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Mr. Richard Raines Page 3 <br />June 22, 2006 <br />approximately 2 acre-feet. However, due to the mining start date in February of 2006 the <br />operational consumptive use at the Three Belts Pit during the approval period of this plan Is <br />24.01 acre-feet (22.13 acre-feel lost with the mined product and 1.88 acre-feet used for dust <br />control). <br />The source of replacement water For this combined plan will be from 8.5 Box Elder Ditch <br />shares. Lafarge owns 8.5 shares in the Box Elder Ditch and will use all of the shares in this <br />combined plan. The shares will be diverted into a recharge pit through an existing lateral from <br />the ditch. The recharge pit was recently constructed on the un-mined portion of the Three Bells <br />Pit site and it was excavated to only the upper portion of the gravel deposit and will not expose <br />additional ground water. The estimated recharge pit size is one acre. For the purposes of this <br />plan, evaporation from open water was assumed for the entire surface area of the recharge pit <br />for the number of days water was diverted into the recharge pit. Based on this approach, the <br />proportion of days with water diverted into the recharge pit to the number of days per month <br />was applied to the monthly gross evaporation rate, resulting in an evaporative consumptive use <br />from the recharge pit of approximately 2.09 acre-feet. <br />Lafarge owns 5.5 shares of the 6.0 shares historically utilized for the irrigation of the <br />Three Bells property (344.3 acres). The historical consumptive use credit of the 5.5 Box Elder <br />Ditch shares associated with the Three Bells Property was determined to be 281.4 acre-feet, <br />based on a historical consumptive use analysis that was completed in support of an application <br />for an augmentation plan pending in case no. 2002CW205. <br />Lafarge also owns 1 share of 3.5 shares historically utilized for the irrigation of the <br />Robert Wetzel Farm (145 acres) and another 2 shares of 5 shares historically used for the <br />irrigation of the Louis Swift Farm. The historical consumptive use credit of 1 Box Elder Ditch <br />share associated with the Weizel Farm was determined to be 43.8 acre-feet. This is based on a <br />historical consumptive use analysis that was completed in support of an application for an <br />augmentation plan pending In case no. 2002CW205. The historical consumptive use credit of <br />the 2 Box Elder Ditch shares associated with the Swift Farm was determined to be 101.1 acre- <br />feet based on the historical consumptive use analysis in case no. 94CW015. The total <br />consumptive use credit avallable from the 8.5 Box Elder Ditch shares is 426.26 acre-feet, which <br />will be diverted into the recharge pit each irrigation season. The return flow obligations from the <br />Box Elder Ditch will be maintained by the recharge plan. <br />A lease from the Lake Canal and Reservoir Company ("LCRC") will make replacements <br />for depletions not covered by the recharge program. A lease of 120.3 acre-feet of fully <br />consumable water from LCRC will make replacements from November 2005 through May 2006. <br />A copy of the LCRC lease was submitted to this office on January 6, 2006. The source of the <br />replacement water will be from Gray Lakes, which can deliver water to Box Elder Creek and <br />from there to the Cache La Poudre River. Approximately 2.93 acre-feet of water (0.25 percent <br />per stream mile) from the Gray Lakes will cover transit losses. The water storage right for the <br />Gray Lakes owned by LCRC is not presently decreed for augmentation, therefore a change of <br />use application for the Gray Lakes water storage right is proposed to be filed with the water <br />court. In addition, a detailed historical consumptive use analysis has not been provided. <br />According to the rnformatian provided by TZA Water Engineers, Inc. ('TZA") in a letter dated <br />March 15. 2006, LCRC water rights have historically been used to provide supplemental water <br />to irrigated lands with the Lake Canal Service area, Based upon the crop mix, irrigated acreage <br />and water available for irrigation TZA concluded that the Lake Canal system is water short. TZA <br />also noted that a historical consumptive use of 65% is not uncommon for the use of <br />supplemental reservoir water within water short ditch systems. For the purposes of this plan, <br />the consumptive use assocated with the Gray Lakes water was assumed to be 50%. This also <br />