CT2015-057 Feasibility Study - Laserfiche WebLink

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Assuming a ditch loss of 15 percent and farm efficiency of 50 percent, approximately 4.25 acre-feet of consumptive use credit might be expected from these shares. These values are used in this report. Alternative No. 3 - Whitney Irrigating Ditch Company Background The Whitney Ditch Irrigating Company is a small mutual ditch company that operates near the Town of Windsor under two priorities originally decreed in Case No. CA320. Both priorities are fairly senior; the most senior right being Priority No. 7, which provides the majority of the water in Whitney Ditch. There are a total of 320 active shares in the Whitney Ditch. Table 9-Whitney Ditch Information Priority Adjudication Appropriation Decreed Flow Rate No: Date Date (cfs) 7 April 11, 1882 September 1, 1862 48.23 48 April 11, 1882 September 10, 1871 12.95 Historical Service Area The Whitney Ditch diverts water from the north side of the Cache la Poudre River near the NW corner of the SE Y4 of Section 19, T6N, R67W, in the 6th P.M. in Water District 3. From its point of diversion, the Whitney Ditch has historically serviced around 4,000 acres located along the north side of the Cache la Poudre River to the northwest edge of Greeley. Water Availability The Whitney Ditch has historically diverted from April through September with reduced diversions in October. In 1995, the Whitney Ditch diverted water as early as March. Prior change of use cases have decreed the water available from April through October. Delivery and Consumptive Use Pro-rata river headgate diversion records between the years 1950 and 1998 averaged 33.4 acre-feet per share. Assuming a ditch loss of 15 percent, pro-rata farm headgate deliveries were 28.4 acre-feet per share. Assuming a farm efficiency of 50 percent, the consumptive use credit is estimated to be 14.0 acre-feet per share. These estimates are consistent with the prior change cases and are the values used in this report.