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• Disposal of Excess Spoil <br />As discussed under the heading of Production Methods and Equipment in Section 2.05.3, <br />Colowyo has constructed an overburden disposal structure known as Streeter Fill. During the <br />early operation, overburden had to be placed into the Streeter Fill so that sufficient working <br />area could be developed prior to the placement of subsequent overburden into the mined-out <br />areas. <br />Additional information concerning the Streeter Fill is set forth in Exhibit 12, Experimental <br />Practice Information. In the initial five year permit term, the Streeter Fill was permitted as an <br />Experimental Practice. In 1986, the Experimental Practice designation was terminated. <br />However, in the interest of continuity, information regarding Streeter Fill is still located in <br />the Experimental Practice Section. <br />Two additional pits will be developed within the permit boundary at Colowyo. One of the <br />pits will be developed in Sections 15 and 16, south of the existing operation and the other pit, <br />defined as the West pit, will be developed in Section 4. <br />• <br /> <br />2.05-35 Revision Date: 9/20/02 <br />Revision No.: RN-04 <br />