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approximately six to eight weeks and delivered to the power station. After this period, <br /> operations will be moved to the Nucla East Mine area (see Figure 12-1). <br /> After mining has been completed in Area No. 4, operations will continue in Area No. 1 with <br /> scrapers and dozers uncovering both the Lower and Upper Dakota seams and in Area No. 2 <br /> uncovering the Lower Dakota seam. Upon completion of Area No. 2, operations will move to <br /> Area No. 3 and continue in Area No. 1. <br /> Area No. 2 is located approximately 1500 feet southeast of Area No. 4 in the NE>k of <br /> Section 36, T47N, R16W. Mining will begin on the north side, generally developing pits in <br /> a northeast-southwest orientation progressing southeasterly. Only the Lower Dakota seam <br /> will be recovered. Maximum overburden recovery depth will approach 20 feet. Coal <br /> quality may not meet specifications through this area. Should this happen, operations in <br /> Area No. 1 and No. 2 may occur concurrently to enable the blending of coal to meet quality <br /> requirements. <br /> Mining Area No. 3 is located adjacent to and south of Area No. 2, in the NE>k Section 36, <br /> T47N, R16W and NW>k Section 31, T47N, R15W. Pits will initially be sequenced in an <br /> east-west progression and orientated generally north-south. As shown on Exhibit 12-2 <br /> however, later pits on the southeast side are oriented to prevent excessive downslope <br /> disturbances. The maximum overburden depth will approach 20 feet. The Lower Dakota seam <br /> will be recovered. Coal quality may not meet specifications through this area. Should <br /> this happen, operations in Area No. 1 and No. 3 will occur concurrently to enable the <br /> blending of coal to meet quality requirements. <br /> Area No. 5 is located approximately 1,000 feet northeast of the former shop building in <br /> the SEkSEk of Section 25, T47N, R16W. This area will not be mined due to low coal <br /> quality and is shown on Exhibit 12-2. <br /> After mining has been completed in Areas No. 1 and No. 3, operations will move into the <br /> Nucla East area (see Figure 12-1). The Nucla East area is located in Section 61, T47N, <br /> R16W and approximately 8,000 feet southwest of the current mining area (see Exhibit 12-1). <br /> Only the Lower Dakota coal seam will be recovered. Maximum overburden depth will approach <br /> 45 feet. Mining will begin along the eastern cropline of the Nucla East area and use a <br /> block mining technique to develop the pits (see Exhibit 12-3). The blocks will average <br /> approximately 400 feet long and 150 feet wide. Mining will generally progress to the <br /> 12-2 Revised 08/19/88 <br />