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Amended Aggregate Industries South Platte Combined SWSP August 27, 2019 <br /> Plan I Ds 3614, 47731 3624, 47721 4616, 3437, 3376, 3650, 3668, and 5475 Page 14 of 21 <br /> no. 87CW127. Prior to use of these shares as a replacement source, the Applicant must demonstrate <br /> that the shares have continued to be used in approximately the same way as considered in case no. <br /> 87CW127 since the decree was entered on June 5, 1991 (that there has been no change in <br /> circumstance), or the Applicant must take into account any periods of non-use or undecreed use in <br /> determining the actual historic consumptive use of the shares. <br /> Leggett-Owens Reservoir <br /> Prior to use of these shares as a replacement source, the Applicant must provide a full <br /> historic consumptive use analysis for the subject shares. <br /> Lupton Bottom Seep Ditches No. 1 and No. 2 <br /> Prior to use of these shares as a replacement source, the Applicant must provide a full <br /> historic consumptive use analysis for the subject shares. <br /> Platte River Power Authority Lease <br /> Aggregate has previously utilized leased water from the Platte River Power Authority <br /> ("PRPA") as a replacement source in this SWSP. For this SWSP period, the use of leased water from <br /> the PRPA is not necessary and is not proposed to be utilized. In the future, Aggregate may use <br /> leased water from the PRPA if a supplemental source of replacement water is needed. <br /> Silver Heights Lease <br /> Aggregate seeks the flexibility to use water from this source when needed. Applicant must be <br /> able to account for and deliver Plum Creek water, including proper accounting and tracking in the <br /> Chatfield Reservoir Daily accounting; augmentation station releases, transit loss, etc. <br /> Smith Et Emmons Ditch <br /> Aggregate owns 1.5 of 8 total outstanding shares in the Smith Et Emmons Ditch Company. The <br /> 1.5 Smith Et Emmons Ditch shares were historically used to irrigate 68 acres of pasture grass. Using a <br /> Blaney-Criddle analysis the potential crop consumptive use for the 68 acres was determined to be <br /> 108.7 acre-feet. Assuming a 10% ditch loss and 55% farm efficiency the dry-year consumptive use <br /> was determined to be 91.65 acre-feet for the 1.5 shares. <br /> The Applicant will install a return structure to measure Smith &t Emmons Ditch deliveries <br /> associated with the subject shares back to the stream prior to claiming use of this source. The <br /> applicant may not utilize the 1.5 shares of Smith Et Emmons Ditch as a replacement source in this <br /> SWSP until such time as all required measurement and bypass structures have been installed and <br /> approved by the water commissioner. <br /> Dewateri ng <br /> All sites that are actively dewatering have been equipped with a Totalizing Flow Meter <br /> ("TFM") to measure the dewatering discharge. Monthly dewatering volumes must be recorded <br /> monthly with the meter readings included on submitted accounting. As long as dewatering <br /> operations remain continual at constant rates the net accretions are assumed to offset any lagged <br /> depletions. Under this assumption, the Applicant is not claiming any dewatering credit. Once <br /> dewatering operations stop, or are significantly reduced, at specific sites the monthly meter readings <br /> will be used to analyze post pumping depletions. The sites that will be actively dewatered during <br /> this SWSP period are the Wattenberg Pit, W.W. Farms Pit, and the Tull Pit. <br />