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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 />49 <br />Apr -05 <br />5.77. <br />264.472 <br />245.338 <br />4.6582 <br />50 <br />May -05 <br />7.68 <br />272.155 <br />251.605 <br />6.2671 <br />51 <br />Jun -05 <br />9.84 <br />281.993 <br />259.614 <br />8.0092 <br />52 <br />Jul -05 <br />9.50 <br />291.491 <br />268.066 <br />8.4512 <br />53 <br />Aug -05 <br />8.22 <br />299.708 <br />275.930 <br />7.8647 <br />Year 5 <br />54 <br />Sep -05 <br />6.84 <br />306.547 <br />282.849 <br />6.9183 <br />55 <br />Oct -05 <br />4.61 <br />311.158 <br />288.232 <br />5.3833 <br />62.30 <br />56 <br />Nov -05 <br />2.54 <br />313.694 <br />291.922 <br />3.6905 <br />57 <br />Dec -05 <br />1.96 <br />315.650 <br />294.705 <br />2.7828 <br />58 <br />Jan-06 <br />1.99 <br />317.638 <br />297.207 <br />2.5014 <br />59 <br />Feb -06 <br />2.40 <br />320.036 <br />299.817 <br />2.6104 <br />60 <br />Mar -06 <br />3.37 <br />323.409 <br />302.983 <br />3.1657 <br />61 <br />Apr -06 <br />4.99 <br />328.401 <br />307.230 <br />4.2469 <br />62 <br />May -06 <br />6.80 <br />335.205 <br />312.858 <br />5.6288 <br />63 <br />Jun -06 <br />8.62 <br />343.822 <br />319.977 <br />7.1185 <br />64 <br />Jul -06 <br />8.44 <br />352.263 <br />327.528 <br />7.5510 <br />65 <br />Aug -06 <br />7.25 <br />359.518 <br />334.546 <br />7.0184 <br />Year 6 <br />66 <br />Sep -06 <br />6.04 <br />365.557 <br />340.717 <br />6.1705 <br />67 <br />Oct -06 <br />4.08 <br />369.642 <br />345.534 <br />4.8173 <br />55.79 <br />68 <br />Nov -06 <br />2.25 <br />371.887 <br />348.852 <br />3.3176 <br />69 <br />Dec -06 <br />1.72 <br />373.612 <br />351.359 <br />2.5072 <br />70 <br />Jan-07 <br />1.74 <br />375.356 <br />353.608 <br />2.2487 <br />71 <br />Feb -07 <br />2.10 <br />377.461 <br />355.947 <br />2.3398 <br />72 <br />Mai -07 <br />2.95 <br />380.415 <br />358.768 <br />2.8211 <br />73 <br />Apr -07 <br />4.99 <br />385.408 <br />• 362.877 <br />4.1091 <br />74 <br />May -07 <br />6.80 <br />392.211 <br />368.455 <br />5.5771 <br />75 <br />Jun -07 <br />8.62 <br />400.828 <br />375.541 <br />7.0860 <br />76 <br />Jul -07 <br />8.44 <br />409.270 <br />383.069 <br />7.5283 <br />77 <br />Aug -07 <br />7.25 <br />416.524 <br />390.071 <br />7.0019 <br />Year 7 <br />78 <br />Sep -07 <br />6.04 <br />422.563 <br />396.229 <br />6.1583 <br />79 <br />Oct -07 <br />4.08 <br />426.648 <br />401.037 <br />4.8082 <br />55.49 <br />80 <br />Nov -07 <br />2.25 <br />428.894 <br />404.348 <br />3.3110 <br />81 <br />Dec -07 <br />1.72 <br />430.619 <br />406.851 <br />2.5025 <br />82 <br />Jan-08 <br />1.74 <br />432.362 <br />409.096 <br />2.2455 <br />83 <br />Feb -08 <br />2.10 <br />434.467 <br />411.434 <br />2.3378 <br />84 <br />Mar -08 <br />2.95 <br />437.422 <br />414.254 <br />2.8202 <br />85 <br />Apr -08 <br />4.99 <br />442.414 <br />418.363 <br />4.1091 <br />86 <br />May -08 <br />6.80 <br />449.218 <br />423.941 <br />5.5778 <br />87 <br />Jun -08 <br />8.62 <br />457.834 <br />431.028 <br />7.0873 <br />88 <br />Jul -08 <br />8.44 <br />466.276 <br />438.559 <br />7.5301 <br />89 <br />Aug -08 <br />7.25 <br />473.531 <br />445.563 <br />7.0042 <br />Year 8 <br />90 <br />Sep-08 <br />6.04 <br />479.570 <br />451.724 <br />6.1610 <br />91 <br />Oct -08 <br />4.08 <br />483.655 <br />456.535 <br />4.8112 <br />55.52 <br />92 <br />Nov -08 <br />2.25 <br />485.900 <br />459.849 <br />3.3143 <br />93 <br />Dec -08 <br />1.72 <br />487.625 <br />462.355 <br />2.5060 <br />94 <br />Jan-09 <br />1.74 <br />489.369 <br />464.604 <br />2.2492 <br />95 <br />Feb-09 <br />2.10 <br />491.474 <br />466.946 <br />2.3417 <br />96 <br />Mar -09 <br />2.95 <br />494.428 <br />469.770 <br />2.8243 <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 />1111111110 k Applegate <br />;` Group. b. <br />Rich Pit Unused Wash Pond <br />page 2 of 3 <br />