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Show 28 PROBLEMS OF IMPERIAL VALLEY AND VICINITY. formation before final plans are decided upon. The investigations so far made have located the dam within such narrow limits that further drilling can be confined to the area to be occupied by the base of the dam and the cofferdams. 26. We recommend that as a preliminary to the final plans for the dam and for the adoption of a method of river diversion during construction, the area below the river level under the dam and cofferdams should be further explored by drilling to bed rock at least 35 holes, so distributed as to cover the entire area of the river channel under the base of the dam and cofferdams and to permit of further exploration by intermediate drilling when construction has been finally determined. A. J. Wiley. James Munn. J. L. Savage. W. R. Young. Supplementary Report on Power Development. The foregoing report of Board of Engineers, dated May 26, 1921, contains statement of power available on certain assumptions that do not cover all possible contingencies. On request they have made a supplemental report designed to show the maximum amount'of firm power that could be developed by regulating the water for this purpose only. The results and the assumptions upon which they are Dased are given in the following supplemental report. . Both these reports are preliminary, and are not to be understood as final commitments to the heights of dam therein treated, or to any details of design. It seems advisable at present tentatively to adopt a flow line about contour 1250, as being the highest possible without materially affecting valuable development in the valley of Muddy Creek, and yet high enough to meet the needs of storage at this point and to develop sufficient power to pay for it. Denver, Colo., October 26, 1921. From: Board of Engineers. To: Chief engineer. Subject: Supplementary report on Boulder Canyon Dam, Colorado River. 1. Reference is made to the following: Board report of May 26, 1921, on Boulder Canyon Dam, Colorado River. Letter of July 8, 1921, from director to chief engineer; subject, " Report of Board of Engineers on Boulder Canyon Dam." Letter of July 13, 1921, from chief engineer to director, same subject. Letter of October 21, 1921, from director to chief engineer, same subject. 2. Complying with the director's suggestion as expressed in .his letter to you dated October 21, 1921, the undersigned Board of Engineers has given further consideration to the subject of power development in connection with the Boulder Canyon reservoir, and it js desired to amend certain paragraphs of the report of May 26, 1921. These paragraphs are quoted below for convenient reference: |
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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] : |