Feasibility Study and Technical Report - Pretivm

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Report Section Company QP13.0 Mineral Processing and MetallurgicalTestingTetra TechJohn Huang, Ph.D., P.Eng.14.0 Mineral Resource Estimate Snowden Ivor W.O. Jones, M.Sc., CP, FAusIMM15.0 Mineral Reserve Estimate AMC Colm Keogh, P.Eng.16.0 Mining Methods AMC/BGCP&CColm Keogh, P.Eng./Mo Molavi, P.Eng./Catherine Schmid, M.Sc., P.Eng./Virginia Cullen, M.Eng., P.Eng./Maureen McGuiness, P.Eng.17.0 Recovery Methods Tetra Tech John Huang, Ph.D., P.Eng.18.0 Project Infrastructure - -18.1 Overview Tetra Tech Dave Ireland, C.Eng., P.Eng.18.2 Site Geotechnical BGC Brent McAfee, P.Eng.18.3 Access Tetra Tech Dave Ireland, P.Eng.18.4 Internal Site Roads and Pad Areas Tetra Tech Mike Chin, P.Eng.18.5 Grading and Drainage Tetra Tech Mike Chin, P.Eng.18.6 Avalanche Hazard Assessment AlpineSolutionsBrian Gould, P.Eng.18.7 Transmission Line Valard Michael Wise, P.Eng.18.8 Ancillary Facilities Tetra Tech Dave Ireland, C.Eng., P.Eng.18.9 Water Supply and Distribution Tetra Tech Dave Ireland, C.Eng., P.Eng.18.10 Water Treatment Plant Tetra Tech Dave Ireland, C.Eng., P.Eng.18.11 Waste Rock Disposal BGC Brent McAfee, P.Eng.18.12 Tailings Delivery System Rescan Paul Greisman, Ph.D., P.Eng.18.13 Brucejack Lake Suspended SolidsOutflow ControlTetra TechDave Ireland, C.Eng., P.Eng.18.14 Communications Tetra Tech Clayton Richards, P.Eng.18.15 Power Supply and Distribution Tetra Tech Wayne E. Scott, P.Eng.18.16 Fuel Supply and Distsribution Tetra Tech Ali Farah, P.Eng.18.17 Off-site Infrastructure Tetra Tech Dave Ireland, C.Eng., P.Eng.19.0 Market Studies and Contracts Tetra Tech John Huang, Ph.D., P.Eng.20.0 Environmental Studies, Permitting,and Social or Community ImpactRescan/BGCPierre Pelletier, P.Eng./Hamish Weatherly, M.Sc., P.Geo./Virginia Cullen, M.Eng., P.Eng.21.0 Capital and Operating Costs - -21.1 Capital Cost Estimate Tetra Tech Harvey Wayne Stoyko, P.Eng.21.2 Operating Cost Estimate - -21.2.1 Summary Tetra Tech John Huang, Ph.D., P.Eng.21.2.2 Mining Operating Costs AMC Colm Keogh, P.Eng.21.2.3 Process Operating Costs Tetra Tech John Huang, Ph.D., P.Eng.21.2.4 Backfilling Operating Costs Tetra Tech John Huang, Ph.D., P.Eng.21.2.5 Water Treatment Operating Costs John Huang, Ph.D., P.Eng.21.2.6 General and Administrative andSuface ServicesJohn Huang, Ph.D., P.Eng.22.0 Economic Analysis Tetra Tech Sabry Abdel Hafez, Ph.D., P.Eng.table continues…Pretium Resources Inc. 2-3 1291990200-REP-R0012-02.1Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC
Report Section Company QP23.0 Adjacent Properties Snowden Ivor W.O. Jones, M.Sc., CP, FAusIMM24.0 Other Relevant Data Tetra Tech Dave Ireland, C.Eng., P.Eng.25.0 Interpretations and Conclusions All Sign-off by Section26.0 Recommendations All Sign-off by Section27.0 References All Sign-off by Section28.0 Certificates of Qualified Persons All Sign-off by Section2.2 INFORMATON AND DATA SOURCESA complete list of references is provided in Section 27.0.2.2.1 SNOWDENPretivm has provided to Snowden the data used as the basis of this report fromgeological mapping, sampling and various drilling campaigns.This report is based, in part, on internal company technical reports, and maps, publishedgovernment reports, company letters and memoranda, and public information as listed inSection 27.0. Several sections from reports authored by other consultants have beendirectly quoted in this report, and are so indicated in the appropriate sections. Snowdenhas not conducted detailed land status evaluations, and has relied upon previousqualified reports, public documents and statements by Pretivm regarding property statusand legal title to the Property.Pretium Resources Inc. 2-4 1291990200-REP-R0012-02.1Feasibility Study and Technical Report on the BrucejackProject, 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 and 36: 1.7 MINING METHODSThe underground m
Page 37 and 38: Figure 1.2Overall Site LayoutE 4300
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: 2.1 QUALIFIED PERSONSThe qualified
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)
Page 87 and 88: more heavily altered than those abo
Page 89 and 90: Figure 7.8Brucejack Property Minera
Page 91 and 92: Figure 7.10South-north Cross-sectio
Page 93 and 94: WEST ZONEThe West Zone gold-silver
Page 95 and 96: Figure 7.12VOK to West Zone Geologi
Page 97 and 98: 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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