2013-09-10_REPORT - C2009087

• Permit No: C2009087
• IBM Index Class Name: REPORT
• Doc Date: 9/10/2013
• Doc Name: 2012 Annual Hydrology Report Review
• From: DRMS
• To: Peabody Sage Creek Mining, LLC
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

minimization of disturbance to the hydrologic balance.
No determination has been made concerning Item no. 7
mentioned above. An investigation by the CDPHE and
Peabody Sage Creek Mining as to the cause of the
elevated selenium measurements is ongoing. Should it
be determined that these exceedances are due to
impacts permitted under the current mine plan,
revisions to the PHC may need to be required.
23. Prevention of
CDRMS regulation
Surface water - No surface water impacts due to mining
material damage to the
4.05.1(1)
have occurred. Note Item No. 22 above
hydrologic balance
outside the permit area
Ground water— No material damage has occurred, as
discussed in item 20, above.
24. Agreement of
CDRMS regulation
Due to limited on the ground construction activities
observed hydrologic
2.05.6(3) and
during the 2012 water year, a determination cannot be
impacts with "probable
requirement to keep
made as to the impacts with the approved PHC. Based
hydrologic
current, CDRMS
on the current activities and observations in the 2012
consequences"
regulation 2.03.3(1)
AHR, no local or regional impacts were identified. This
projected in mining
observation is consistent with the PHC.
25. Adequacy of
CDRMS regulation
The current ground water monitoring program
ground water
4.05.13(1)
continues to adequately address the protection of the
monitoring program
hydrologic balance.
26. Adequacy of
CDRMS regulation
The current surface water monitoring program
surface water
4.05.13(2)
continues to adequately address the protection of the
monitoring program
hydrologic balance.