Subordination of the Aspinall Unit Water Rights: 2000 Annual Report

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FROM UGRWCD FAX NO. : 970 641 7606 Aug. 21 2002 03:55PM Pe TABLE 1 PROCEDURE TO ESTIMATE DEPLETIONS AND DIVERSIONS and —M I nil 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 withoul any other information. Coln Non- Commercial and Dhserslons and depletions are estimated at 0.44 ac-ft which is the value estimated by the Reservoir Industrial Division 4 Engineer for cormnwctal and Industrial water rights without any other information. The 0.44 ac -ft is the total use for a waiter tight with only commercial use, only industrial use, or commercial use and industrial use. Do Well and Divt3rsiats are estimated to be 0.31 ac-ft and the associated depletions 0.11 ac.ft. Springs Domestic use estimated as 120/gaVday /person with a consumptive use percentage of ss 36% (estimates used by SlMeCU). The average persons per house is estimated to be *Water .10 2.3 based On data provided by the Colorado Demography Service (see page 4 of Helton & W;Ifiameen, P.C. report "use of the upper Gunnison River Water Conservancy District Water Rights to Meet Currant and Future Needs" dated October 1997). Diversions are estimated as 2 . 3 x 120 465/(7.48u43,560) =0.31 ac and the corresponding depletions are 0.364.31=0.11ac-ffiyr_ These estimated diversions and depletion: amused for water rights with only domestic use. only municipal use, or fora right with municipal and domestic use. All Diversions records from DWR HYDROBASE. Diversions divided between water rights based an priority. Structures included in the DWR StateCU program are not included in this TEV—Reswjolf Reservoir evaporation Diversions and depletions equal to reservoir evaporation losses_ Reservoir evcporation in is primary use loss estimated as 5.6% of the reservoir storage right The factor of 5.6 wart determined ft from an analysis of 24 reservoir; that had available reservoir surface area For these reservoir the total reservoir evaporation losses was estimated as the reservoir surface area multiplied by the reservoir evaporation rape. This loss is then pro -tgted between water rights using the decreed storage amounts. Tne reservoir surface area is obtained from the DWR GIS information (CDSS website) that tabulates ma>amum water surface area. A net evaVoratjorr rate of 2.23 fast vras estim. from the avrnagc of the net evaporation rates at Taylor park Reservoir and Blue Mesa Reservoir (ken the Division 4 Engineer Accounting for Taylor park Reservoir and 61ue Mesa Reservoir). Gn Wells City of Gunnison Diversions records provided by Frank Kugel of the DWR Division 4 office. For the Municipal Use purposes of this study it is estimated that depletions are 36% of diversions (value used by StateCU). Gunnison Well No. 10 has rRponed diversions aven though the DWR water rights tabulations list this well as a conditional water right. For the purpose of this study, 4 is estimated that Gunnison Well No. 10 water right is an absolute right. Irl Non- Irrigation with no Depletions and diversions are zero because this structure was determined to have no Reservoirs irrigated acreag and irrigated acreage by the DWR as documented in the DWR no DWR diversion Irrigated acreage data in the DWR HYDROBA.sE. In addition, the DWR HYDROBASE showed zero ac -ft of records Ir2 Non- Irrigation with no Reservoirs diversion for thi. ctu Diversion records from DWR HYDROBASE. The DWR estimated no irrigated acreage irrigated acreage but DWR diversions associated with structure. Depletions are estimated to be 19% of the diversions based on depletions percentage for junior irrigation rights in StateCU (0.19 = 2,725/14,516). records I� Reservoirs Irrigation with OWR P acordss of divaraion to storage,, release from Storage, and evapordtlOn losses available records from the DWR HYDROBASE. Theca records indicate that in 2000, all or the diversions to storage Were under voter rights; senior to the Aspinsll unit water rights. This coding Is used for Vouga Reservoir, Upper McDonough Reservoir, and Lower McDonough Ira Reservoirs Irrigation with no Noecords of diversion, release or stolve available from the DWR HYDROBASE. DWR records 68580 on engineering judgment it is estimated that 50% of the water right was diverted into storage and 30 % of the water tllverled to storage was consumed for irrigation If Reservoirs Decreed for Irrigation This Code applies to spring Creek Reservo U but no longer used for Reservoir. These reservoirs onger Irrigation are decreed for irrigation b a no u--od lbr ;rr g ion purposes. Therefore, the irrigation diversions and depletions are zero ac.ft.