AZ vs. CA:04 California Exhibits, Vol. IV; Nos. 151-192

page 92

92 THE ALL-AMERICAN CA^AL. Excavation: Earth. 43.605.000 cubic yards, at 30 cents............. $13,0S1, 500 Earth, 1,770.000 cubic yards, at 20 cents.............. 354.000 Blow sand.1 500.000 cubic yards, at 30 cents............ 150, 000 Rock, 312.000 cubic yards, at 75 cents............... 234,000 Concrete lining, 10,792,000 square feet, at 17 cents...... I, S34, 640 Total......................................,...... 15,654,140 15 per cent contingency.............................. 2,348,121 ---------------- $18,002,261 Structures: East mesa canal Xo. 1 turnout....................... 24,000 26 miles telephone................................... 5, 850 Total............................................. 29,850 15 per cent contingency.............................. 4,477 ---------------- 34,327 Grand total................................................... 18,036,588 The above alternative estimates include the extra excavation from the west side of the sand hills to station 1575, due to the canal being in deeper cut because of the increased slope of the concrete-lined section. The 6-foot drop at station 1575 will just be eliminated by the greater gradient. This, however, will lower the elevation of the east mesa canal Xo. 1, 6 feet, and thus eliminate a certain acreage on the east-side mesa that can not be served by gravity. It will also reduce the possible head at mesa power station -No. 1 from 30 to 24 feet. Alternative Xo. 1 decreases the cost. 8120,451 over a canal built in an earth section. Alternative Xo. 2 increases the cosir$969,841 over a canal built in an earth section. The estimated cost of the other sections of the canal will remain the same as in the first estimate and are, therefore, not repeated above. In the second alternative estimate, future enlargements of the earth sections are anticipated but not covered in this estimate. Estimate Jot construction oj all-American canal oj capacity to sen-e the Imperial Irrigation District with 1.600 second-Jeet additional capacity Jor Yuma project down to siphon drop. (Laguna Dam to siphon drop, 7,600 second-foot canal.) Excavation: Earth, 3.570.920 cubic yards at 20 cents.........,........ $714,184 Rock. 542.300 cubic yards at 75 cents................... 406, 725 Total............................................... 1,120, 909 15 per cent contingency..........................-...... 168,136 --------------- f 1,289,045 Structures: Alterations at Laguna Dam (see Exhibit C)................ 745,000 Sluice about 1| miles below Dam....................... 240,000 Turnout, reservation canal....___-..................... 10,500 Check below turnout, reservation canal................. 27,500 Ficacho road bridge__.................................. 34,000 Raising siphon drop................................... 20,000 i Estimated amount of sand that win blow in daring construction.