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West Elk Mine <br />P.O. Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970)929.2200 <br />Fax (970) 929-5050 <br />January 15, 2011 <br />Ms. Kelly Morgan <br />Colorado Department of Public Health <br />& Environment <br />Water-Quality Control Division <br />_ WQCD-P-B2 <br />4300 Cherry Creek Drive South <br />Denver, Colorado 80246-1530 <br />JAN r 82011 <br />Av,fsjon Or H <br />,t?ct a44. <br />ZZ11% <br />4^4 yyFO <br />Re: Mountain Coal Company, LLC, West Elk Mine, CDPS Permit No. CO-0038776 <br />Discharge Monitoring Report for the 0' Quarter, 2010. <br />Dear Ms. Morgan: ............ ........................ <br />............................................ <br />My review found the above-referenced report(s) in compliance <br />with the following DRMS Regulations: <br />Attached please find the Dische: of C0? <br />4.05.13(2)(a)(iii) - Timely submittal of DMRs to CDRMS. <br />LLC (MCC) West Elk Mine foi; ?0 <br />4.05.13(2)(a)(ii) -Timely reporting to CDRMS of any <br />exceedances of primary limits <br />exceedances of effluent limitations. 1876 * ' 1 <br />-018 and 019. However, a serif: <br />: 4.05.1(3) - Compliance with Federal and State water <br />of December created a need to : quality laws that pertain to discharges <br />Of surface water. is <br />in an exceedance of the primal : C O L Oi R A DoO <br />REC soH r <br />RECLAMATION <br />per Part 1.A.1 .b of the permit', / fq,? MWING <br />required by Part 1.A.2 of the F: Tom Kaldenbach A sn EE TY <br />Environmental Protection Specialist Date: <br />1. Discharge from Outfa i pRMS_ I_ maaina o <br />Permit: C ?! pD d b 7 :felt <br />event. Best available ; Class: Hydrology <br />and precipitation wa 'Type: DMRs Q q : 24- <br />Name: Adequacy Memo <br />hour rain event beg II From: DMG <br />015 occurred on Ded : To. Operator <br />precipitation event. •"""""""••••: <br />2. The combination of rain and snowmelt exceeded the capacity of the pond. Therefore, <br />?- sufficient treatment of stormwater run-off by retention and settling could not occur. <br />-'^ 3. MCC's on-site rain gage data is attached; however, the December data set has been <br />invalidated because the heating coils had apparently malfunctioned and were not <br />removing ice and snow accumulations from the rain gage bucket. As such, the rain gage <br />was at times underreporting rain or not reporting at all. Nearby certified precipitation <br />data from Gunnison and Rifle show near constant precipitation during the same two week