2012-12-19_REPORT - C1980005

• Permit No: C1980005
• IBM Index Class Name: Report
• Doc Date: 12/19/2012
• Doc Name: 2011 AHR Review
• From: DRMS
• To: Dennis Jones, Seneca Coal Company, LLC
• Annual Report Year: 2011
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

Page 5 of 6
a high pH a standard of 10 mg /I
would be more appropriate than
the .2 mg /I. In 2011 neither of the
Seneca II wells displayed a value
higher than 3.5 mg /I. The TDS
trend at well SBAL68 is stable and
do to the recent addition of well
SFAL72 to the monitoring
program, a trend cannot be
determined at this time.
19. Restoration of
CDRMS regulation
YES
ground recharge to
4.05.12(3)
approximate pre- mining
rate
20. Prevention of
CDRMS regulation
YES
Compliance with the Basic
adverse impacts to
4.05.11(1)
Standards for ground water, as in
ground water systems
item 10, indicates the permittee is
outside permit area
preventing adverse impacts to
ground water quality outside the
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 well SFAL72. SFAL72
is new to the monitoring program
so long term data is not available.
All alluvial wells showed seasonal
water level fluctuations in
response to periods of
precipitation or lack thereof.
Overburden and coal well water
levels are fluctuating in response
to the precipitation recharge and
ground water flow from the
reclaimed mine pits.
21. Prevention of
CDRMS regulation
YES
impacts to ground
4.05.11(2)
water that adversely
impact post- mining land
use
22. Minimize
CDRMS regulation
YES
The disturbance to the hydrologic
disturbance to
4.05.1(1)
balance within and adjacent to the
hydrologic balance
permit area caused by mining and