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2009-09-02_REPORT - C1980004
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2009-09-02_REPORT - C1980004
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Last modified
8/24/2016 3:55:12 PM
Creation date
9/3/2009 10:07:19 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1980004
IBM Index Class Name
REPORT
Doc Date
9/2/2009
Doc Name
2008 AHR Response Letter
From
J. E. Stover & Associates, Inc
To
DRMS
Annual Report Year
2008
Permit Index Doc Type
Hydrology Report
Email Name
MPB
Media Type
D
Archive
No
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• 2008 AHR McClane & Munger Canyon Mines Page 6 <br />Probable Hydrologic Consequences <br />As demonstrated above, the mines had and will have a negligible effect upon the <br />hydrologic regime of East Salt Creek. The area disturbed is small, sedimentation and <br />surface water systems have functioned well for over ten years. The inherent poor quality <br />of surface water in the area is the result of site specific environmental factors not from <br />any impact caused by the mines. <br />Most storm events that have exceeded the design criteria required by the Division of <br />Reclamation, Mining and Safety have not been a problem for the system to handle. The <br />effect that the mine has on the groundwater hydrology of East Salt Creek has not been <br />detected. <br />The mines will not have a detrimental impact upon the groundwater of the East Salt <br />Creek Valley. This is based partially on the relative sizes of the operation and the size of <br />the aquifer. It is also based on the fact that the groundwater contained in the alluvium is <br />substandard. East Salt Creek is an accurate name. The water contained in the alluvium <br />is virtually unusable. Field water sampling has shown that the conductivity of the <br />groundwater is extremely high (3,000 to 100,000). <br />Data gathered for SW-1 and GW-3 are presented in the Tables N-1 through N-7 in <br />Appendix N. The Division's 1987 Material Damage guidelines require any measured <br />salinity values over 1,000 umhos/cm be reported as `suspect' values. Since baseline <br />• values for SW-1 and GW-3 far exceed the Division's 'suspect' levels, the Operator <br />compiled data in order to demonstrate mine discharge does not add salinity to the <br />already high values, rather, lowers the salinity in SWA and GW-3 during the irrigation <br />season. By improving the salinity of the waters in East Salt Creek and the East Salt <br />Creek alluvium, downstream farmers will not suffer loss of production due to the addition <br />of mine discharge. <br />• <br />Rev. 08/09
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