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eotter <br />Via Email and U.S. Mail <br />P une 9, 2011 <br />Colorado Department of Public Health and Environment <br />.Water Quality Control Division / WQCD -B2 -CAS <br />Compliance Assurance Section <br />Attention: Michael Harris <br />4300 Cherry Creek Drive South <br />Denver, CO 80246 -1530 <br />Subject: Monitoring Data f r the Schwartzwalder Mine Site and Ralston Creek <br />References: CDPS Permit CO- 0001244 <br />Dear Mr. Harris: <br />With respect to the Schwartzwalder Mine site, enclosed please find monthly surface water <br />quality monitoring results and daily mine water level measurements for the month of April, v <br />20 ®This submittal represents continuation of routine monthly reporting of water monitoring <br />results as previously discussed with you and with the Division of Reclamation, Mining and <br />Safety. <br />If you have any questions, please contact me at 719 -275 -7413 (ext. 202). <br />Sincerely, <br />John S. Hamrick <br />Vice President, Mill Operations <br />• <br />cc: David Bird (DRMS) <br />Edgar Ethington (CDPHE) <br />Daniel Arnold, Esq. (Denver Water) <br />Cotter Corporation <br />Canon City Mill, P.O. Box 1750, Canon City, CO 81215.1750 USA <br />M- /t77 - <br />Telephone (719) 275 -7413 <br />Fax (719) 275 -1669 <br />