AZ vs. CA:09 California Exhibits, Vol. IX; Nos. 400-457

page 5

SUPPLEMENT. Paragraph 4. Under the plan of diversion through clarifiers, the ¦ point of diversion is to be located on the right hand or western ^ bank of the Colorado River 2389 feet N. 75° 08' 00" W. of the S.E. corner of Sec. 16, Tp. 11 N., R. 18 W., G. &¦ S.H.M., Arizona, being within the (unsurveyed) S.W.£, S.E.4, of Section 3. Tp. 2 N., R. 27 E., S.B.M., in the County of San Bernardino, California. Under the alternate plan of diversion by means of Parker Dam, the point of diversion is to be located on the right hand or western bank of the Colorado River 2019.5 feet S. 50° 12' 54" W. of the S.E. corner of Sec. 5, Tp. 11 N., R. 18 W., G. * S.R.M., Arizona, being within the (unsurveyed) S.M.i, N.E.*, of Section 33, Tp. 3 N., R. 27 E., S.B.M., in the County of San. Bernardino, California. Paragraph 6. Intake or Headworks. (a) Diversion under each of the contemplated methods (i.e., through clarifiers or by means of Parker Dam), will be made by pumping: Capacity of plant 720,374 gallons per minute (1605 cubic feet per second). The grade tunnels, grade conduits and lined canals will be constructed to full capacity as part of tho first development. The pressure conduits (syphons),force mains, pumping plants and roser-vpirs, being susceptible of economic construction in stages or parallel sections, will be constructed of adequate initial size as part. of the first development, and will be increased from time to time (commencing in the 9th year of operation, or in 1947) until the required ultimate capacity is attained. (b) Diversion through the clarifiers will be made by pumping without the aid of any diversion dam below the proposed intake. Under the alternate plan of diversion by means of Parker Dam, diversion will be by pumping but with the aid of Parker Dam, said dam being 80 feat in height (stream bed to level of overflow); 590 feet long on ^ top; and constructed of concrete. M (c) Under the alternate plan of diversion the storage dam (for combined storage and regulation purposes) will be 80 feet in height (stream bed to over-flow level); 590 feet long on top; have a freeboard of 15 feet, and be constructed of concrete. Paragraph 15. Municipal Use. The estimated average daily consumption during the month of maximum use at the end of each five year period until the full amount apolied for is put to beneficial use Is as follows: Estimated average daily Estimated average daily consumption during month diversion during month of of maximum use (in second maximum use (in second Year. feet) .___________________ feet; .__(See Note 1.) 1938 600 700 1943 730 800 1948 850 800 (See Note 2.) 1953 1000 1050 1958 1150 1200 1963 1300 1340 1968 1400 1430 1973 1500 1520 1978 1570 1530 1980 1600 1605 Note 1. Approximate only. Involves complex sturdy of economic use of seasonal off-peak po.ver from Boulder Canyon power plant, which is as yet incomplete. Note 2. Regulation chiefly from storage until completion of certain deferred portions of project included in second development 6s noted in Paragraphs 6a, 9 and 10, supra; namely, certain aqueduct pumping