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Summary of Review of Annual Hydrology Report <br />Mine: Keenesburg Mine Date of review: <br />Permit No.: C-1981-028 DRMS reviewer: <br />Report Year: 2009 <br />Submitted by: Coors Energy Company <br />Date received <br />.by Division: February 25, 2010 <br />January 12, 2011 <br />Rob Zuber <br /> Require- <br /> <br />Requirement Requirement <br />citation Mont <br />complied <br />Comment <br /> with? <br /> (yes / not <br />A. Filing frequency CDRMS <br />of hydrology regulation yes <br />report 4.05.13(4)(c) <br /> End of <br /> February <br />B. Timely filing of (page 117 of <br />hydrology report permit yes <br /> application <br /> C-81-028 <br />C. Filing frequency <br />of NPDES <br />Discharge n/a <br />Monitoring <br />Reports <br />D. Timely filing of <br />Discharge n/a <br />Monitoring <br />Reports <br /> The Keenesburg Mine does not discharge surface waters <br /> beyond its boundaries and, therefore, has not caused <br />E. NPDES discharge <br />n/a exceedances of instream numeric standards in the South <br />limitations Platte River basin. The Colorado Water Quality Control <br /> Division terminated the mine's NPDES discharge permit <br /> several years ago after finding that no surface discharges <br /> CWQCC from the site are likely. <br />F. Basic Standards regulations <br />regul regul yes <br />for Surface Water 3.1.11 <br />Instream Numeric <br />G CWQCC <br />. <br />Standards regulation yes <br /> 3.3.0 <br />H. Antidegradation CWCC <br />Rule for Surface regulations <br />3.1.9(2) and yes <br />Water 3.3.0. <br />I. Sampling <br />frequency at There have been no discharges of surface water from the <br />surface water n/a site for several years. <br />monitoring sites <br />Page 1