2025-09-18_HYDROLOGY - M1999034 - Laserfiche WebLink

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Holcim South Platte Combined SWSP September 18, 2025 Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, 5475, 5829, &t 6243 Page 13 of 37 1996CW658, all GIC direct flow deliveries incur an immediate surface return flow obligation of 23.7%, and all Fossil Creek deliveries incur an immediate surface return flow obligation of 20.1%. The estimated consumptive use credit is therefore 15.50 acre-feet per share for GIC direct flow water, and 0.95 acre-feet per share for Fossil Creek Reservoir water. For the purposes of this SWSP, Holcim is assuming that the GIC's 60 preferred rights in Fossil Creek Reservoir will not be available to GIC during WY2025. Excluding the Fossil Creek Reservoir component of the GIC deliveries, the projected farm headgate delivery of the 3 shares will equal 60.93 acre-feet per year (3 shares x 20.31 acre-feet/share), with a return flow obligation of 27.60 acre-feet. The total consumptive use credit for the 3 shares is therefore projected to equal 33.33 acre-feet for 2025. The GIC shares will be delivered back to the river through the 23rd Avenue and Fourth Street Return Station. Bucklen Equipment Company Lease The Applicant executed an agreement with Bucklen Equipment Co., Inc. for the lease of excess augmentation credits from the Bucklen Pit SWSP (WDID 0302538) during the period of April through October 2025. A copy of the lease, dated November 18, 2024, is attached. The excess augmentation credits will be generated from six (6) Greeley Irrigation Company shares owned by the Bucklen Equipment Co., Inc. The return flow obligations associated with the use of the six Bucklen GIC shares are counted as a depletion in and will be replaced under the Bucklen Pit SWSP. After use in the Bucklen Pit SWSP, the shares are projected to produce a total of 70.70 acre-feet of excess credits during the 2025 irrigation season. According to the agreement, Bucklen Equipment Co. will lease to Holcim as needed any excess augmentation credit available during the 2025 irrigation season for use. The Bucklen GIC shares will be delivered to the Cache la Poudre River at the 23rd Avenue and Fourth Street Return Station (WDID 0302318). City of Greeley Lease Holcim has entered into a water lease agreement with the City of Greeley under which Greeley will provide a total of 36 acre-feet of fully consumable water for replacement purposes in April and October 2025. A copy of the lease agreement, dated February 3, 2025, is attached. The water is discharged to the Cache la Poudre River from the City's wastewater treatment plant.