Subordination of the Wayne N. Aspinall Unit Water Rights within the Upper Gunnison Basin: Annual Report (2)

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TABLE 1 PROCEDURE TO ESTIMATE DEPLETIONS AND DIVERSIONS Code Structure Type of Use Procedure used to Estimate Diversions and Depletions (1) 2) (3 ) (4 Aug All Augmentation Diversions and depletions are estimated at 0.44 ac -ft which is the value estimated by the Division 4 Engineer for augmentation water rights without any other information. CB Ditch Camp Bird Ditch The first 0.15 cfs of diversions are for irrigation. The next 2.5 cfs are for recreation and the remainder are undecreed diversions. The DWR estimated 34 acres are irrigated at this structure so it is estimated that 40% of the irrigation diversions are consumed. CI Non- Commercial and Diversions and depletions are estimated at 0.44 ac -ft which is the value Reservoir Industrial estimated by the Division 4 Engineer for commercial and industrial water rights without any other information. The 0.44 ac-ft is the total use for a water right with only commercial use, only industrial use, or commercial use and industrial use. Do Well and Domestic No DWR records are available for these water rights. Indoor domestic water Springs use is estimated to be 100 gallons/day /person with an average of 3.5 people per household which results in a diversion rate of 3.5x100x365/(7.48x43,560) =0.392 ac -ft. The associated depletions are estimated to be 10% of the diversions or 0.104.392=0.039 ac-ft. The indoor diversion and depletion rates were specked by Mr. Wayne Schieldt, Division 4 Engineer. The outdoor water use is estimated using a lawn area of 2,000 square feet and a crop irrigation requirement for bluegrass in the Upper Gunnison Basin of 1.72 feet. Using an irrigation efficiency of 75% results in a diverison amount of 1.72x2,000/(43560x0.75) =0.105 ac -ft. Using a spray loss of 5% results in a consumptive use of outdoor diversions of 0.105x(0.75 +0.05) =0.084 ao-ft. The total indoor and outdoor diversions are 0.392 +0.105 =0.50 ac-ft (rounded to nearest 1 /100th acre - foot). The total indoor and outdoor depletions are 0.039 +0.084 =0.12 ac -ft rounded to the nearest 1 /100th acre-foot). DO All All Diversions records from DWR HYDROBASE. Structures have only water rights junior to Aspinall Unit rights. Diversions pro -rated between water rights based on decreed amounts. Structures included in the DWR StateCU program are not included in this category. Dv2 All All Diversions records from DWR HYDROBASE. Structures have only water rights junior to Aspinall Unit rights except that diversions exceed decreed amounts. Diversions prorated between junior water rights based on priority. Diversions limited to amount decreed to junior water rights. Structures included in the DWR StateCU program are not included in this category. DO All All Diversions records from DWR HYDROBASE. Structures that have rights junior and senior to the Aspinall Unit rights. Diversions were first allocated to senior water rights and then remainder was pro -rated to junior water rights based on decreed amounts. Structures included in the DWR StateCU program are not included in this category. Dv4 All All Diversions records from DWR HYDROBASE infrequent monitored water diversion report. Based on available monthly records; all diversions were estimated to be made by the water rights at the structure that are senior to the Aspinall Unit rights. Dv5 All All Diversions records from DWR HYDROBASE infrequent monitored water diversion report. Based on available monthly records; all diversions were estimated to be made by the water rights at the structure that are junior to the Aspinall Unit rights. Helton & Wlliamsen, P.C. Page 5 2001 Annual Report.xls, Table 1, 12/1B/2002, rlh