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Cumulative <br />Time <br />(months) <br />Month <br />Consumed <br />Volume <br />Pumped <br />(ac -ft) <br />Cumulative <br />Volume <br />Pumped <br />(ac -ft) <br />Cumulative <br />Volume of <br />Depletion <br />(ac -ft) <br />Volume of <br />Depletion <br />This Step <br />(ac -ft) <br />Volume of <br />Stream <br />Depletions <br />(ac -ft) <br />97 <br />Apr -09 <br />4.92 <br />499.344 <br />473.841 <br />4.0708 <br />98 <br />May -09 <br />6.70 <br />506.046 <br />479.350 <br />5.5090 <br />99 <br />Jun-09 <br />8.49 <br />514.541 <br />486.348 <br />6.9975 <br />100 <br />Jul -09 <br />8.31 <br />522.855 <br />493.777 <br />7.4299 <br />101 <br />Aug-09 <br />7.14 <br />529.995 <br />500.684 <br />6.9068 <br />Year 9 <br />102 <br />Sep -09 <br />5.96 <br />535.950 <br />506.765 <br />6.0811 <br />103 <br />Oct -09 <br />4.03 <br />539.976 <br />511.517 <br />4.7512 <br />54.83 <br />104 <br />Nov -09 <br />2.21 <br />542.187 <br />514.791 <br />3.2745 <br />105 <br />Dec -09 <br />1.70 <br />543.887 <br />517.269 <br />2.4780 <br />106 <br />Jan -10 <br />1.72 <br />545.605 <br />519.494 <br />2.2250 <br />107 <br />Feb -10 <br />2.08 <br />547.680 <br />521.811 <br />2.3166 <br />108 <br />Mar -10 <br />2.91 <br />550.588 <br />524.600 <br />2.7895 <br />109 <br />Apr -10 <br />4.92 <br />555.504 <br />528.659 <br />4.0586 <br />110 <br />May -10 <br />6.70 <br />562.206 <br />534.165 <br />5.5063 <br />111 <br />Jun -10 <br />8.49 <br />570.701 <br />541.162 <br />6.9970 <br />112 <br />Jul -10 <br />8.31 <br />579.015 <br />548.593 <br />7.4305 <br />113 <br />Aug -10 <br />7.14 <br />586.155 <br />555.501 <br />6.9081 <br />Year 10 <br />114 <br />Sep -10 <br />5.96 <br />592.110 <br />561.584 <br />6.0829 <br />115 <br />Oct -10 <br />4.03 <br />596.136 <br />566.337 <br />4.7533 <br />54.83 <br />116 <br />Nov -10 <br />2.21 <br />598.347 <br />569.614 <br />3.2770 <br />117 <br />Dec -10 <br />1.70 <br />600.047 <br />572.095 <br />2.4807 <br />118 <br />Jan -11 <br />1.72 <br />601.765 <br />574.322 <br />2.2278 <br />119 <br />Feb-11 <br />2.08 <br />603.840 <br />576.642 <br />2.3196 <br />120 <br />Mar -11 <br />2.91 <br />606.748 <br />579.435 <br />2.7926 <br />121 <br />Apr -11 <br />5.07 <br />611.816 <br />583.581 <br />4.1462 <br />122 <br />May -11 <br />6.91 <br />618.725 <br />589.239 <br />5.6578 <br />123 <br />Jun -11 <br />8.76 <br />627.481 <br />596.438 <br />7.1992 <br />124 <br />Jul -11 <br />8.57 <br />636.053 <br />604.087 <br />7.6486 <br />125 <br />Aug -11 <br />7.36 <br />643.413 <br />611.198 <br />7.1118 <br />Year 11 <br />126 <br />Sep -11 <br />6.14 <br />649.551 <br />617.461 <br />6.2625 <br />127 <br />Oct -11 <br />4.15 <br />• 653.701 <br />622.354 <br />4.8929 <br />56.40 <br />128 <br />Nov -11 <br />2.28 <br />655.981 <br />625.725 <br />3.3718 <br />129 <br />Dec -11 <br />1.75 <br />657.733 <br />628.277 <br />2.5516 <br />130 <br />Jan -12 <br />1.77 <br />659.505 <br />630.569 <br />• 2.2916 <br />131 <br />Feb -12 <br />2.14 <br />661.644 <br />632.955 <br />2.3867 <br />132 <br />Mar-12 <br />3.00 <br />664.642 <br />635.830 <br />2.8747 <br />Lafarge West, Inc. <br />Rich Pit, M -85 -218 <br />Mining Stream Depletions - <br />Active Pit <br />Stream Depletion Factor = <br />Stream Depletion Analysis Using Stream Depletion Factors <br />7.3 days <br />3/3/11 <br />Applegate <br />Group. <br />Rich Pit Unused Wash Pond <br />page 3 of 3 <br />