 2. Basemapping: CANVEC © Department of e s Natural Resources Canada. All rights reserved. a b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. g Orthoimagery © MapMart, 2011. m _ e s 5. Not all features included in the legend are visable a 0 0 b 0 0
_ within the map extent 0 0 a 1 1 t 8 8 a 9 9 d 6 6 _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e
v Public Works and i t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.7-1 k 3 r Gordon 2 o - Title 2 w 0
\ Lake - 1 5 0 1 f 0 25 50 - 0 Treacy 4 2
0
: m 0 d 1 e d s 1:1,600 i Mine Site - Overview v C \ e \ R 381300 381400 381500 381600 381700 381300 381400 381500
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Trench/Shaft :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation d x m . a e r A l l i M _ n a l P e t i S _ O S _ 2 - 7 . A g i 0 0 F 0 0 _ 2 2 P 1 1 A 8 8 R 9 9 _ 6 Gordon 6 y c a Lake e r T _ 0 0 3 3 1 4 1 2 1 \ y c a e r T \ n a l P n o i t c A l a i d e
m ¡¢ e R \ D X
M MILL \ g AREA n i w a r D \ e n i M
s CAMP e k AREA a L n o d r o G
-
0 KEY MAP 0 3 3 1 4 1 2
1 Notes \ s e 1. Coordinate System: NAD 1983 UTM Zone 12N s a b a t 2. Basemapping: CANVEC © Department of a
D Natural Resources Canada. All rights reserved. \ t m g 3. Geonames from GeoBase®, Downloaded March 2013. m _ e s a
b 4. Orthoimagery © MapMart, 2011. _ a t a
d 5. Not all features included in the legend are visable _
2 within the map extent February 2015 1
0 121413300 0 4
1 Gordon 2 Client/Project 2 1 Lake \ e
v Public Works and i t c o a
z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g 0 0 B _ A.7-2
0 0 k 3 r 1 1 2 o 1 1 - Title 8 8 2 w 9 9 0 \ - 6 6 1 5 0 1 f 0 25 50 - 0 Treacy Mine - Mill Area 4 2
0
: m 0 d 1 e d s 1:700 i Areas Requiring Remediation v C \ e \ R 381300 381400 381500 43 43 :9 381250 381300 381350
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal 0 0 0 0 1 1 1 1 :9 8 8 Structure Remains Waste Rock/Ore 9 9 6 6 TTT Trench Watercourse Area Requiring Remediation
Gordon #* d x Lake 43 m
. 43 a
e :9 r A p m a C _
n 43 a l P e t i S _
O UW
S ^E _ 3 - 7 . A g i
F 43 _ P A R _ y c a e
r :9 T _ 0 0 3 3 1
4 43 1 2 1 \ y 43 c a e r T \ n a l P n o i t c #* A l :9 a i d
e 43 m e R \ D X
M Gordon
\ MILL g n i 43 AREA Lake w a r D 0 0 \ 5 5 e 0 0 n 1 1 i 8 8 M 9 9 s 6 6 CAMP e k AREA a L n o d r o G
-
0 KEY MAP 0 3
3 !(
1 ^ 4 1 2
1 Notes \ s e s 1. Coordinate System: NAD 1983 UTM Zone 12N a b a t
a 2. Basemapping: CANVEC © Department of D
\ Natural Resources Canada. All rights reserved. t m g
m 3. Geonames from GeoBase®, Downloaded March 2013. _ e s a b 4. Orthoimagery © MapMart, 2011. _ a t a d 5. Not all features included in the legend are visable _
2 February 2015
1 within the map extent
0 121413300 0 4 1
2 Client/Project 2 1 \ e v
i Public Works and t c o a z Government Services Canada \ n 1 e 2
c Gordon Lake Gap Analysis 2 s 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.7-3 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 1 f 0 10 20 - 0 Treacy Mine - Camp Area 4 2
0
: m 0 d 1 e d s 1:400 i Areas Requiring Remediation v C \ e \ R 381250 381300 381350 374250 374500 374750 375000
± Legend Watercourse 0 0 5 5 7 7 5 5 9 9 9 9 6 6 d x Mac Lake m . w e i v
r WESTERN e v
O CAMP _ n a l P e t i S _ 1 - 8 . A g i
F Mac Lake _ P A R _ e M y r T _ 0 0 3 3 1 4 1 2 1 \ e MAIN M Try Me Burnt Island y r
T CAMP \ n a l
P Goodrock
n Gordon o i t Murray Lake c
A Storm l a i d Camlaren e m e R \ D X Kidney
M Northwest \ g Pond
n Territories i w
a Treacy r West Bay D \ e KEY MAP n i 0 0 M
0 0 s 5 5 e 5 5 k 9 9 a 9 9 L 6 6 n o d r o G
-
0 Notes 0 3 3 1. Coordinate System: NAD 1983 UTM Zone 12N 1 4 1 2
1 2. \ Basemapping: CANVEC © Department of s e
s Natural Resources Canada. All rights reserved. a b a t 3.
a Geonames from GeoBase®, Downloaded March 2013. D \ t
m 4. Orthoimagery © MapMart, 2011. g m _ e s 5. Not all features included in the legend are visable a b within the map extent _ a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v i Public Works and t c o a z Government Services Canada \ n 1 e 2 c
2 Gordon Lake Gap Analysis s 1 e r 0 c \ e p u d Figure No. t o
: r y g B _ k
3 A.8-1 r 2 o - 2 w Title 0 \ - 1 5 0 50 100 0 1 f - 0
4 m 2
Try Me 0 : 0 d
1 1:2,500 e d s i v C Mine Site - Overview \ e \ R 374250 374500 374750 375000 386250 386500 386750 387000
Legend 0 0 5 5
7 ± 7 8 8 7 7
9 9 Watercourse 6 6
North Area d x m . w e i v r e v O _ n a l P e t i S _ 1 - 9 . A g i F _ P A R _ 0 0 y 0 0 a 5 5 B 8 8 t 7 7 s 9 9 e 6 6 W _ 0 0 3 3 1 4 1 2 1 \ y a Gordon B t s
e Lake W \ n a l P Burnt Island n Try Me o i t c A l a i GordonGoodrock d e Murray Lake m e Storm R \
D Camlaren X M \ g n i w a r Northwest Kidney D
\ Pond e Territories n i M
Treacy s West Bay e k a
L KEY MAP n o d r o G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 0 0 2 5 5 1 2 2 \ 8 8 2. s Basemapping: CANVEC © Department of 7 7 e 9 9 s
6 6 Natural Resources Canada. All rights reserved. a b a t a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. Orthoimagery © MapMart, 2011. g m _ e s South 5. Not all features included in the legend are visable a b _ Area within the map extent a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e Public Works and v i t c
o Government Services Canada a z \ n 1 e
2 Gordon Lake Gap Analysis c 2 s 1 e r 0 c \ e p u d Figure No. t o
: r y g B _ k
3 A.9-1 r 2 o - 2 w Title 0 \ - 1 5
0 0 50 100 1 f - 0 4
2 m
West Bay 0 : 0 d
1 1:3,000 e d s i v C Mine Site - Overview \ e \ R 386250 386500 386750 387000 386400 386500 386600 386700 386800
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Shaft/Portal :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation 0 0 0 0 7 7 8 8 7 7 9 9 6 6 d x m . a e r A h t r o N _ n a l P e t i S _ O S _ 2 - 9 . A g i F _ P A R _ y a B t s e W _ 0 0 3 3 1 4 1 2 1 \ y a 0 0 B
0 0 t 6 6 s 8 8 e 7 7 W 9 9 6 6 \ n a l P n o i t c A l a i d e AREA 1 m e R \ D X M \ g n i Gordon w a r Lake D \
e AREA 2 n i M s e k a KEY MAP L n o d r o G
-
0
0 Notes 3 3
1 1. Coordinate System: NAD 1983 UTM Zone 12N 4 1 2 1
\ 2. s Basemapping: CANVEC © Department of 0 0 e 0 0 s
5 5 Natural Resources Canada. All rights reserved. a 8 8 b 7 7 9 9 a t 6 6 a 3. Geonames from GeoBase®, Downloaded March 2013. D \ t m 4. Orthoimagery © MapMart, 2011. g m _ e s 5. Not all features included in the legend are visable a b
_ within the map extent a t a d _
2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v i t Public Works and c o a z \ n Government Services Canada 1 e 2 c 2 s
1 Gordon Lake Gap Analysis e r 0 c \ e p u d Figure No. t o
: r y g B _ k
3 A.9-2 r 2 o - 2 w Title 0 \ -
1 0 25 50 5 0 1 f - 0 m 4 2
West Bay - North Area 0 : 0 d
1 1:1,500 e 0 0 d s i 0 0 v C
4 4 Areas Requiring Remediation \ e 8 8 \ R 7 7 9 9
6 386400 386500 386600 386700 386800 6 386400 386500 386600 386700 386800
± Legend ¡¢ Burn Pit Wet Area 43 Debris Tailings UW Drum Trench/Shaft :9 Structure Remains Waste Rock/Ore TTT Trench Watercourse Area Requiring Remediation 0 0 0 0 3 3 8 8 7 7 d 9 9 x 6 6 m . a e r A h t u o S _ n a l P e t i S _ O S _ 3 - 9 . A g i F _ P A R _ y a B t s e W _ 0
0 Gordon 3 3
1 Lake 4 1 2 1 \ y a B t s e W 0 0 \ 0 0 n 2 2 a l 8 8 P 7 7 n 9 9 6 6 o i t c A l a i d e m e R \ D X M
\ AREA 1 g n i w a r D \ e n i M s e k a L
n AREA 2 o d r o G
-
0 KEY MAP 0 3 3 1 4 1
2 Notes 1 \ s 1. Coordinate System: NAD 1983 UTM Zone 12N e s a b a 2. Basemapping: CANVEC © Department of t 0 0 a 0 0
1 1 Natural Resources Canada. All rights reserved. D 8 8 \ 7 7 t 9 9 m 6 6 g 3. Geonames from GeoBase®, Downloaded March 2013. m _ e s
a 4. Orthoimagery © MapMart, 2011. b _ a t
a 5. Not all features included in the legend are visable d
_ within the map extent 2 February 2015 1
0 121413300 0 4 1
2 Client/Project 2 1 \ e v i Public Works and t c o a z Government Services Canada \ n 1 e 2 c 2 s Gordon Lake Gap Analysis 1 e r 0 c \ e p Figure No. u d t o
: r y g B _ A.9-3 k 3 r 2 o - Title 2 w 0 \ - 1 5 0 25 50 0 1 f - 0 West Bay - South Area
4 m 2
0 : 0 d
1 1:1,500 e d s i Areas Requiring Remediation v C \ e \ R 386400 386500 386600 386700 386800 388100 388200 388300 388400
± Legend Proposed Containment Area 30m Buffer From Proposed Containment Area 0 0 0 0 1 1 6 6 8 8 9 9 6 6 d x m . n e r a l m a C _ a e 0 0 r 0 0 A 0 0 t 6 6 n 8 8 e 9 9 6 6 m n i a t n o C d e s o p NORTH o r
P CABIN _ 1 - 0 1 . A g i F
_ Gordon Lake P A
R MINE _ l a AREA n o i
t NORTH i d d MINE AREA A _
0 SOUTH 0 3 3
1 ZENITH 4 1
2 ISLAND 1 \ l KEY MAP a KEY MAP n o i t i Gordon d Notes d
A Lake
\ 1. Coordinate System: NAD 1983 UTM Zone 12N n a l P n 2. Basemapping: CANVEC © Department of o i t Natural Resources Canada. All rights reserved. c A l a i d
0 0 3. Geonames from GeoBase®, Downloaded March 2013. e 0 0 9 9 m 5 5 e 8 8 R 9 9 Orthoimagery © MapMart, 2011.
\ 4. 6 6 D X M
\ 5. Not all features included in the legend are visable February 2015 e n i within the map extent 121413300 M e k Client/Project a L n o Public Works and d r o o
z Government Services Canada G n \ e p
c Gordon Lake Gap Analysis s o t e k r s c e e Figure No. D d \ t
: o z y n B A.10-1 e 3 c 2 s - Title 2 e r 0 - c 0 25 50 5 e 1 d 0 t m Proposed Containment Area 2 \ s : r d e 1:1,300 e s s i U v \ : e C R 388100 388200 388300 388400 385000 386000 387000 388000
Legend 0 0
0 ± 0 0 0 0 0
8 8 Mine Site 9 9
6 6 *# Watercourse Potential Borrow Source
GD-39 0 0 0 0 0 0 9 9 7 7 9 9 6 6
Gordon Lake GD-38 d x m . y a B t s e W _
s West Bay e c r u *# Mine Site Try Me Burnt Island o S w o r r o Goodrock B Gordon l a i Lake t Murray n
e Storm t o
P Camlaren _ 2 - 0 1 . 0 0 0 0 A 0 0 g i 8 8 F 7 7 _ Kidney 9 9 Northwest P 6 6 A
R Territories Pond _ l a n Treacy
o West Bay i t i d
d KEY MAP A _ 0 0 3 3 1 4 1 2
1 Notes \ l a 1. Coordinate System: NAD 1983 UTM Zone 12N n o i t i d 2. Basemapping: CANVEC © Department of d A
\ Natural Resources Canada. All rights reserved. n a l P n 3. Geonames from GeoBase®, Downloaded March 2013. o i t c A l 4. Orthoimagery © MapMart, 2011. a i d e
m 5. Not all features included in the legend are visable e
R within the map extent \ D X M \ February 2015 e n i 121413300 M
0 0 e 0 0 k Client/Project 0 0 a 7 7 L 7 7
9 9 n
6 6 Public Works and o d r o o Government Services Canada z G n \ e
p Gordon Lake Gap Analysis c s o t e k r s c e e D
d Figure No. \ t
: o z y n B e
3 A.10-2 c 2 s - 2 e GD-37 r Title 0 - c 5 e
1 0 250 500 d 0 t 2 \ m Potential Borrow Sources s : r d e 1:15,000 e s s i U v \ GD-37, GD-38 and GD-39 : e C R 385000 386000 387000 388000 390000 390500 391000
0 0 Legend 0 0 0 0
5 ± 5 9 9 9 9 6 6 *# Mine Site Watercourse Potential Borrow Source d x m 0 0 . 0 0 d
5 Burnt Island 5 n 4 4 a 9 9 l 9 9 s I 6 6 t *# Mine Site n r u B _ s e c r u o S w o r r o
B Burnt Island
l Try Me a i
t GD-45 n e t o Goodrock P Gordon _
4 Lake - Murray 0
1 Storm . A g i Camlaren F _ P A R _ l a n
o Kidney i Northwest t i d Pond
d Territories
A Gordon _ 0 Treacy West Bay 0 Lake 3 3
1 KEY MAP 4 1 2 1 \ l a n o i
t Notes i d 1. Coordinate System: NAD 1983 UTM Zone 12N d A \ n a
l 2. Basemapping: CANVEC © Department of P n Natural Resources Canada. All rights reserved. o i t c A l 3. Geonames from GeoBase®, Downloaded March 2013. a i d e
m 4. Orthoimagery © MapMart, 2011. e R \ D
X 5. Not all features included in the legend are visable
M within the map extent. \ February 2015 e n i
0 0 121413300 0 0 M
0 0 4 4 e k 9 9 Client/Project 9 9 a 6 6 L
n Public Works and o d r
o Government Services Canada o z G n \
e Gordon Lake Gap Analysis p c s o t e k r s c e e Figure No. D d \ t
: o z y n B A.10-4 e 3 c 2 s - Title 2 e r 0 - c 5
e 0 100 200 1 d 0 t m Potential Borrow Source 2 \ s : r d e 1:5,000 e s s i
U GD-45 (Burnt Island) v \ : e C R 390000 390500 391000 375000 377500 380000 382500 385000 0 0 0 0 5 5 2 2 9 9 9 9 6 6 ± Legend *# Mine Site Watercourse Tibbit to Contwoyto Winter Road Winter Road Alignment (Unknown Conditions) Potential Borrow Source 0 0 0 0 0 0 0 0 9 9 9 9 6 6 d x m . e k a L y a r r u M _ s e c r 0 0 Try Me Burnt Island 0 0 u 5 5 o 7 7 S 8 8 w 9 9 o 6 6 r r Goodrock
o Gordon B l Lake
a Murray i t
n Storm e t o Camlaren P _ 6 - 0 1 . A g i F Northwest Kidney _ P Pond A Territories R _ l a Treacy
n West Bay o i t i d KEY MAP d A _ 0 0 3 3 1 4 1 2
1 Notes \ l a 1. Coordinate System: NAD 1983 UTM Zone 12N n o i t i d 2. Basemapping: CANVEC © Department of d A
\ Natural Resources Canada. All rights reserved. n a l 0 0 P 0 0 n 0 0 3. Geonames from GeoBase®, Downloaded March 2013. o 5 5 i t 8 8 9 9 c 6 6 A l 4. Microsoft product screen shot(s) reprinted with permission a i d from Microsoft Corporation e m e
R 5. Not all features included in the legend are visable \ D
X within the map extent M \ February 2015 e n i 121413300 M e k Client/Project a L n o Public Works and d r o o
z Government Services Canada G n \ e p c Gordon Lake Gap Analysis s o t e k r s c e e D d Figure No. t \
: o z y B n e
3 A.10-6 c 2 - s 2 e
r Title 0 - c 5 e 0 1,000 2,000 1 d 0 t
2 m \ Potential Borrow Sources : s r d e 1:40,000 e s s i U 0 0 v \ 0 0 GD-15, GD-16, GD-17, GD-18, : e 5 5 C R 2 2 8 8
9 375000 377500 380000 382500 385000 9 6 6 GD-19, GD-20 and GD-21