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. . DRAFr 10/5/95 COLORADO WATER CONSERVATION BOARD RECOVERY INSTREAM FLOW APPROPRIATION OPTIONS Option III - Yampa River Instream Flow Appropriation The following is one of several options which have been developed through extensive consultations over the last year among representatives of the Colorado Water Conservation Board (CWCB), State Engineer and Division Engineers, Attorney General, Colorado River Water Conservation District, Colorado Water Congress, U.S. Fish and Wildlife Service (FWS), and many other water interests for consideration by the CWCB in late 1995 as a part of its efforts to appropriate endangered fish recovery instream flows in the Yampa River. Concept An instream flow right consisting of all available flow, except for a development allowance, is appropriated. A Base Flow component is included in the instream t10w right during the non runoff months at the 80% exceedance level. Month Oct Nov Dee Jan Feb Mar Apr - Jul SO%Exe.88 172 157 187'..22t 305 Aug Sep 125 45 A development allowance ranging from approximately 52,000 af to 225,000 af is provided to allow developmenI of Colorado's unused compact apportionment. The development allowance consists of a Carve Out and a Modifiable Portion (Paragraph 4). - The Carve Out distributed on a monthly basis, is excluded from the instream flow appropriation so that it remains available for use by both water rights junior to the instream flow appropriation. The Carve Out, consisting of 52,000 af is distributed on the following monthly basis: Month Oet Nov Dee Jan Feb Mar Apr May Jun Jul Ang Sep cfs. 63 39 40 42 48 50 115 95 98 111 90 69 The junior water rights within the Carve Out will not be called out by the instream flow right. Junior water rights developed in excess of the Carve Out may be called out.. Option III-I