2012-02-02_REPORT - C1980006

• Permit No: C1980006
• IBM Index Class Name: REPORT
• Doc Date: 2/2/2012
• Doc Name: Response to 2010 Annual Hydrology Report Received on June 27, 2011
• From: DRMS
• To: Energy Fuels Coal, Inc
• Annual Report Year: 2010
• Permit Index Doc Type: Hydrology Report
• Email Name: RDZ
• Media Type: D
• Archive: No

Requirement
Requirement
citation
Require -
ment
complied
with?
(yes / no)
Comment
N. Prevention of
adverse impacts
to ground water
systems outside
the permit area
CDRMS
regulation
4.05.11
yes
The Probable Hydrologic Consequences section of the
permit application predicts no appreciable impacts to
ground water systems outside the permit area.
Bedrock ground water. There have been no significant
bedrock excavations or discharges of water into bedrock at
the loadout.
Alluvial ground water. Alluvium within the area of
influence of the mine is laterally discontinuous and of
limited areal extent (less than 300 acres in aggregate). The
only water from the Marr Mine that could reach the
alluvium would be surface runoff. No mine impacts to
alluvial ground water have been found in more than 10
years of data from the downgradient alluvial monitoring
wells at the loadout (AP -1 and AP -2). As discussed above,
the 2010 data indicate slightly elevated concentrations of
Mn, but these do not appear to be problematic nor caused
by mining activities.
0. Prevention of
impacts to ground
water that
adversely impact
the postmining
land use within
the permit area
CDRMS
regulations
4.05.1(2) and
4.05.11
yes
The approved post - mining land use of most of the permit
area is rangeland. As previously discussed, ground water in
at loadout has not been adversely impacted by mining and
reclamation operations at the Marr Mine.
P. Minimization of
disturbance to the
hydrologic
balance within
and adjacent to
the permit area
CDRMS
regulation
4.05.1(1)
yes
Changes to the hydrologic balance within and adjacent to the
permit area have been kept to the minimum that can be
expected from a surface coal mining operation.
Q. Prevention of
material damage
to the hydrologic
balance outside
the permit area
CDRMS
regulation
4.05.1(1)
yes
As previously discussed, monitoring data indicate material
damage has been prevented outside the permit area.
R. Agreement of
observed
hydrologic
impacts with
"probable
hydrologic
consequences"
(PHC) projected
in mining permit
CDRMS
regulation
2.05.6(2) and
requirement
to keep
information
current,
CDRMS
regulation
2.03.3(1)
yes
The Probable Hydrologic Consequences section of the
permit application predicts no appreciable impacts to the
hydrologic balance. Monitoring data in the hydrology
report confirms this prediction. Monitoring data indicate
the site has caused no significant impacts to the quality or
quantity of bedrock ground water, alluvial ground water, or
surface water.
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