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2-21 2.4 REFUSE AREA • Salt Creek Mining proposes to develop a coal refuse disposal area designed to contain all underground development refuse and coal processing refuse that may be generated during the life of McClane and Munger Canyon Mines. This refuse is generated during the benefication or washing of coal, or in the event of roof falls and clean up operations. Located approximately one mile south of the central facilities area (as shown on Figures 2.2-7.15 through 2.2-7.45), the refuse area can best be described as a combination of side-hill and non-impounding valley-fill. Although the major portion of the area will be on the flat valley bottom, at no point will it dissect the valley bottom. The final configuration shown in Figure 2.2-7.45 will contain approximately 2,600,000 cubic yards, which is sufficient to handle total anticipated mine refuse. The amount of refuse may be considerably less, depending upon develop- ment refuse generated and the amount of coal washed; therefore, • four configurations of the refuse area are depicted. Refuse will be transported to the refuse area from central facili- ties with rubber tired scrapers. A road will be constructed as shown in Figures 2.2-6.15 through 2.2-6.35 for access to the site. Compaction of the refuse will be accomplished with selective rout- ing of the scrapers (see Section 2.3.21. All runoff from undisturbed areas will be diverted from the site and all runoff from the site will flow through a sediment pond. 2.4.1 Nature of the Refuse Refuse will be removed from the mined coal in two ways. First, all coal mined will be processed through a rotary breaker. This breaker is designed to separate coal from the harder and larger refuse. The breaker is essentially an inclined rotating cylinder. Run-of-mine coal is introduced to the interior of the cylinder at • the elevated end, passing through the cylinder as it rotates.