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<br />when needed, she would have as a certainty all that she <br />had been able to obtain on the average under natural <br />flow conditions and the risl~ of loss in years of shortage <br />would be eliminated. Thus the stability of her agricul- <br />ture would be greatly enhanced. <br />The course of development of the lands in the live <br />delta, the area designated as class (b), has been sporadic. <br />Prior to the construction of Boulder Dam, a few thousand <br />acres were temporarily irrigated in the Volcano Lake area; <br />about eight thousand acres in Sonora lying on the East of <br />the old river channel had been fairly regularly irrigated <br />from drainage waters of the Yuma Project, Arizona; and <br />attempts had been made to develop other areas in the live <br />delta, which attempts were shortly frustrated by floods, <br />river meanderings and silt. Following control of the <br />River by Boulder Dam in 1935, considerable development of, <br />easily reclaimed areas in the live delta was undertaken. <br />About 100 pumping plants have been installed at various <br />points along the river, its side channels and sloughs. <br />These installations and the canals and structures used <br />to irrigate a large number of small, scattered tracts, <br />are of a most temporary character. Irrigation has been <br />carried on with great difficulty. The river channel has <br />shifted in many places; even small increases in the regu- <br />lated river flow from Boulder have flooded large areas; <br /> <br />- 15 - <br />