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flows if sufficient magnitude to mobilize rooted substrates ... Rare large peaks (greater <br />than 10,000 cfs) preclude permanent encroachment of large woody vegetation on <br />dominant lateral gravel bars, while smaller annual peaks (2,500 — 10,000 cfs) maximize <br />the extent of the dynamic vegetation free zone within the narrow active channel. " <br />Hydrologic Data <br />The Bureau of Reclamation (BR) conducted an evaluation of the stream hydrology to determine <br />if water was 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 />Flows in Acre -Feet Total <br />Year Mav June July Mav - Julv <br />1975 <br />141791 <br />103387 <br />95506 <br />340684 <br />1976 <br />30179 <br />40545 <br />57860 <br />128584 <br />1977 <br />18343 <br />17727 <br />18310 <br />54380 <br />1978 <br />135492 <br />120986 <br />59669 <br />316147 <br />1979 <br />141972 <br />115482 <br />79882 <br />337336 <br />1980 <br />146399 <br />146607 <br />88110 <br />381116 <br />1981 <br />19935 <br />17727 <br />18310 <br />55972 <br />1982 <br />118355 <br />92980 <br />66054 <br />277389 <br />1983 <br />93539 <br />199378 <br />242989 <br />535906 <br />1984 <br />262462 <br />478064 <br />298962 <br />1039488 <br />1985 <br />164897 <br />378896 <br />143499 <br />687292 <br />1986 <br />150758 <br />129431 <br />201368 <br />481557 <br />1987 <br />69698 <br />183161 <br />83163 <br />336022 <br />1988 <br />27923 <br />31988 <br />49280 <br />109191 <br />1989 <br />28236 <br />36004 <br />47230 <br />111470 <br />1990 <br />18343 <br />26827 <br />38958 <br />84128 <br />1991 <br />77807 <br />139721 <br />69040 <br />286568 <br />1992 <br />42136 <br />46467 <br />51523 <br />140126 <br />1993 <br />194858 <br />239546 <br />153105 <br />587509 <br />1994 <br />26575 <br />46532 <br />52386 <br />125493 <br />1995 <br />205489 <br />304903 <br />504952 <br />1015344 <br />1996 <br />114058 <br />124860 <br />74161 <br />313079 <br />1997 <br />159510 <br />282333 <br />123103 <br />564946 <br />1998 <br />61992 <br />46218 <br />55003 <br />163213 <br />1999 <br />47040 <br />114316 <br />93644 <br />255000 <br />2000 <br />36493 1 <br />38935 1 <br />48871 1 <br />124299 <br />Average 97472 134732 108267 340471 <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 instream flow water right to support the <br />recommended flows. <br />