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<br />. <br /> <br />. <br /> <br />INTRODUCTION <br /> <br />This report contains several condensed but detailed tabulations of <br />information, which at this early stage in the resource-evaluation and <br />application-research-and-development work are of a tentative incomplete <br />naturel. lVidespread interest in the ;;ork and numerous inquiries for <br />information make it desirable to present a fairly detailed summary of <br />work at this time. Common questions include: <br /> <br />.' <br /> <br />l. Procedure--what are the best procedures for canal or reservoir <br />se'al1ng 1fOrk 'lith local clays? <br /> <br />2. Quality--what are the specifications for a clay, satisfactory <br />for sealing purposes? <br /> <br />3. Results--what results have' been produced in the field trials <br />with local clays? <br /> <br />As a partial answer to the above questions, consider the information <br />compiled by the early efforts of the bentonite (or clay) sealing project <br />at CSU, in cooperation with many irrigation organizations, individuals, <br />and clay producers. <br /> <br />SAMPLING AND EVALUATION OF SAMPLES <br /> <br />Tables I and II summarize the results of the initial sampling and <br />laboratory testing of bentonites or clays from locations as shown on <br />Map I. <br /> <br />In the laboratory evaluation work, samples of clays are being tested that <br />have been collected both (a) by COO project people, and (b) by interested <br />individuals or prospectors. 1;e are especially encouraging the latter <br />type of sampling and will be glad to furnish additional details of what <br />to look for to any interested parties. An ExtenSion Service circular, <br />Testing Bentonite for Sealing Purposes (No. 205-A), is available at most <br />County Agent offices-in Colorado (and in Vlyoming as 1fell--Circular,. <br />No. 161). <br /> <br />The test procedures used in the laboratory evaluation work have involved <br />existing procedures to the maximum extent pOSSible, but in order to <br />fully characterize and evaluate the clays or bentonites from a canal <br />and reservoir sealing standpoint, the development of new test procedures, <br />including major modification of existing procedures, has been necessary. <br />A brief description of the test procedures used in the evaluations to <br />date is included at the bottom of Table I. More complete details of the <br />test procedures can be obtained, if desired, by '~iting to us. <br /> <br />~entative in a sense that the 'lOrk is in its beginning stages--having <br />been fully funded starting July 1, 1960. <br /> <br />1026 <br />