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<br />. _. <br />s <br />Memo - Steve Renner - 2 - April 15, 1992 <br />J. Irrigation would be implemented if severe drought conditions warranted it. <br />(9/84) <br />K. Weed and pest control would be implemented. (9/84) <br />L. Although not mentioned in plan, reseeded areas would need to be fenced. <br />(3/92) <br />M. A vegetative sampling program would be implemented. (9/84) <br />N. NPDES and APCD permits would be maintained. (9/84) <br />0. Redressing of gullys and rills forming to depths of over 9" would occur. <br />(9/84) <br />F. A grazing management plan would be submitted once vegetation was <br />successfully established. <9/8a) <br />5. Important Specifics: <br />A. The highwalls in the East Pit would be regraded to 2H:1V. This would <br />include having the highwalls reeuced, c9/84) <br />E: stockpile #2 would be eliminated, but Stockpile #1 would remain. It's <br />`Cruwn .~cu-'.d be leveled to an elevation of 6,200, which would leave it at <br />forty-five fees in height.and approximately 2,000 feet in circumference at <br />it<. base. Stockpile .al's ramairir.~-side slopes ~,+ould also be left at <br />2H:1V. :4/84) ~- <br />C. The East Pit would be configured ~o handle the 10-year, 24-hour storm <br />event, with a longitudinal channel gradient of- nc steeper than 157.. (9/84) <br />D. Subsoils would be replaced to a depth of two feet over all disturbances, <br />with topsoil being replaced to a depth of four inches. (9/84) <br />E. The cost for reclaiming the East Pit would come to 5445,000, as estimated <br />by Carl Mount in 1989. However, this cost estimate did not include <br />measures for ensuring erosional stability on steep slopes <br />(e.g. jute netting), and was not adjusted downward fur cost savings due to <br />the highwall being used for a portion of the East Pit fil'.. The cost <br />estimate also did not account for any indirect costs (mob/demob, contactor <br />profit, etc.>, nor for maintenance of the site following reseeding. <br />F. The total cost for reel?oration of the entire site is estimated at <br />5675,000. This is base~.i on the 54x5,000 East Pit figure plus estimates <br />derived in February 1992 for reclamation in Section 24 (560,742), <br />additional reclamation in Section 30 (SZ9,762), mobilization/demobilization <br />of equipment (525,000) and 20'7 indirect costs (5112,100), rounded up from <br />8672,604. <br />DIH/ern <br />2215E <br />