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<br />-13- <br /> <br />keeping the costs low and th'!') sealing results high is a combined operation <br />where the contractor or irrigation district do both the minillR: and the <br />installation. Many local earth-moving and ditch-cleaning contractors can <br />handle this combined operation with no additional equipment being required. <br /> <br />CONCLUSIONS AND RECOMMENDATIONS <br /> <br />1. Where ~ clay sealing.lli!!!'? -- The uses of local clays <br />in sealing canals and ponds offer important low-cost, stop-gap m!Jthods for <br />controlling loss of water. In many instances. however, the best long-range <br />approach will be one of salvaging seepage water now by using a clay seal- <br />, - <br />ing method while working toward a future goal of eventually controlling the <br />seepage with hard-surface linings. <br />Z. l! ~ sampling complete? -- A complete inventory of all <br />potential deposits of clay for sealing purposes in the District area has not <br />been completed. It is believed, however, that the best deposits have been <br />sampled; ther~fore, no additional sampling of new deposits is planned. If <br />sampling of new deposits is requelit~d.it will be accompliShed--within limits <br />of available project funding. <br />3. ~..!!!!! acceptable clay? -- It is a basic premise that local <br />clays, if properly handled, can be used to seal local canals and ponds. Thus, <br />tb.e emphasis of the Colorado State University Project development work is <br />concerned more with how to use the local clay to obtain satisfactory results <br />rather._than with developing a rigid specification or preconceived notion of <br />what is acceptable and what is not acceptable. Specifications are needed, <br />but not on a hasty premature basis. <br />4. What are the recommended installation methods? -- The initial <br />-~- <br /> <br />evaluations of clay installations in canals and ponds have revealed several <br />dominant methods: <br /> <br />1031 <br />