2016-08-04_REPORT - C1981038

• Permit No: C1981038
• IBM Index Class Name: Report
• Doc Date: 8/4/2016
• Doc Name: Subsidence Monitoring Report
• From: DRMS
• To: Bowie Resources, LLC
• Annual Report Year: 2015
• Permit Index Doc Type: Subsidence Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

Bowie Resources, LLC
Page 4
04 August 2016
11. Basic Standards
A groundwater point of compliance was not established for
(Interim Narrative
CWQCC regulation
the Bowie No. 1 Mine based on existing groundwater quality
Standard) for Ground
41.5.C.6
and use and a prediction in the Probable Hydrologic
Water
Consequences section of C-1981-038 that mining will not
likely have a negative effect on groundwater.
All parameters were met for the 2015 Water Year, with the
exception of the following:
SM01— TDS Ratio
12. Parameters to be
SM05 — TDS Ratio
analyzed in ground
Table 2 of 2015 AHR
SM06 — Flow Rate
water samples
SM07 — Conductivity, TDS Ratio
SM09 — TDS Ratio
SM11— TDS Ratio
Please provide information as to the justification for the
omission of parameters noted above.
Based on the information presented in the 2015 AHR the
13. Prevention of
disturbance to the hydrologic balance within and adjacent to
material damage to the
CDRMS regulation
the permit area caused by mining and reclamation at the
hydrologic balance
4.05.1(1)
Bowie No. 1 Mine is the minimum that can be expected from
outside the permit area
an underground mining operation at this location. Use of
best management practices indicates minimization of
disturbance to the hydrologic balance.
Discussion of the PHC begins on page 125 of Section
2.05.6(3)(b)(iv) of permit C-1981-038 and is divided into four
sections; effects to surface water from mine facilities, effects
to groundwater from mine facilities, effects to groundwater
within the permit and adjacent areas, and effects to surface
14. Agreement of
CDRMS regulation
water within the permit and adjacent areas.
observed hydrologic
2.05.6(3) and
impacts with "probable
requirement tkeep
Surface water — Monitoring data reported for springs and
hydrologic
ponds was somewhat consistent with baseline data and the
consequences" (PHC)
current, CDRM
IS
regulation 2.03.3(1)
predicted impacts identified in the PHC section on page 125
projected in mining
of Volume 1 of C-1981-038.
The water quality reported for a majority of surface water
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 2 below.