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<br /> <br />L~ <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br />Table 6 <br />Western Mobile, Inc. <br />Average Impact on Streamllow <br />Miller and Rockin' WP North Pits <br /> Historic Conditions Future Conditions <br /> Depth to Discharge from Recharge from Discharge from Recharge from Impact of Mining on <br />Date <br /> Water Surface Alluvium to Stream Stream to Alluviwn Alluvium to Stream Stream to Alluvium Flow in Stream <br /> (1) (2) (3) (4) (5) (6) <br /> (feet) (acre-feet) (acre-feet) (acre-fee[) (acre-feet) (acre-feet) (cfs) <br />15-Dec 5.78 <br /> 2,4 9.7 7.3 0.12 <br />15-Jan 5.88 <br /> 1.6 6.6 5.0 0.08 <br />15-Feb 5.95 <br /> 0.3 1.3 -I.0 -0.02 <br />15-Mar 5.94 <br /> 12.2 50.3 -38.0 _0.62 <br />IS-Apr 5.42 <br /> 31.-1 128.9 -97.5 -1.64 <br />IS-May 4.11 <br /> 6.8 28.1 21.3 0.35 <br />15-Jun 4.40 <br /> 6.1 24.9 -18.9 -0.32 <br />15-Jul 4.14 <br /> 2.7 11.0 -8.3 -O.14 <br />15-Aug 4.03 <br /> 19.4 79.5 60,1 0.98 <br />15-Sep 4.84 <br /> 7.8 32.2 24.3 0.41 <br />15-Oct 5.17 <br /> 10.4 -12.6 32.2 0,52 <br />15-Nov 5.60 <br /> 4.3 17.8 13,5 0,23 <br />IS-Dec 5.78 <br />Total 52.7 52.7 216.3 216.4 0.0 <br />Notes: Mined Area : 159.03 acres <br />Pond Area : 97.93 acres <br />Specific Yield 0. l5 <br />(1) Depth to water surface is detzrmined Gom the average dcpihs ol'all pizzomzters for thz study period, Gom Figure 3. <br />(2) Historic discharge Gom alluvium to stream zquals the change in the depth to the water table from thz previous monUr times thz <br />mined area times the specific yield of the aquifer, during periods whin the water table historically drops <br />(3) Historic recharge Gom stream to alluvium equals the change in the depth to the water table from thz previous mouth times thz mined <br />area times the specific yield oCthz aquifer, during pz.riods whin the uatzr table historically rises <br />(4) Future discharge Gom alluvium to strznm equals the change in the depth to the water table from the previc us month times the <br />radioed pond area, as the specific yield oCthz ponds is 1.0, during periods when the water table historically drops. <br />(5) Historic recharge Gom stream to alluvium equals the change in the depth !o the water table Crom the previ ms month times the <br />unlined pond area, as the specific }'field of the ponds is 1.0, during periods• when the water table historically rises. <br />(6) The impacts of the currently permitted pits on (lore in sream equals the change in the storage duz to the nritturg operation plus the <br />addition of the unlined pits. Negative numbers represent a decreasz in stream0ow due to a decrease in discharge Crom the alluvium to <br />the svzams. Positive numbers represan an increase in strzamllows duz to a deazase iu recharge to the al uviwn. <br />-31- <br />