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Colona Pit SWSP Page 6 of 13 <br /> September 30, 2025 <br /> Applicant's 2.5 shares is estimated to be about 49.1 acre-feet/year, as shown in the <br /> attached Table 3. <br /> A portion of the water diverted to irrigate the 29.2 acres property historically accrued to the <br /> Gunnison River in a form of surface and groundwater return flow. The Applicant has <br /> previously completed a delayed depletion analysis to determine the amount and timing of <br /> the groundwater return flow. According to this analysis it was determined that fifty percent <br /> (50%) of the total return flow accrues to the Uncompahgre River as surface return flow <br /> within the same month as the diversion and fifty percent (50%) accrues to the Uncompahgre <br /> River as groundwater return flow. The timing of the groundwater return flows was lagged to <br /> the Uncompahgre River using the Glover method with the following aquifer parameters: T = <br /> 50,000 gpd/ft, SY = 0.15, X = 2,000 feet, and W = 5,000 feet. <br /> After applying the 2.5 shares of Ouray Ditch water and accounting for owed return flows in <br /> replacing the out-of-priority lagged depletions, there will be 11.8 acre-feet of out-of-priority <br /> depletions remaining (Table 3, column 14). <br /> Tri-County Water <br /> The additional proposed source of replacement water for this pit during the irrigation season <br /> is water leased from the Tri-County Water Conservancy District (Tri-County). Up to 6.0 acre- <br /> feet/year of fully consumable water from Ridgway Reservoir will be used to supplement the <br /> consumptive use credits for the months of April and September (leases attached). A 1.65% <br /> transit loss will be applied to all deliveries from Ridgway Reservoir, subject to assessment <br /> and modification by the Division Engineer. This release is shown on attached Table 4. <br /> Blue Mesa Water <br /> The proposed source of replacement water for this pit during the non-irrigation season of <br /> November through March is fully consumable water released from Blue Mesa Reservoir by the <br /> U.S. Bureau of Reclamation. The Applicant has two contracts (attached) for Blue Mesa <br /> water, one for 5.0 acre-feet and another for 13.0 acre-feet. An 8.9% transit loss will be <br />