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~~~YY VVCENGINEERING <br />61 I Skyline Road - Laramie, WY 82070 - (307) 7~2-0031 <br />FAX (307) 71t-1913 - E-mail: MtolarQww<engineering.com <br /> RE~ENED <br />April 17, 2007 <br />200 <br /> ,., <br />ppR ~ g <br />U~. ~, <br />la~ <br /> zc <br />id Sam <br />pivi <br />~n <br />Mr. Byron Walker ~ <br />ttg a <br />- <br />Colorado Division of Reclamation, Mining & Safety <br />1313 Sherman St., Room 215 <br />Denver, CO 80203-2273 <br />RE: Edna Mine First Quarter 2007 Impoundment Inspection Report <br />Dear Mr. Walker: <br />This letter constitutes the First Quarter 2007 Impoundment Inspection Report for the Edna Mine <br />(C-80-001). The Impoundment Location Map (Attachment A) details the location of each <br />impoundment inspected. Quarterly Pond Inspection Reports (Attachment B) document water level, <br />sediment level, outflow, and required maintenance cited per inspection. <br />The inspections were performed on Febmary 5, 2007 by field inspector Chris Miller. The site was <br />covered with one foot of snow and all structures were functioning as designed at inspection. <br />Maintenance on the West Ridge Pond (NPDES 002) described in previous 2006 Impoundment <br />Inspection Reports was completed in the Fourth Quarter of 2006. Minor maintenance of Culverts <br />El and E12 and Terrace T10 will be done in 2007 after the snow melts. There is currently no <br />maintenance scheduled. Should you have any questions regarding this material, please contact me <br />at your convenience. <br />Sincerely, <br />~~~ <br />Beth Heesen, P.G. <br />Project Manager <br />TNS <br />Attachments (A & B) <br />File: 99-144 <br />ec: Steve Leach <br />Edna Mine Permit <br />