Page 99


Page 99
Colorado River problem
Is Part Of,8
Full text
404 SMITH ON THE COLORADO RIVER PROBLEM sidered an average. Actual losses will be higher in the lower desert region below Boulder Canyon than in the Canyon Section proper. Plan A, Fig. 22, exclusive of the Parker Dam, was first suggested by the writer in his February, 1924, report. That plan, with the Parker Dam included, presents the best scheme of development for the lower river as a whole. Its outstanding advantage is that it supplies the needed storage capacity with a minimum evaporation loss. It provides superior flood control by regulating Williams River, and it entails a minimum destruction of irrigable areas. The cost of construction is the lowest of all the plans, both under present and future conditions. With only partial control, such as will actually exist, the power output for these plans with small storage capacity would suffer far more severely than Plan A. The cost of the Parker Dam is included in the total cost of this plan. It would provide a much needed diversion for Parker Valley and for contemplated irrigation of the higher lands below. G. E. P. Smith,* M. Am. Soc. C. E. (by letter).—There is no subject more timely, especially to the Southwest, than the one under discussion. Perhaps no other great undertaking, of immediate concern, involves so many engineering problems of a controversial nature, and none is more worthy of the assistance which results from open discussion by the Society. The author is to be thanked for presenting clearly the viewpoint of the staff of the Federal Power Commission. Among those who have studied the problems of the. Colorado, is the U. S. Reclamation Service, which has carried on investigations and studies of the highest importance, including the testing of many foundations, for twelve years. Likewise, the pioneering and other investigations of E. C. La Rue, M. Am. Soc. C. E., have been most valuable. The State of Arizona has been somewhat laggard in this regard. However, it organized, in 1922, the Arizona Engineering Commission to make a reconnaissance study of the irrigation possibilities from the Colorado River within the State. This Commission, of which Mr. La Rue was Chairman, reported in July, 1923. The Legislature of 1923 made a special appropriation of $14,000 for hydrometric work on the Colorado for the biennium 1923-25; an initiated measure authorizing extensive studies of the Colorado and appropriating $100,000 for the purpose, was also voted on in the November, 1924, elections. As a large part of the potential water power of the Colorado lies within Arizona, this State will exercise considerable control over the development program. Within its boundaries, the State has control over the appropriation of water for irrigation and other uses, and, also, has control over the stream and its bed in all matters not related to navigation. The Federal Government, by reason of its ownership of abutting lands, also can exercise control over the proposed developments, which control is exercised through the Federal Power Commission. The State and the Federal Governments, therefore, must cooperate in the control of the power development of the river. Inasmuch as * Prof, of Irrig. Eng., Univ. of Arizona, Tucson, Ariz.

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