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Mountabt Coul Company <br />w.u ax twn. <br />Po.t OMw nmt 697 <br />aoinonot, Cdorodo •14x4 <br />T.IeWwno a07 929-6015 <br />Fox i0a a29.66e6 <br />Novembor 10, 1993 <br />Ms, Christine E. Johnston <br />Cokrado Division of Minerals and Geology <br />O&ce of Mined Iand Rahrmadon <br />1313 Sherman St, Room 213 <br />Deaver, Cfl 80T03 <br />Re: West IBUt Mlae, Permit C~Dd07. <br />TR 66. BeNae PUe Slump Repair <br />Dent Chtirtine: <br />Ill llllllllllllllll <br />pbaf. r <br />If aandlsvr~rtemi~lm <br />~L~v,,,. °""o>~t ..rte <br />Et-elosed for your files L the affidavit of pubtiatioa far the tahnical revision No. 66 public soda. Tn addidoa <br />Mouutaia Coal Company OKCC) has reviewed your and Jim Pendletoa's adequery earrarna per your lever of <br />November Ol, 1993. Map 34 has ban revised to include the french drla and new ditch DZR-2 sad berm D2R-2 <br />kcWoos. Instead of trvlslag the existing Figure 2.0, "Rtxonflgured Pile Contour' In 8xhibit ! 1(Pigure 1.0 is not <br />appropriate to revise), please add the "Propaed LanddlQe Remedialion" drawing es Figwe 2.OA in tide Exhibit. <br />MCC ogees that tnoaitoting the stability of the gob ffi buttrds is appropriate and propores to itunil wrvey <br />nromtmean (similar m those on the meth 9a of the relirse pile) at appropr(ate intervab from the base es the 81l <br />fen is oompktod. Monttoring of these toonuarmts wr71 be oonduded quanerly, alaog with the Borth tsa <br />monuments. <br />MCC don not propose to install a p(amtneter at mis loador4 es we believe that the subiL'd srwey program L <br />swffictienr m tmtdtor the srroxw of the repalc To rdterate from the revldon request. this Installation is a shallow <br />gravel pack french drin (mt m utrderdrain) to aecutatdate and divert the surflclal spring flows et dta slump area <br />m the ditch blow. Survey monitoring dtua from the spring site and the haul road loeaoed above have ehotvn that <br />the dump area b shallow in tratttrq not dap~eested, so that the thaUow drain V appropriate. 'fhe gob fill over the <br />drain is to buttress the slump area. Logiplly, if the spring or soap Lows in the slump era eondnue, they will <br />follow the path of kaet resistaoca through the wide shallow dtda A t~~ Pest Pieaometet m$y in feet act u e <br />wnduit for flows to the aoLs blow the drain and cm thrwgh the gob Ia which It is completed. MCC therdoro <br />believes that a plazorrreter may furthw oompUcrta this simpia drain iustWadon and does not propose to wmpkte <br />arrclt monitoring. <br />Please don't bdtate to contact tae shoaW you have f9nlw grresdoos. <br />5inardy, <br />Kathleen G. Wdt <br />Etrvlronatental Supervisor <br />KdW/mar <br />