OCR Text |
Show 6. If the methods of determining the consumptive use, as outlined in your letter, are followed it seems to us that this will involve the extension of the investigation to cover all the irrigation systems in the valley as the return flow from all these systems enters the same stream and the measurement of this return flow appears to be essential. 7. If the project bordered on the river, as in an ideal case, we can readily understand how the necessary data could be obtained without much complication, but in the case of the Grand Valley project where no part of the irrigated land borders on the river, the difficulties of applying your scheme would appear to be unsurmountable. We could, of course, make a determination based upon the quantity of water delivered at the upper end of the project, the quantity wasted, and the quantity discharged through natural and artificial wasteways. Under this method, however, it would be impossible to separate the consumptive use from the underground flow. The conditions relative to ground water, as above explained, also offer very serious difficulties. On a project such as the Uncompahgre many of the difficulties which apply on the Grand Valley project do not exist, inasmuch as that project covers practically the entire valley. 8. We would be only too glad to undertake this investigation and have the personnel available to do the work. It is our judgment, however, that such information as we could obtain here would be of small value in comparison with the expense involved and we therefore hesitate to go |
Source |
Original book: [State of Arizona, complainant v. State of California, Palo Verde Irrigation District, Coachella Valley County Water District, Metropolitan Water District of Southern California, City of Los Angeles, California, City of San Diego, California, and County of San Diego, California, defendants, United States of America, State of Nevada, State of New Mexico, State of Utah, interveners] : California exhibits. |