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~ ~ '~ <br />._ ~ <br />availability. site or access rack res needed et the Thompson <br /> 12 Mint. <br />Drop afru<turea uy he designed to •crve as ilw <br />me uurinR a vt it a ae ration devices. Yetet' collection end bypus sys[em• ve re <br />8i[umestit upha l[ coated steel rein re re constructed during [he next phase oC the [ro <br />febri aced for the PMDT ay st ems. All rater projects. This alloyed excavation end channel <br />handling devices should be corrosion resistant improvement work to Droc eed in dry conditions. <br />and vandal proof. These derites ere slso desirable for the lanq <br /> term operation and sain[enente of the PXDT <br />'Lble ] pre yenta comparative cost de [a [or the sy e[eme. The De r[i<u Lr weer col ]action end <br />design tost^ o[ [he Marshall and Thump son PIIDT diet ribu[ion systems e[ eeeh mine differed <br />sy seems. signi [icen[ly, given the unique nice conditions <br />' et each porUl. <br />Teblc 1 <br />PMDT Sye[em Design Costs• lab le 2 prow idea s tompara[ive vier of <br /> equipment, labor, and material costs for the <br />Merahe ll Thompson Mershell and Thompson PNDT ty seems. <br />•3 Mine I2 Mine <br /> Table 2 <br />ratetsh ed Analysis PMDT System Construction Costs <br />General Evaluation 387$.00 1350.00 Eouipment /Lehar Coate Mershell Thompson <br />Veeer Quality 1200.00 610.00 I3 Mine a2 Xine• <br />Ceohydro logy 210.00 120.00 <br />Surf ate Hydrology 360.00 0•• A<ce ss/Site development 870.n0 0 <br />property osmer consent 840.00 140,00 Mater Nandlin6 Facilities 400.00 1,773.00 <br />pe rmittinR 1723.00 643.00 8oR Conserve cion 3261.00 4,218.00 <br />Xining Evaluation Limestone placement/ <br />Hine Lavout 780.00 373.00 Drop structures ~ 1226.00 1,100.00 <br />Mineral Resources 750.00 210,00 Site Reclemetion 310.00 170.00 <br />Xinerel Rights 140.00 103.00 <br />Facilities Sit inR Subtotal 8227.00 17,827.00 <br />Site Planning 1030.00 360.00 <br />Channel Surveying 640.00 140.00 Mete riel toots <br />Site Mapping 280.00 0•• <br />Field Verif ieation 210.00 713.00 Peet Moee 3400.00 7,693.00 <br />Fat flit ies Design LismaCOne 776.00 494,00 <br />rater handling 1400.00 910.00 Quarried Rock 770.00 193.00 <br />ar[if is ial bog 2240.00 560.00 Asphalt coated Steel 620.00 304.00 <br />drop st rv<tures 840.00 140.00 Plastic pipe 679.00 130.00 <br />limestone tbannels 770.00 210.00 Hypolon liner/ben[onite 541.00 1J1. 33 <br />revegetatimn plan 610.00 2200.00 Filter fabric 98.00 93.00 <br /> Mists lleneous 424.00 87.00 <br />Total 114,120.00 17,790.00 <br /> Subt o[el 9]08.00 19, 7G ),00 <br />• Cost est imetes are based en hourly rates for So[el 17,573.00 117,170.00 <br />staf f~profees ional^ and design engineers. l2 <br /> •Equipmen[ and labor for ton et rvctinR the <br />•• Previously exist ing information. Thompson 12 PMDT system rare provided by the <br /> Snormus Coal Ca. The at caul smounte expended <br />pMDT Sy at em Construction Costs by the Company re re adjusted to reflect <br /> wrren[ly prevailing costs for equipment end <br />The tone[ruc[ion of the prototype P1mT systems labor in the Gene rel exceve[ing business. <br />vas a«ompliehed in four phases: (1) site <br />preparation and atcras development; (2) creation Ma shall I3 PMDT 3ve[em Performance <br />of the rater collection derive and bypass <br />systems; '(3) bog construction and dornatream The Xat shell PXOT Sy at em hoe operated fairly <br />platenen[ of limestone filled Channels and drop consistently since July, 1984. Several in- <br />e[rvttutes; (4) final site tetlemetion. Neevy to rvp[ione in service rare eeueed by vends L. <br />equipment required during the construction of As ^ result, Greet care end accent ion have been <br />both PNi1T sy ^t ems included • loader/backhoe and given to everting the reel and Dotentiel <br />• dump trvt k. A small Boger vas needed during problems of yendslism in the design of [hie <br />tons[ru<[ion o[ the Thmmpson PMDT system because ay st rn. <br />of froeen grwnd conditions. ' <br /> The overall re salts of the aperetion of this <br />Site preps ration work prior to system PMDT system have been very encouraging. The bog <br />tonetrutt ion e[ the Marshall I3 Mine involved attic iently removes iron, and She raterf ally and <br />topsoil selvage and salvage of existing plant limestone tilled channels of Ceccively neutral i~te <br />materials !or use in later reQame[ion. A mineral acid icy. Total iron concentru ions ire <br />pioneer toed ray tons[rutted a[ the Mershell i3 reduced by 99Z through the system. Consistent <br />pro ie<t area to provide acre ss co the site. Ho inereeeee in pH from 3.1 to 7.4 have Deen <br />