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<br />Oil03:8 <br /> <br />2. Wellton-Mohawk drainage water ~ This water source is the result of the need <br />to drain and dewater lands under the WMIDD to prevent water logging and <br />salinity buildup. This supply can be used as a water source to maintain a <br />viable Cienega as it currently is and/or can be a supply source for the Yuma <br />Desalting Plant which would be subject to treatment for delivery to water <br />users. <br /> <br />3. Groundwater from the Protective and Regulatory Pumping Unit (Minute 242 <br />well-field) ~ This groundwater source would come from existing or additional <br />wells on the U.S. side of the border that may be used to meet Treaty <br />obligations or for other purposes. This supply source can be used as a <br />replacement for drainage water that is currently delivered to the Southerly <br />International Boundary (SIB) ifthat water is no longer available. The supply <br />can also be directly pumped into the MODE for delivery to the Cienega if the <br />Wellton Mohawk drainage water is no longer available. <br /> <br />4. Groundwater from the South Gila Drainage Wells and other Yuma area wells <br />~ This water source is the result of the need to increase drainage pumping in <br />the Yuma area to prevent water logging and soil salinity buildup. The <br />additional groundwater may be discharged into the Colorado River for <br />delivery to Mexico, or it may need to be treated or blended in order to <br />improve its water quality. It also may be delivered to meet Treaty obligations <br />at the SIB or as a replacement supply for the Cienega. <br /> <br />5. Mexican drainage water ~ Improved drainage facilities and management in <br />Mexico could be constructed resulting in an increased volume of brackish <br />water supply. Drainage water from irrigated land in the San Luis Valley, <br />Sonora could be captured and delivered to the Cienega de Santa Clara. <br /> <br />6. City of Yuma and other communities' effluent ~ The City of Yuma owns and <br />operates a wastewater treatment plant which produces high quality effluent. <br />After committing the effluent for uses within its service area, there is likely to <br />be additional effluent that could be purchased as a water supply source. The <br />water could be discharged into the MODE to be used as an alternative or <br />supplement to WMIDD drainage water to maintain the Cienega. Effluent <br />from other communities in the vicinity, such as Somerton, Gadsden, and San <br />Luis, could also become a potential water supply source. <br /> <br />B. Conservation measures ~ Conservation measures provide an indirect water <br />supply to satisfy objectives. Water which is conserved reduces overall demand <br />thereby creating a "no net impact" situation. Water conservation, in the form of <br />the Coachella Canal lining, was identified as the solution to the bypass flow <br />during the Interim Period under the Salinity Control Act. <br /> <br />1. Offstream storage to re-capture water lost because of storm water inflow and <br />changed water orders ~ Proposals are being investigated to provide additional <br />regulatory storage in the lower portions of the Colorado River area in order to <br />reduce over deliveries to Mexico that result from U.S. water releases that are <br />not diverted as ordered. These proposals include rehabilitation of Senator <br /> <br />Recommendations of the YDP/Cienega Workgroup <br /> <br />11 <br />