Feasibility Study and Technical Report - Pretivm

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Table 21.6Annual Mine Operating CostsYearDevelopment($ million)Stoping($ million)Maintenance($ million)SupervisoryandTechnicalServices($ million)DiamondDrilling($ million)MineGeneral($ million)Ore(t)$/t-2 - - - - - - 5,124 --1 - - - - - - 240,599 -1 14.2 26.5 9.8 5.7 1.7 8.2 565,653 116.82 20.0 38.9 14.2 7.7 2.8 10.8 937,169 100.73 18.8 40.3 14.3 7.7 2.9 11.0 979,037 97.24 21.8 37.4 14.3 7.7 2.9 11.1 980,631 97.25 22.8 37.4 14.3 7.7 2.9 11.1 982,603 97.96 22.9 37.1 14.3 7.7 2.9 11.2 985,759 97.67 18.7 41.5 14.3 7.7 2.9 10.9 985,324 97.58 17.4 38.9 14.3 7.7 2.9 10.8 984,974 93.69 15.1 42.2 14.3 7.7 2.9 11.1 980,427 95.210 16.4 41.1 14.3 7.7 3.0 11.1 990,705 94.411 14.4 38.2 14.3 7.7 2.9 11.2 978,466 90.812 16.8 38.3 14.3 7.7 2.9 11.2 978,883 93.213 17.0 39.5 14.3 7.7 2.9 11.3 981,517 94.414 11.8 40.4 14.3 7.7 3.0 11.4 987,498 89.615 9.3 38.5 14.3 7.7 3.0 11.0 986,651 84.916 7.5 39.4 14.3 7.7 2.9 11.0 979,339 84.617 8.7 39.1 14.3 7.7 2.9 10.3 981,683 84.618 6.8 38.2 14.2 7.7 2.8 10.1 949,013 84.219 5.5 21.5 8.4 5.0 1.5 6.6 501,236 96.720 6.0 21.4 8.4 4.9 1.5 6.5 495,290 98.421 3.5 21.3 8.2 4.9 1.2 5.5 404,038 110.322 1.3 8.2 3.4 1.9 0.4 2.8 144,317 125.3Total 296.9 765.2 281.2 153.5 56.0 216.2 18,740,213 94.421.2.3 PROCESS OPERATING COSTSThe estimated operating cost for process operations is shown in Table 21.7, includinggrinding, gravity concentration, bulk flotation, concentrate dewatering, flotation tailingsdelivery, and doré production. The LOM average process operating cost is estimated tobe $18.16/t milled or $16.3 million per year excluding the operating cost for crushing,which has been covered in the mining operating cost. The estimate is based on a totalmill feed of 18,985,936 t and a mine life of 22 years, or an average annual process rateof 897,000 t.Pretium Resources Inc. 21-13 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC
Table 21.7Summary of Process Operating CostDescriptionLabourForceAnnual Cost($)Unit Cost($/t Milled)Labour ForceOperating Staff 18 2,057,000 2.29Operating Labour 38 3,163,000 3.53Maintenance Labour 39 3,487,000 3.89Subtotal Labour Force 95 8,707,000 9.71Major ConsumablesMetal Consumables - 2,750,000 3.06Reagent Consumables - 842,000 0.94Subtotal Major Consumables - 3,592,000 4.00SuppliesMaintenance Supplies - 1,669,000 1.86Operating Supplies - 589,000 0.66Power Supply - 1,732,000 1.93Subtotal Supplies - 3,990,000 4.45Total (Process) - 16,289,000 18.16All process operating costs are exclusive of taxes, permitting costs, or other governmentimposed costs unless otherwise noted. The following items have been included in theestimate:• labour force requirements, including supervision, operation, and maintenance,salary/wage levels based on current labour rates in comparable operations inBC. The annual salary includes holiday and vacation pay. A benefit burden of30% for the labour includes Registered Retirement Savings Plans (RRSPs),various life and accident insurances, extended medical benefits, BC MedicalService Plan (MSP), Canadian Pension Plan (CPP), Employment Insurance (EI),Workers' Compensation Board (WCB) insurance, tool allowance, and otherbenefits.• mill liner and mill grinding media consumptions, estimated from the Bondgrinding media/liner consumption estimate equations and the Tetra Techdatabase; the steel ball and mill liner prices based on the quotations from thepotential suppliers.• maintenance supply costs, based on approximately 7% of major equipmentcapital costs.• laboratory supplies, building maintenance and other costs, based on TetraTech’s in-house database and industry experience.• reagent costs, based on the consumption rates from test results and quotedbudget prices or the Tetra Tech database.• service vehicle costs, including fuel consumables and maintenances, areincluded in the surface service cost estimates.Pretium Resources Inc. 21-14 1291990200-REP-R0012-02Feasibility 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 .
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16.7 MOBILE EQUIPMENT REQUIREMENTS
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20.1 SUSTAINABILITY AND ENVIRONMENT
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26.4.2 HYDROGEOLOGICAL RECOMMENDATI
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Table 13.23 Occurrences of Gold in
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LIST OF FIGURESFigure 1.1 Simplifie
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Figure 16.11 Extent of Mine Develop
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hertz .............................
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atomic emission spectroscopy ......
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Mineable Shape Optimizer ..........
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VOK Domain 2 ......................
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1.2 PROPERTY DESCRIPTION AND LOCATI
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1.4 MINERAL RESOURCE ESTIMATESSnowd
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Table 1.2West Zone Mineral Resource
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Figure 1.1Simplified Process Flowsh
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1.7 MINING METHODSThe underground m
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Figure 1.2Overall Site LayoutE 4300
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Figure 1.4Knipple Transfer Station
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outflow. This approachdischarge thr
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summary of the overall operating co
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The Project schedule identifies the
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2.1 QUALIFIED PERSONSThe qualified
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Report Section Company QP23.0 Adjac
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4.0 PROPERTY DESCRIPTION AND LOCATI
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4.3 STATUS OF MINING TITLESThe Prop
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Figure 4.3Pretivm Mineral ClaimsSou
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5.0 ACCESSIBILITY, CLIMATE, LOCALRE
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5.2 CLIMATE AND PHYSIOGRAPHYThe cli
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6.0 HISTORYInformation in this sect
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Figure 6.1West Zone Underground Vei
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6.1 WORK COMPLETED BY SILVER STANDA
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7.0 GEOLOGICAL SETTING ANDMINERALIZ
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Figure 7.1Tectonic Setting of the B
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7.2 LOCAL GEOLOGY - SULPHURETS MINI
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Altered Stuhini Group rocks and Mit
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Figure 7.4Sulphurets Mining Camp Ge
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y the Brucejack Fault as well as by
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Previously, some of the rocks strad
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Figure 7.6Brucejack Property Geolog
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Figure 7.6 (con’t)Brucejack Prope
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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
Page 351 and 352: • fuel storage• vendors’ inst
Page 353 and 354: 18.17 OFF-SITE INFRASTRUCTURE18.17.
Page 355 and 356: 18.17.3 BOWSER AIRSTRIPRegular char
Page 357 and 358: INSTRUMENT APPROACH PROCEDURESAn IA
Page 359 and 360: AERODROME PERSONNEL AND MAINTENANCE
Page 361 and 362: TRANSPORT MODE OPTIONSTruckThere ar
Page 363 and 364: SBT has the ability to mobilize cra
Page 365 and 366: Pretivm is committed to a process t
Page 367 and 368: engage with the Nisga’a Lisims Go
Page 369 and 370: Average monthly temperature data us
Page 371 and 372: The fisheries resources and fish ha
Page 373 and 374: was conducted on the NPR values of
Page 375 and 376: all modelling exercises, the accura
Page 377 and 378: 16 corridor is recovering from the
Page 379 and 380: • reporting and feedback mechanis
Page 381 and 382: Approximately 47% of the tailings w
Page 383 and 384: 20.1.8 WASTE MANAGEMENTMine WastesP
Page 385 and 386: from the site. Fixed equipment, suc
Page 387 and 388: • Forest Act (BC)• Forest and R
Page 389 and 390: Table 20.5List of Federal Approvals
Page 391 and 392: 21.1.2 ESTIMATE BASE DATE AND VALID
Page 393 and 394: …costs not directly attributable
Page 395 and 396: • small tools• consumables• c
Page 397 and 398: The total cost for Major Area 33 -
Page 399 and 400: The unit cost estimates are based o
Page 401: MINE OPERATING COSTSThe total under
Page 405 and 406: Table 21.8Summary of Backfilling Op
Page 407 and 408: DescriptionLabourForceTotal Cost($/
Page 409 and 410: 22.0 ECONOMIC ANALYSIS22.1 INTRODUC
Page 411 and 412: Figure 22.1Pre-tax Cash FlowCumulat
Page 413 and 414: transport the concentrate to a buil
Page 415 and 416: Figure 22.4Pre-tax Payback Period S
Page 417 and 418: Canadian development expense and 60
Page 419 and 420: 23.0 ADJACENT PROPERTIESSnowden not
Page 421 and 422: 23.2 HIGH PROPERTYThe Teuton Resour
Page 423 and 424: managers, and the mining manager, a
Page 425 and 426: MANAGEMENT PROCEDURESThe EPCM contr
Page 427 and 428: Figure 24.2Level 1 Execution Schedu
Page 429 and 430: Capital equipment purchases will be
Page 431 and 432: Construction work will be split int
Page 433 and 434: provided with dedicated emergency p
Page 435 and 436: econciliation to the freight consol
Page 437 and 438: PROJECT TEAM RESPONSIBILITIESIt is
Page 439 and 440: WBS Area PretivmEPCMTeamUnderground
Page 441 and 442: 24.1.15 RISK MANAGEMENTA Risk Asses
Page 443 and 444: There may be opportunities to optim
Page 445 and 446: The conceptual layout is preliminar
Page 447 and 448: 25.4.8 TAILINGS DELIVERY SYSTEMThe
Page 449 and 450: 26.0 RECOMENDATIONS26.1 GEOLOGYThe
Page 451 and 452: • 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:
Page 465 and 466:
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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