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Section 816.100 Continued. <br />• material from the north end of the overburden stockpile to bring the <br />existing backfill in the northern end of the 720 Pit to grade. <br />Approximately 750,000 BCY were required to establish final grade in the <br />north end of the 720 Pit. <br />Total overburden stockpile volume was approximately 7.5 million BCY in <br />April 1989. Between April 1989 and April 1990, approximately 400,000 <br />BCY of material were moved from the overburden stockpile to the 720 Pit. <br />With dozing of approximately 350.000 BCY into the 720 Pit during the <br />next 1.0 to 1.5 years, and movement of approximately 750,000 BCY into <br />the north end of the pit during the following 2.0 to 2.5 years. <br />approximately 6.0 million BCY remained in the overburden stockpile upon <br />completion of mining in Pit 1. <br />Upon completion of mining in Pit 1, available equipment as well as an <br />expanded fleet of leased equipment was dedicated to final backfilling <br />and grading of the 720 Pit and Pit 1. Kerr Coal established backfill <br />dumps in the north, central, and southern potions of the 720 Pit to <br />• facilitate final backfilling and minimize haulage distances. Backfill <br />placement and final grading resulted in final slopes not exceeding <br />3H:1V. <br />With approximately 6.0 million BCY remaining in the overburden stockpile <br />upon completion of mining in Pit 1, the existing equipment fleet would <br />have completed backfilling of the 720 Pit in approximately 6.0 years at <br />a rate of approximately 1.0 million BCY annually. Therefore, completion <br />of backfilling of the 720 Pit would have required a total of <br />approximately nine years and would have been completed in 1999. <br />Given that Kerr elected not to develop additional reserves beyond Pit 1. <br />backsloping and final reclamation of the northern portion of Pit 1 was <br />initiated in July 1993. Backfilling, backsloping. and final grading <br />consistent with the approved reclamation plan were completed in January <br />1994. In order to resolve outstanding AOC issues, Kerr has committed to <br />complete supplemental backfilling in the Pit 1 reclaim area. Kerr <br />currently plans to complete supplemental backfilling during the 1995 <br />field season. <br />)L.3ISECTION.816 <br />9:12em WP51lcmc 816-124aaaaaaaa Revised 01/30/95 <br />