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<br />OO~1H <br /> <br />'" <br /> <br />CHAPTER I <br /> <br />PLANS OF DEVELOPMENT <br /> <br />Thirteen plans of development for the South San Juan project are <br />described in this chapter. Plan A is entirely distinct since it would <br />divert and use water in a different part of the San Juan River Basin <br />than the other plans. Plans D-l to D-6, inclusive, for hydra.ulic- <br />powered pumping and Plans E-l to E-6, inclusive, for electric-powered <br />pumping are closely related. Each would smre in the use of the stor- <br />age and diversion facilities planned by the Bureau of Indian Affairs <br />for its Shiprock project. <br /> <br />. <br /> <br />Under the electric pumping plan, water for the South San Juan <br />project lands would be conveyed from Navajo Reservoir through an en- <br />larged Shiprock project gravity canal to the pump location. Under the <br />direct-connected hydraulic-turbine :pumping plan, water would be diverted <br />for the Sotlth San Juan and Shiprock projects from the Navajo Reservoir <br />through a h.ighline canal to a point about 28 miles below Navajo D3.m. <br />Here water for the Shiprock project would be dropped to the Shiprock <br />main gravity ca.nal through the pumping plant and thus used fc,r lifting <br />water to the South San Juan project lands. The elevation of the high- <br />line ca.nal diverting from Navajo Reservoir was adjusted in such a man- <br />ner that the water for the Shiprock project, when dropped to the Shiprock <br />project gravity canal, would providE! sufficient energy to OPerate the <br />turbines for lifting the water to the re'l.uired elevation for the South <br />San Juan pJ:'oject lands. <br /> <br />The water supply available for the Shiprock and South San Juan <br />projects was assumed to be that remaining in the San Juan River after <br />allowances were made for existing development, potential within-basin <br />projects, and the potential Weminuche Pass diversions to San Luis <br />Valley as more fully discussed in Chapter III. Since the analyses were <br />made for compl.rative purposes, no aHowance was made for the potential <br />San Juan-Cha.ma transmountain diversion to the Rio Grande Basin. <br /> <br />Plan A <br /> <br />Plan A was one of the first plans studied in the reconnaissance <br />investigation of the South 8an Juan project. Its general layout is <br />shown on IlJ:'awing No. 524-406-95 on the following page. <br /> <br />. <br /> <br />The plan' involves the construction of five storage re6e:t"voirs and <br />a long canal system. The ca.nal system would intercept the h"adwaters <br />of San Juan River and its tributaries at several points in Colorado <br />above ell'lvation 7,500 feet and by gt'avity flow would convey the water <br /> <br />