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<br />. <br /> <br />full length of the Division; the MODE extends from the <br />terminus of the WMMCC to Morelos Dam. Drainage flows can <br />either be delivered to the Colorado River for diversion <br />by Mexico, or bypassed below Morelos Dam to the river <br />channel. All drainage is presently being bypassed. In <br />recent years, annual drainage has ranged from 210,000 to <br />220,000 acre-feet. <br /> <br />The Yuma Desalting Plant will annually treat most of the <br />MODE flow in order that it may be utilized for deliveries <br />to Mexico, which are subsequently diverted by Mexico at <br />Morelos Dam. Operational reject from the plant will be <br />discharged to the Santa Clara Slough via the Bypass Drain. <br />Flows in the MODE are expected to increase from the current <br />level of 203,000 acre-feet per year to 167,000 acre-feet <br />per year by 1981, as a result of the Well ton-Mohawk <br />Irrigation Efficiency Improvement Program and the Wellton- <br />Mohawk Acreage Reduction Program (6,200 acres of low- <br />efficiency irrigated land will be taken out of production <br />and 3,800 acres of undeve loped Federa 1 1 and wi 11 be <br />restricted from development). Other hydrologic and <br />hydraul ic parameters are presented in Table S-l and Figure <br />S-l, following this summary. <br /> <br />PROJECT MEASURES: <br /> <br />. <br /> <br />The seven project measures, as previously mentioned, are the <br />1) Yuma Desalting Plant, 2) Bypass Drain, 3) MODE Siphon, <br />4) Well ton-Mohawk Irrigation Efficiency Improvement Program, <br />5) Wellton-Mohawk acreage reduction, 6) Painted Rock <br />Reservoir land acquisition and operation schedule modifica- <br />tion, and 7) Fish and wildlife mitigation measures. <br /> <br />Yuma Desalting Plant: <br /> <br />The Yuma Desalting Plant will be a membrane desalting plant <br />that will reduce the salinity of Wellton-Mohawk pumped <br />drainage before it is returned to the Colorado River. The <br />plant will be located about four miles west of Yuma, near <br />the Arizona Public Service Yucca-Axis Powerplant. The plant <br />capacity will be 108.5 Mgal/d of product. Well ton-Mohawk <br />drainage is expected to total 167,000 acre-feet per year at <br />3,200 p/m, of which the plant will desalt up to 102,700 acre- <br />feet to 386 plm and produce up to 43,300 acre-feet of <br />reject at 8,874 p/m; approximately 100 additional acre-feet <br />will be consumed in the pretreatment process. When the <br />plant product ;s blended with the remaining 20,900 acre-feet <br />from the MODE, 123,600 acre-feet of total blend water at <br />854 plm will be returned to the Colorado River annually. <br /> <br />. <br /> <br />d <br />