2012-12-24_REPORT - C2009087

• Permit No: C2009087
• IBM Index Class Name: Report
• Doc Date: 12/24/2012
• Doc Name: 2011 Annual Hydrology Report Review
• From: DRMS
• To: Dennis Jones - Peabody Sage Creek Mining, LLC
• Annual Report Year: 2011
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

18. Basic Standards for
CWQCC regulations
The PSCM did not generate significant amount of
Ground Water
41.4 and 41.5
leachates in 2010. Six groundwater wells exceeded the
manganese standard (0.2 mg /1) in 2011. As mentioned
in the above item number 8 above, in soils with a high
pH a standard of 10 mg /I would be more appropriate
than the 0.2 mg /1. In 2011 no PSCM wells displayed a
value higher than 5.0 mg /1. Three wells exceeded the
fluoride standard (2.0 mg /1). The iron standard was
exceeded at alluvial well 71. Spoil well 27 exceeded the
selenium standard of 20 ug /I with a value of 39.9 ug /1. It
is noted that the POC well was less than the standard.
19. Restoration of
CDRMS regulation
ground recharge to
4.05.12(3)
approximate pre- mining
rate
20. Prevention of
CDRMS regulation
Compliance with the Basic Standards for ground water,
adverse impacts to
4.05.11(1)
as in item 10, indicates the permittee is preventing
ground water systems
adverse impacts to ground water quality outside the
outside permit area
permit area. Monitoring data indicate the permittee is
preventing impacts to water quantity outside the permit
area. Hydrology reports indicate that a water level at all
wells fell within their historic ranges, with the exception
of SWU8P1, SGAL70, SWU6, SSP61, and CW2701.
Overburden wells COV2633 and wadge coal wells
CW2632 and CW2701displayed the lowest water level
on record. However, monitoring of these wells began in
2008; so long term data is not available. All alluvial wells
showed seasonal water level fluctuations in response to
periods of precipitation or lack thereof. Spoil well water
levels indicate that down slope highwall portions of the
spoil exhibit significant amounts of saturation.
21. Prevention of
CDRMS regulation
Underground development at the PSCM began during
impacts to ground
4.05.11(2)
the 2011 water year. Due to the premature mining
water that adversely
process, prevention of impacts to groundwater cannot
impact post- mining land
be determined as of the date of this review.
use
22. Minimize
CDRMS regulation
The disturbance to the hydrologic balance within and
disturbance to
4.05.1(1)
adjacent to the permit area caused by mining and
hydrologic balance
reclamation at the PSCM is the minimum that can be
within and adjacent to
expected from a reclaimed surface mine at this location.
the permit area
Use of best management practices indicates
minimization of disturbance to the hydrologic balance.