                                                LOS ANGELES COUNTY DEPARTMENT OF PUBLIC WORKS
                   F312-R       SAN JOSE CHANNEL ABOVE WORKMAN MILL ROAD                               RATING NO.   78-1
                                         MEAN DAILY DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR 1991

   DAY      OCT        NOV        DEC        JAN        FEB        MAR        APR        MAY        JUN        JUL        AUG        SEP
 ------------------------------------------------------------------------------------------------------------------------------------------
    1      139.0      127.0        8.9       13.5       13.7    1,960.0       25.7       12.1        7.8       13.5       10.1      139.0
    2      139.0      127.0        8.8       13.8       13.0       38.9       18.1       14.1        9.0       12.9       11.5      138.0
    3      131.0      128.0        7.8      433.0       11.7       20.8       19.7       15.3        9.9        9.4       11.7      136.0
    4      127.0      132.0        8.8      863.0       11.1       92.3       16.9       15.8        7.7        9.5       10.2      143.0
    5      124.0      135.0        8.6      178.0       11.2       45.2       16.4       15.1        8.1        8.9       12.1      141.0

 ------------------------------------------------------------------------------------------------------------------------------------------
   6       118.0      132.0       11.3       19.1       10.7       15.3       17.5       15.2        7.3        8.6       13.6      142.0
   7       118.0      132.0       11.3       19.1       10.7       15.3       17.5       15.2        7.3        8.6       13.6      142.0
   8       108.0        7.7       12.7       14.9        9.6       15.7       18.1       11.1        9.1       15.5        9.5      145.0
   9       109.0        7.5       12.2      313.0       12.8       16.1       16.8       10.6       12.4       10.1        9.6      144.0
   10      122.0        8.2       10.3       13.9       11.6       16.2       15.3       25.7       10.3        9.7        9.7      143.0

 ------------------------------------------------------------------------------------------------------------------------------------------
   11      139.0       11.0       13.4       12.9       10.4       29.0       13.7       12.3        8.3        9.7        9.7      141.0
   12      134.0       12.3       29.1       12.4       10.1       14.6       15.9       13.3        8.4        9.0       11.0      143.0
   13      129.0        9.9       11.2       11.4       11.3      231.0       17.5       12.5        8.5        9.7        9.8      143.0
   14      126.0       11.2        8.5       12.3       12.9       22.0       16.7       10.4        8.6        9.6       10.0      145.0
   15      126.0       10.6        9.3       12.1       12.2       13.4       16.5       11.8       10.7        9.4       10.4      148.0

 ------------------------------------------------------------------------------------------------------------------------------------------
   16      121.0       10.3        9.1       11.7       12.9       13.8       16.9       10.5       12.3       10.0        9.9      149.0
   17      123.0       10.1       10.8       12.4       10.8       12.0       15.3        9.8       10.8       10.0       10.3      149.0
   18       20.6       11.1       12.7       12.2       11.1      101.0       14.2       11.2        9.8       10.2       12.1      147.0
   19       13.5       14.9        9.7       14.8       11.3      837.0       15.7       14.3        8.7       11.0       12.4      147.0
   20       13.3      106.0       13.3       14.0       10.8      696.0       17.9       11.6        8.7       13.1       10.7      149.0

 ------------------------------------------------------------------------------------------------------------------------------------------
   21       13.2       10.2       11.6       16.4       10.9       18.4       18.1       12.4        9.0       11.5       11.5      152.0
   22      131.0        9.7       10.6       13.3       12.6       13.6       17.2       11.7       12.5       10.8       10.0      151.0
   23      141.0        8.7       13.1       12.3       12.4       13.0       16.7        9.1       11.3        9.3       10.8      152.0
   24      128.0        9.3       12.9       13.8       14.1       12.6       14.8        9.4       14.1        9.9       11.0      152.0
   25      117.0       11.5       14.5       13.5       12.6      540.0       18.3        9.1       11.1       11.4       11.1      151.0

 ------------------------------------------------------------------------------------------------------------------------------------------
   26      128.0       29.6       14.4       14.6       12.3      969.0       15.6        9.7       10.8       10.4       11.7      152.0
   27      135.0       10.3       10.9       14.4    1,670.0    1,010.0       15.5       10.4       11.8       10.5       10.2      151.0
   28      130.0        8.7       12.3       13.3    1,960.0       27.5       17.1        9.1       11.2       10.0       37.6      151.0
   29      129.0        7.8       13.9       12.8         .0       20.9       16.3        9.9       11.7       10.2      137.0      152.0
   30      131.0        8.2       11.3       10.8         .0       17.1       13.7        9.6       13.1       10.8      136.0      154.0
   31      131.0         .0       12.3       12.1         .0       15.1         .0       12.1         .0       11.2      136.0         .0

 ==========================================================================================================================================
 TOTAL   3,486.6    1,238.8      365.1    2,153.2    3,934.6    6,863.2      505.2      378.0       300.1      325.0      738.5   4,393.0
 MEAN      112.5       41.3       11.8       69.5      140.5      221.3       16.8       12.2       10.0       10.5       23.8      146.4
 MAX       141.0      135.0       29.1      863.0    1,960.0    1,960.0       25.7       25.7       14.1       15.5      137.0      154.0
 MIN        13.2        7.5        7.8       10.8        9.6       12.0       13.7        9.1        7.1        8.6        9.5      136.0

 ANNUAL DATA
 WTR YEAR 1991 TOTAL IN A.F.  ANNUAL TOTAL IN CFS  ANNUAL AVERAGE DAILY IN CFS  ANNUAL MAXIMUM DAILY IN CFS  ANNUAL MINIMUM DAILY IN CFS
 ---------------------------  -------------------  ---------------------------  ---------------------------  ---------------------------
                    48,954.6             24,681.3                         68.0                      1,960.0                          7.1

 INSTANTANEOUS DATA
 INST_MAXFLOW    7,270.0      INST_MAXTIME  0345            INST_MAXDATE  03/01/91
 INST_MINFLOW         .0      INST_MINTIME  0000            INST_MINDATE

