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<br />I <br />I <br />I <br />I <br />I <br />I <br />I' <br />I <br />I <br />I <br />I <br />I, <br />I <br />I <br />I <br />, <br />I <br />I <br />I <br /> <br />4. Schedule for Phased Constructil)J1. <br /> <br />If the CWCB loan can be approved in time, Phase 1 will be put out for <br />bid in late summer of 1996, with a scheduled completion date of April, <br />1997. No schedule has been set for Phases 2 and 3; this will depend <br />primarily on availability of funding. The NRCS grant and CWCB loan are <br />for Phase I only. <br /> <br />B. <br /> <br />COST EFFECTIVE ANALYSIS BY NRCS AND BuREC <br /> <br />1. NRC Analysis <br /> <br />NRCS can fund both on-farm and off-farm salinity control programs. Their <br />main emphasis has been on on-farm systems. However, they have funded <br />several off-farm private laterals; the Mutual Mesa lateral is their first <br />publicly owned supply canal. <br /> <br />All projects funded by the NRCS Salinity Control Project must be evaluated <br />to determine if they are cost effective from the standpoint of salinity <br />control. NRCS has determined that each ton of salt load reduction has a <br />benefit of $55.50. This value is reflective of salinity damages at Imperial <br />Dam from projects above Park.er Dam; it was taken from a publication <br />entitled Colorado River Salinity Economic Impacts on Agricultural, <br />Managerial and Industrial Users, authored by Ellen Kleinman and Bruce <br />Brown (Bureau of Reclamation, 1980). Data is updated periodically using <br />the current GNP Implicit Price Deflator as published by the Department of <br />Commerce. <br /> <br />The initial cost effective analysis by NRCS was done prior to final design, <br />and was based on improvements to the entire ditch; an estimated length of <br />21,530 feet was used. Salt contributions by the Mutual Mesa Ditch were <br />calculated based upon formula~ and procedures developed by NRCS. <br />Seepage from the ditch is calculated based upon a cross sectional area. It <br />is assumed that the seepage water percolates into the Mancos shale, which <br />eventually reaches the Colorado River. The formulas determine how much <br />salt would be pick.ed up by the percolating water. The methodology for <br />calculating the salinity control from the Mutual Mesa Lateral project is <br />shown in Appendix C. The NRCS calculation showed that reducing all <br />seepage would result in a salt reduction to the Colorado River at a rate of <br />2465 tons per year (based on 21,530 feet of ditch). Using the factor of <br />$55.50 per ton for salt saved, an annual benefit of $136,808 was <br />calculated . <br /> <br />V-5 <br />