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<br />Title I Program <br />Colorado River Basin Salinity Control Act <br /> <br />The water will be delivered at the Southerly <br />International Land Boundary near <br />San Luis, Arizona. Currently, water from <br />wasteways and drains in the Yuma Valley <br />exceeds 15,000 acre. feet per year. Should <br />these wasteway and drain flows diminish in <br />the future, wells will be added to the PRPU, <br />as needed, to ensure that approximately <br />140,000 acre. feet can be delivered at the <br />Southerly International Land Boundary at <br />all times. <br /> <br />Title I Capital Costs <br /> <br />Approximately $390 million was allotted for <br />Title I works through fiscal year 1992; <br />$9 million has been requested for 1993, and <br />$52 million will be required after 1993 to <br />complete the Title I program. <br /> <br />The Title I authorized appropriations <br />ceiling, in October 1992 dollars, is <br />$472.8 million, adequate to fund the <br />program as proposed, <br /> <br />Ability of Title I to Support Its <br />Objectives <br /> <br />Before Completion of the YDP <br /> <br />The United States has complied with the <br />salinity differential without the YDP since <br />1974 through the temporary measures of <br />bypassing WMIDD irrigation drainage, <br />substituting water from upstream storage <br />for treaty deliveries to Mexico, and, since <br />1982, claiming as replacement the water <br />conserved by lining the Coachella Canal. <br /> <br />AI; stated previously, under Public <br />Law 93.320, the replacement of irrigation <br />drainage bypassed to meet the salinity <br />differential is recognized as a national <br />obligation, The United States has secured <br />interim use of 132,000 acre.feet per year of <br /> <br />ES-4 <br /> <br />replacement water by lining the Coachella <br />Canal. However, the United States has not <br />secured water to replace the amount of <br />WMIDD irrigation drainage bypassed in <br />excess of 132,000 acre.feet per year, which <br />totaled 5,900, 6,000, and 13,000 acre.feet in <br />calendar years 1989, 1990, and 1991, <br />respectively. <br /> <br />Future With the VDP <br /> <br />In the future, ifWMIDD irrigation drainage <br />pumping is permanently reduced to <br />108,000 acre. feet per year (the volume the <br />YDP was sized to accommodate) and the <br />YOP is operated at full capacity, no <br />untreated irrigation drainage will be <br />bypassed, except during extremely low <br />salinity conditions in the river. This use of <br />the YDP will conserve water by maximizing <br />the recovery ofWMIDD irrigation drainage <br />for treaty deliveries to Mexico, <br /> <br />Reclamation has pursued, and continues to <br />pursue, measures to replace the YOP reject <br />stream and bypassed WMIDD irrigation <br />drainage, as well as other measures to <br />reduce loss of water to the Basin States. <br />For example, Reclamation is studying ways <br />to improve YDP efficiencies to reduce the <br />volume of the reject stream, New mem- <br />brane technologies, an integral part of the <br />YOP cost reduction program, would <br />contribute most directly to improved <br />efficiencies. <br /> <br />To obtain a source ofreplacement water for <br />the reject stream, Reclamation is studying a <br />plan to remove riparian salt cedar along the <br />lower Colorado River and replace it with <br />vegetation with lower water demands and <br />greater wildlife habitat and recreation <br />values, <br /> <br />. <br /> <br />As a fiscal year 1994 planning start, <br />Reclamation is also investigating a proposal <br />to create additional storage on the lower <br />