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We have already noted the exceptional features of this section -the great concentration of demand in a short, <br />compact area, the distinctly interstate scope and character of water distribution, with Wyoming <br />appropriations serving Nebraska uses, with the dependence of Nebraska canals on Wyoming diversions, <br />with the joint use of canals to serve both States. There has been no effective interstate administration. The <br />need to treat the section as an administrative unit without regard to state lines seems apparent. The Special <br />Master concluded that the most feasible method of apportionment would be a distribution of natural flow <br />on a percentage of daily flow basis. <br />If a division of flow were made according to total acreage, total requirements, or acreage or requirements of <br />senior and junior appropriators, it would be as follows: [325 U.S. 589, 641] [] Wyoming Nebraska[] <br />Total Acreage 27% 73% Total Requirement in Acre feet 23% 77% Total Senior Acreage 24% 76% Total <br />Junior Acreage 28% 72% Total Acre feet Requirement, Senior Acreage 22% 78% Total Acre feet <br />Requirement, Junior Acreage 23% 77% [] <br />If the river flow is separated according to priority groups, water values expressed in second feet, and it is <br />assumed that each canal diverts, in order of priority, the maximum limit of one second foot for each 70 <br />acres, the result is as follows: <br />Acreage Acre Feet Priority Basis Basis Flow Basis Percentages 24 % -76% 22 % -78% Wyo. Neb. Wyo. Neb. <br />Wyo. Neb. Wyo. Neb. [] <br />1. Up to 103 second feet 103 0 100 0 24 79 23 80 2.103 to 1.027 (924) 0 924 222 702 203 721 <br />Cumulative Totals 103 924 10 90 246 702 203 7213. 1,027 to 1,121 (94) 94 0 23 71 <br />Cumulative Totals 197 924 18 82 269 852 247 874 4. 1,121 to <br />1,328 (207) 0 207 50 157 46 161 Cumulative Totals 197 1,131 15 85 <br />319 1,009 293 1, 035 5. 1.328 to 1,494 (166) 166 0 40 126 37 129 <br />Cumulative Totals 363 1,13124 76 359 1,135 330 1, 164 6. 1,494 TO 1,513 (19) 0 19 5 14 4 15 <br />Cumulative Totals 363 1,150 24 76 364 1,149 334 1, 179 7. 1,513 TO 1,526 13 0 <br />3 103 10 _ _ _ _ _ Cumulative Totals 376 1,150 25 57 367 1,159 337 1, 189 28- <br />72% 23 % -77% 8. 1,526 to 4,382 (2858) 801 2,057 28 72 690 2,168 629 2, 229 - - - - -- <br />Grand Totals 1,177 3,207 27 73 1,057 3,327 966 3,41 4,384 4,384 4,384 27 % -73% 27 % -73% <br />1 to 8 inclusive 1177 3207 27 73 1184 3200 1008 3376 [325 U.S. 589, <br />642] It is thus apparent that whether a division be proportioned to total acreage or to tota diversion <br />requirements or be made on a strict priority basis, there would be no substantial difference except as to the <br />first 1500 second feet. The maximum difference as to other water would be 6 %. <br />Wyoming argues for a mass allocation, e.g. 705,000 acre feet to be allocated to Nebraska for diversion in <br />this section during the irrigation season for Nebraska lands. The Special Master rejected that method. He <br />concluded that it was based on an assumption of dependability of flow which would be bound to result in <br />injustice to one or other of the States; that it apportioned not only natural flow but also storage water, the <br />disposition of which is governed by contracts. We have already considered Wyoming's exception that <br />storage water should have been included in the allocation. We have also considered the other phases of her <br />argument in favor of mass allocation. We repeat that the inadequacy of the supply is too clear to permit <br />adoption of Wyoming's formula. <br />The United States and Nebraska claim that the adoption of a priority schedule in this section would achieve <br />the most equitable results. On a 25- 75 percentage basis, Nebraska would get 75 second feet out of the first <br />100, to none of which she would be entitled in times of an extreme low flow; Wyoming would get 225 <br />second feet out of the next 900 to none of which she would be entitled on a priority basis. A priority basis <br />would only coincide with the percentage basis when the supply available was 400 second feet or 1500 <br />second feet. If the supply were 800 second feet, a priority basis would give Wyoming 103 second feet and <br />Nebraska the remaining 697 second feet. On the 25 -75 percentage basis, Wyoming would receive 200 <br />second feet and Nebraska 600 second feet. It is argued that the unfairness of the proposed apportionment is <br />demonstrated by the record of the low flow of the river in this section during the irrigation season in 1931- <br />1940 period. [325 U.S. 589, 643] Thus in 1932 the flow never rose above 1500 second feet after August <br />10th. In the 1934 season it rose above 1500 second feet only once after June 10th. And in the 1936 season it <br />