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1 <br /> 1 <br /> ' the milling process, and substantial, separate foundations <br /> have been included in the mill building' s design. The <br /> erection of the steel frame, and the attachment of the metal <br /> ' wall and roof panels, proceeded along with the necessary <br /> plumbing and electrical work. An internal wall, insulated on <br /> both sides to reduce noise and dust, separate the crushing <br /> t plant from the grinding circuit on the upper level of the <br /> mill. Three coarse ore bins, one fine ore bin, and a <br /> thickener tank were fabricated from steel at the millsite. <br /> The total amount of the surface acreage affected by the <br /> construction of this building, the three coarse ore bins, and <br /> the associated receiving and shipping areas of the milling <br /> facility is . 389 acres. <br /> ' A 30 by 40 foot metal building is planned to house an assay <br /> laboratory and mill office that will be built following the <br /> completion of the millsite. This building will be <br /> constructed southwest of the millsite, on the patented Oscar <br /> Lode, between the 8, 590 and 8, 595 foot contour interval (see <br /> ' Map A) . The total affected land surface that will be <br /> involved in the construction of this building is . 027 acres. <br /> Because the mill processes both gold-silver tellurides and <br /> ' various combinations of gold-silver sulfides, it has been <br /> designed as a composite system of gravity and flotation <br /> concentration. The ore processing flow chart shows <br /> ' diagrammatically the sequence of operations that take place <br /> in the plant (Exhibit 1) . It is a simplified version of the <br /> flow sheet that was used to design this concentration mill. <br /> The flow sheet was developed to decide the number, types, <br /> ' sizes, and capacities of the processing machinery to be <br /> installed in the milling facility. This information <br /> determined the positions of the machinery with respect to one <br /> ' another, and the quantities of ore and water in transit at <br /> every point throughout the mill. Power requirements for each <br /> piece of equipment established the sizes of the motors that <br /> ' will be connected with the milling machinery. Laboratory <br /> experiments and pilot tests were also factored into the <br /> choice of this flowsheet, which resulted in the final mill <br /> design. <br /> ' Ore from COX Inc. /Homestate Inc. mines will be transported to <br /> the millsite in a small dump truck, and unloaded into one of <br /> two coarse are bins. These ore bins feed the crushing plant, <br /> which incorporates primary and secondary crushers in a <br /> closed-circuit. After crushing, the ore is stored in a fine <br /> ' ore bin with enough capacity to insure a 12 hour supply of <br /> ore for the grinding and concentrating circuits of the mill. <br /> This fine ore is then conveyed to the grinding circuit if <br /> needed to complete the comminution process. Fresh water will <br /> ' be added to the ore for wet grinding in a ball mill that will <br /> be in closed-circuit with a spiral classifier. Gravity <br /> concentration will follow the grinding circuit, with <br /> ' separation being accomplished by a double Jig and a shaking <br />