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Table 2. Total Depletion and Replacement for Del Camino Pit <br />Owens Brothers Concrete Co. <br />Item Cat o Jan Feb Mar A ~ Ma Jun •Jul ~ :. A °~ : -'Se ~- ~~C+d ~ NoJ ~ Dec' Total' <br />1 Avera a Preci nation in 0.51 0.69 1.21 1.81 2.47 1.58 1.93 1.53 1.23 0.98 0.82 0.55 15.31 <br />2 Gross Eva oration in 3.00 3.50 5.50 9.00 12.00 14.50 15.00 13.50 10.00 7.00 4.00 3.00 45.00 <br />3 Eva oration Distribution % 3.00 3.50 5.50 9.00 12.00 14.50 15.00 13.50 10.00 7.00 4.00 3.00 100.00 <br />4 Max Available Preci .Credit in 0.36 0.48 0.85 1.27 1.73 1.11 1.35 1.07 0.86 0.69 0.57 0.39 10.72 <br />5 Net De letion in 2.64 3.02 4.65 7.73 10.27 13.39 13.65 12.43 9.14 6.31 3.43 2.62 89.28 <br />6 Net De letion a 0.44 0.50 0.78 1.29 1.71 2.23 2.27 2.07 1.52 1.05 0.57 0.44 14.88 <br />7 Product Mined x1000 tons 10 10 20 30 50 50 50 50 10 10 10 0 300 <br />8 Product water a 0.29 0.29 0.59 0.88 1.47 1.47 1.47 1.47 0.29 0.29 0.29 0.00 8.82 <br />9 Total Depletion (a~ 0.73 0.80 1.36 2.17 3.18 3.70 3.74 3.54 1.82 1.35 0.87 0.44 23.70 <br />10 Potential CU in 0.69 2.09 6.70 10.68 8.91 3.74 0.50 <br />11 Potential CU a 5.72 17.45 55.81 89.03 74.28 31.17 4.19 <br />12 Ave. Ditch Diversion a 23.84 106.50 134.16 175.76 171.88 131.24 52.85 <br />13 CU a 5.72 17.45 55.81 89.03 74.28 31.17 4.19 <br />14 Effluent Needed (af) 0.73 0.80 1.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.87 0.44 4.20 <br />Notes: <br />(1) Average precipitation at Brighton <br />(2) Mean annual free water surface evaporation, NOAA T.R. NWS 33, Evaporation Atlas for the Contiguous 48 United States, June 1982 <br />(3) From SEO General Guidelines for Substitute Water Supply Plans for Sand and Gravel Pits, February 1995 <br />(4) Item 1'0.70 (this assumes that 70% of the average precipitation was historically consumed by native vegetation) <br />(5) Net depletion =Item 2 -Item 4 <br />(6) Based on 2 acres of exposed water in trenches <br />(8) 4% of product as water <br />(9) Evap. + Product water <br />(10) Average of 50°k corn and 50% alfalfa <br />(11) Based on 100 acres of crop <br />(12) Ave. diversion from Last Chance Ditch, see Table 1 <br />(13) Consumptive use by crops based on 60% irrigation efficiency. Crop with full supply equals pot. CU, otherwise limited to 60°~ of diversion. <br />(14) Effluent to be leased from Longmont <br />• <br /> <br />