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• Overburden Removal <br />2 backhces (10 cu. yd.) <br />3 dozers w/rippers <br />I overburden drill <br />4 haul trucks (50-ton or larger) <br />1 powder truck (explosive) <br />2 25-cu. yd. scrapers or larger <br />Maintenance ui ment <br />I lube truck <br />2 mechanics trucks <br />3 welding trucks <br />1 fuel truck <br />Coal Removal and Processine <br />1 portable "in pit" screening station <br />Reclamation ui ment <br />1 dozer (D-9 or larger) <br />125-cu. yd. scraper <br />1 motor grader <br />1 comb. front-end loader/backhce <br />1 disk (mulching) <br />1 front end loader <br />Miscellaneous uipment <br />1 water truck <br />1 motor grader <br />1 light plant <br />1 water pump and piping <br />1 power sub-station <br />1 coal drill <br />• 2 front-end loaders (7 yd.) <br />NOTE: All subject to change as the mining progresses. <br />The mining method is an open pit style surface mining method designed to extract <br />several seams that dip at an angle of 26 to 30 degrees and outcrop in a <br />northeast/southwest direction across hill and valley arrangements. The planned pit <br />covers an azea of 36.75 acres and is bounded on three sides by the highwall limits or <br />restricting ratio limits for the planned pit. <br />The life of the mine currently known has been shown on Map 5-1. Subject to the <br />necessary approvals from the Division, nothing in this section shall preclude the <br />permittee from expanding the pit in any direction if economics and exploration activity <br />so indicates that recoverable reserves exist. If the life of the mine changes, the <br />permittee will appropriately amend and/or modify this mine plan and life of the mine <br />projections. <br />The engineering techniques used in the planning and design of the Carbon Junction <br />Mine are those basic to an open pit mine using struck/shovel operation. A planned <br />limiting ratio or an economic limit is generally established by using the projected cost <br />of overburden removal versus revenue received for the coal. The stability of the <br />highwall is then examined and the pit is excavated by an "layered" or "lift" plan. The <br />• <br />Technical Revision 08 (v 1.3) 5-2 Revised 9/1997 <br />