Landfill
Active
2010 Inspection; The Mine Operates An On-grade Landfill Site Which Is Located Within The Tailings Management Area. Materials Deposited Are Non-hazardous, Inert Wastes.
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592792
5373651
Open Pit
Active
Mattawasaga No. 1 Pit
2010 Inspection; The Pit Is Bounded By A Boulder Fence On The North And South Sides. Some Of The Boulders Are Less Than 0.60m Apart. The Depth Of The Pit Is Unknown But Reported To Be 'shallow'. Pit Walls Are Sloped 1:3 On T
17
594116
5373681
Open Pit
Active
Mattawasaga Extension Pit
2010 Inspection; The Pit Has A Boulder Fence On The North Side Along The Access Road To The Vent. The Boulders Are Spaced Closely Together But Not All Are Greater Than 2.0m In Height. Depth Of The Pit Is Unknown But Reported As
17
593995
5373630
Ore Stockpile
Active
2019 Ir: Ore Is Stockpilled Before Processing At The Mill. There Was No Ored Stockpiled At The Site At The Time Of Inspection. Ore From The Holloway Is Sometimes Stockpiled Here And Has Potential To Leach Arsenic And Have Ard Issues. Ore From The Taylor M
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593016
5373732
Ponds
Active
Polishing Pond
2010 Inspection; The Polishing Pond Is The Final Step In The Tailings Management System.
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594215
5368616
Ponds
Active
East Settling Pond
2010 Inspection; The East Pond Is Located On The East Side Of The Site Neaer The Sewage Treatment Plant. The East Pond Collects Surface Run-off As Well As Underground Mine Water. Water Collected From The Pond Is Directed To The Mill Fo
17
593137
5373815
Raise To Surface
Active
Raise #1
2010 Inspection; Fresh Air Ventilation Borehole West Of The Shaft. 3.om In Diameter, 380m Long And Inclined 66 Degrees.
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592830
5373694
Raise To Surface
Active
Raise #2
2010 Inspection; Raise #2 Is A Fresh Air Ventilation Borehole Located 1om West Of Raise #1. Raise Is 1.8m In Diameter And Is 300m Long. The Raise Is Inclined At 76 Degrees For 100m Then 73 Degrees For 153m.
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592808
5373650
Raise To Surface
Active
Raise #3
2010 Inspection; Raise #3 Is The Main Exhaust Ventilation Borehole. It Is 2.4m In Diameter, 149m Long And Is Inclined 74 Degrees.
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594036
5373639
Raise To Surface
Active
Raise #4
2010 Inspection; Raise #4 Is A Secondary Exhaust Ventilation Borehole. It Is 1.8m In Diameter, 267m Long And Is Inclined At 66 Degrees.
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594093
5373667
Raise To Surface
Active
Raise #5
2010 Inspection; Raise #5 Is Backfilled Borehole Locaetd At The South Zone Backfill Plant. The Raise Is 1.5m In Diameter, 569m Long And Is Inclined 75 Degrees.
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593096
5373107
Shaft - 2 Compartment - Incline Shaft
Active
Old Shaft
2019 Ir: Date Of Backfill Unknown. Shaft Area Is Now Overgrown With Forest. No Underground Workings Connected To This Shaft. Located 250m Siuthwest Of The Mill Building. No Signs Of Settlement.
2010 Inspection; The Old Shaft Was Used For E
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592792
5373651
Shaft - 3 Compartment - Vertical Shaft
Active
Shaft #3 (production Shaft)
2019 Ir: Located Within The Head Frame.
2010 Inspection; Has Three Compartments From Surface To The 300m Level Then Becomes A Four Compartment Structure. Shaft Is Lined With Concrete.
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593047
5373765
Tailings - Confined
Active
North Basin
2010 Inspection; The Tailings Are Comprised Of 55% Holt-mcdermott Ore And 45% Holloway Mine Ore. Holt-mcdermott Ore Is Not Potentially Acid Generating And Also Contains Low Levels Of Associated Heavy Metals And Arsenic. Holloway Ore Is Potent
17
594159
5370129
Tailings - Confined
Active
Southwest Basin - Dams 6 & 10
2019 Ir: The Road Had Been Moved And Tailings Had Already Been Deposited In The Proposed Area
2010 Inspection; Southwest Basin Initially Served As The Polishing Pond. The Tailings Management Area Was Expanded To Include Th
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594041
5370033
Tailings - Confined
Active
West Settling Pond
2010 Inspection; The West Pond Collects Surface Run-off. The West Pond Provides Surplus Water For The Mill. One Culvert Directs Surface Run-off To The Pond.
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592855
5373901
Tailings Dams
Active
Dam 5 (internal Dam)
2019 Ir: 2017 Dsi Reccomends Trees Growing On The North Causeway Near The West Abutment Should Be Removed Before They Get Too Big.
2016 Dam Safety Inspection
Comprised Of The North And South Causeway, Separates North And South
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594030
5370894
Tailings Dams
Active
Dam 11a - Active
2019 Ir: Marks The Southern Extent Of The Tma. 2017 Dsi Recommends Htat Brush Removal Be Undertaken And The Report Pointed Out The Poplars Adjacent To The Downstream Toe
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594021
5368750
Tailings Dams
Active
Southwest Basin - Dam 13 (southeastern Extent Of The Basin)
2016 Dam Safety Inspection; Small Depth Of Water From Runoff Ponds Against The Downstream Toe, Water Level Has Never Reached Upstream Toe
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594893
5369982
Tailings Dams
Active
Southeast Basin - Dam 10 (internal Dam)
2019 Ir: Forms The Boundary Between The Southwest Basin With The Southeast Basin.
2016 Dam Safety Inspection; Access Road Crosses Downstream Tailings Beach, Grade Of Road May Cause Discharge From The North Basin
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594148
5370452
Tailings Dams
Active
Southeast Basin - Dam 6 (borders The Polishing Pond)
2016 Dam Safety Inspection; Placement Of Rip Rap Has Reduced Effects Of Wave Erosion At The Downstream Toe, Erosion No Longer Expected To Occur
17
594101
5369857
Tailings Dams
Active
North Basin - Dam 8 South
2019 Ir: 2017 Dsi Recommends That The Tailings Should Be Discharged From A Point South Of Dam 8 In Order To Eliminate The Water That Currently Ponds Against Dam 8 South And Dam 8 North And Thus To Create A Free Draining Beach Ar
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594402
5372199
Tailings Dams
Active
North Basin - Dam 8 North
2018 Ir: Constructed In 1966 To Complete The Containment Of The North Tailings Basin.
2010 Inspection; Most Of The Tailings Were Deposited In The North Tailings Basin.
2016 Dam Safety Inspection; Little To Note, No Seepage. C
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594319
5372414
Tailings Dams
Active
Dam 15a - Active
Rockfill Geomembrane. Average Downstream Slope 2.5
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593196
5371515
Tailings Dams
Active
North Basin - Dam 7
2019 Ir: Construted In 1966 To Complete The Containment Of The North Tailings Basin.
2010 Inspection; Most Of The Tailings Were Deposited In The North Tailings Basin.
2016 Dam Safety Inspection; Mine Muck Fill Placed Over Crest, Pr
17
594166
5372515
Tailings Dams
Active
Dam 15b- Active
Rockfill With Geomembrane. Average Downstream Slope 2.5
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592958
5371383
Tailings Dams
Active
North Basin - Dam 4 And 4a (west Side Of North Tailings Basin)
Dam 4: 12m High, 140m Long
Dam 4a: 10m High, 480m Long
2010 Inspection; Most Of The Tailings Were Deposited In The North Tailings Basin.
2016 Dam Safety Inspection; Some Indication Of See
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593512
5371775
Tailings Dams
Active
North Basin - Dam 3 And 3a
Dam 3: 13m High, 180m Long
Dam 3a:12m High, 100m Long
2019 Ir:2017 Dsi Recommends Brush Removal Be Undertaken On The Downstream Toe.
2010 Inspection; Most Of The Tailings Were Deposited In The North Tailings Basin.
2016 Da
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593593
5372042
Tailings Dams
Active
North Basin - Dam 2 And 2a (west Side Of North Tailings Basin)
Dam 2: 23m High, 165m Long
Dam 2a: 7m High, 90m Long
2019 Ir: 2017 Dsi States No Cracking But Recommends Inspecting The Dam Each Spring For Any Recurrence Of The Cracking.
2010 Inspection
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593709
5372315
Tailings Dams
Active
North Basin - Dam 1
2019 Ir: 2017 Dsi Recommends That Brush Removal Be Undertaken On The Downstream Toe Of Dam 1.
2010 Inspection; Most Of The Tailings Were Deposited In The North Tailings Basin.
2016 Dam Safety Inspection; Seepage Suggested By Sta
17
593931
5372394
Tailings Dams
Active
Dam 11b - Active
2019 Ir: Marks The Southern Extent Of The Tma.
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594521
5368894
Tailings Dams
Active
Dam 12 - Active
2019 Ir: Marks The Southern Extent Of The Tma. 2017 Dis Recommends That Brush Removal Be Undertaken And The Report Pointed Out The Trees At The Abutment On The Upstream Face.
17
594979
5369108
Tailings Dams
Active
Dam 14 - Active
Rockfill With Geomembrane. Avergae Downstream Slope 2.5
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594342
5371846
Waste Rock Dump
Active
Mine Waste Rock
2010 Inspection; Waste Rock From Underground Is Being Stored On Surface For Subsequent Use As Backfill. All Waste Rock Stockpiled Will Either Be Used As Underground Backfill Or As Construction Material In The Tailings Basin. Waste Rock Wa
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593832
5373672
Waste Rock Dump
Active
Mattawasaga No.1 Pit Waste Rock
2019 Ir: The Grass Cover Appeared Healthy And Sustainable. It Is Not Clear Of The Waste Rock Stockpiled On Site Has The Potential To Be Acid Generating And Or Metal Leaching.
2010 Inspection; Waste Rock Was Stockpiled To
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593832
5373672