Prehearing Statement of the Town of Dillon

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Case No. 86CW330 Page 3 86CW329; (2) when the Applicant is diverting water from the Blue River Intake as an alternate point of diversion as approved in a separate case; or (3) when the Applicant is making diversions from the Blue River Intake under a separate plan for augmentation. 11. Accounting and Measurement: Applicant shall conduct the following accounting during any month this plan for augmentation and exchange is operated. Copies of Applicant's ongoing accounting for this augmentation plan will be provided to parties upon request. a. In order to determine the amount of water diverted and used for different uses pursuant to this plan, Applicant shall estimate the acreage of irrigated areas. The irrigated acreage as of 1991 is estimated to be 25 acres. Applicant shall provide a new estimate of irrigated acreage every (5) five years or after any calendar year in which the amount of water treated by the Applicant increases 20 percent or more over the previous year for as long as. this plan for augmentation and exchange is operated or more frequently at the option of the Applicant or direction of the Division Engineer. The annual consumptive use due to irrigation shall equal the irrigated acreage times 1.45 acre feet per irrigated acre. An 80 percent irrigation efficiency shall be used to determine the deliveries made for irrigation. Thus, the annual amount of treated water delivered for irrigation use shall be equal to the consumptive use divided by 0.80. Computed annual water deliveries for irrigation use shall be distributed according to the following monthly percentages: May, 5 percent; June, 28 percent; July, 29 percent; August, 23 percent; and September, 15 percent. These percentages are based on a Modified Blaney-Criddle analysis of lawn grass, using data from the Dillon weather station. b. The Applicant shall determine in-house use return flows on the following basis: 1) During the months October through April, actual metered deliveries shall constitute in-house use; 2) For May through September, in-house use shall equal actual metered deliveries minus irrigation deliveries as determined in paragraph a. above, unless computed irrigation deliveries are greater than actual gross metered deliveries in any given month, in which case, in-house use for that month shall equal the minimum actual monthly use during any given month of the preceding year and irrigation deliveries shall equal the actual metered use minus the in-house uses; 3) Ninety five-percent of the water delivered for in-house use shall be taken as a credit returning to the Blue River at the Joint Authority Wastewater Treatment Plant. c. Fifteen percent (15%) of the water delivered for irrigation will return to the Blue River drainage as a result of deep percolation. Using the monthly records compiled in accordance with the above provisions,