Feasibility Study and Technical Report - Pretivm

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Table 16.10Mine Infrastructure Excavations – Ground Support RecommendationsAreaDimension(height x width (alongtrend) by length)(m)Trend/Plunge ofExcavationDesignFactorof Safety Lifespan SupportCap Magazine 3.05 by 6.1 by 3.05 152/21 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).Crusher Chamber -Lower level(conveyor)Crusher Chamber -Upper level (truck)Electricians andMillwrights ShopFuel and LubeStationService Bay,Maintenance Bay,and Tire Bay18.1 by 14.2 by 9.4 057/01 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS.Cable bolts:Walls: 5.0 m length, bulbed strand, 2.5 m square spacingBack: 5.0 m length, bulbed strand, 2.5 m square spacing17.3 by 7.6 by 9.3 057/01 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.5 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS.Cable bolts:Walls: 5.0 m length, bulbed strand, 2.5 m square spacingBack: 5.0 m length, bulbed strand, 2.5 m square spacing5.5 by 16.2 by 5.5 270/01 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).4.5 by 35 by 8.5 243/06 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).Cable bolts:Back: 5.0 m length, bulbed strand, 2.5 m square spacing11.5 by 42 by 10.0 005/00 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).Cable bolts:Walls: 5.0 m length, bulbed strand, 2.5 m square spacingBack: 5.0 m length, bulbed strand, 2.5 m square spacingtable continues…Pretium Resources Inc. 16-34 1291990200-REP-R0012-02Feasibility Study and Technical Report on the Brucejack Project, Stewart, BC
AreaDimension(height x width (alongtrend) by length)(m)Trend/Plunge ofExcavationDesignFactorof Safety Lifespan SupportPowder Magazine 7.1 by 14.1 by 6.4 152/01 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).Cable bolts:Walls: 5.0 m length, bulbed strand, 2.5 m square spacingBack: 5.0 m length, bulbed strand, 2.5 m square spacingRefuge Stationand Offices4.6 by 15 by 5.2 062/01 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).Warehouse 5.5 by 27 by 5.5 270/01 2 LOM Galvanized, resin-grouted rebar (or equivalent); 1.8 m length; 1.75 m square spacing.Welded wire mesh, 100% coverage on back and walls, coated with minimum 2" SFRS(shotcrete only required if rehab will not be practical due to installed infrastructure).Notes:LOM = life of mine assumed 20 to 25 years; SFRS = steel fibre reinforced shotcretePretium Resources Inc. 16-35 1291990200-REP-R0012-02Feasibility Study and Technical Report on the Brucejack Project, Stewart, BC
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Report to:Pretium Resources Inc.Fea
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TABLE OF CONTENTS1.0 SUMMARY ......
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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
Page 198 and 199: Table 14.9Comparison of the Mean Co
Page 200 and 201: the economic viability of the depos
Page 202 and 203: 14.15 RESOURCE REPORTINGThe mineral
Page 204 and 205: 15.0 MINERAL RESERVE ESTIMATES15.1
Page 206 and 207: Table 15.1Net Smelter Return Parame
Page 208 and 209: 15.4 MINING SHAPESAMC used the Mine
Page 210 and 211: Strike length varies considerably w
Page 212 and 213: 15.7 MINERAL RESERVESMineral reserv
Page 214 and 215: Figure 15.4Reserve Shapes and Minin
Page 216 and 217: 16.2 MINE DESIGN16.2.1 ACCESS AND R
Page 218 and 219: Figure 16.2Brucejack Twin Declines
Page 220 and 221: Figure 16.4Typical Level Plan - 1,2
Page 222 and 223: Table 16.1Development Design Parame
Page 224 and 225: Figure 16.7Mineable Stope Shapes -
Page 226 and 227: Once the stope footprint is slashed
Page 228 and 229: 16.3.3 STOPE SEQUENCEThe mining seq
Page 230 and 231: Stopes that will not be re-exposed
Page 232 and 233: Table 16.5LOM Backfilling - Waste R
Page 234 and 235: Figure 16.11Extent of Mine Developm
Page 236 and 237: • development of the 1,210 and 1,
Page 238 and 239: Figure 16.13Life of Mine Production
Page 240 and 241: Table 16.7LOM Tonnes and GradesYear
Page 242 and 243: Table 16.8Rock Mass PropertiesUnitU
Page 244 and 245: AMC estimated ore recovery in the w
Page 246 and 247: FULL-WIDTH UNDERCUTSThe Project min
Page 251 and 252: with lesser components supplied by
Page 253 and 254: un was completed representing glaci
Page 255 and 256: Table 16.12Underground Development
Page 257 and 258: TRANSMIXERSShotcrete will be delive
Page 259 and 260: The VOK Zone and West Zone mining a
Page 261 and 262: Figure 16.17 shows a ventilation co
Page 263 and 264: • regular inspection of the conve
Page 265 and 266: On low-head applications, a submers
Page 267 and 268: Figure 16.18Dewatering PlanPretium
Page 269 and 270: Figure 16.20CrusherThe 42 in wide b
Page 271 and 272: 16.9.3 POWER REQUIREMENTS AND ELECT
Page 273 and 274: Electrical power will be supplied t
Page 275 and 276: To supply service water to the high
Page 277 and 278: 16.9.7 WORKSHOP AND STORESThe maint
Page 279 and 280: Radio communications will be establ
Page 281 and 282: 16.9.11 PORTAL STRUCTUREA portal st
Page 283 and 284: propane consumption. Table 16.18 sh
Page 285 and 286: 16.10 PASTE FILL DISTRIBUTIONP&C co
Page 287 and 288: Figure 16.33Paste Fill Distribution
Page 289 and 290: Figure 16.35Pre-production Paste Fi
Page 291 and 292: RoleHeadCountMaintenance (72)Mainte
Page 293 and 294: 17.0 RECOVERY METHODS17.1 MINERAL P
Page 295 and 296: The process plant will consist of t
Page 297 and 298: 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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