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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, &t 6243 Page 17 of 37 <br /> the Applicant is not required to consider evaporative depletions of water delivered to the <br /> Lighthouse Cove Pond for recharge. <br /> The lagged accretions from the Lighthouse Cove Pond were estimated by the Applicant's <br /> consultant using the AWAS stream depletion model with the following parameters: <br /> • Distance from the recharge pond centroid to the river (X) = 3,450 ft <br /> • Alluvial aquifer width (W) 9,300 ft <br /> • Specific yield (S) = 0.2 <br /> • Transmissivity (T) =50,000 (gpd/ft) <br /> The lagged accretions to the confluence of the St. Vrain Creek and Boulder Creek are <br /> projected to total 58.66 acre-feet during this plan period based on the Applicant's projected <br /> delivery of 0.5 acre-feet of Smith 6t Emmons water per day or the monthly volumetric limit, <br /> whichever was less, for the period of May 1-October 31 . After accounting for return flow <br /> obligations, net recharge credit was projected to total 10.80 acre-feet for this plan period. <br /> South Platte Mainstem <br /> Projected <br /> Replacement Sources 2025 Yield Comments <br /> (acre-feet) <br /> Centennial 30.00 Perpetual lease <br /> Available throughout the year-perpetual <br /> Westminster 1998 265.24 lease; 265.24 acre-feet proposed to be <br /> used in 2025 <br /> City of Aurora 158 Annual lease with City of Aurora <br /> Thornton Effluent 10.53 November - March only <br /> Fulton Ditch 106.06 96 shares total; 84 shares to be used in <br /> 2025 <br /> City of Arvada 66.00 Lease July - September only <br /> Patterson Ditch 31.87 8 shares to be used in 2025 <br /> Denver Julesburg Water 7.00 Lease recharge credits from 12CW179 <br /> Resources Partners, LLC <br />