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<br />P7r. Jack Haines <br />February 13, 1;76 <br />Page Three <br />A 1954 appropriation water right and a date of adjudication <br />in 1976 or 1977, assuming action is talon to adjudicate the <br />rights, will be very junior. The rights are. not, by them- <br />selves, considered adequate to use for replacement water to <br />offset the open lake evaporation from 'the :Wining operation. <br />Initial contact has been made with GASP (Ground Water <br />Appropriators of the South Platte Basin) and it is anticipated <br />that augmentation water will be pro-sided through this organ- <br />ization to prevent injury to downstream water rights. <br />WATER USE <br />Historical <br />As discussed previously irrigation water was used on tl~e <br />property to irrigate approximately 65 acres of alfalfa and <br />55 acres of pasture. The consumptive use of irrigation water, <br />as determined by the method outlined in the Soil Conservat_on <br />Service Technical Ttelease No. 21 is 1.66 feet for alfalfa <br />and 1.33 feet for pasture. Since the pasture is on the low <br />lying land adjacent to the river some of the water supply is <br />likely to have come from sub-surface irrigation. _It is_ <br />assumed that 508 of the water requirement for pasture was <br />provided by surface application. <br />Assuminy water was physically applied when required to <br />sustain crop growth, the to+-1 irrigation consumptive use <br />for alfalfa in an average year was 108 acr _.et and for <br />the pasture was 37 acre-feet. The open cvater surface of the <br />sumps, ap,_~::imately 3.5 acres, had a net evaporation after <br />deduction of precipitation of 2.16 feet, or a total of 7.6 <br />acre-feet per year. The total irrigation water use plus <br />evaporation from open water surface was 153 acre-feet per year.J <br />Present <br />There is no irrigation of any of the property at the present <br />time and, therefore, no irrigation consumptive use. Evarora- I <br />tion from the 15.6 acres of open water surface totals <br />approximately 34 acre-feet per year. <br />Future <br />The maximum amount of open water surface, if the total <br />amount of evaporation loss is not to exceed the historic <br />~ water use on the property, is 71 acres. A reclamation plan <br />~le ~ should be d welopPd which limits the open water surface area <br />to this amount. At the present time one unit of GASP will <br />provide 100 acre-feet of replacement water, or an amount <br />sufficient to replace the evaporation from 46.3 acres of <br />open water. <br />,~ <br />