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11/10/2005 14:24 9709295595 WEST ELK rynv 10 ZO05 I4710 PHOtiiH RfiryGER DISTRICT PAGE 03 870 527 4151 p.2 SVPYLEMENTAL II~iFORMATXON RE;~RT Coal Metlrsne Drainage Project Panels 16.24 Motmtain Coal Company, West IV>>< Mine November 10, 2005 Minor Revision 326 I1VT1tODUCTION AND BACKGOUND. This Supplemental Information Report [SIR) was preparod to evaluate any ahaaged conditions in a project axes previously approved for methane dtniaage activities. Depending oft the eigaifioattce of the changed conditions a detocmination is made whether the current emrironmental analysis is suttloietri or if additional analysis ie needed. tJn November 10, 2005, Mountain Coal Company (MCC) submitted a ptnpesal to aonattuet a 1.0 acrd drill pad end drill 2 holes on flue GMUC+National Forest, Paonia Ratrper District (sue attachod map). The purpose of and need for drilling m is to help asonitar sad mitigate ttndergrottnd conditions associated with a thermal event within uadsrgtvtmd portions of the West Elk Mice. The proposed drill site lies on coal lease COC-56447, sad is located in Township 13 S, Range 90 west, 6`a principal raeridiaa, in Section 26 in Citmniaon County, Colorado. Tho area proposed for drilling is located approximately 600' south of methane drainage wall 2¢01102103 oa West Flatiron. The ' target is 24 headgate Dross-cute 37 & 3 S, entry 2. The surface is National Forest System lands admiaiatered by rho Gtaad Mesa, Uaeompahgc, and c~uaaiaon National >; orest, Paoaia Ranger District. The leads ctmeatly.proposed for a well pad and drilling lie within the project aces. that was previously a~aalyzed is the Coat Methane Drainage Project, Parfet 16-2d xnviroameatel Assessment (1"sA), Decision Notice (DI+i) and FYading of No 5igaifleant Impact (F0~1SI), May 31, 2002. 'I'ha proposal to drill ooneiata of up to 2 drill holes.ftom ono (1) new well pad (a maximtun 1.0 acres, see map). Access the proposed pad~site would be threup~t existing made. Drill holes world be approximately T' diameter and about 2500' deep. Upa~n well completion, the wells will bo initially used to facilitate monitoring/asaapling in order to determine underground coeditions associated with an uadesgmund thtsznal event. Saba equently water, roam, and/or nitrogen rt-ay be pumped through the drill hole(s) into the mine worltiags. 'l hie 8]R will present arty changed circumstances since the 2002 surface ueo approvals, but does sot change the conditions prescribed far protection ofltoa•miaerat interests applicable to loose CaC 56447.