2023-02-09_REPORT - C1981044

• Permit No: C1981044
• IBM Index Class Name: Report
• Doc Date: 2/9/2023
• Doc Name: Annual Hydrology Report Adequacy Review
• From: DRMS
• To: File
• Annual Report Year: 2021
• Email Name: RAR
• Email Name: JLE
• Media Type: D
• Archive: No

Requirement Citation Comment
Water levels for well 259 were ploted on Figure 10 of the
AHR, however no explicit mention of 2021 water levels was
apparent in the data for well 259
21. Prevention of Comparisons with the Basic Standards for ground water and the
adverse impacts to CDRMS baseline water data are discusses in item 19 above. MCM
ground water regulation believes that no significant impacts from mining occurred in
systems outside the 4.05.11 the groundwater system as a result of mining.
permit area
22. Impacts to ground The post mining land uses comprise rangeland/wildlife and
water that adversely CDRMS pastureland. See items 19, 20,and 21 above.
impact the post regulations
mining land use 4.05.1(2)and
within the permit 4.05.11
area
MCM reports that no significant,unpredicted, or adverse
23. Minimization of impacts were noted during groundwater hydrologic monitoring
disturbance to the CDRMS for 2021.
hydrologic balance regulation
within and adjacent 4.05.1(1)
to the permit area
24. Prevention of Comparisons with the Basic Standards for ground water and the
material damage to CDRMS baseline water data are discusses in item 19 above. MCM
the hydrologic regulation believes that no significant impacts from mining have occurred
balance outside the 4.05.1(1) on the groundwater system as a result of mining.
permit area
Section 2.05.6 of the permit discusses the probable hydrologic
consequences of the mining operation at the Williams Fork
25. Agreement of CDRMS Mines. This section primarily discusses monitoring results and
observed hydrologic regulation trends from the 80's and early 90's. The possible impacts
impacts with PHC discussed are very general and predict that mining should have
projected in permit 2.05.6(3) no significant impact on the hydrologic balance. MCM reports
that no significant,unpredicted,or adverse impacts were noted
during hydrologic monitoring for 2021.
The ground water monitoring program appears adequate at this
26. Adequacy of CDRMS time.
groundwater regulation MCM needs to determine sampling status of the YAW alluvial
monitoring program 4.05.13(1) wells, inform DRMS of the sampling frequency and update the
permit and future AHR submittals.
27. Adequacy of surface CDRMS The surface water monitoring program appears adequate at this
water monitoring regulation time.
program 4.05.13(2)
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