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WSP07460
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Last modified
1/26/2010 2:27:26 PM
Creation date
10/12/2006 2:24:12 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8278.400
Description
Title I - Mexican Treaty
Basin
Colorado Mainstem
Date
2/1/1963
Author
USDOI/BOR
Title
Special Studies - Delivery of Water to Mexico
Water Supply Pro - Doc Type
Publication
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<br />Title I Wor1cs and Capftal Costs <br /> <br />Reclamation continues to investigate the <br />causes of increased irrigation drainage <br />pumping, In cooperation with the WMIDD, <br />SCS, and others, Reclamation will explore a <br />program of irrigation efficiency improve- <br />ment measures or other measures, with a <br />goal of permanently reducing irrigation <br />drainage pumping to 108,000 acre-feet or <br />less per year, <br /> <br />Reclamation's future activities are outlined <br />below, (Also see figure 5.) <br /> <br />. Continue discussions among project and . <br />regional offices concerning increased <br />irrigation drainage, <br /> <br />Identify possible causes, <br /> <br />Define reduction goal, <br /> <br />Identify potential institutional or legal <br />authority, <br /> <br />Identify funding options. <br /> <br />Meet with WMIDD, SCS, and other <br />interested Federal agencies, <br /> <br />. Develop program goals. <br /> <br />. Identify roles and commitments for all <br />involved agencies, <br /> <br />. Discuss potential activities of all <br />agencies involved, <br /> <br />. Discuss implementation schedule, <br /> <br />. Discuss monitoring requirements, <br /> <br />. Identify specific Federal authorities <br />and limitations. <br /> <br />. Identify additional staffrequired and <br />sources of funding, <br /> <br />. Develop monitoring plan, <br /> <br />Complete implementation schedule. <br /> <br />. Execute letter of agreement defining <br />responsibilities of all agencies involved. <br /> <br />Fully implement irrigation drainage <br />reduction program, <br /> <br />Coachella Canal Lining <br /> <br />Ai; authorized by section 102(a} of Public <br />Law 93-320, the first 49 miles of the <br />Coachella Canal were concrete lined to <br />reduce seepage and, for an interim period, <br />to provide a source of replacement water for <br />bypassed WMIDD irrigation drainage. The <br />lined section conserves an estimated <br />132,000 acre-feet of water per year. The <br />canal originates as a diversion from the <br />All-American Canal at a turnout point near <br />the Mexican border and runs generally <br />northwest for about 123 miles, (See <br />frontispiece map,) It provides irrigation <br />water for 67,000 acres ofland in the <br />Coachella Valley, <br /> <br />Shortly after the Coaebella Canal was <br />completed in 1948, seepage losses became <br />apparent in the first 86 miles of unlined <br />canal. The most severe seepage occurred in <br />the first 49 miles of the canal, which <br />traversed the coarse, sandy soils of the <br />Imperial East Mesa in California An <br />estimated 141,000 acre-feet of Colorado <br />River water was lost each year in this <br />section, <br /> <br />The Coachella Valley Water District <br />(CVWO) operates and maintains the new <br />lined canal, Canal-lining costs are to be <br />repaid by the CVWD over a 4o..year period <br />on an interest-free basis. However, the <br />payments are waived for the interim period <br />when the United States has use of the <br />conserved water, (See chapter II, "Title I <br />Provisions,") <br /> <br />15 <br />
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