2011-02-18_REVISION - M2000158

• Permit No: M2000158
• IBM Index Class Name: REVISION
• Doc Date: 2/18/2011
• Doc Name: Adequacy Review Response for #4-email
• From: Civil Resources, LLC.
• To: DRMS
• Type & Sequence: AM2
• Email Name: JLE
• Media Type: D
• Archive: No

CIVIL IRES7URCES,LLC
LNGINLLRS & PL\NNLRS
February 18, 2011
Mr. Jared Ebert
Environmental Protection Specialist
Division of Reclamation, Mining and Safety
1313 Sherman Street, Room 215
Denver, Colorado 80203
RE: S & H Mine; DRMS File No. M-2000.158; Amendment 02, Adequacy Review #4
Dear Mr. Ebert,
Following is our response to your adequacy review letter dated February 14, 2011.
6.4.5 EXHIBIT E - Reclamation Plan
1) Please identify the purpose of the buried riprap dikes depicted in the Permanent Erosion Control Plan?
The buried riprap dikes are proposed to prevent overbank erosion and also protect the reclaimed Site
from large shifts in the river that can occur during large storm events.
2) The Division approves of the proposed weed control plan for the site. During the site visit on February
3, 2011 is appears a significant effort to treat noxious weeds occurred. The Applicant may want to
consider conducting a temporary grass seeding in these treated areas to promote non-noxious weed
establishment. If the site will be inactive for four or five years, without competitive vegetation the
noxious weeds will return with added vigor enhancing the cost and time to treat the infestations.
Thank you for approving the weed control plan. We agree that temporary seeding is justified should the
Site remain inactive for longer than one growing season.
6.4.7 EXHIBIT G -Water Information
3) Please indicate how frequently and for what duration baseline groundwater data will be collected. At a
minimum, the Division will require monthly monitoring for 12 months. Please commit to submitting
baseline groundwater monitoring data to the Division prior to installing the slurry walls. Also, please
commit to identifying what groundwater elevation(s) will be the benchmark for the two foot trigger point
outlined in the response fetter.
Monthly groundwater level data will be collected for a minimum of twelve (12) months and baselines
including the 2-foot rise trigger established prior to the construction of the slurry walls.
4) Please commit to notifying the Division within 24 hours of when a trigger point for mitigation has been
observed.
The Division will be notified within 24-hours of a trigger point being observed.
5) Two issues from the Division's Third Adequacy review were not addressed in your response. They are
listed here, please address:
323 FIFTH STREET • P.O. Box 6S0 I FREDERICK, CO 80530 • PHONE (303) B33-1 41 6 • FAX [phone]