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~~~ V V V VC ENGINEERING <br />61 I Skyline Road - Laramie, WY 82070 - (307) 742-0031 <br />FAX (307) 721-2913 - E-mail: intolar@wwcengineering.com <br />September 14, 2006 <br />SEP ,L 1 2006 <br />Mr. Byron Walker Diviswn of Recamation, <br />Colorado Division of Reclamation, Mining & Safety Mining and Safety . <br />1313 Sherman St., Room 215 <br />Denver, CO 80203-2273 <br />RE: Edna Mine Third Quarter 2006 Impoundment Inspection Report <br />Dear Mr. Walker: <br />This letter constitutes the Third Quarter 2006 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 September 5, 2006 by field inspector Troy Summers. All <br />structures were functioning as designed at inspection. A failure on the east bank of West Ridge <br />Pond (NPDES 002), noted in the Second Quarter 2006 Impoundment Inspection, still remains <br />unrepaired. Although the function of West Ridge Pond is considered adequate, it will require <br />maintenance to restore the structures original design. Culverts E1 and E12 and Terrace TIO also <br />require minor maintenance. Repairs have been noted on the appropriate Quarterly Pond Inspection <br />Report and the 2006 Maintenance List (Attachment C). Maintenance has been scheduled during <br />the 2006 maintenance season. Should you have any questions regarding this material, please <br />contact me at your convenience. <br />Sincerely, <br />~ a~~~ <br />Beth Heesen, P.G. <br />Project Manager <br />TNS ' <br />Attachments (A,B & C) <br />File: 99-144 <br />cc: Steve Leach <br />Edna Mine Permit <br />