2012-11-20_HYDROLOGY - M1982131 - Laserfiche WebLink

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Mr. Jared Dains Bucklen SWSP November 20, 2012 Page 4 terms and conditions decreed in case no. 1996CW658, including monthly and annual volumetric limits on water deliveries and monthly return flow requirements. The decree in case no. 1996CW658 found that 519.7 shares were used to irrigate 3,501 acres with an average historical consumptive use of 5,358 acre -feet per year, which yields an average consumptive use credit of 10.31 acre -feet per share (5,358 acre- feet/519.7 shares). Based on the above, the 5 shares to be used in this plan results in a consumptive use credit of approximately 51 acre -feet per year (10.31 acre -feet per share x 5 shares). The Applicant owns a total of six GIC shares. One of the Applicant's shares was associated with Farm W -49, which is now dried up because it is part of the Bucklen Pit. The other five shares were referred to as "floating shares" in case no. 1996CW658. In accordance with paragraph 19 of case no. 1996CW658 the lands historically irrigated by the "floating shares" are reported to have already been dried up and are no longer irrigated. In paragraph 6.7.4 of the decree in case no. 1996CW658, future farm headgate deliveries of the 67.75 shares were limited to 1,712 acre -feet per year (25.26 acre -feet per share) and 12,631 acre - feet (186.43 acre -feet per share) in any consecutive 10 year period. Deliveries of the 5 shares of GIC water under this plan must comply with these limits. The historical return flows shall be maintained in accordance with the return flow factors identified in case no. 1996CW658. The return flows associated with the delivery of Fossil Creek Reservoir water that is attributable to the 5 GIC shares shall also be maintained in accordance with the surface and subsurface factors decreed in case nos. 1996CW658. Pursuant to paragraph 6.7.6 of case no. 1996CW658, the subsurface component of the return flow obligation will be calculated by multiplying the 5 year running average annual farm headgate deliveries of GIC direct flow water and Fossil Creek Reservoir water. As WY 2009 was the first year that GIC shares were used for augmentation purposes at this pit, the subsurface return flow obligations will only be based on the average of WY 2009, 2010, 2011, and 2012 deliveries. The estimated subsurface return flow obligations for the water year 2013 for the GIC direct deliveries and Fossil Creek Reservoir deliveries are 13.71 acre -feet and 0.00 acre -feet, respectively (Table 4). For projections of WY 2013 deliveries, the Applicant used a dry-year yield of 17.75 acre -feet per share. This value was taken from decree 03CW348, a change case involving similar GIC shares. As specified in case no. 96CW658, all deliveries of GIC water incur an immediate surface return flow obligation of 23.7 %. In total, each of the five GIC shares are expected to have a net credit to the river of 13.54 acre -feet before the subsurface return flow obligations are deducted. City of Aurora Lease During the period of November 2012 through March 2013, a lease of 19.53 acre -feet of fully consumable water provided by the City of Aurora ( "Aurora ") will be used to make replacements during the non - irrigation season. Aurora confirmed the daily delivery schedule via an October 30, 2012 letter to the Applicant's consultant (attached). The releases will be made from the Metro Waste Water Reclamation Facility (WDID 0200700) located in Denver on the South Platte River approximately 66 miles upstream from the Cache la Poudre confluence. Therefore a 16.5% (0.25% per mile) river transit loss will be assessed on all deliveries. During the winter it is possible for a call to be placed on the Evans Number 2 ditch for a Milton Reservoir call, or a call at the Western, either of which could potentially sweep the river. It is the Applicants responsibility to track the daily call and make arrangements as necessary to ensure this water is bypassed or otherwise delivered to the Cache la Poudre and South Platte River confluence. The District 3 Water Commissioner has confirmed there is no call in the winter for the stretch of the Cache la Poudre River between the