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BOARD01926
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Last modified
8/16/2009 3:08:52 PM
Creation date
10/4/2006 7:04:48 AM
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Board Meetings
Board Meeting Date
1/27/2004
Description
ISF Section - Instream Flow Appropriations - West Antelope Creek
Board Meetings - Doc Type
Memo
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<br />Table 2 shows that the summer flow recommendation of 1.65 cfs is available at least 50% of the <br />time from March 15th through August 31". Table 2 also shows that the winter flow <br />recommendation of 1.2 cfs is only available at least 50% of the time from September 1" through <br />January 14th. The winter flow recommendation was further reduced to 1.1 cfs for the time period <br />of January 15th through March 14th based on limited water availability. <br /> <br />Precipitation Data <br />Staff reviewed a 10cal precipitation data set 10cated near Gunnison (see Precipitation Data in <br />Appendix C). Table 3 shows the water year and the percent of average precipitation recorded at <br />this site. <br /> <br />Table 3: Precipitation Data as a percentage of Average. <br /> <br /> Elevation - 7,630 <br /> Lat 38 33 00 <br /> Long 106 55 00 <br />Year Gunnison <br />1955 62 <br />1956 352 <br />1957 343 <br />1958 78 <br />1959 38 <br />1960 90 <br />1961 18 <br />1962 88 <br />1963 111 <br />1964 32 <br />1965 73 <br />1966 40 <br />Avera~e 109% <br /> <br />It is staffs opinion that the 11 years of stream-flow data analyzed is representative of slightly <br />above average water-years. <br /> <br />Existing Water Right Information <br /> <br />Staff has analyzed the water rights tabulation and consulted with the Division Engineer Office <br />(DEO) to identifY any potential water availability problems. There are no decreed surface <br />diversions within this reach of stream. According to the DEO, there are two decreed points of <br />diversion 10cated below the proposed ISF reach (Dooley Antelope Irrigation Ditch and Sunshine <br />Irrigation Ditch). Based on this analysis staff has determined that water is available for <br />appropriation on West Antelope Creek, between the headwaters and the Dooley Antelope <br />Irrigation Ditch, to preserve the natural environment to a reasonable degree without limiting or <br />foreclosing the exercise of valid existing water rights. <br /> <br />- 5 - <br />
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