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i i <br />- ? - November 29, 2000 <br />because the concurrent reclamation acuvmes will placz stockpiled topsoil on the fuush grade pet floor <br />and adlacenr 3:1 slopes leacmg room for subsequent topsoil stockpthng. in buffer zone areas. <br />4. As stared in Exhibit D (a) paragraph 5, "A 3 to 1 (3H.1 l~ slope profile will he estabhshed around the enure <br />excav°ated perimeter (except ramp areas) from the toe of the pit to the top inside edge of the perimeter <br />buffer zone areas." These slopes will be mined at final grade :ts per our cunvers'auon on I 1 /21 /2f1i u). <br />:i tiering the slopes at a final planned reclamation grade of 3:1 will reduce [he ultimate cost of sae <br />reclamation acuviucs and also provide 'a more stable slope than a cu[ and fill slope. <br />5. As stated above, as muting acuviucs progress across the pet floor areas, penmeter/intenor pit slopes will be <br />mined at a slope of 3a. The 3:1 slope length of the interior hrghwall that will exis[ a[ anv~ time during the <br />operation for an average 25-foot deep excavation would be approximately 75 feet in length. Highwalls <br />greater than a 3:1 slope mar cxtst during mining activines (to the inside areas of the pit), however, as <br />nnning operauons approach the toe of any inside pit perimeter 3:1 slope, the slope ~~ill then be mined a[ <br />final grade so that fill marcn:d wi0 not he required. <br />G. "Ph: scale planned to 6e used at the proposed area of operauons ~~ill be a temporary/mobile/portable <br />truck scale and will not regture any permanent footers and/or stem walls. <br />7. It is agreed that the buffer areas are affected areas and as such, it is specified that the proposed area of <br />excavation is 35 acres and the affected area is the enure 3S GS acres conurinerl wrthm the permit <br />boundaries. <br />8. as' part o[ the reclamation plan, the approximate 3.65 acres which call be occupied by topsoil stockpiles <br />gill be included in the proposed plans and specifications contained in Exlnbrt E -Reclamation Ylan. The <br />seed mix and cosrs contained in Exhibit L -Reclamation Costs are based on reclamation of 38 acres. The <br />cos[ of reclamauon For the additional .GS acres would be less than $looo.oo in addition to the total <br />estimated reclamauon cost. The total red:unauun cost .vould be $32,3'd.ll0 Cor the Full 38.65 acres. Our <br />reclamauon cost estvnate ul less than $85(1.00/acre is due to [he faa that ore plan concurrent reclamation, <br />own and operate the necessarc equipment needed for the recamanon :tcnvmes and that the 3~1 slopes w-rll <br />be mined at final grade ehmmanng the need for till material placement. (see # Ill below for addmonal costs <br />for mulching) <br />9. .Any calcareous soils encountered during topsoil snipping operauons evil] be isolated from the topsoil to he <br />stockpiled. The use of scraper mpe equipment will allow the topsoil material to be removed and <br />segregated from above the c:dc;aeous soil horizon. Calcareous soils will be mined, mixed and or processed <br />along with the unded}'inG rock and gravel marenal and hauled offsite. <br />10 .~[ the Dieisior:'s recemmendarinn, a cernfied weed free straw mulch Brill be apphed and crimped into the <br />idled topsoil at an apphcation rare of at least 15 tons per acre m order rn faahtate the quick estabhshment <br />of vegetation. The estimated cost per acre to shred, apply and crimp straw mulch rs $250/acre. The total <br />added cost to apply mulch to 38.65 acres is $9662.50. This additional cost added to the adjusted cost <br />estimate in #8 above would make the total esuma[ed cost fur reclamauon $a2,03C,.5(I. <br />11. The use of compost material for reclamauon acuvtues was not specified in [he Exhibit E -Reclamation <br />Plan but is contamcil m the USllA attachment [o Eshibrt E. Exhibit L - Keclamarion Costs does' include a <br />cost hoe item fur compost matcu~al and placement. The use of compost matenal in the reclamation of <br />soils at the si[e would be to increase both [he org:uuc/nuuaent content of the topsoil and the ability of [hc <br />topsoil to retain moisture. <br />There were no specific rrcommendauons from \Ir. Tram :ihller of the USDA Soil Conservanon Service, <br />Center, Colorado office wncerning fertrhzer, mulch or compost appucanons and amounts for reclamauon <br />at the proposed site (see attached USD.1 Seeding Plan). However, the USllA attachment to both Exhibits <br />E •and L contain the "ntgge>ted" Standards and Specifications for Cnucal Area Ylanung vvluch mat' he <br />