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• P-4 <br />As previously noted in the mining plan, backfilling o fines <br />and spoil piles will take place during the course of fining, <br />Consequently, shaping of back-slopes to a grade of 3:1 or flat- <br />ter will also begin as mining proceeds from east to w st along <br />the north boundary. However, redistribution of topso'1 and <br />final seeding will be done when a determination of th quality <br />and extent of the deposit can be made in Phase 1B and Phase 2, <br />In a worst case situation, the extent of the deposit ill prove <br />to be very limited and/or of poor quality. In such an event, <br />the operator would reclaim all area disturbed since 1972, which <br />is confined to most of Phase lA and the south end of 1 and a <br />relatively small area along the east boundary of Phase 3. These <br />areas can be readily recognized on the site. The prese t stock- <br />pile areas would also be reclaimed. <br />By contrast to a worst case, the best case would ident'fy deep <br />deposits of quality material, especially along the wes bound- <br />ary. The operator could plan to expand the designated boundary <br />and in time remove a large portion of the bluff adjace t to his <br />cropland. However, since the best case seems doubtful the fol- <br />lowing reclamation plan addresses a middle case. <br /> Upon completion of mining along the north boundary in base lA <br />3•,l and Phase 2, the final embankment will be shaped to a :1 or <br /> flatter grade. When final reclamation is undertaken, the sur- <br /> face will be scarified to a depth of 10-15" to insure ood <br /> cohesion between the topsoil and subsurface material. The top- <br />y <br />~~8 TS soil will be redistributed to a depth of 6 - 8" and '.i htly <br />~ compacted. In the event of a shortage of topsoil, any remaining <br />~ areas will be supplemented with organic fertilizer at rate of <br />~ <br />AAA 12 - 15 tons per acre. In addition the entire seedbed will be <br />' treated with commercial fertilizer at rates based upon soils <br /> analysis at the time of seeding. All slopes will be gr ded to 3:1. <br /> Following seeding, the seed bed will be mulched with 1 ng stem <br />~,.cN <br />~ <br />~ native hay or clean straw at the rate of 4,000 lbs. pe acre. <br />' <br />/ The mulch will be anchored to a depth of 4" with a wee hted disc <br /> plow, with the blades set straight. <br />~~D Seeding will be done with a grass drill after October st when <br />D!`~~ the grouted is too cool to permit seed germination, but before <br />Sj April 15th, in order to take advantage of spring moist re and <br />to get a headstart on annual weeds. nitrogen fertiliz r will <br />be added the first fall after a seasons growth in orde to re- <br />duce weed competion in the first year. <br />The following grass seed mixture has been recomended b the <br />USDA Soil Conservation Service Agronomist serving Bent County. <br />Species <br />Blue Grama <br />Sideoats Grama <br />Westen~ Wheat <br />Sand Dropseed <br />Yellow Sweetclover <br />%wMix Straight PLS lbs. <br />25 3 <br />25 9 <br />25 16 <br />25 0.5 <br />J 1DS <br />0.75 <br />2.25 <br />4.00 <br />0.13 <br />0.50 <br />