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land. It is anticipated that diversion for the balance of the proj ect will probably be at the rate of about 5 acre-feet per acre. In my opinion return flow from the Jatter units of the project will be recovered to an extent such that consumptive use on that portion of 'the proj ect will be around 3 acre-feet per acre. 'In the case of 'the first unit, however, the return will not be recoverable for use within the United States excepting only as a small part thereof may become available for the future uses for Yuma Valley, and consequently it will probably be in order to make some revisions in the estimated areas to be developed or in the amounts of water 'lO be utilized.' "Now, that is my authority for the diversion demand, and Mr. Riter, who will follow me, is wiLh the Bureau of Reclamation and will support this. In other words, I fete as you did, Senator, particularly from the fact that the water must be pumped, that the diversion would be held at as low a quantity as possible. However, the Bureau of Reclamation engineers are intimately familiar with the area, they had had long experience in matters of this kind and I am relying on their conclusion. "Senator McFARLAND. Now, as to the 240,000 acre-feet of water returned, that will be pretty good water, will it not? "Mr. TIPTON. That is correct. "Senator McFARLAND. That is, that would be reusable, except for the fact that it goes ilTtO the stream too low to be used? "Mr. TIPTON. That is correct, sir. Some of il still could be pumped to the All-American Canal. * * * "Mr. TIPTON. . . "To clear up just onc question, I have been explaining one assumed condition of development in Arizona, which is not the one which formed the basis of Mr. Lowry's testimony. "The CHAIRMAN. All right. Go ahead on your return flow. "Mr. TIPTON. Yes, sir. Now, getting bacJ~ to Senator McFarland's question again, the next itcm, the estimated return from the Phoenix area, is 406,000 acre-feet. Adding those up makes the 806,000 acre- feet of return flow. That docs not include de silting water. "Senator McFARLAND. 406,000 acre-feet? "Mr. TIPTON. Yes, sir. "Senator McFARLAND. That is the one I may be wanting to quarrel with you on. "Mr. TIPTON. Now, before you start quarrcling, I will make my explanation; then, if we have any quarrel-- "Senator McFARLAND. You in a way cut me out of this 380,000 because you havc not gOt a chance of reusing il. -20-