2015-01-08_REPORT - C1996083

• Permit No: C1996083
• IBM Index Class Name: Report
• Doc Date: 1/8/2015
• From: Jason Musick
• To: Susan Burgmaier
• Annual Report Year: 2013
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: SLB
• Email Name: DIH
• Media Type: D
• Archive: No

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1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 I �� o�
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repair.
Figure 150, Site CWI- DH -58: CWI -DH -58 was noted as being
blocked with no indication of a timeline for repair.
Figure 141, Site CWI- DH -60: CWI -DH -60 was noted as being
blocked with no indication of a timeline for repair.
Figure 159, Site AW -4: Alluvial Well AW -4 was noted as
being blocked with no indication of a timeline for repair.
11. Basic Standards A
A groundwater point of compliance was not established for
(Interim Narrative C
CWQCC regulation t
the Bowie No. 2 Mine based on existing groundwater quality
Standard) for Ground 4
41.5.C.6 a
and use and a prediction in the Probable Hydrologic
Water C
Consequences section of C- 1996 -083 that mining will not
likely have a negative effect on groundwater.
All parameters were met with the exceptions of the
12. Parameters to be f
following discrepancies for the 2013 Water Year:
analyzed in ground T
Table 2 of 2013 AHR
water samples T
Table 161, Site AW -5: Manganese was not reported for
September.
Based on the information presented in the 2013 AHR the
13. Prevention of d
disturbance to the hydrologic balance within and adjacent to
material damage to the C
CDRMS regulation t
the permit area caused by mining and reclamation at the
hydrologic balance 4
4.05.1(1) B
Bowie No. 2 Mine is the minimum that can be expected from
outside the permit area a
an underground mining operation at this location. Use of
best management practices indicates minimization of
disturbance to the hydrologic balance.
Surface water— Monitoring data reported for springs and
ponds was consistent with baseline data and the predicted
14. Agreement of i
impacts identified in the PHC section on page 2.05 -115 of C-
observed hydrologic C
CDRMS regulation 1
1996 -083. Conductivity was above average at the majority
impacts with "probable 2
2.05.6(3) and o
of the sites when compared to baseline data.
hydrologic r
requirement to keep
consequences" (PHC)
current CDRMS T
The water quality reported for a majority of surface water
projected in mining
regulation 2.03.3(1) s
sites fell within the baseline ranges. Higher than average
parameters were identified both at sites affected by mining
and those not affected by mining. See Table 3 below.
Ground water — No material damage has occurred, as
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1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 I �� o�
1876 /