C153808 Feasibility Study - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I consumptive use factor decreed in 85CW38 to the long-term average annual diversion of 1,055 acre- feet would result in a long-term average annual consumptive use credit of 601 acre-feet. The average replacement credits available during the irrigation season are estimated to be 795 acre-feet. Replacement credits exceed consumptive use because of lagged return flows. The difference between the two values, 194 acre-feet, is the estimated winter return flow obligation. The average replacement credit of 795 acre-feet during the irrigation season (April through October) would on average be more than adequate to replace the estimated future well depletions occurring on Fountain Creek between April and October of 579 acre-feet. Excess Liston and Love replacement credits not utilized on Fountain Creek, would be used on the Arkansas River main stem between Pueblo Reservoir and John Martin Reservoir to offset well depletions in this reach. Excess Liston and Love Ditch credits available between April and October on average will be 216 acre-feet (795-579) using estimated future depletions. As with the Lock Ditch, if AGUA utilizes the Liston and Love as a replacement source, winter return flow obligations will need to be replaced to Fountain Creek during the months of November through March. Winter return flow obligations for the Liston and Love Ditch have not been quantified, but could be estimated using the same procedure used to estimate winter return flow obligations for the Robinson Ditch as decreed in 86CW31. This estimate would result in average winter return flow obligation of 24.4 percent of April through October net stream depletions or 194 acre-feet. Purchase of a three-quarter interest in the Liston and Love Ditch would require AGUA to change the water right from irrigation to augmentation use, build an augmentation station, pay for O&M associated with the augmentation station, and lease water to replace winter return flow obligations. The Venezia Family has not established a selling price for the Liston and Love Ditch. Therefore, the $2,143 per acre-foot of average consumptive use price previously used to estimate the cost of Lock Ditch water was multiplied by the 601 acre-feet long-term average annual consumptive use yield, to estimate a purchase price of $1,287,900 for the three-quarter interest in the Liston and Love Ditch. The cost to construct an augmentation station for the Liston and Love Ditch was assumed the same as the cost to construct the Lock Ditch augmentation station or $15,000. The annual O&M cost to maintain the augmentation station is estimated to be $2,500 for a part time superintendent to maintain -31-