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000467 July 20 27 55 August 20 27 55 September 20 4 55 October 20 4 37 November 20 4 37 December 15 4 37 On the Rio Blanco, these bypass requirements are similar to the instream flow water rights held by the Colorado Water Conservation Board (CWCB). The CWCB rights are for 29 cfs from May 1 through September 30 and 20 cfs for the remainder of the year. On the Navajo River, the bypass requirements are also similar to the CWCB instream flow rights, 55 cfs from May 1 through September 30 and 37 ets for the remaining months. There are no CWCB instream flow rights on the Little Navajo River. The San Juan-Chama Project does not have any decreed water rights and are not listed in the State Engineer's tabulation of water rights. The Division 7 Engineer administers these rights as being the most junior water right on the stream (i.e. a 1995 priority date) and the CROSS Water Resources Planning Model (WRPM) represents the Project accordingly. Generally, the minimum bypass requirements shown above are sufficiently high to protect the diversions of the other existing water rights on these tributary streams. For purposes of the CROSS Water Rights Planning Model, the monthly minimum bypass at each headgate is assumed to be the greater of the legislated bypass flows shown above or the CWCB instream flow rights. The historic monthly diversions at each of the diversion structures were obtained from the USSR and are incorporated into the CROSS WRPM to represent historic conditions over the 1975 through 1991 study period. For future planning scenarios, the San Juan-Chama Project diversions should reflect the 1995 priority date and the minimum bypass requirements discussed above. The diversions should also be limited by the following structure capacities, based on the USBR's design capacities of the various diversion works: Rio Blanco Little Navajo Navajo River (WOlD 294667) (WOlD 774636) (WOlD 774635) 520ets 1 50 ets 650 cfs Azotea Tunnel Capacity 950 cfs 2