REP13265

• Permit No: C1981044
• IBM Index Class Name: Report
• Doc Date: 7/29/2002
• Doc Name: 2001 AHR Review Memo
• From: TAK
• To: JHB
• Annual Report Year: 2001
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Require- Complied with? ~
Requirement ment (yes / no) Comment
citation
P. Para- Exhibit 29 of
meters to be CDMG
analyzed in
ground mining yes
permit C-81-
water 044
sam les
The Middle Sandstone is the aquifer most likely to
be affected by mining at Eagle. It is monitored
downgradient from Eagle's underground workings
in well TR-7A. Data from this well indicates
compliance with the Basic Standards if a
Q. Basic Standards CWQCC compliance point were established at the well
for Ground regulations yCS location. NPDES monitoring of mine pumping at
Water 41.4 and 41.5 outfalls 024 and 003 shows Bumped water would
not degrade ground water if the lumped water
seeps through the walls of the workings. The
lumped water is regularly pumped down to prevent
flooding of the workings. The pumping limits the
head acting on the walls of the workings, thus
limitin see a e.
R. Restoration of The Eagle Mines are located along the outcrop belt
ground water CDMG
of the Williams Fork Formation. Ground water is
rechazge to regulation yes recharged in this outcrop belt. The Eagle Mines do
approximate 4.05.11(3) not diminish the amount of this rechazge.
reminin rate
S. Prevention of
Compliance with the Basic Standards for ground
adverse impacts CDMG water, as explained in item Q, above, indicate the
to ground water regulation yeS permittee is preventing adverse impacts to ground
systems outside 4.05.71 water systems outside the permit area.
the ennit area
T. Prevention of
impacts to
The postmining land uses of rangeland/wildlife,
ground water CDMG pastureland, and cropland will not use ground water.
that adversely regulations Yes Consequently, any impact to ground water will not
impact the 4.05.1(2) and impact the postmining land use in the permit area.
postmining land 4.05.11
use within the
ermit area
The disturbance to the hydrologic balance within
U. Minimization of and adjacent to the permit area caused by mining
disturbance to the CDMG and reclamation at the Eagle Mines is the
hydrologic regulation eS minimum that can be expected from an
balance within
4.05.1(1) y underground mining operation at this location.
and adjacent to Use of best management practices indicates
the permit area minimization of disturbance to the hydrologic
balance.
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