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05/11/1995 14:45 719 ABEL ENGINEERING <br />• • <br />EXHIBIT D <br />MINING PLAN <br />TAc following is a getuml description of the Mining Plan to be followed by Culler County I{ighway <br />Depanmem in the operation of the "Custer County Grace( Pit (M-093)'. <br />PERMIT AREA DESCRIPTION: <br />The area covered by [he Pre-Mining map (E~Itibit C) represents a quarter section which is <br />entirely owned by Custer County. It totals appravimately 160 acres. <br />PAGE 09 <br />The Northeast quarter of that area (appmumately 40 acres) is permitted and cvmntly being used <br />as a Solid Waste Disposal Facility known as the "Custer Counry landfill'. <br />~) ~~ (~ f iD ii !n the NonMvu~t ggarte a map is the "PERMfi AREA"tas a of a minimum of ~ 57 ~~ <br />P ~J u _ fi[ty(SU) feet h s been indicate r the west edge to allow fo vehicle movemrnl nd~ . _.._~j <br />~R+/ ~I ~ vanance m t e boundary line location. A current section survey wes not performed; the btdfer I'~ ~^'+~ <br />1 zone will also assure that the section boundary lime is not encroached upon. All gravel pir work $D R y <br />will be performed within the by the "PERMIT AREA" boundary. The area within I <br />the boundaries is appro~itnat ly 4 25 a rs. <br />Test pits and bore holes w~erc dug during the field investigation for the Solid Waste Disposal <br />Facilih~, three of the test pits were dug within the gravel pit 'PERMIT AREA". The gravel e.~ists <br />in irregular layers along with lenses and layers of mod, silt and silty sand. Ocpsionally clay was <br />enconnured. Gravel was found to gists down to seventy five(75) feet below the surfao in sotto <br />places. Eccavation depths varying from a minimum of mvelve (12) feet to Gfiy(SO) fat are <br />expected. The area will be easily mined with a dozer and front end !Dada. <br />MINING MAPS: <br />Sec Exhibit C Cor four maps graphically representing the mining operation titled as follows: <br />(-J(.L__ ~jl. Pre-Mining map. --~ ~o'C~brv.k, 'nTi.c (,ji-Oz"~ , <br />2. Mining maps indicating three phases of the mining operation titled the " inning <br />Gmding Plan'. "Intermediate Grading Plan". and "Fi=a1 Grading Plan". <br />On tltc Maps the contours are drown using twenry(2(I) fcet intervals. <br />~ LA~ ~ <br />7~ <br />MINING DESCRIPTION: <br />Mining will be of the "Oprn Pit" ry•pe. Normal equipment for such operations will be used: a <br />bulldozer. a front end loader, a back hce and several dump trucks. A portable crusher and <br />scrccns will also be used. No blasting will be required or trued at the site. <br />~G ~ ,3 <br />Cs~`~ ~~ <br />t 1, ~~~„ <br />As shown on the 'Beginning Grading Plan" the "Staging" area will be striped of overburden. A <br />bulldozer and/or front end loader will be used to move and pile the topsoil in the aria labeled <br />'O+•erburdett Stockpile". II is estimated thit an average of twelve(12) inches of topsoil will be <br />removed off of [he surface. As touch top soil as is practically possible will be saved far reuse. <br />The rtwximum eslitnated volume of topsoil to be stockpiled will result in a pile approximately <br />one hundred (ll1U) fcet wide at the base, with a maximum slope of 1:5, with a height of ten (10) <br />Ceet and four Hundred fifty (050) ftt[ long. egv <bTe matter will remain with the topsoil <br />