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<br />, , <br /> <br />. <br /> <br />-14~ <br /> <br />a. E2! canals !!!.rocky soils -- The wash-in or <br />multipl~dam methods seem best. <br />b. ~ canals!!! sandy soils -- Extensive experience with <br />10caJl clays in these materials is lacking. but trials on a wash-in or <br />float-in basis are planned. <br />c. EE! pondl3~ leaky ~ -- The mixing of not less <br />than 1 inch of bentonite into the top 3 inches of sub-soil following by <br />compaction seems best. <br />5. l! mor~ specific information ~ installation methods available?-- <br />No~ not at the present time. but how-to-do circulars for each of the import- <br />ant methods are planned as sufficiently complete and documented information <br />becomes available. <br />6. Where is additional work needed? -- Additional research and <br />- - <br />development work is needed and is planned (contingent upon funding) in <br />the following categories: <br />a. Trial installations in clear-water canals below <br />reservoirs in the area' east of Pueblo. <br />b. Controlled trial work in d~errnining how much clay <br />is required in float-in installations--especially in rocky soils and includ- <br />ing follow-up maintenance tre~tments in succeeding years after initial <br />installation. <br /> <br />c. Comprehensive ,sampling and laboratory testing of <br />clays from those deposits now being worked on a beginning commercial <br />basis. <br /> <br />d. Development of recommended application rate tables <br />for each; major clay deposits now being worked on a commercial basis. <br />e. Assistance to clay producers in setting up pit <br />operation procedures necessary to produce acceptable and uniform clay <br />materials for canal and pond work. <br /> <br />1030 <br />