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<br />Oll18" <br /> <br />. <br /> <br />RIO BLANCO TOTAL WATER SUPPLY, 1942 - 1957 <br /> <br />Total Supply <br /> <br />1 ,063,900 acre-feet <br /> <br />ReqUired By-Pass <br /> <br />223,200 <br /> <br />Spills above diversion capacity <br /> <br />69,600 <br /> <br />Spills above conduit capacity <br /> <br />49,700 <br /> <br />Sub Total 342 , 500 <br /> <br />Water Diverted 721,400 acre-feet <br /> <br />721,400 = 68% <br />1, 063, 900 <br /> <br />The collection system for the initial stage of the San Juan-Chama <br /> <br />project must be large enough to carry the water available for diversion <br /> <br />. at the various diversion sites. The high flow months on the Navajo <br /> <br />River and the Rio Blanco are the same. The proj ect neces sarily depends <br /> <br />on the high runoff months for enough water to operate because of the <br /> <br />neceSSity of by-passing required flows in months ot low runoff. The <br /> <br />Rio Blanco diversion canal has a capacity of 460 cfs; the Navajo River <br /> <br />diversion canal carries 700 cfs; the collection conduit from the Navajo <br /> <br />River to the Azotea Portal has a capacity of 850 cfs. Under the operat- <br /> <br />ing criteria eliminating all spills at the Navajo River diversion dam site, <br /> <br />there are many months when the Navajo River diversion canal will flow <br /> <br />at 700 cfs leaving only 150 cfs to be collected from the Little Navajo <br /> <br />and Rio Blanco diversion facilities. In order to eliminate the excess <br /> <br />. <br /> <br />- 15 - <br /> <br />"" ,.,;; <br />