2016-08-25_REPORT - C2009087

• Permit No: C2009087
• IBM Index Class Name: REPORT
• Doc Date: 8/25/2016
• From: DRMS
• To: Peabody Sage Creek Mining, LLC
• Annual Report Year: 2015
• Permit Index Doc Type: Hydrology Report
• Email Name: JLE
• Email Name: DIH
• Media Type: D
• Archive: No

Peabody Sage Creek Mining, LLC
Page 12
8/25/2016
exceedances of the basic standards for ground water are
discussed in section #18 of this review. Water levels at
all wells are within their historic ranges with the one
exception discussed in section # 19 of this review. The
mine is currently idle.
No determination has been made concerning Item no. 7
mentioned above regarding elevated Selenium levels. 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 - Note Item No. 22 above
material damage to the
4.05.1(1)
hydrologic balance
Ground water — Note item 20, above.
outside the permit area
24. Agreement of
CDRMS regulation
The mine was idle during the 2015 water year.
observed hydrologic
2.05.6(3) and
impacts with "probable
requirement to keep
hydrologic
current, CDRMS
consequences" projected
regulation 2.03.3(1)
in mining
25. Adequacy of
CDRMS regulation
The current ground water monitoring program continues
ground water
4.05.13(1)
to adequately address the protection of the hydrologic
monitoring program
balance.
26. Adequacy of
CDRMS regulation
The current surface water monitoring program continues
surface water
4.05.13(2)
to adequately address the protection of the hydrologic
monitoring program
balance.