11523200 TRINITY RIVER ABOVE COFFEE CREEK, NEAR TRINITY CENTER, CA. Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1958 - 2000, BY WATER YEAR (WY)

         OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
MEAN    76.8      210      335      463      581      671      861     1066      513      135     55.8     44.9
MAX      447     1664     1726     1899     2248     1641     1558     2414     2159      778      205      134
(WY)    1963     1974     1965     1974     1958     1995     2000     1983     1998     1983     1983     1978
MIN     24.3     37.4     34.1     35.9     47.2     60.0      137      204     95.7     29.0     20.9     23.3
(WY)    1992     1977     1977     1977     1977     1977     1977     1977     1977     1977     1977     1994

SUMMARY STATISTICS         FOR 1999 CALENDAR YEAR          FOR 2000 WATER YEAR          WATER YEARS 1958 - 2000
ANNUAL TOTAL                               156982                       189494
ANNUAL MEAN                                   430                          518                              417
HIGHEST ANNUAL MEAN                                                                                   851  1974
LOWEST ANNUAL MEAN                                                                                   66.2  1977
HIGHEST DAILY MEAN                    2550 May 25                  3830 Apr 13               18900 Jan 16  1974
LOWEST DAILY MEAN                        22 Nov 3                     22 Nov 3                  16 Sep 11  1977
ANNUAL SEVEN-DAY MINIMUM                24 Oct 31                    24 Oct 31                   16 Sep 8  1977
INSTANTANEOUS PEAK FLOW                                            5290 Apr 13               26500 Jan 16  1974
INSTANTANEOUS PEAK STAGE                                           9.49 Apr 13                16.82 Jan 1  1997
ANNUAL RUNOFF (AC-FT)                      311400                       375900                           301800
10 PERCENT EXCEEDS                           1170                         1320                             1060
50 PERCENT EXCEEDS                            207                          212                              176
90 PERCENT EXCEEDS                             37                           39                               38