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Page 2-43 of Volume 1 of the application contains information on water rights in the <br />vicinity of the operation. The applicant states that no ground water rights (spring and <br />wells) have been adjudicated within athree-mile radius of the permit area. One surface <br />water right i:> identified (H.G. McClane ditch) along East Salt Creek. It is highly unlikely <br />that this water right will be impacted by the operation. <br />The applicant has secured rights for 10 cfs discharge from the Mack Pumping Pipeline for <br />use at the mine. Total consumptive use projected for the Munger Canyon mining <br />operation, which will use water diverted from the same source, is less than 0.07 cfs. The <br />applicant has demonstrated that rights have been secured to sufficiently satisfy <br />consumptive: water use requirements for both operations. <br />Probable Hydrologic Consequences <br />The anticipated impacts of the Munger Canyon Mining operation on the quality and <br />quantity of ground water and surface water in the azea aze minimal. This is due mainly to <br />the small azea of surface disturbance related to the mine, as well as the chazacteristics of <br />the ground water environment. <br />The disturbance related to the operation will encompass approximately 122 acres, 35 of <br />which aze located in Munger Canyon. Compazed to the total drainage area in Munger <br />Canyon (5085 acres), approximately seven-tenths of a percent of the Munger Canyon <br />drainage will be impacted by the operation. Although increases in concentrations of total <br />dissolved solids (TDS) and total suspended solids (TSS) aze expected to result from the <br />disturbance, the azea! comparison indicates that the significance of the increases in TDS <br />would be diminished due to dilution, and TSS will be controlled by sediment ponds. <br />Furthermore:, once the runoff from the Munger watershed reaches the East Salt Creek <br />Valiey, the impact would be diminished further. The disturbance due to the portion of the <br />operation situated in Munger Canyon only accounts for five-hundredths of a percent of <br />the total drainage azea of East Salt Creek above the confluence with Munger Canyon <br />(67,223 acre:s). A similar relationship with respect to dilution occurs for the portion of <br />the operation situated along the East Salt Creek drainage (87 acres). This accounts for <br />approximately 0.12 percent of the total drainage area of East Salt Creek below the <br />confluence with Munger Canyon (72,373 acres). <br />There is a potential for the operation to deplete the quantity of flow in Munger Creek and <br />East Salt Creek. This potential is slight. Water stored in impoundments will always be <br />less than two acre-feet per structure and there aze only six structures. The ponds will also <br />be dewatered to the required storage capacity following any major storm event, thereby <br />retuning stored runoff to the system. Additionally, precipitation in the azea is so low <br />(8.8 inches :annually) that it is expected that very little to no water will be stored in the <br />impoundments most of the time. <br />35 <br />