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4 <br />The design will result in a complete set of specifications <br />from which all components can be ordered, assembled, installed <br />and operated. The system cost, component power consumption and <br />delivery time of each component will be determined. ` <br />Waste Preparation and Injection into Hydraulic Lines <br />The complete surface system design, including preparation <br />plant changes, will be specified as discussed in the conceptual <br />design section. The surface system design will include: <br />a. Coarse refuse crushing to a 2 in. top size <br />b. Formation of the coarse refuse slurry <br />c. Pumping of both the coarse and fine refuse slurries <br />d. Flow monitoring instrumentation <br />e. Alternative surface system for emergency storage of <br />the mine refuse. <br />Pipeline Selection <br />The pipeline for coarse slurry, fine slurry and return water . <br />will be sized and specified. Selection will consider wear and <br />corrosion resistance, cost, maintenance and ease of installation. <br />Provisions will be made for freezing protection and clean out <br />access where required. Provisions will also be made in the <br />slurry lines for insertion of pipe sections which have been con- <br />structed from various materials. This will provide additional <br />pipe wear information. <br />Dewatering System <br />The dewatering system is discussed in detail in the concep- <br />tual design section. The major components include: ~ <br />a. Coarse refuse double-deck dewatering screen <br />b. Solid bowl centrifuge for fine refuse dewatering <br />c. Sumps and return water pumps for water return to the <br />wash plant. <br />• <br />