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The project operation is expected to extend for five years after full development <br />activities are initiated. At tfie present time no market has been established for the <br />mine, thus the development phases cannot be more closely identified. <br />2.05.3 Operation Plan -Permit Area <br />2.05.3(11 Prodnction Methods and F,gw~ment <br />The production method will consist of a truck and shovel/loader operation. Production <br />figures were given in Section 2.05.2 above. An equipment list has also been provided, <br />with major equipment to be used. The life of the mine plan and proposed five year <br />plan are the same. Later in the operation, additional equipment may be used as the <br />mining progresses. The engineering techniques and production estimates aze those set <br />forth above. Blasting of the overburden and coal will be necessary during the overall <br />mining operation and throughout the entire time period. <br />2.05.3(21 Operation DescriQtion <br />Oakridge has reduced the maximum planned highwall in this application (1993). The <br />reduction in highwall height accordingly reduces the maximum size of the steady-state <br />• pit whi]e increasing the overall coal-to-overburden ratio. Further, the total and annual <br />amount of coal produced is decreased as is the fora] amount of overburden moved. <br />This pit optimization is in response to generalized declines in coal prices in the Rocky <br />Mountain Region. <br />The initial and largest pit is opened initially and shown on Cross Sections 4-2a (M-N). <br />The overburden from this area has been placed immediately adjacent to the west edge <br />of the pit. The maximum pit is designed to allow for ready access of materials for <br />reclamation purposes. <br />The mine plan will be presented in phases, sections, coal cut segments, and in <br />overburden lifts. Phase 1 will be developing the steady-state pit and Phase 2 will be <br />the mobile pit phase until completion of mining. Three sections (l, 2, and 3) indicate <br />the geographic location of mining activities. The coal removal has been projected by <br />"segments" which aze shown on Map 5-2 as A-1 through I-2. Overburden removal is <br />described by lift which has been shown on Map 5-2. <br />Phase I is designated as the first mining activity to be conducted at the mine. It <br />initially involves the mining of the North Pit or the "dip slope" and continuing with the <br />development of the maximum open pit which is now called the South Pit. The North <br />Pit will be mined and reclaimed First because of the low ratio coals available from that <br />pit. As the coal is removed, the low wall will be reclaimed as mining progresses due <br />Technical Revision 08 (v 1.3) 5-4 Revised 911997 <br />