2011-07-01_INSPECTION - C1980001

• Permit No: C1980001
• IBM Index Class Name: INSPECTION
• Doc Date: 7/1/2011
• Doc Name: OSM Inspection Report
• From: OSM
• To: DRMS
• Inspection Date: 6/21/2011
• Email Name: JHB
• Media Type: D
• Archive: No

Edna Follow -Up Bond Release Inspection (SL -11)
Colorado Division of Reclamation, Mining and Safety (DRMS) Permit ID # C- 1980 -001
Tuesday, June 21 2011 9:00 — 1:00
Participants:
Janet Binns, DRMS
Jim Tarzoff, Chevron Mining Inc
Troy Summers, WCC Engineering
Lori Jazwick, NRCS
Lou Dequene, Routt County Conservation District
Chris Keogh, Habitat Management
John and Terri Redd, Landowner
Tom Maneotis, Landowner
Bill Doolen, Landowner
Roy Rosell representing Andy Hunter, Landowner
Scott Hayden, Landowner Interests / Cherry Creek Properties
Christine Belka, OSMRE (Badge #182)
Weather conditions: warm (60's /70's), breezy, mostly sunny, dry
The purpose of this follow -up bond release inspection was to assess weed management and
reclamation success at the Edna mine. SL -11 represents Phase III bond release / Termination of
Jurisdiction and has been postponed due to noxious weed invasion. The original bond release
inspection was conducted on July 20, 2009 and a follow -up inspection was conducted on August
24, 2009. Another follow -up inspection was scheduled for fall of 2010 but was postponed due to
snow cover and landowner request.
Whitetop, Canadian and musk thistle, perennial pepperweed, and houndstongue have previously
been observed in relatively higher quantities than permissible under bond release requirements.
Chevron contracted Habitat Management to spray herbicides within the permit area. Weeds have
been sprayed in the two main bond release areas (Moffat and West Ridge) in the fall of 2009 and
spring / fall of 2010. The Moffat area was sprayed for whitetop approximately a week ago;
additional herbicides are scheduled to be applied to houndstongue and thistle in the coming
weeks. Staggered application is conducted so that the herbicide is applied at the appropriate
growth stage for each species. This ensures optimal uptake and efficacy of the chemicals.
Generally Tordon and 2 -4 -d are used on houndstongue and thistle, while Escort is used on
whitetop. Milestone has also been used on this site with a relatively impressive level of success.
The inspection began with Ms. Binns providing a brief overview of bond release procedures and
requirements. The maximum permissible relative cover of 3% weeds was explained as well as
the regulatory program's inability to require complete eradication of all weed species. The
vegetative cover may be comprised of up to 3% weed species on the bond release area, however,
areas that constitute infestations may not be approved for bond release.
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