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2010 ANNUAL HYDROLOGY REPORT <br />Permit No. C-82-056 <br /> <br />4 2011 <br />., -wrnalion, <br />Mining and Safely <br />Submitted to: <br />L <br />Colorado Division of Minerals and Geology <br />Denver, Colorado <br />Submitted by: <br />Twentymile Coal Company <br />Oak Creek, Colorado <br />March 2010 <br />0 <br />I:\ENVIRONMENTAL\AHR\2009\TCC\TEXT\Contents2010