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Holcim South Platte Combined SWSP September 18, 2025 <br /> Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, 5475, 5829, &t 6243 Page 11 of <br /> 37 <br /> through 1995, the Court found that the average annual gross river diversion was 10,600.2 <br /> acre-feet per year or 33.13 acre-feet per share. The ditch-wide analysis determined that the <br /> overall average consumptive use was 4,400.9 acre-feet per year or 13.75 acre-feet per share <br /> for 320 shares, assuming a system loss of 15% and a farm efficiency of 60%. In case no. <br /> 2002CW331, 8 shares historically used on 74 acres were found to have a river headgate <br /> diversion of 33.42 acre-feet per share and a consumptive use of 16.32 acre-feet per share <br /> (130.5 acre-feet total). After removing the consumptive use decreed for the 8 shares in case <br /> no. 2002CW331, the historical consumptive use for the remaining 312 shares was determined <br /> to be 4,270.4 acre-feet, or 13.69 acre-feet per share. For Holcim's 13.5 Whitney Ditch <br /> shares, the total average annual consumptive use would therefore equal 184.81 acre-feet <br /> per year. The ditch-wide analysis utilized a return flow split of 50% surface and 50% <br /> subsurface return flows. <br /> For the 2025 plan period, Holcim will dedicate all 13.5 of their Whitney Ditch shares to this <br /> SWSP. For the purposes of this SWSP, the projected farm headgate delivery has been <br /> estimated from a requested delivery of 14.47 acre-feet per share or 195 acre-feet for all <br /> 13.5 shares, which is less than a dry-year farm headgate delivery of 24.75 acre-feet per <br /> share (which includes a 15% ditch loss) or approximately 334 acre-feet for all 13.5 shares. <br /> After accounting for the return flow obligations, the total consumptive use credit for 2025 is <br /> projected to be approximately 112.04 acre-feet. <br /> Holcim will utilize the Whitney Ditch West return structure (WDID 0302904) owned by the <br /> Whitney Irrigation Company located in the SE'/ of Section 30, Township 6 North, Range 66 <br /> West, 61h P.M. to return the water attributable to their Whitney Ditch shares to the Cache la <br /> Poudre River. A temporary carriage agreement dated February 24th, 2025 between the <br /> Applicant and the Whitney Irrigation Company allows for the Applicant to release 13.5 <br /> Whitney shares through the Whitney Ditch's wasteway and augmentation structure during <br /> the 2025 irrigation season. <br /> The location of the historically irrigated land to be dried up for the subject Whitney Ditch <br /> shares was originally identified through an April 12, 2011 letter to the Division 1 Engineer. <br /> That letter stated the northern portion of Orr Farm #1 may continue to be irrigated using 1 <br /> of the 13.5 Whitney Ditch shares owned by the Applicant. In 2011 the entire Orr Farm #1 was <br /> removed from irrigation due to damage to the lateral serving the property. Therefore the <br /> entire farm is included as dry-up for all 13.5 shares dedicated to the plan in 2025. The share <br /> dedication dated February 29, 2012 remains valid and is attached. <br /> Greeley Irrigation Company Shares <br /> The Applicant has obtained a lease for a total of three (3) shares in the Greeley Irrigation <br /> Company ("GIC") owned by Pat Arnold. A share of GIC water provides the shareholder with <br />