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

page 85

THE ALL-AMERICAN CANAL. 85 (d) As a first alternative under (&) a concrete-lined section has been estimated through the deep cut from Pilot Knob through the blow sand. (e) As a second alternative under (b) a concrete-lined section with a depressed grade of 1.3 feet has been estimated through the deep •cut from Pilot Knob through the sand hills. The objections to a concrete-lined canal at this time are: First, that it does not readily admit of enlargement; and, second, there may be more or less settlement due to the surrounding ground becoming wet for the first time. The last estimate mentioned above is for the purpose of providing 1,600 second-feet additional capacity through the lined section without changing the elevation of the water surface at Laguna Dam over that contemplated in estimate under (&). (/) The division of costs between the Reclamation Service (for the Yuma project) and the Imperial Irrigation District for the enlargement of the diversion works at Laguna Dam, the enlargement of the Yuma main canal from Laguna Dam to siphon drop and the construction of a new canal from this latter point to the proposed power plant of the Reclamation Service near Araz is fixed by the contract of October 23, 1918, between the Secretary of the Interior, and Imperial Irrigation District. These ratios under the above-mentioned contract are as follows: For a canal of 10,600 second-feet capacity at Laguna Dam, the Yuma project will pay two-ninths and the Imperial Irrigation District seven-ninths of the cost of enlargement. For a canal of 7,600 second-feet capacity at Laguna Dam, the Yuma project will pay one-third and the Imperial Irrigation District two-thirds of the cost of enlargement. This division of cost is taken into account in the final analysis. In the "development of a diversion capacity of 7,600 second-feet, the canal structures are designed for the full development of 10,600 second-feet. In order to obtain the amounts the several interests should pay, the costs of excavation and structures should be divided on a different basis, in accordance with the provision of the contract of October 23, 1918. This will leave an investment for the benefit of the new lands which will come under the project in the future. For the carrying of this investment some agreement must be reached between the Government and the Imperial Irrigation District prior to the beginning of construction and until the new lands assume the indebtedness. The same principles must be applied from Araz to the points of bifurcation where the new lands will take their water. In this case, however, there is no contract fixing the methods of apportioning the costs between the new lands and the Imperial Irrigation District. For the purpose of arriving at the cost apportionment between the Imperial Irrigation District and the new lands it is assumed that these costs would be apportioned on the acreage basis, or about 60 per