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Table 4 estimates the amount of water that on average is delivered to the ranch. The applicant owns a complete interest in Fish Ditch. Since the applicant owns 70 shares out of a total of 7,152.825 shares on the Rio Grande Canal, it was assumed that he has historically received a proportionate amount of the total water. A ditch conveyance efficiency of 80°/D for Rio Grande Canal was assumed to account for ditch losses between the ditch head gate and the ranch. A ditch conveyance efficiency of 95% was assumed for the Fish Ditch since the ranch is located just two miles from the ditch head gate and is in close proximity to the river. Run Cn arxteaatln fo r Dacn Flw Dnarxteaatlc a At Farm Nm gata Arerage Average Average Drys In Dan In Dacll Flnt L1st Drya Dry Wat Avrage Dry Yaar Wat Year Awraga Dacn Ownennlp Donrayenca Run Run Water Water Waer Mnual Mnual Mnual Dslry Name In Dncn Emcienry Dry Dry DanIM Year Yeu Flow Flow Flaw Flow x x a a a a a xre x x na Fen Dan too aox ssoox asst tlWlt uT ss ZIT ter: saT sstz 5as R„Gnnau a~ai osex rooox atnt tarn siB tea ]as rata at] seat ]ao Ba r TOTty I e t OSN: De/la a0 7 Bt ]B.6 T10 a]53 Table 4. Historic Flow Characteristics of Surface Water Rights Owned by Applicant On average, it is estimated that these surface water supplies provide 3,026 acre-ft per year to the ranch. Even in the driest year on record, the estimated combined supply is 720 acre-ft/yr which is sufficient to replace out-of-priority depletions. The entire ranch encompasses 2,800 acres. Figure 3 shows a satellite image of the entire ranch for 1998. It is estimated that 2,017 acres of the ranch have historically been irrigated by surface and ground water supplies. Figure 4 shows a 1993 aerial photograph of the ranch delineating the irrigated parcels. Additional aerial photographs are contained in Appendix C. The majority of the ranch has historically been in irrigated pasture. Some alfalfa has also been grown. For this analysis, a net imgation requirement of 24. I inches per year has been used for alfalfa. The irrigated pasture was split into three consumptive use groups. Irrigated pasture with a full water supply has historically used 18 inches per year. Imgated pasture with an average water supply has historically used 16 inches per year. ]rrigated pasture with a poor water supply has used 8 inches per year. The efficacy of irrigation on the pasture was evaluated by examining aerial photographs and by field examination. The size and historic crop consumptive use associated with each imgated parcel on the ranch is summarized in Table 5.