Show Circular Tells How To Seal Rocky Ditches How a like clay substance caled called cal cal- led ed can be used to seal rocky irrigation ditches Is described described des des- in ln a circular j just st published pub lashed by Colorado State university university sity Fort Collins Methods described were developed de dc by R R. D. D project pro Jeet leader of canal sealing scaling investigations investigations in in- at He lie has been experimenting with asa as asa asa a low-cost low sealer for about six alx years The circular is written and Illustrated by R. R T Shen ass assi assistant I. I stant stunt research engineer with the civil engineering ep rt ment The multiple dam method for rocky ditches was developed near Aspen on a foot canal owned by the Twin Lakes Reservoir Reservoir Reservoir Res Res- and Canal Company The canal was was treated in 1956 and only a R slight deterioration in ef effectiveness effectiveness et- et of the seal has since sines been noted The circular Sealing Rocky Ditches with the Multiple Mul Mul- Multiple tiple Dam Method is available from Dulle Bulletin tin Room Colorado State university It can also be obtained from some county extension ex ex- extension tension offices 1 Also available is another publication pub pub- I Sealing Sandy Ditches with the Dispersion Method Entirely different techniques tech tech- are necessary for sandy ditches Dirmeyer points Out Three other circulars on use of will be published soon one deals with mixing ben ben- one with testing it and the third with its use to seal farm ponds and reservoirs |