Feasibility Study and Technical Report - Pretivm

• the design of special towers to span the snowfields and larger snow avalancheareas• the use of single-steel monopole towers with helicopter placement, to lengthenthe spans between structures and eliminate the need for an access road ortrack along the transmission route• limited tree clearing with no removal (trees bucked and left in place along thecorridor).Valard’s report on the Brucejack Transmssion Line contains additional information and adiscussion of these constraints.18.7.3 TRANSMISSION LINE OPERATIONS, MAINTENANCE AND EMERGENCY RESPONSEOnce constructed, the transmission line will be controlled out of the Brucejack Substationat the Project site with the main switches located at the interconnection at LLH. It isunderstood that the operation of the Brucejack Substation and Brucejack TransmissionLine will very likely be carried out under a joint operating order with BC Hydro, as it is forother industrial customers. The joint operating order establishes the procedures andcommunication protocols for operation of the Brucejack Substation to protect anytransmission line workers and the integrity of the BC Hydro system.Maintenance of the Brucejack Transmission Line will consist of visual inspections alongthe transmission line, as well as periodic infrared surveys to look for potentialdeterioration in splices or other energized components. This will be complemented witha periodic inspection of the transmission line towers, with climbing inspections to ensurethe functionality of all conductors, guy wires, crossarms, and other transmission towercomponents. Emergency response will also be important to manage the risk to thetransmission line, with temporary wood poles kept at a central location to facilitate rapidresponse and restoration in the event of extreme weather damaging the transmissionline.18.7.4 TRANSMISSION LINE FEASIBILITY BUDGET ESTIMATESCapital and the operations/maintenance costs were developed for the transmission linebased on engineering and construction criteria previously described. In both casesValard included the available project information as well as its experience and expertiseas a specialty transmission line contractor to estimate the costs.The capital cost estimates are based on the following:• The estimate includes the direct costs for procurement, construction, andcommissioning of the transmission line for the preferred route.• The estimate includes the indirect costs for the Project including engineering,project management/administration, camps, and other common costs for largetransmission or construction projects.Pretium Resources Inc. 18-27 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC