2014-05-30_REPORT - C1994082

• Permit No: C1994082
• IBM Index Class Name: Report
• Doc Date: 5/30/2014
• From: DRMS
• To: Seneca Coal Company
• Annual Report Year: 2013
• Permit Index Doc Type: Hydrology Report
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

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area
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 5
of the 7 sites with the peak values occurring in 2011.
Although the 5 sites exceeded the TDS prediction, the alluvial
wells did not exceed the TDS Point of Compliance standard
for Sage Creek alluvium or Grassy Creek Alluvium. No
material damage has occurred, as discussed in item 20,
above.
24. Agreement of observed
CDRMS regulation
hydrologic impacts with
2.05.6(3) and
No local or regional impacts were identified in the AHR. This
"probable hydrologic
requirement to keep
observation is consistent with the PHC.
consequences" projected in
current, CDRMS
mining
regulation 2.03.3(1)
It is noted that the excedences of the CDPHE selenium
standard may need to be included in a revised PHC section of
the permit. A determination should be made based on the
NPDES Compliance Schedule to meet the selenium limit by
December 31, 2015 associated with the NPDES permit.
25. Adequacy of ground
CDRMS regulation
The current ground water monitoring program continues to
water monitoring program
4.05.13(1)
adequately address the protection of the hydrologic balance.
26. Adequacy of surface
CDRMS regulation
The current surface water monitoring program continues to
water monitoring program
4.05.13(2)
adequately address the protection of the hydrologic balance.