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Chapter II <br /> 9. U11DERGROUND DEVELOPI= WASTE <br /> a. Rock Disposal Area. <br /> Material excavated in the construction of the rock tunnel has been <br /> placed in the designated tunnel fill area. Mid-Continent estimates <br /> that approximately 365,000 cu. yds. of material has been placed in <br /> this facility. The approved waste design for this facility has a <br /> capacity of 1. 08 million cu. yds. , so there is substantial excess <br /> capacity in the facility. <br /> Mid-Continent anticipates that material excavated in further <br /> underground development work on the tunnel and on the raw coal <br /> storage facility will be placed on the approved tunnel waste <br /> disposal area until the facility reaches capacity. <br /> In construction of the current pile, the tunnel spoil material was <br /> spread on the waste pile so as to maintain a perimeter slope at the <br /> ratio of 2h:ly or less. <br /> w -- <br /> 44(a) Revised 12/91 <br /> TR-24 <br />