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r 1 <br />03/18/2009 12:29 9702475104 <br />DMG DURANGO OFFICE PAGE 07/21 <br />aLsh <br />&Mmnmen4l S.1olowmid <br />August 12, 2009 <br />M, Ross Mines <br />W"tom Fuels Colorado LLC <br />Be- 628 <br />Noel. Coleredo 81424 <br />Subject: REVISED Subsoil Suitability Study <br />New Hor nno Mine <br />Welsh Project No 7873 -010 <br />Dear Mr. Gubka <br />Walsh Environsu Wl Scientist &Engineers,I.LC(Walsh) hen perferncd a limited soil investigation <br />and inspentions of opermxns at the New Horizon Mine in Nucls, Ceh rid.. Work was 11red mend <br />under contract to Wesxm Euels— COlondo 4LC (WFC). This letter describes invemigadon <br />technique., results, slid their implicl im, to mine opetetinns and is a revision of the original mil <br />invicetigatum dined Much 20, 2008. Revisions are haled on commrnU received from The I Soil n of <br />Rrnlslnabm), Mining, and Safety (DAMS) in n later dated May 28 2008. <br />gec/tgrvsand <br />The New Merimn Mine comes coal under a DBMS permit Tmpermitdc6nes soil handling <br />procudures that have bden followed by WPC. Prinr to Pebrvary 2008, the permit did not recognize any <br />roil within f le permit boundary u being 'prima famdand" u defined in the DRMS rogulmoir s and by <br />[he National Rcaoume COnsmation Sorvioe(NRCS). Soil handling was consistent with the permit <br />end me MRCS ruling prior W permit issuance that there wont rid prime formland soil within Ne permit <br />um. (n Pebrvary 2008, rba NRCS dettrminod that some ofthe soil within the perms boundary <br />qualified a prime tnrmland, Somc of that prime F land hM beat mined and xdeime(1, some had <br />been mined but had not yet hem' fully reelsimcd, and wme of<ha material has not yet been min W, <br />WPC has chosen W t o Steps W ensure that the uorecleimwl mined ems that hoe been ralassficd <br />cha as <br />prime fe ri.1h, fig replaced with soil end subwil drat is suitable to xstme prime fatrmlond <br />macrisiics. <br />Melling Oparusfnns <br />Coal IS mined by stripping topsoil in ape m two lifts, mahanically atyyping subsoil artd westharad <br />Dakota Formation bcdWck overburden. Null remaioing bWmek overburden. and mining dal. TIW <br />fining pit is backflled firsr with the intedsuW and blortal ovuhurden f Ibwed by placement of the <br />weathered bedrock overburden, end finally Ue Soil lift(.), <br />The working midi of the mina rcvrsls 10 to 30 feet ofwoadlered sandstone and shale bedrock Nat has <br />deeompds<d and is moony fn'ahle (see photo-). This malcrid is called "Eeneh 1 "or "ovetburdon unit <br />I " material in the permit mod by WFC It grades impexcpribly into the overlying Soil, o rd contains <br />wnlov. smv m.k..rn <br />115 omml s­.. ennl luneum.emmnao alstlLZyp. Pame tale) 2.11636.pA %.. NLafta wel.Mnvwm <br />Cory- ve otlW: <br />M.A Ygr19u1 (]rtle, Sulm :as amlda. Gelnnpe fOFi -2n]5 %:one ;ba) M0.329S. PA %)WSJ LLi{:aa] <br />1 1 <br />U <br />(ReRSed Nov 2008) Attachment 2.05.4(2)(d) -1 -2 <br />