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SPECIFICATIONS <br />GENERAL <br />The following specification covers the materials and execution for the construction <br />of the refuse disposal sedimentation pond at the New Elk Mine. <br />MATERIALS <br />Embankment Materials. All material incorporated into the refuse pond shalt be <br />clean, cohes.~ve fill from the designated borrow areas. It shall be free of vegetable <br />matter, foreign material, frozen lumps or any other deleterious matter. <br />Emer ency Spillway. Gabion baskets shall be laid in the emergency spillway <br />channel. <br /> <br />Princi le Spillway. The principal spillway shall be constructed of 24 inch ~ CMP <br />with 3 inch try 1 inch corrugations. The CMP shall be galvanized and coated with a an <br />asphalt mastic coating. Principal spillway pipe shall be a minimum of 14 gage. ' <br />EXECUTION <br />Clearing and Grubbing. Wyoming Fuel Company will establish clearing lines within <br />which the ground shall be cleared of all trees, stumps, brushes, weeds and any other <br />objectionable material. All grub material shall be removed to the designated area south <br />of Highway 12 near the topsoil stockpile. <br />To soil Removal. All topsoil within the limits of the embankment shall be removed <br />and stockpiled in the designated areas south of Highway 12. This will represent <br />approximately 8 inches of the top layer of soil. <br />Rock "'oe. The rock toe shall be constructed to one-fourth the height of the <br />embankment.. Rock shall be 6 inches to 24 inches on the longest dimension and should be <br />sound quarry or river rock. <br />/_ <br />-5- <br />