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<br />. <br /> <br />design. In any case. the plant c"pacity CiS detcrmined by this investigation will be 108.5 <br />Mgal/d. The annnal plant production cap"city will be 102.700 acre-fcet of product water <br />"t 386 p/m unci, consequently, 43,300 "cre-feet of concentrated reject "t 8,874 p/m. <br />Wellton-Moh"wk drainage is expccted to total 167.000 acre-feet 'II1nually when <br />the plant becomes operational in 1981. Approximately 20,900 acre-feet of MODE water <br />which will not bc desalted will be blended with the product water to result in 123,600 <br />acre-ket of total blended water at 854 p/m to be returned to thc Colorado River. This <br />110w, combined with othcr flows to the river below Imperial Dam, will result in 1,360,000 <br />acrc-fcet of water at 980 p/m for delivery t'J Mexico at tbe Northerly Internatio!1al <br />Boundary. Consequently, the salinity of water "rriving at the Northerly International <br />Bound"ry will annu"lIy aver"ge 115 p/m..:': 30 p/m more th"n the salinity of water arriving <br />at Imperial Dam. in accordance with the provisions of Mil/lIle No. 242. <br />The design plunt capacity is based on a "worst case" cOllditioll. The "worst <br />case" condition is the maximulll plant cnpacity rcquin.'d during projectt"d hydrologic <br /> <br />conditions which could occur during ye:.HS when the plant output requirement would be <br /> <br />. <br /> <br />gre"tt's!. During the period 1982 through 1993, operation studies indicatc that the average <br />annnal pl:int procluction will be 60,000 acre-feet with 26.000 acrc-feet of rejcct. <br />D.2. Bypass Drain <br />A bypass drain will be constructed to carry reject from the desalting pl"nt. <br />Construction will extcnd from the end of the MODE at Morelos Dam, tbrough Arizona <br />and Sonora, to the Santa Clara Slough. The Slough eventually terminates in the Gulf <br />of California, but the end of the drain will be at the upper end of the Slough, "pproximately <br />30 mill'S from the Gulf. The drain will be 50.7 miles long with a capacity equal to that <br />of the MODE, 353 cubic feet per second fft3/s), and will be concrete lined. The normal <br />110w will be the desalting plant reject, which will be a maximum of about 62 ft3/s. <br />Reject will be carried in the existing MODE for 2 miles from the MODE-2 <br />bifnrcation at the desalting plant (MODE-2 is a discharge channel from the MODE to <br />the Colorado River at the proposed plant site) to MODE-3 at Morelos Dam (MODE-3 <br />is the disch<Hge channel frol11 the MODE to the Colorallo River ()'l tl'e downstream side <br />of Morelos Dal11). All blended water will be returned to the Colora-1o River through the <br /> <br />. <br /> <br />6 <br />