The Arizona sentinel., 1903-07-08

such substantial gates that at all stages of the river we can have com p1ete control of the water. The floor of the canal will be eXcavated to such level as to give us full water supply when the river is at its lowest stage, equivalent to IS feet on the K. K. gauge. This settles the question of safety from floods.
 Now, to take up the silt question; MT. Howe1ls has worked out a most ingenious scheme. By looking at this map you will see that the canal, from the intake down to the heading of the Rock1and Canal, is. practically the same length as the river. The river, in this length, has more than sufficient grade and velocity to carry all q its burden of silt, as is evidenced by there being no bars formed in this part. The bottom or floor of our canal will be run on the same grade as the river, but the banks will be built mp and the canal made so wide that the surface of the canal water, when the sluice-gate is closed, will be on very much fatter grade, thereby reducing the velocity so much that the canal water will be una ble to carry it's burden, and all the silt will be deposited in this reach of two miles. Periodically the s1uice- gate into the river will be open and the silt s1uiced out into the river.
 You will note that, for the next few
 miles, the canal follows a series of lagoons and then has another sluice- gate into the river, which will only be opened at long intervals of time. At this point we have the surface of the water sufficiently high to com- mence irrigating the surrounding country. Wherever possible we pur- pose building the canal in the lower portions of the country and banking 1t, irrigating with surface water rather than keeping on the higher country where the floor of the canal would be above the surrounding country. This will give us very safe canal.
 The crossing of the Gila River will be by means of either a steel Hume carried on masonry pillars or mono 1ithic aqueduct. In either case the grade at this point will be increased, thus enabling the width of waterway H%> bo 1aoraaen1 ln.1 is generally dry, it is subject to occas- iona1 floods, although, with the storage contemplated in the higher country, these floods will in future be much less severe. We shall, in any case, put our foundations i'll securely and make the crossing entirely safe. Where the canal reaches the Mesa, at the point marked red on the map, sufficient elevation will have been gained to allow us to drop the water ten feet. By means of direct-connect- ed pumps and turbines part of the water will be pumped up to the mesa. The same thing occurs at the other three stations marked, and the water so pumped will enable the area painted dark green to be irrigated at the rate of one second foot of water to every 16O acres, equivalent to Az acre feet per year.
 There are three possible means of taking the canal from above Yuma to the country below, any of which are quite feasible from an engineering point of view. First, by cut through the mesa above Speese's Mountain; second to take a course through the town and give you a beautiful clear river. And just think what that means i'll this hot and dusty country. By planting shade trees on the banks your town of Yuma can be made one of the most beautiful cities in the Western country. Or, thirdly, the canal can be carried round the Peni l tentiary Point and flumed down the i river bank under the idle span of the K. R. bridge. The canal will start | with about 20O0 second feet of water, and this will give even more than enough to irrigate with an ample sup ply all the land, some 10000 acres, shown green on the map.
 trust I have made my explanation clear to you. Personally l am not Civil Engineer, but a Mechanical Engineer, especially interested i'll designing and operating dredging machinery; and it is for this reason I am interested in the construction of the canal. It is pleasure to me to talk to you, as know you are all prac tica1 men who know what it is to buck against the forces of nature. We mean business, and intend to build this canal if you show due interest in it: and as it will make your country one of the most productive i'll the world, I am satisfied your own good sense will make you anxious to