AZ vs. CA:02 California Exhibits, Vol II; Nos. 58-113A

page 19

-19- depth of cutting, I mean that depth which will give, on smooth ground, the least yardage in excavation required to construct the levees. Normal cutting gives the cheapest construction possible in theory. On this canal, the normal depth of cut above El Rio should be 4 feet, and below the International Boundary YardSe 2.2 feet. The normal yardage in excavation should be, for each 1000 feet of canal, above El Rio 18070 cubic yards, and below the Boundary 9720 cubic Yards. An examination of the profiles, the depths of cutting and the calculated yardages shown thereon, will show you that, for the major portion of the distance, the actual work is less than 15% in excess of normal. From the East Branch Fork to Mesquite Lake, the ground is much smoother than the ground over which the surveys have been projected and exact estimates calculated. H°eCavy°work The excavation for the first two miles below the Intake is heavy but it is all in earth, and I am greatly pleased at the showing made there, since when the survey was staked from the Potholes, I naturally expected to be in very heavy cutting for a much greater distance than 2 miles. From Sta. 680 to 760, 9000 feet, we will be obliged to move 458600 cubic yards, 290000 of which I classify as cement; but this involves no engineering difficulties, it is a matter of expense only, and by means of the El Rio power plant, I expect to hydraulic these