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Loloff Pit SWSP Page 2 of 7 <br />February 25, 2015 <br />evaporation of exposed ground water surface was calculated to be 4.43 acre -feet for this plan year. The <br />estimated monthly depletions due to evaporation during 2015 are shown on the attached Table 1. <br />Operational losses associated with mining activities will consist of water removed with the mined <br />product and water used for dust control. Approximately 500,000 tons of material is projected to be <br />mined in 2015. A 2% water loss is assessed as the material will be mined in a dewatered state and will <br />not be washed. The quantity of water removed with the mined product is therefore estimated to be <br />7.36 acre -feet. A total of 4.10 acre -feet of water are estimated to be used for dust control purposes in <br />2015 based on a usage rate of 2,100 to 5,600 gallons per day. All water used for dust control purposes is <br />assumed to be 100% consumed. The estimated monthly depletions due to operational losses during 2015 <br />are shown on the attached Table 2. <br />The IDS Alluvial Water Accounting System (AWAS) analytical stream depletion model was used to <br />calculate the lagged depletions to the Cache la Poudre River. The model was executed in Effective SDF <br />mode, using a stream depletion factor (SDF) of 60 days for the Loloff Pit site. The total lagged <br />depletions were determined to be 17.67 acre -feet for this plan period, as shown in the attached Table 4. <br />This amount includes lagged depletions resulting from past consumptive use at the site that are <br />projected to impact the river during this plan period. <br />Replacement Sources <br />The replacement sources proposed for this operation include yield from one share of the Greeley <br />Irrigation Company ( "GIC ") during the irrigation season, and leased water from the City of Greeley <br />( "Greeley ") during the non - irrigation season. <br />Greeley Irrigation Company5hare <br />Loloff owns one share of the Greeley Irrigation Company, Certificate No. 3391. The share was <br />historically used for the irrigation of approximately 8.5 acres of land which have been removed from <br />production as part of the share acquisition. <br />A portion of the Greeley Canal No. 3 (WDID 0300934) was changed in Division 1 Water Court in <br />case no. 1996CW658 based on a ditch -wide analysis by the Poudre Prairie Mutual Reservoir and Irrigation <br />Company. The use of the subject ditch share in this plan shall be in accordance with the terms and <br />conditions decreed in case no. 1996CW658, including monthly and annual volumetric limits on water <br />deliveries and monthly return flow requirements. The decree in case no. 1996CW658 found that 519.7 <br />shares were used to irrigate 3,501 acres with an average historical consumptive use of 5,358 acre -feet <br />per year, which yields an average consumptive use credit of 10.31 acre -feet per share (5,358 acre - <br />feet /519.7 shares). <br />In paragraph 6.7.4 of the decree in case no. 1996CW658, future farm headgate deliveries of the <br />67.75 shares were limited to 1,712 acre -feet per year (25.26 acre -feet per share) and 12,631 acre -feet <br />(186.43 acre -feet per share) in any consecutive 10 year period. Deliveries of Loloff's share of GIC water <br />under this plan must comply with these limits. The historical return flows shall be maintained in <br />accordance with the return flow factors identified in case no. 1996CW658. The return flows associated <br />with the delivery of Fossil Creek Reservoir water that is attributable to the subject GIC share shall also <br />be maintained in accordance with the surface and subsurface factors decreed in case no. 1996CW658. <br />For projections of 2015 deliveries, the Applicant used the historic irrigation delivery attributable <br />to GIC direct flow diversions of 18.6 acre -feet per share and the historic irrigation delivery attributable <br />to Fossil Creek Reservoir deliveries of 1 acre -foot per share as determined in case no. 1996CW658 for the <br />study period of 1950 -1979. As specified in case no. 1996CW658, all deliveries of GIC water incur an <br />immediate surface return flow obligation of 23.7% for direct deliveries and 20.1% for Fossil Creek <br />deliveries, which corresponds to surface return flow obligations of 4.41 acre -feet and 0.59 acre -feet, <br />