2008-08-08_GENERAL DOCUMENTS - C1980001

• Permit No: C1980001
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 8/8/2008
• Doc Name: Well Abandonment Reports
• From: WWC Engineering
• To: DRMS
• Permit Index Doc Type: Exploration
• Email Name: JDM
• Media Type: D
• Archive: No

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VvwCENGINEERING 61 1 Skyline Road - Laramie, WY 82070 - [phone]
FAX [phone] - E-mail: [e-mail]
August 6, 2008
State of Colorado RECEIVED
Office of the State Engineer
821 Centennial Building AUG 0 8 2008
1313 Sherman Street
n of Reclamation,
i
Denver, Colorado 80203 o
Divis
M+nin9 and Sa"
RE: Edna Mine PN C-80-001; Well Abandonment Reports
Office of the State Engineer:
Chevron Mining Inc. (Chevron) has contracted WWC Engineering (WWC) to assist in attaining bond release
for the former Edna Mine, Permit Number C-80-001, located in Routt County, Colorado. The Edna Mine is in
permanent cessation, reclamation is nearly complete, and the site is approaching potential final bond release.
Prior to and during mining activities numerous monitoring wells were drilled within and extending outside of
the permit boundary. The monitoring wells are constructed of steel/PVC casing ranging in diameter from 1"-7"
and depth from tens to hundreds of feet. The construction of the monitoring wells was for observation not
production. The monitoring wells had numerous purposes including attaining water level and/or water quality
data. The referred monitoring wells have since been removed from the Edna Mine groundwater monitoring
program.
Twenty-three (23) monitoring wells were plugged and abandoned in accordance with state regulations. The
monitoring wells were located in T 4 & 5 N, R 85 & 86 W, Routt County, Colorado. The monitoring wells
were plugged and abandoned in June/July of 2008. The monitoring wells were sealed with bentonite plug. The
well casings were removed a minimum of 2 feet below ground surface and backfilled with native soil. A
stamped aluminum cap was placed at each former monitoring well site for future identification.
Should the Colorado Office of the State Engineer have any comments or concerns regarding this submittal,
please contact me or Troy Summers at your convenience.
Sincerely,
Beth Heesen, P.G.
Project Manager
TNS
Enclosures
File: 99-144
cc: Leach (Chevron), Musick (CDRMS), Weinman (Permit), Maiolo (BLM), Dick, Dulan, Gamradt,
Hunter, Redd