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Section 2.05.3(9) Underground Development Waste <br />A narrative describing the proposed disposal methods and sites for <br />placement of underground development waste and excess spoil <br />generated at surface disturbances by surface operations and facilities. <br />The present underground development waste disposal site is <br />located in and around an old strip pit on the east side of the <br />present and proposed surface operations. Refer to the Proposed <br />Surface Disturbance Map, 2.05.3(2)(b)-1. The majority of the <br />material to be deposited at this site will be unmarketable material <br />mined underground, consisting of rock from the floor and roof, and <br />coal. Occasions to generate such waste are: grading floor or roof <br />for clearance, unintentional roof falls, accidental mining of <br />roof or floor, cleanup, and other operations causing a high ash <br />content in the coal. The cut-off in ash content depends upon <br />the market. <br />The waste is shipped on the same belt as the coal, but is <br />shipped at different times to allow segregation on the surface. <br />The waste is temporarily stockpiled in the yard area. <br />The amount of waste generated is estimated to be 15~ of annual <br />coal production in the Red Canyon #1 Mine and 58 of the annual <br />production in the Red Canyon R2 Mine, 16,000 cubic yards and <br />14,000 cubic yards, respectively. Refer to Section 2.05.3(1) for <br />mining projections. <br />The soil resource information is given in Section 2.04.9. <br />Limited topsoil is available due to the previous disturbance and <br />the shallow topsoil depths. Sample T-2, Table 2.04.9(1)(b)-2, <br />was taken to represent the topsoil chemistry in the area, and O-6 <br />and O-7, Table 2.04.9(1)(b)-2, were taken to represent the over- <br />burden available for nontoxic cover and possible topsoil replacement. <br />The vegetation resource information is given in Section 2.04.10. <br />The surrounding area is primarily covered with cedar and associated <br />undergrowth. <br />The site is drained into the disturbed drainage system, which <br />will route all runoff through a sediment pond. Refer to Sections <br />REVISED November 15, 1983 121 <br />