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2008-10-15_REPORT - C1980006
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2008-10-15_REPORT - C1980006
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Last modified
8/24/2016 3:37:09 PM
Creation date
10/17/2008 1:43:11 PM
Metadata
Fields
Template:
DRMS Permit Index
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
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Require- <br /> <br />Requirement Require-ment <br />citation ment <br />complied <br />Comment <br /> with ? <br /> es/no <br />J. Sampling Table 61 of <br />frequency of CDRMS <br />ground water mining yes <br />monitoring wells permit C-80- <br /> 006 <br />K. Para- Table 61 of <br />meters to be CDRMS <br />analyzed in <br />ground mining yes <br /> permit C-80- <br />water 006 <br />samples <br /> DBMS previously concluded the Marr Mine does not have <br /> the potential to negatively impact ground water and, <br /> therefore, a ground water point of compliance is not <br /> warranted (Memo to Hydrology file, dated 6/13/07). The <br />L. Basic Standards CWQCC determination was based on the mine pits' position on the <br />for Ground regulations yes west flank of the Johnny Moore syncline where water table <br />Water 41.4 and 41.5 (unconfined) conditions exist inside the pits, resulting in a <br /> hydraulic gradient sloped toward the pits. <br /> The pits would have disrupted the potentiometric surface <br />M <br />Restoration of in an area that extends beyond the perimeters of the pits. <br />. <br />ground water CDRMS Full recovery of the potentiometric surface can be expected <br />recharge to regulation yes outside of the pits and water table (unconfined) conditions <br />approximate 4.05.11(3) would develop inside the backfilled pits. Formation of <br /> significant surface spoil springs is not expected at the Marr <br />premining rate Mine; therefore, there will be no loss of ground water flows <br /> to surface waters. <br />Page 2
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