Feasibility Study and Technical Report - Pretivm

level. The schedule indicated that a steady state production rate between 2,700 t/d and3,000 t/d would be achievable.In consultation with AMC, Pretivm approved the conservative end of the estimate,2,700 t/d, as the target rate. Further scheduling performed on the detailed mine designconfirmed the 2,700 t/d rate to be achievable with a high level of confidence.16.4.2 PRE-PRODUCTION DEVELOPMENTPre-production underground development will occur over an approximately 24-monthtimeframe before the first stope is extracted. Development drive ore produced duringthis period will be hauled directly to a surface stockpile pending commissioning of theconveyor hoisting system. Crushing of this early ore will be performed on surface.The development strategy targets the VOK upper block as the first priority, followed by themore distant middle and lower blocks to sustain production. Development andconstruction of significant mine infrastructure including the declines, 1,330 Levelworkshop area, and crusher will be accomplished in parallel with the development of theVOK orebody.Development of the West Zone will be deferred until the second half of the mine life,given the significantly lower-grade of mineralization.The first stopes will be extracted between the 1,360 Level and 1,390 Level of the VOKZone area. Critical path pre-production activities include:• establishment of exhaust raise VR2 to support the development of the crusherarea and workshops on the 1,330 Level• access development to the top and bottom of the crusher chamber excavationand support of the crusher chamber, and installation of the crusher• twin decline development from underground to the surface portal; whenbreakthrough is established, the ease of transport of materials and equipmentfor construction activities will be improved and conveyor installation cancommence• excavation and construction of the maintenance workshops, magazine, fuel bay,and other ancillary installations• development of the VOK ramp to the 1,360 and 1,390 levels, development ofthe levels, and establishment of exhaust raise VR3.Figure 16.11 illustrates the extent of development required for the main onset of stopeproduction between the 1,360 and 1,390 levels. A total development requirement of14,504 lateral metres and 780 vertical metres is planned in the first 24 months. Up to660 m/mo of development advance will be required at the peak activity level. Relative tocompany strategy and goals beyond the feasibility study, AMC believes that opportunitiesmay exist for further optimization of the development and production scheduling.Pretium Resources Inc. 16-19 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC