Feasibility Study and Technical Report - Pretivm

from the site. Fixed equipment, such as electrical cables and pipes, will be leftunderground.The underground workings will be progressively backfilled with tailings and waste rockthroughout mine operations and, once mining is completed, the underground will beallowed to flood. The ventilation shafts and underground portals will be sealed withconcrete plugs. The plugs will be equipped with outlets in the event the water table risesin the underground workings and some seepage occurs, which is not expected in the twonew mine portals but may occur in the existing portal. The seepage water from theexisting portal will be monitored post-closure and directed to Brucejack Creek.Closure of the above-ground facilities will include the removal of all buildings andstructures on site, including the camp and mill. The buildings will be dismantled and thematerials will be taken off-site for reuse or recycling. All oil, fuels, and processing fluidswill be drained from equipment before the equipment is removed, and disposed of in aregulated facility off-site. The processing equipment will be removed from site and soldor recycled. Any concrete foundations will either be left in place or broken up andpossibly used as backfill. All gravel surfaces will be ripped, such as the helicopter padand the roads, to increase water infiltration and reduce the potential for surface erosionand instability. The above-ground pipes that carry tailings to the lake and the turbiditycurtain will be removed and disposed of off-site.The transmission line will be dismantled. The wooden poles will be left in thetransmission line right-of-way to degrade naturally, and will be strategically located acrossthe right-of-way to discourage vehicle access. The cables and transformers will beremoved off-site and sold or recycled.The access road will be decommissioned. The culverts will be removed and naturaldrainage will be restored. The bridges will be dismantled and the materials will beremoved from site. Wood material may be burned under controlled conditions. Somewood will be strategically placed on the roadway to limit vehicle access. The road surfacewill be ripped to increase water infiltration and reduce the potential for surface runoff.Soils will be spread on the surface where soil is available and the areas will be revegetated.All other structures related to the mine will be removed and sold or recycled.The cost to dismantle the above structures and to close the various facilities has beendeveloped.20.2 CERTIFICATION AND PERMIT REQUIREMENTSMining projects in BC are subject to regulation under federal and provincial legislation toprotect workers and the environment. This section discusses the principal licences andpermits required for the Project.Pretium Resources Inc. 20-22 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC