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Holcim South Platte Combined SWSP April 14, 2025 <br /> Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, 5475, 5829, Ft 6243 Page 21 of 37 <br /> owned by DPG Farms yielded in excess of 6.5 acre-feet of water per irrigated acre. This <br /> "extra" water would have been available for other shareholders to divert, or would have <br /> been left in the ditch and turned back to the South Platte River at the end of the ditch <br /> wasteway. Due to this historical practice, a demand-based analysis was used to quantify <br /> historical consumptive use and historical return flow patterns for the shares. The modeled <br /> farm headgate delivery was determined as the lesser of the Patterson Ditch pro-rata farm <br /> headgate delivery and the calculated farm headgate delivery (calculated as the crop <br /> irrigation requirement divided by a 45 percent irrigation efficiency) for each month in the <br /> study period. <br /> The requested farm headgate delivery amount associated with the 8 shares in the Patterson <br /> Ditch for the period of May 1, 2025 through December 31, 2025 is 76 acre-feet with a <br /> consumptive use of 31.87 acre-feet and a return flow obligation of 44.13 acre-feet. The <br /> Applicant's deliveries under this SWSP are limited to the period of May through October. <br /> The historical return flow obligations associated with the 8 shares must be maintained under <br /> this SWSR For the months of May through September, the daily return flow obligation will be <br /> determined by multiplying the applicable monthly return flow factor by the daily farm <br /> headgate delivery associated with the subject shares. For the months of October through <br /> December, the daily return flow obligation will be determined by multiplying the applicable <br /> monthly return flow factor by the previous year's (April through October) total deliveries <br /> associated with the subject shares, and then divided by the number of days in the month. <br /> Denver Julesburg Water Resources Partners LLC Lease <br /> Holcim has a lease from Denver Julesburg Water Resources Partners LLC for 7.0 acre-feet of <br /> replacement supplies in excess of those needed to replace depletions in the augmentation <br /> plan decreed in Division 1 Water Court case no. 2012CW179. The water will be delivered to <br /> the South Platte River at the Cache la Poudre confluence during the month of October 2025 <br /> at an average daily rate of 0.11 cfs. The decree in case no. 2012CW179 contemplated <br /> limited use of excess recharge accretions generated under the decree in substitute water <br /> supply plans, as described in paragraph 11.9.1. <br /> The amount of excess replacement supplies will be determined by tracking daily operations <br /> under the 2012CW179 decree as reported in the monthly accounting for that case. The <br /> accounting identifies replacement water available by Administrative Reach. All diversions of <br /> excess replacement supplies will be measured by continuous recording devices. Deliveries <br /> will be made within the Administrative Reach 3. <br /> Replacement Summary <br /> The proposed depletions and replacements are shown in the attached "South Platte <br /> Combined Substitute Supply Plan Accounting 2025". The transit loss for each stream was <br />