Feasibility Study and Technical Report - Pretivm

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The mine will be dewatered using a dirty water system of sumps and pumps.Submersible and centrifugal pumps will be used for development and permanent mineoperations. For underground worker safety, both permanent and portable refuge stationsare planned. The emergency warning system will include phones, cap lamp warningsystem, and stench gas.The total project mining capital, including a 10% contingency, is estimated at$210 million. Sustaining mining capital of $265 million has been estimated for theproduction period. The total underground operating cost over the LOM is estimated to be$1,769 million, at an average LOM cost of $94.40/t.1.8 PROJECT INFRASTRUCTUREThe Project will require the development of a number of infrastructure items. Thelocations of project facilities and other infrastructure items were selected to takeadvantage of local topography, accommodate environmental considerations, and ensureefficient and convenient operation of the mine haul fleet. Figure 1.2 illustrates theoverall site layout for the Project. Figure 1.3 illustrates the mill site layout and Figure 1.4illustrates the Knipple Transfer Station facility layout.Project infrastructure will include:• a 79 km access road at Highway 37 and travelling westward to Brucejack Lakewith the last 12 km of access road to the mine site traversing the main arm ofthe Knipple Glacier• internal site roads and pad areas• grading and drainage• avalanche hazard assessment• transmission line• ancillary facilities• water supply and distribution• water treatment plant• waste disposal• tailings delivery system• Brucejack outlet control• communications• power supply and distribution• fuel supply and distribution• off-site infrastructure including the Bowser Airstrip and Camp and the KnippleTransfer Station facilities.Pretium Resources Inc. 1-11 1291990200-REP-R0012-02.1Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC
Figure 1.2Overall Site LayoutE 430000 E 440000 E 450000 E 460000 E 470000N37Securit yGatehouseN 6262500Mill Site and PortalKnipple GlacierTracked VehicleAccess RouteNew Access RoadBowserLake37N 6252500Valley ofKing BypassHigh VoltageTransmission LineExist ingAccess RoadBowserAirstripBowserRiverKnippleTransferStation and CampN 6242500Metres0 3000 6000 9000Pretium Resources Inc. 1-12 1291990200-REP-R0012-02Feasibility Study and Technical Report on the Brucejack Project, Stewart, BC
Page 1 and 2: Report to:Pretium Resources Inc.Fea
Page 3 and 4: TABLE OF CONTENTS1.0 SUMMARY ......
Page 5 and 6: 12.2 DATA VERIFICATION BY SNOWDEN .
Page 7 and 8: 16.7 MOBILE EQUIPMENT REQUIREMENTS
Page 9 and 10: 20.1 SUSTAINABILITY AND ENVIRONMENT
Page 11 and 12: 26.4.2 HYDROGEOLOGICAL RECOMMENDATI
Page 13 and 14: Table 13.23 Occurrences of Gold in
Page 15 and 16: LIST OF FIGURESFigure 1.1 Simplifie
Page 17 and 18: Figure 16.11 Extent of Mine Develop
Page 19 and 20: hertz .............................
Page 21 and 22: atomic emission spectroscopy ......
Page 23 and 24: Mineable Shape Optimizer ..........
Page 25 and 26: VOK Domain 2 ......................
Page 27 and 28: 1.2 PROPERTY DESCRIPTION AND LOCATI
Page 29 and 30: 1.4 MINERAL RESOURCE ESTIMATESSnowd
Page 31 and 32: Table 1.2West Zone Mineral Resource
Page 33 and 34: Figure 1.1Simplified Process Flowsh
Page 35: 1.7 MINING METHODSThe underground m
Page 39 and 40: Figure 1.4Knipple Transfer Station
Page 41 and 42: outflow. This approachdischarge thr
Page 43 and 44: summary of the overall operating co
Page 45 and 46: The Project schedule identifies the
Page 47 and 48: 2.1 QUALIFIED PERSONSThe qualified
Page 49 and 50: Report Section Company QP23.0 Adjac
Page 51 and 52: 4.0 PROPERTY DESCRIPTION AND LOCATI
Page 53 and 54: 4.3 STATUS OF MINING TITLESThe Prop
Page 55 and 56: Figure 4.3Pretivm Mineral ClaimsSou
Page 57 and 58: 5.0 ACCESSIBILITY, CLIMATE, LOCALRE
Page 59 and 60: 5.2 CLIMATE AND PHYSIOGRAPHYThe cli
Page 61 and 62: 6.0 HISTORYInformation in this sect
Page 63 and 64: Figure 6.1West Zone Underground Vei
Page 65 and 66: 6.1 WORK COMPLETED BY SILVER STANDA
Page 67 and 68: 7.0 GEOLOGICAL SETTING ANDMINERALIZ
Page 69 and 70: Figure 7.1Tectonic Setting of the B
Page 71 and 72: 7.2 LOCAL GEOLOGY - SULPHURETS MINI
Page 73 and 74: Altered Stuhini Group rocks and Mit
Page 75 and 76: Figure 7.4Sulphurets Mining Camp Ge
Page 77 and 78: y the Brucejack Fault as well as by
Page 79 and 80: Previously, some of the rocks strad
Page 81 and 82: Figure 7.6Brucejack Property Geolog
Page 83 and 84: Figure 7.6 (con’t)Brucejack Prope
Page 85 and 86: more distal (i.e. down temperature)
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more heavily altered than those abo
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Figure 7.8Brucejack Property Minera
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Figure 7.10South-north Cross-sectio
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WEST ZONEThe West Zone gold-silver
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Figure 7.12VOK to West Zone Geologi
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Figure 7.14West Zone Drillholes and
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steep, is generally associated with
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Figure 7.15Trace Element Analysis b
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for which an age of c.110 Ma has be
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Figure 8.1Brucejack Deposit Mineral
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Figure 9.13D Geophysical Model Sche
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10.0 DRILLINGInformation in this se
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Figure 10.1Core in Wooden Core Boxe
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Figure 10.3Brucejack Property Diamo
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The cut PQ samples weighed approxim
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submitted to ALS. In addition, a re
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Primary sample gold concentrations
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12.0 DATA VERIFICATIONIndependent s
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12.2 DATA VERIFICATION BY SNOWDENSn
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Figure 12.4Sample Verification Resu
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Year Program ID Laboratory ** Gravi
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13.3.2 2012 TO 2013 TEST SAMPLESIns
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Table 13.7 Conceptual Master Compos
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ALSInspectorateFire Assay (g/t) Met
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13.3.6 ORE HARDNESS TEST WORKTable
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Table 13.14 Sample Specific Gravity
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In general, there was a reduction i
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Figure 13.5 Effect of Primary Grind
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In 2012 and 2013, most of the flota
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Further cleaner tests were conducte
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Figure 13.14 Effect of Cleaner Flot
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SampleIDWZ-2CompositeCompositeBJ-AC
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The 2012 and 2013 tests routinely i
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Figure 13.17Cumulative Stage GRG ve
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Figure 13.21 Silver Cyanide Extract
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Table 13.24 Head Sample Cyanidation
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Based on the findings of the prelim
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Primary Grind/Regrind SizesConcentr
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Further cyanide leach tests were ca
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including samples with low head gra
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Grade (g/t) Recovery/Extraction (%)
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Figure 13.28 Variability Test Resul
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Table 13.31Locked Cycle Tests Resul
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Table 13.33Conventional Thickening
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13.3.11 CONCLUSIONSA review of prel
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Table 13.37Head Grade(g/t)Metallurg
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• geological interpretation and m
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to form a series of seemingly strat
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14.6 COMPOSITING OF ASSAY INTERVALS
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In the high-grade domains (includin
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Table 14.3Parameters to Describe Go
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14.8.3 HIGH-GRADE DOMAINS - PROBABI
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analysis. Any target blocks that re
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For VOK and West Zone the interpola
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Table 14.9Comparison of the Mean Co
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the economic viability of the depos
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14.15 RESOURCE REPORTINGThe mineral
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15.0 MINERAL RESERVE ESTIMATES15.1
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Table 15.1Net Smelter Return Parame
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15.4 MINING SHAPESAMC used the Mine
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Strike length varies considerably w
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15.7 MINERAL RESERVESMineral reserv
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Figure 15.4Reserve Shapes and Minin
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16.2 MINE DESIGN16.2.1 ACCESS AND R
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Figure 16.2Brucejack Twin Declines
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Figure 16.4Typical Level Plan - 1,2
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Table 16.1Development Design Parame
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Figure 16.7Mineable Stope Shapes -
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Once the stope footprint is slashed
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16.3.3 STOPE SEQUENCEThe mining seq
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Stopes that will not be re-exposed
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Table 16.5LOM Backfilling - Waste R
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Figure 16.11Extent of Mine Developm
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• development of the 1,210 and 1,
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Figure 16.13Life of Mine Production
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Table 16.7LOM Tonnes and GradesYear
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Table 16.8Rock Mass PropertiesUnitU
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AMC estimated ore recovery in the w
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FULL-WIDTH UNDERCUTSThe Project min
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Table 16.10Mine Infrastructure Exca
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with lesser components supplied by
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un was completed representing glaci
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Table 16.12Underground Development
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TRANSMIXERSShotcrete will be delive
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The VOK Zone and West Zone mining a
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Figure 16.17 shows a ventilation co
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• regular inspection of the conve
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On low-head applications, a submers
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Figure 16.18Dewatering PlanPretium
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Figure 16.20CrusherThe 42 in wide b
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16.9.3 POWER REQUIREMENTS AND ELECT
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Electrical power will be supplied t
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To supply service water to the high
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16.9.7 WORKSHOP AND STORESThe maint
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Radio communications will be establ
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16.9.11 PORTAL STRUCTUREA portal st
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propane consumption. Table 16.18 sh
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16.10 PASTE FILL DISTRIBUTIONP&C co
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Figure 16.33Paste Fill Distribution
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Figure 16.35Pre-production Paste Fi
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RoleHeadCountMaintenance (72)Mainte
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17.0 RECOVERY METHODS17.1 MINERAL P
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The process plant will consist of t
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17.1.4 PLANT DESIGNMAJOR DESIGN CRI
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• a belt conveyor, 914 mm wide by
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CONCENTRATE REGRINDINGThe flotation
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The dried tabling concentrate will
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solution strength. The solution wil
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PROCESS CONTROL AND INSTRUMENTATION
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• vendors’ instrumentation pack
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18.0 PROJECT INFRASTRUCTURE18.1 OVE
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Figure 18.1Brucejack Overall Site L
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18.2 GEOTECHNICAL18.2.1 OVERVIEWThe
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18.3 ACCESS18.3.1 ACCESS ROADSThe B
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Figure 18.3Knipple Glacier Access R
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available in the winter and also pr
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18.5 GRADING AND DRAINAGEThe site w
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AVALANCHE FREQUENCYAvalanche freque
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• portal fuel storage• conveyor
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Operations CampSize 2 avalanches fr
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Figure 18.5Access Road Avalanche Ha
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and dated June 2013. As requested b
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Figure 18.7Photo of Typical Slopes
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• the design of special towers to
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modular construction where possible
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collect waste water during maintena
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water treatment plant to increase t
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Air/vacuum valves will be installed
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Figure 18.10Foot Print of 3% Deposi
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A pre-manufactured trailer will be
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• fuel storage• vendors’ inst
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18.17 OFF-SITE INFRASTRUCTURE18.17.
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18.17.3 BOWSER AIRSTRIPRegular char
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INSTRUMENT APPROACH PROCEDURESAn IA
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AERODROME PERSONNEL AND MAINTENANCE
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TRANSPORT MODE OPTIONSTruckThere ar
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SBT has the ability to mobilize cra
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Pretivm is committed to a process t
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engage with the Nisga’a Lisims Go
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Average monthly temperature data us
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The fisheries resources and fish ha
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was conducted on the NPR values of
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all modelling exercises, the accura
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16 corridor is recovering from the
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• reporting and feedback mechanis
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Approximately 47% of the tailings w
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20.1.8 WASTE MANAGEMENTMine WastesP
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from the site. Fixed equipment, suc
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• Forest Act (BC)• Forest and R
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Table 20.5List of Federal Approvals
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21.1.2 ESTIMATE BASE DATE AND VALID
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…costs not directly attributable
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• small tools• consumables• c
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The total cost for Major Area 33 -
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The unit cost estimates are based o
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MINE OPERATING COSTSThe total under
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Table 21.7Summary of Process Operat
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Table 21.8Summary of Backfilling Op
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DescriptionLabourForceTotal Cost($/
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22.0 ECONOMIC ANALYSIS22.1 INTRODUC
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Figure 22.1Pre-tax Cash FlowCumulat
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transport the concentrate to a buil
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Figure 22.4Pre-tax Payback Period S
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Canadian development expense and 60
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23.0 ADJACENT PROPERTIESSnowden not
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23.2 HIGH PROPERTYThe Teuton Resour
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managers, and the mining manager, a
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MANAGEMENT PROCEDURESThe EPCM contr
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Figure 24.2Level 1 Execution Schedu
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Capital equipment purchases will be
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Construction work will be split int
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provided with dedicated emergency p
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econciliation to the freight consol
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PROJECT TEAM RESPONSIBILITIESIt is
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WBS Area PretivmEPCMTeamUnderground
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24.1.15 RISK MANAGEMENTA Risk Asses
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There may be opportunities to optim
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The conceptual layout is preliminar
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25.4.8 TAILINGS DELIVERY SYSTEMThe
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26.0 RECOMENDATIONS26.1 GEOLOGYThe
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• Further test work to identify t
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The estimated cost for the above-me
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• Careful planning as well as det
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26.5.6 BRUCEJACK OUTLET CONTROL STR
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• Further groundwater quality and
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27.0 REFERENCES27.1 AVALANCHE HAZAR
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Price, W. (2005). Mend Report 9.1c:
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Britton, J. M. and Alldrick, D. J.,
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Olssen. L., Jones, I.. 2012b. Preti
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28.0 CERTIFICATES OF QUALIFIED PERS
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28.2 IVOR W.O. JONES, M.SC., CP, FA
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28.3 JOHN HUANG, PH.D., P.ENG.I, Ji
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28.5 HAMISH WEATHERLY, M.SC., P.GEO
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28.7 SABRY ABDEL HAFEZ, PH.D., P.EN
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28.9 CATHERINE SCHMID, M.SC., P.ENG
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28.11 BRENT MCAFEE, P.ENG.I, Brent
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28.13 MICHAEL CHIN, P.ENG.I, Michae
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28.15 MICHAEL PAUL WISE, P.ENG., MB
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28.17 CLAYTON RICHARDS, P.ENG.I, Cl
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28.19 ALI FARAH, P.ENG.I, Ali Farah
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28.21 S. (KUMAR) SRISKANDAKUMAR, M.
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