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<br />31 <br /> <br />.e <br /> <br />;"'; ,.OJ." ~ <br />~....1.... <br /> <br />Capacity ~able - Bouldor C2~on RJServoir. <br /> <br />(Computed fro~ original vlanetablo shoets; <br />sca.le, 3" e'l.=ls 1 "ule) <br /> <br />. <br /> <br />,~OTE: The canyon walls extend up to abov.o the 2,OJO-foot <br />contour, or about 700 fact; higher than the last' <br />one for which capacity is calculated. <br /> <br />Progross of Inv3s~ig~tions. <br /> <br />The pr'31iminary report on the problems of Imr"rial <br /> <br />Valley and vicinity, publishf.ld in Janu3XY, 1921, described <br /> <br />the progress of investigations up to that dat~, and these <br /> <br />have been continued up to the proparation of this report. <br /> <br />Soil surveys wlder tho direction of Prof. Cr.aries F. <br /> <br />Shaw havo beon prosf.lcuted and l~~d classification based uFon <br /> <br />this examination has belen OJado and sho\m upon maps. These <br /> <br />subjects are ;raateld in this revort on subsequent pages. <br /> <br />Borings have bf.len prosecuted at tho proposed dam site in <br /> <br />. <br /> <br />Beulder Canyon a~ the cross sac. ion of the canyon has been <br /> <br />fairly well worked out. A largo amount of additional borings <br /> <br />is, however, necessary to develop the entire foundation of the <br />