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?? 61 1 Skyline Road - Laramie, WY 82070 - (307) 742-0031 <br />V V V VCENGINEERING FAX (307) 721-2913 - E-mail: infolar@wwcengineering.com <br />September 15, 2009 rJVED <br />State of Colorado SEP 1 poo9 <br />Office of the State Engineer Divislon or Kec18mati0n, <br />821 Centennial Building Mining and Safety <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />RE: Edna Mine PN C-80-001; Well Abandonment Reports <br />Office of the State Engineer: <br />Chevron Mining Inc. (Chevron) has contracted WWC Engineering (WWC) to assist in attaining bond <br />release for the former Edna Mine, Permit Number C-80-001, located in Routt County, Colorado. The <br />Edna Mine is in permanent cessation, reclamation is nearly complete, and the site is approaching <br />potential final bond release. Prior to and during mining activities numerous monitoring wells were <br />drilled within and extending outside of the permit boundary. The monitoring wells are constructed of <br />steel/PVC casing ranging in diameter from 1"-7" and depth from tens to hundreds of feet. The <br />construction of the monitoring wells was for observation not production. The monitoring wells had <br />numerous purposes including attaining water level and/or water quality data. The referred monitoring <br />wells have since been removed from the Edna Mine groundwater monitoring program. <br />Four (4) monitoring wells were plugged and abandoned in accordance with state regulations. The <br />monitoring wells were located in T 4 & 5 N, R 86 W, Routt County, Colorado. The monitoring wells <br />were plugged and abandoned in September of 2009. The monitoring wells were sealed with bentonite <br />plug. The well casings were removed a minimum of 3 feet below ground surface and backfilled with <br />native soil. A stamped aluminum cap was placed at each former monitoring well site for future <br />identification. <br />Should the Colorado Office of the State Engineer have any comments or concerns regarding this <br />submittal, please contact me at your convenience. <br />Sincerely, <br />oaf' <br />y-Silmm rs <br />Project Manager <br />TNS <br />Enclosures <br />File: 99-144 <br />cc: Leach (Chevron), Musick (CDRMS), Weinman (Permit), Dulan, Hunter, Redd