2013-09-10_REPORT - C1980005

• Permit No: C1980005
• IBM Index Class Name: REPORT
• Doc Date: 9/10/2013
• Doc Name: 2012 Annual Hydrology Report Review
• From: DRMS
• To: Seneca Coal Company
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

Page 3 of 5
9. Instream Numeric
CWQCC regulation 33.0
Four Seneca II monitoring sites exist within the Fish Creek
Standards
Drainage: The 008 outfall and SSB12 are on Bond Creek and
discharge into Fish Creek which is on Segment 13b of the
Yampa River basin. Sites SSF11 and SSF13 are on Fish Creek.
The stream standards for Fish Creek are based on aquatic life
standards. The total recoverable iron standard (1.0 mg /1) was
exceeded at sites SSF11 and SSF13. Nitrite standard (0.05
mg /1) was exceeded at SSF13. See above for Selenium
exceedance at NPDES8.
10. Interim Narrative
CWQCC regulation
It was determined that bed rock groundwater points of
Standard for Ground Water
41.5.C.6
compliance are unwarranted at the Seneca II mine. Well
SFAL72 serves as the Seneca II Mine's Fish Creek Alluvial
ground water point of compliance. Ambient values for this
site were higher than the Reg. 41 standards for iron and
manganese, nitrate, and sulfates. The iron standard was
exceeded with a value of 5.16 mg /1. It appears that the high
iron values observed at SFAL72 are not likely the result of
discharges at Seneca II due to the iron value levels at Alluvial
Well SBAL68.
11. Sampling frequency at
Volume 14, p. 2.04.7 -2
The report indicates that all frequencies were met.
surface water
of CDRMS mining permit
C- 1980 -005
12. Parameters to be
Volume 14, p. 2.04.7 -2
Parameters to be sampled are conductivity (umhos /cm), pH
sampled at surface water
of CDRMS mining permit
(units), temperature (C), total recoverable iron (mg /1),
sites
C- 1980 -005
dissolved manganese (mg /1), total mercury (ug /1), total
ammonia (mg /1), dissolved nitrate (mg /1), dissolved nitrite
(mg /1), dissolved selenium (ug /1), dissolved sulfate (mg /1),
total sulfide (mg /1), total suspended solids (mg /1), and total
dissolved solids (mg /1). All parameters were met.
13. Filing frequency of pond
CDRMS regulation
Pond 008 remains as the only sediment pond associated with
reports
4.05.9(17)
C- 1980 -005. Quarterly pond inspections were conducted
within the appropriate quarter.
14. Timely filing of pond
CDRMS regulation
Quarterly pond inspection reports were submitted and
reports
4.05.9(17)
received by the Division within an appropriate timeframe.
15. Content of pond reports
CDRMS regulation
All required information was addressed on quarterly
4.05.9(15)
sediment pond inspection in water year 2012.
16. Sampling frequency of
Volume 14, p. 2.04.7 -2
Ground water samples are collected from SBAL68 and SFAL72
ground water monitoring
of CDRMS mining permit
on a biannual basis.
wells
C- 1980 -005
17. Parameters to be
Volume 14, p. 2.04.7 -2
Parameters to be sampled are conductivity (umhos /cm), pH
analyzed in ground water
of CDRMS mining permit
(units), temperature (C), dissolved iron (mg /1), dissolved
samples
C- 1980 -005
floride (mg /1), dissolved manganese (mg /1), dissolved nitrate
(mg /1), dissolved nitrite (mg /1), dissolved selenium (ug /1),