080121-08MN006-Sabina Hackett River Project Proposal ... - NIRB

Project DescriptionCopper, zinc and lead concentrates will be transported by a fleet of 120 t capacity, dual trailer,side-dump haul trucks. The trailers will be fitted with hydraulically-actuated covers to containfugitive concentrate dust during transport.On arrival at site the trucks will enter a concentrate truck unloading shed where they will sidedumpconcentrate into a receiving hopper. Dust collector hoods over the receiving hopper and atthe entry and exit doors will collect fugitive dust generated within the unloading shed and directit to a bag house. On exiting the unloading shed, trucks will pass through a high-pressure waterspray system that will wash-off fugitive dust on the exterior of the truck. The wash-down waterwill report to a water treatment plant and settling pond.An apron feeder under the receiving hopper will meter concentrate onto a transfer conveyorsystem that will transport it to a concentrate storage shed where an overhead tripper conveyorwill deposit it into a stockpile. All conveyors between the unloading shed and the storage shedwill be mounted within enclosed galleries to contain fugitive dust. All transfer towers will beenclosed and equipped with dust suppression and control systems.The concentrate storage shed will have sufficient capacity to store 450,000 t of concentrates,equivalent to one year’s production. Concentrates will be separated by concrete walls to preventintermixing.Concentrates will be reclaimed by front-end loaders into a traveling reclaim hopper. The reclaimhopper will meter the concentrate onto a transfer conveyor system that will transport it to ashiploader. All conveyors between the concentrate storage shed and the shiploader will bemounted within enclosed galleries to eliminate any escape of wind-blown concentrate dust. Alltransfer towers will be enclosed and equipped with dust suppression and control systems.With a shiploader capable of loading at an average rate of 1,000 tph, it would take between fourand five days to load each 50,000 DWT ship. The shiploader will be designed to minimize theescape of fugitive dust. In addition to enclosing all conveyors, a rotating, extendable chuteattached to the end of the shiploader boom will, by controlling the flow of concentrate into theship’s hold, reduce the generation and escape of concentrate dust.2.9.5 Site Infrastructure and FacilitiesThe site infrastructure and facilities already in place as part of the BIPR project would be used bySabina. Any additional site infrastructure and facilities that may be needed to support theHackett River Project are currently being evaluated as part of the prefeasibility work.2.9.5.1 Hazardous and Non-hazardous Waste MaterialHazardous waste material that is part of Sabina’s operations will be stored in specially designatedholding areas to await transport off-site on the concentrate ships to designated disposal sites.Non-hazardous waste material will be trucked to the mine site for treatment, if necessary, anddisposal.January 2008 Hackett River Project – Project Proposal Sabina Silver CorporationReport Version B.1 2–46 Rescan Environmental Services Ltd. (Proj. #833-2)