2014-05-19_REPORT - C1982057

• Permit No: C1982057
• IBM Index Class Name: Report
• Doc Date: 5/19/2014
• Doc Name: Annual Hydrology Report Review Memo
• From: Jason Musick
• To: Janet Binns
• Annual Report Year: 2013
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

Page 4 of 5
19. Restoration of ground
CDRMS regulation
For the 2013 water year, water levels at all wells fell within
water recharge to
4.05.12(3)
their historic ranges, with the following exceptions: Wolf
approximate pre- mining rate
Creek Coal Well WWC17 recorded the highest water level on
record during the spring. Wolf Creek Overburden well
WWCOV25 and Wadge Coal Well WW25 displayed the lowest
water level on record. All alluvial wells displayed seasonal
water level fluctuations in response to periods of
precipitation recharge.
20. Prevention of adverse
CDRMS regulation
Compliance with the Basic Standards for ground water, as in
impacts to ground water
4.05.11(1)
item 10, indicates the permittee is preventing adverse
systems outside permit area
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 exceptions identified in item 19. 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 impacts to
CDRMS regulation
No material damage has occurred, as discussed in item 20,
ground water that adversely
4.05.11(2)
above.
impact post- mining land use
22. Minimize disturbance to
CDRMS regulation
The disturbance to the hydrologic balance within and
hydrologic balance within
4.05.1(1)
adjacent to the permit area caused by mining and
and adjacent to the permit
reclamation at the Seneca II -W Mine is the minimum that can
area
be expected from a reclaimed surface mine at this location.
Use of best management practices indicates minimization of
disturbance to the hydrologic balance.
23. Prevention of material
CDRMS regulation
Surface water— Predicted TDS values were exceeded at one
damage to the hydrologic
4.05.1(1)
of the three sites. A prediction was made as to the increase
balance outside the permit
in TDS would be observed at various stream sites during the
area
irrigation season (June- September). Average TDS at all three
sites was lower than predicted for the 2013 water year.
Ground water— In Tab 17 of the PAP, predictions were made
as to the expected TDS increases to be observed at various
monitoring wells. Predicted TDS values were exceeded at
two of the seven sites. No material damage has occurred, as
discussed in item 20, above. Agricultural ground water
standards were exceeded at six monitoring wells. Baseline
information shows that several parameter concentrations in
excess of both irrigation and livestock standards.
24. Agreement of observed
CDRMS regulation