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nouloots SIIHOP•eROOD[N Assact4P7S. INC. <br />Table 4 <br />VALCO, INC. <br />SWSP ACCOUNTING PROJECTION <br />Lamar East Pit <br />(all values in acre-feet unless otherwise indicated) <br />Page3of4 <br />Notes: Shaded months correspond with projection data, non.shaded morphs correspond with actual data. <br />[1] Total exposed groundwater surface area in the pit. Increases to the luty 2005 measured area are estimated by Valco, <br />(2) Total gravel mined below the groundwater table as reported by Valco. <br />[3] Required evaporative teplecement based upon the following: Equals ([1] • 15.4 so) x 3.1 ft x monthly%. <br />13.20 ac = pre -1981 exposed groundwater surface area (does not require augmeotadcn) <br />4.15 feet as annual net evaporation rate at the site <br />[4] Water in mined gravel is 4% by weight of the gravel produced. Equals [2] x (1/1359 af/ton of water) x 4%. <br />[5] Total depletions requiring replacement. Equals [3] + (4]. <br />[6] Consumptive use credit for 8 regular LAWMA shares at 95% allocation. (based on 2008 allocation). <br />(7] Consumptive use credit for 90 preferred LAWMA shares. As of March 2008 Valco purchased 90 LAWMA shares. Equals greater ofzero and <br />[5) - [6]. <br />[8] Pueblo Board of Water Warks scheduled release for Rocky Ford Bast Pit. <br />[9] Required Pueblo Board of Water Works lease volume needed to replace remaining depletions. Equals greater of zero and (51 • [6] - [7]. <br />(1D] Remaining Aepledons () or Surplus Credit ( +) after accounting for replacement sources. Equals [6] + [7] +18j - [5) <br />INDrriAO•wdaAt0004010 AaaaaetnAwas PaJtedxAmamtlu;ab Aught 11 <br />uvaO, WORM LWI <br />