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9 0628 When water is used for an industrial or non-irrigation p~rpose, the amount of water actually consumed can be measured. This cannot be done for irrigation uses. The Tribes and State agreed in Section C of Article III on a consumptive use for irrigation which would be conclusively established by Section C of Article III: 81.8 acre-feet per acre per year for full service irrigation and 0.~8 acre-feet per acre per year for partial service irrigation. Thus, if 100,000.acres are actually in full service irrigation by tribal water users in a particular year, the consumptive use is conclusively deemed to be 180,000 acre-feet for that year. No measurement of actual consumptive u~e is made for irrigation uses. (An identical formula is provided for user!Oof rights established under state law by Article IV B (3).) Article III D provides that the Tribes can put water to use for anv purpose on the Reservation, without regard to whether tha~se is beneficial under state law and without observing anv other state law restrictions, !? long as the use of water on the reservation is not wasteful. Water can be freely shifted within the Reservation from one purpose to another, such as from irrigi~ion to industrial or mineral development, or recreation. Uses outside the Reservation 7Such consumptive use is defined by Article 11(5). Its measurement is "the quantity of water diverted less quantity of reusable return flow within the State." is also defined by Article II (22) . the Reusable 8This term is defined by Article II (11). 9This term is defined by Article II (17). 10If reservoirs are constructed in the future for conservation storage, evaporation is counted as a consumptive use in the manner set forth in Article 11(4). The evaporation from any reservoir presently in operat.io.n is not counted. (Tr. Feb. 27, 1985, pp. 52-56). 11 E.g., Tr. Sept. 24, 19B1, p. 32; Tr. Feb. 27, 1985, p. 61. The term ~wasteful" is defined in Article II (28) as "the unreasonable loss of water through the design or negligent operation of a diversion or of a water distribution facility." , 12 E.g., Tr. Sept. 24, 1981, pp. 29-32.