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<br />c:::- <br />o <br />;.~ <br />>>:'" <br />: ,-' <br />CJ1 <br /> <br />Location oJ Supply Options Minimum Sustained Flow for <br />Supply For Overall Water Riparian Corridor and/or Other Periodic Pulse/Flushing Comments Quantity of Cost Pros & Cons <br />Option Management Plan Environmental Needs Flows and/or Cienega Needs Water <br />Action <br />United U.S.B.R. store I O-year supply of Contributes to flow to the Cienega Contributes to flow to the Cienega Assign right to Arizona, prior to Arizona Storage $150- Pro- Creates water supply for Cienega <br />States water for Cienega in Cienega right, to secure Arizona's Interstate 170/af <br /> groundwater storage in Arizona. use of stored water in event of storage limited Recovery Con- If water acquired in competition with <br /> prolonged drought. to 200 kafy -$1001af Basin states' efforts to meet their needs, could <br /> Interstate reduce water available to the states and <br /> recovery (MWD staff increase the cost of meeting their water supply <br /> limited to 100 report 11/02) needs; In the near term, may be limited <br /> kafy capacity for storage utilizing existing facilities. <br /> Limited capacity for forbearance based on <br /> existing Arizona state law. May be more <br /> ~_xpensive than other alternatives, <br />United Water conservation in Wellton- Does not contribute to minimum Does not contribute to periodic Pro- Reduces needs for Yuma Desalting Plant <br />States Mohawk Irrigation District to sustained flow pulselflushing flows operation, funds may be freed up in the future for <br /> reduce water to MODE other purposes. Would reduce current deliveries <br /> to Mexico in excess of Treaty obligation <br /> Con- Impact on Cienega from reduced MODE <br /> flow <br />United Dedicate 40-50 kafy of Well ton- Dedicated flows or flows Dedicated flows or water Pro- Would be counted as part of Mexican Water <br />States Mohawk drainage water to the piggybacked on other dedicated piggybacked on other dedicated Treaty 1.5 maf delivery obligation. Reduce need <br /> U.S. river corridor, causing it to flows to meet minimum sustained flows to meet total pulse flow for Yuma Desalting Plant operation <br /> become system water flow needs needs Con- Would adversely affect salinity of deliveries <br /> to Mexico, potentially requiring releases from <br /> storage to meet salinity differential between <br /> Imperial and Morelos Dams. <br />Mexico Collect and treat wastewater in Dedicated flows or flows Dedicated flows or water Assurances required from Pro- Assists in addressing pollution of <br /> San Luis, Sonora and deliver to piggybacked on other dedicated piggybacked on other dedicated Mexican government that water groundwater supplies in San Luis area <br /> location of environmental use flows to meet minimum sustained flows to meet total pulse flow would be dedicated to Con- Capital and O&M costs; risk of diversion <br /> flow needs needs environmental uses, i.e., non- to non-environmental purposes. <br /> agricultural or municipal uses. <br /> - <br /> <br />DRAFT-Confidential and Privileged Information <br /> <br />Page 10 <br />