2018-01-16_HYDROLOGY - M1996060 - Laserfiche WebLink

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Poudre Pits Combined SWSP January 16, 2018 Plan IDs 3218, 3589 Ft 4585 Page 6 of 10 calculated based upon a percentage of the actual monthly deliveries and winter return flows will be calculated based upon the total deliveries from the previous irrigation season as decreed in case no. 2008CW65. Of the 84 acres to be dried up under this SWSP, 58.2 acres (69.3%, equivalent to 4.85 shares) are located within Zone 2-A of the 2008CW65 decree and the remaining 25.8 acres (30.7%, equivalent to 2.15 shares) are located within Zone 2-B of 2008CW65 decree (see Figure 1). The decreed monthly return flow percentages for Zones 2-A and 2-13 are shown on attached Table 7, columns 4 through 7. For this plan period, the total consumptive use attributable to the 7 shares equals 96.19 acre-feet. The 7 Whitney Ditch shares will be diverted at the Tigges farm headgate, delivered to the mine site, measured, and returned directly to the Poudre River. The water will be measured through a turnout in the Whitney Ditch equipped with a Parshall flume that is located above Lake Shiloh (aka the Roberts Pit). The water delivered to the waste ditch (WDID 0302904) will flow south directly to the river without passing through any ponds. All measurements must be made and recorded to the satisfaction of the water commissioner. During months where the projected diversions will exceed the mining and operational depletions and the monthly return flow attributed to these shares, the excess water will be diverted into the unlined middle ponds on the Tigges site where it will recharge the ground water and create lagged accretions. It is projected that this will occur from April through September of this plan period with a net amount of 27.25 acre-feet being recharged. Recharge is lagged to the river using the same parameters as the Tigges depletions and will result in a lagged accretion of 23.74 acre-feet during this approval period (note that this amount includes accretions from past deliveries to recharge). The 7 Whitney Ditch shares are insufficient to provide replacement during the months of January, February, June, and from September through December of 2018. To cover these months the Applicant has obtained a lease with the Ground Water Management Subdistrict of the Central Colorado Water Conservancy District ("Central") for 49.92 acre-feet of Central's fully consumable storage and direct flow water rights in the Cache la Poudre basin. The term of the lease is January 1, 2018 through December 31, 2018. A copy of the signed lease, dated January 16, 2018, is attached. Due to free river conditions that have occurred in the first half of January and are expected to continue through the end of the month, the lease does not allocate any replacement water to the month of January. Should replacement water be required during January 2018, the Applicant is responsible for modifying their delivery schedule to ensure all depletions are replaced in time, location, and amount. Central has water in storage in Siebring Reservoir (WDID 0303803), 83rd Avenue Reservoir (WDID 0303408), and La Poudre Reservoir (WDID 0303377). Siebring Reservoir and 83rd Avenue Reservoir are located in Section 31, Township 6 North, Range 66 West of the 6th P.M., across the Cache la Poudre River from the Firestein/Tigges pit (M-1996-060). La Poudre Reservoir is located within the boundaries of La Poudre Aggregate Mine (M-1983-090) in Section 19, Township 6 North, Range 67 West of the 6" P.M. If the Whitney Ditch or B.H. Eaton Ditch are sweeping the river, Central lease water from La Poudre Reservoir can only be used to cover the depletions from the La Poudre and North La Poudre Pits and the Central lease water from Siebring Reservoir and 83rd Avenue Reservoir can only be used to replace depletions from the Firestein/Tigges site. Conveyance loss for delivery of the augmentation water referenced above is subject to assessment and modification as determined by the division engineer. Office of the State Engineer 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 www. water. state. co. us