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(1) (2) (3) <br />(4) <br />Overburd Coal' Wast <br />Total <br />en BCY e <br />Excavated, <br />BCY BCY <br />BCY <br />Mined as of 925.7 127.5 17.8 <br />06/30/10 <br />Remaining life of 25.4 3.5 0.5 <br />mine in West <br />Pit <br />Total Mine 951.1 131.1 18.3 <br />'Coal conversion based on 1.1 tons/BCY <br />2Average swell of 20 percent <br />RULE 2 PERMITS <br />(5) <br />(6) <br />Swelled <br />Excess <br />Overburden • <br />Spoil, <br />LCY <br />LCY <br />1071.0 1132.2 68 <br />29.4 31.1 0 <br />1100.5 1163.3 68.0 <br />Total Mine Excess Spoil 68 LCY <br />Streeter Fill -47 <br />West Pit Fill -19 <br />Section 16 Fill - 2 <br />Excess Spoil Remaining 0 LCY' <br />'Streeter Fill, West Pit Fill and Section 16 Fill are considered complete and will not see <br />any additional spoil placed in them as a result of future mining in the West Pit. <br />Any remaining Excess Spoil would be utilized to achieve the postmining contours shown on Map <br />19. Detailed geotechnical investigations were completed for both the West Pit Fill and the Section <br />16 Fill by CTL/Thompson, Inc. Reports of the investigations are found in Exhibit 19. <br />Construction plans for the fills, addressing the requirements of Rule 4.09, Disposal of Excess <br />Spoil, can also be found in Exhibit 19. <br />The topography following mining and reclamation activities is shown on the Postmining <br />Topography Map (Map 19). Cross sections relating the premining and postmining topographic <br />configurations are presented as the Premining and Postmining Cross Section Maps (Maps 20 and <br />20A). <br />In the initial permit application, Map 30, Experimental Practice Design, showed the proposed <br />Streeter Fill design. In the current application, the title of Map 30 has been changed to Streeter <br />Fill Design and As -Built, to reflect termination of the Experimental Practice designation, and <br />provide an as -built drawing of the constructed fill. As shown on Map 30, the minor differences <br />between the design and the as -built configuration are insignificant. The primary difference, which <br />increases stability, is the change in the top elevation of the fill from 7300 feet in elevation to 7200 <br />feet. <br />Rule 2 Permits 2.05-18 Revision Date: 5/25/18 <br />Revision No.: RN -07 <br />