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<br />.. <br />~. <br /> <br />. <br /> <br />.-.-/ <br /> <br />-7- <br /> <br />Year <br /> <br />Historic Transmountain <br />Diversion, May-Sept. <br />(Acre Feet). <br /> <br />Curtailment Dle <br />to Maintenance <br />of Base flow <br />(Acre Feet) <br /> <br />1919 <br />1931 <br />1934 <br />1936 <br />1937 <br />1939 <br />1942 <br />1943 <br />194B <br /> <br />17,496 <br />16,210 <br />16,3S1 <br />34,469 <br />27,994 <br />27,909 <br />18,$74 <br />IB ,.691 ' <br />IB,$69 <br /> <br />250 <br />IBO <br />1,,630 <br />115 <br />+40 <br />640 <br />35 <br />150 <br />50 <br /> <br />In 3 of the 9 years the transbasin exports were considerably in excess of <br /> <br />19,B75 acre feet. In 1919 the water supply was such that had maximum poSSible <br /> <br />export diversions been made in July, and historic diversions for the other <br /> <br />months of the May-September period, the total export would have been IB,OOO <br /> <br />acre feet with a maintained flow at Glendevey of 30 second feet until July <br /> <br />2$. In 1931, under the same assumptions, the total exports would have 'been <br /> <br />at least 17,SOO acre: feet. ;iith a small increase in the historic diversion rate <br />in other months of the season total exports of 19,785 would have been possible <br /> <br />in either year, <br /> <br />The most serious curtailment \vould have happened in 1934, which was the <br />lowest year of record between 1915 and 1949. HO\'1ever, studies indicate that <br /> <br />had the river bee~ administered on a strict priority basis in that year, the <br /> <br />transbasin diversions could possibly have been reduced about 3300 acre feet. <br /> <br />For the years from 1942 to 1949, when a diversion agreement has been in <br /> <br />effect, it may be seen that the maintenance of the base flow would have <br /> <br />