Laserfiche WebLink
Lumngs will be placed in a 200 x 100 <br />within the shaf} pad adjacent to the shaft por <br />with a no x 10 foot lined tem <br />minat 30-mil AVC flexible m excavation az3' mine develo <br />embrane liner ~ ~ shown on Map 1 W Pment waste it ex <br />The cuttin havin The cu P cavate <br />cuttin s g head is rotated from the s g a Permeability of~10''Z crn/nsec.Pit will be line <br />g from the sha$ bottom to urface by the drill <br />drilling assembly in the the surface collection ply' which also serv <br />Pipe strai hole and is tensioned plt. The drill ~ as a conduit to <br />ght• The cutting head moves the w tO ad3ttst the cutting wei PIPe also serves ~allsfer <br />Periphery of the head. This w ater fro Sht on the head to suspend the <br />pick-up pipe in the ater then flows In near the center of the and to ke <br />down the ce center °f the head. dOµ'n ~'°und the cutters hid ~d dischar ~ ~e drill <br />across the shat{ bottom andl p~pe' ROC The drill Plpe's a alld washes the c ges it at the <br />cuttin s Pward flOµ' is activated b uttings towards the <br />cuttings are separated or settledthe drill g are moved by the circulation Y compressed <br />for re-use. Pipe to the surface collection it, of thew air injected <br />out and the water is allow P Wit ater down the hole, <br />ed to drain back htn the collection <br />The cuttings volume or is pit, flte rock <br />completion of the shaft 111 be a pumped back into the hole <br />pproxlmately 7,650 Cy <br />will be hauled ex°avation and steel liner • (2,475 CY wh <br />materi tO the old pit to fhe south °f Installation ~ swelled b <br />als well then be cover ,the cuttin Y 50 Percent). Upon <br />and reve ed with TCC s overland covve gs Pit will be dewatered. <br />develo getated with a temp°r~, coV~ usly placed fromyOr The collection pit and o t n <br />Pment waste A si materials the shaft collar e g <br />shaft drrin Plt. The cuttin gn(s) will be xcavation <br />desi , <br />g eventual reclamation of the aoihtyft collar excavation materials Swnilllbg the t graded <br />Once the cutter head reaches the co utilized o°r~ mine <br />leg derrick. Using the s al se fill the <br />ame A-le ~' tt1e cutter head will be <br />diameter using a hydrostatic steel gn ~mck, the excavated disassembled and r <br />and field welded in 40' ' The steel liners wild be w' emoved from <br />steel bulkh Joints. Tl1e Liner Ill then be lined to a the A- <br />ead to the bottom ' µ'i11 be Pre-fabricat nominal 6' inside <br />lowered into ,Joint floated into ~ off site, hauled to the site <br />place. ]3y calculatin and leaving the excavated holee Th7s Is accom <br />as needed, the liner is Basil g ft1e exact buo pushed b <br />P'°ut seal wii] be y and safely lowered into cy of the Iiner X11 °f water while the lin~ecuring a <br />Pumped between the strata and liner~slhon' ~ and adding water to the inside die being <br />Once the liner is in place, a nominal 9" <br />The grouted steel liner to hold it in meter <br />noted above will serve to isolate the T Place. thick <br />shaft. , it is planned to res <br />This will further assure tha re grout the Twen tymile Sandstone from <br />down on the inside of the sha tYlllile Sandstone to t11e Wadge pVel'burden As <br />der final closure the water in this Prevent seepage fi.°m . <br />concrge e mgt from the site, ~e Poliowing completion of shaft borin nfined and <br />pads, 10 x 10 emer8enc h unit will be co tt into the <br />caissons x 3 foot and 18 x 14 x 1 •oist and hoist equi m g and casing operations and r of seep <br />as shown by the foundation S foot P Brit will be emoval <br />enclose the surface collar and desi , anchored b erected on two <br />and access road gu drawing in E Y 4- to 12-inch diameter Separate <br />wig be cle emergency hoist installarion.~lbit 49C, A fence s ' 1S-foot concrete <br />aped-up and surface areas Following co (}µ'i11 be constructed to <br />In order to graded and dr mmissioning, the shaft <br />sha$ and lulmmtzepotential essed. Pad site <br />emergenc environmental and aesthetic im <br />gradient div Y h°ist installation <br />ersion ditches, ~,O 2 ,surface draina a pacts associated with <br />logs ~"°und the lower Odown-gradient d g at the shaft site will be h e 18-Right ventilation <br />control blankets over P°I`G°n of the to coinage ditches the andled by two P <br />filter, and seeded cut Psoil stockpile, the use of 20-inch (2) u <br />gravel surfacing underand fill slopes, the combination of a ro~k x sin le dl~et~ sediment <br />topsoil stockpiles will be ~ {Refer to filterg net (Curlex I} erosion <br />piles, silt f addressed by u sIo Exhibit 8T for SAE (2-ft rock berm <br />drainage meets the dwattles at the pe Oe o fersion ditches to detail). Drainage fro }and grass <br />gned road di oh slo route m the other. <br />es• The Ii the piles, and rock chi gradient runon al-ound the <br />mired road drainage will be handlded bs µ'h <br />MROS-200 Y a desi Ste upslope <br />gned road <br />2.OS - 45.6 <br />09/08/05 <br />