2016-04-26_HYDROLOGY - M2000041 - Laserfiche WebLink

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Mr. Mark McLean, P.E. April 20, 2016 Page 3 of 5 DEPLETIONS Since the source of water is the existing Pueblo East Pit at Evans #2, the stream depletions were lagged using the same factors as for the gravel pit, Transmissivity: 100,000 gpd/ft Specific Yield: 0.2 ft/ft Distance to river: 1,710 ft Distance to boundary 5,460 ft The following Unit Response Function ("URF") was employed to calculate lagged depletions from pumping pursuant to this SWSP: Month 1 2 3 4 5 6 7 8 9 10 11 12 Year 1 (%) 22.5 28.0 12.1 7.3 5.8 4.6 4.0 3.4 2.7 2.4 2.0 1.7 Year 2 (%) 1.4 1.1 1.0 - - - - - - - - - In accordance with S 37-92-308(5), C.R.S., the depletions associated with this SWSP cannot exceed five years; therefore, any subsequent renewals of this SWSP will not allow pumping to occur beyond March 31, 2018, such that stream depletions will not extend beyond August 19, 2019. REPLACEMENTS The total depletions at EWSD I, LLC will not exceed the total depletions allocated in the EWSD I, LLC SWSP and Booth Well Association plan for augmentation decreed by the Division 2 Water Court in case no. 08CW12, which is anticipated to be similar to the 477.3 acre-feet of wellhead depletions allocated in 2015. The depletions will be computed as the pumping from the EWSD I, LLC wells times their appropriate depletions factors, plus 100 percent of the deliveries for irrigation from the Pueblo East Pit at Evans #2 dewatering system. Should any factors change during the plan year under the EWSD I, LLC or Booth plans, the new total allotted depletions for these four wells will become the new limit under this SWSP. Replacement for the EWSD I, LLC and Booth irrigation well pumping will continue to be made as per the EWSD I, LLC SWSP and Booth plan for augmentation currently in place, slightly reduced to take into account the slightly reduced pumping. Replacement for depletions resulting from the Pueblo East Pit at Evans #2 dewatering deliveries will be made by AGUA using any of their fully consumable sources to be delivered to the Arkansas River between Pueblo Reservoir and Chico Creek. CONDITIONS OF APPROVAL This plan is hereby approved pursuant to S37-92-308(5) C.R.S. and the following conditions: 1. This plan shall be valid from April 1, 2016 through March 31, 2017, unless otherwise revoked or modified. Should an additional SWSP be requested, the provisions of S37- of cod 1313 Sherman Street, Room 821,Denver, CO 80203 P 303.866.3581 F 303.866.3589 www.water.state.co.us F�John W. Hickentooper,Governor I Robert Randall, Interim Executive Director �o I tt3 a }1876