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Chapter II <br />c. Non-coal Refuse Disposal. <br />Non-coal waste will be handled and disposed in accordance with CMLRB regulations, section <br />4.11.4 -Disposal of Non-coal Waste. <br />(1) Solid Non-coal Waste Disposal. <br />Solid non-coal waste will be disposed in the approved solid waste disposal sites, which is <br />situated at the toe of the rock tunnel fill. <br />Waste material will be covered over and compacted when ground conditions are sufficiently <br />dry, during the period after snowmelt and prior to snowfall. The operator will avoid coverage <br />and compaction when ground conditions are wet or snowcovered and frozen. When the mine <br />is operating coverage and compaction of the trash pile will be done monthly during the months <br />July through October, and as ground conditions allow during other months. <br />(2) Liquid Waste Disposal. <br />Petroleum products are collected and stored temporarily at the maintenance shop prior to <br />being removed from the mine site for re-cycling. Oil cans and drums, containers for lubricant <br />and hydraulic fluid will be collected at designated areas prior to being removed from the mine <br />site for disposal. Concrete containment structures will be installed at the rock tunnel and <br />central yard complex areas as part of preparation for resumption of mining. Such <br />preparations are anticipated during fall, 1992. These areas are designated on the revised map <br />II-B-7 as "petroleum containment areas." <br />9. UNDERGROUND DEVELOPMENT WASTE <br />a. Rock Disposal Area <br />Material excavated in the construction of the rock tunnel has been placed in the designated <br />tunnel fill area. Mid-Continent estimates that approximately 365,000 cu. yds. of material has <br />been placed in this facility. The approved waste design for this facility has a capacity of 1.08 <br />million cu. yds., so there is substantial excess capacity in the facility. <br />Mid-Continent anticipates that material excavated in further underground development work on <br />the tunnel and on the raw coal 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 spread on the waste pile so as <br />to maintain a perimeter slope at the ratio of 2h:1v or less. <br /> <br />44 <br />Revised 6/92 <br />