2008-10-15_REPORT - C1980006

• Permit No: C1980006
• IBM Index Class Name: REPORT
• Doc Date: 10/15/2008
• Doc Name: 2007 AHR Review Letter
• From: DRMS
• To: Northwest Colorado Consultants, Inc
• Annual Report Year: 2007
• Permit Index Doc Type: Hydrology Report
• Email Name: TAK
• Media Type: D
• Archive: No

Require-

Requirement Require-ment
citation ment
complied
Comment
with ?
es / no
0. Prevention of The approved post-mining land use of most of the permit
impacts to area is rangeland. As previously discussed, ground water in
ground water CDRMS the overburden and coal seam have not been adversely
that adversely regulations
yes
impacted by mining and reclamation operations at the Marr
the
impact
impact the 4.05.1(2) and
Mine. Spoil leachate is not likely to degrade ground water in
land
postmining 4.05.11 the future as explained in the previous discussion of Basic
use within the Standards for Ground Water.
permit area
P. Minimization of
disturbance to the CDRMS Changes to the hydrologic balance within and adjacent to the
hydrologic regulation es permit area, if any, would be the minimum that can be
balance within 4.05.1(1) y expected from a surface coal mining operation.
and adjacent to
the permit area
Q. Prevention of
material damage CDRMS As previously discussed, monitoring data indicate material
to the hydrologic regulation yes damage has been prevented outside the permit area.
balance outside 4.05.1(1)
the permit area
R. Agreement of CDRMS
observed regulation The Probable Hydrologic Consequences section of the
hydrologic 2.05.6(2) and permit application predicts no appreciable impacts to the
impacts with requirement hydrologic balance. Monitoring data in the hydrology
"probable to keep yes report confirms this prediction. Monitoring data indicate
hydrologic information the mine has caused no significant impacts to the quality or
consequences" current, quantity of bedrock ground water, alluvial ground water, or
(PHC) projected CDRMS
regulation surface water.
in mining permit 2,03.3(1)
S. Adequacy of CDRMS The monitoring program is adequate. Based on data in
ground water regulation yes the annual hydrology report for 2007 and previous years,
monitoring program 4.05.13(1) and as set forth above, the operator has demonstrated for
the mine area, only: the qualities and quantities of runoff
without treatment are consistent with the requirements of
T. Adequacy of CDRMS 4.05; the operation has minimized disturbance to the
surface water regulation yes hydrologic balance in the permit and adjacent areas; the
monitoring 4.05.13(2) operation has prevented material damage to the hydrologic
program balance outside the permit area; and the water rights of
other users have been protected.
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