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<br />dominant lateral gravel bars, while smaller annual peaks (2.500 - 10,000 cft) maximize <br />the extent of the dynamic vegetation-free zone within the narrow active channel, .. <br /> <br />Hydrologic Data <br /> <br />The Bureau of Reclamation (BR) conducted an evaluation of the stream hydrology to determine <br />if water is physically available for an instream flow appropriation, Figure 1 below shows the <br />results of Reclamation model runs, using historical data and current operating conditions: <br /> <br />Flows in Acre-Feet <br /> <br />Total <br /> <br />Year Mav June July May - July <br />1975 141791 103387 95506 340684 <br />1976 30179 40545 57860 128584 <br />1977 18343 17727 18310 54380 <br />1978 135492 120986 59669 316147 <br />1979 141972 115482 79882 337336 <br />1980 146399 146607 88110 381116 <br />1981 19935 17727 18310 55972 <br />1982 118355 92980 66054 277389 <br />1983 93539 199378 242989 535906 <br />1984 262462 478064 298962 1039488 <br />1985 164897 378896 143499 687292 <br />1986 150758 129431 201368 481557 <br />1987 69698 183161 83163 336022 <br />1988 27923 31988 49280 109191 <br />1989 28236 36004 47230 111470 <br />1990 18343 26827 38958 84128 <br />1991 77807 139721 69040 286568 <br />1992 42136 46467 51523 140126 <br />1993 194858 239546 153105 587509 <br />1994 26575 46532 52386 125493 <br />1995 205489 304903 504952 1015344 <br />1996 114058 124860 74161 313079 <br />1997 159510 282333 123103 564946 <br />1998 61992 46218 55003 163213 <br />1999 47040 114316 93644 255000 <br />2000 36493 38935 48871 124299 <br /> <br />Average 97472 <br /> <br />134732 108267 <br /> <br />340471 <br /> <br />According to the BR, these model runs establish that there is sufficient water available at the <br />upper terminus (USGS gage #09128000) of the proposed instrcam flow water right to support the <br />recommended flows, <br /> <br />Existing Water Right Information <br /> <br />Staff has analyzed the water rights tabulation and consulted with the Division Engineer to <br />identify any potential water availability problems, Based on this analysis, staff has determined <br />that water is available for appropriation on the Gunnison River, from the USGS Gage #09128000 <br />located below the Gunnison Diversion Dam to the confluence with the North Fork of the <br />Guunison River, to preserve the natural environment to a reasonable degree without limiting or <br />foreclosing the exerciSe of valid existing water rights, <br /> <br />-4- <br />