10260700 EAST FORK OF WEST FORK MOJAVE RIVER ABOVE SILVERWOOD LAKE, NEAR HESPERIA, CA

LOCATION.-Lat 34°16'13", long 117°17'31", in NW 1/4 SW 1/4 sec.10, T.2 N., R.4 W., San Bernardino County, Hydrologic Unit 18090208, San Bernardino National Forest, on right bank 0.8 mi downstream from Houston Creek, 1.5 mi upstream from Silverwood Lake, and 10.8 mi south of Hesperia. 
DRAINAGE AREA.-11.2 mi2. 
PERIOD OF RECORD.-October 1995 to current year. Unpublished records for water years 1961-95 available in files of the California Department of Water Resources. 
GAGE.-Water-stage recorder and concrete control. Elevation of gage is 3,590 ft above sea level, from topographic map. 
REMARKS.-Flow slightly regulated by Lake Gregory 3.2 mi upstream. 
COOPERATION.-Records were collected by California Department of Water Resources, under general supervision of the U.S. Geological Survey, in connection with a Federal Energy Regulatory Commission project. 
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 1,440 ft3/s, Feb. 23, 1998, gage height, 6.92 ft; no flow for many days in each year. 

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                                               DAILY MEAN VALUES
 
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
  1       .00      .00      .48      .56      4.4       37       51       22     25        9       2.2       .81
  2       .00      .00      .35      .52      3.9       37       39       22     24        9.9     1.9       .53
  3       .00      .00      .32      .69     23         33       40       23     24        9.2     1.9       .6 
  4       .00      .00      .28     1.1      24         30       38       35     24        8.2     1.7       .64
  5       .00      .00      .28     1.4      15         29       35      131     23        7.6     1.7       .68
  6       .00      .00     6.4      1.1     117         53       42       93     22        7.3     1.6       .6 
  7       .00      .00     4.5       .99    160         37       48       60     22        7       1.5       .52
  8       .00      .00     4.1       .94    267         30       50       47     21        6.7     1.5       .48
  9       .00      .00     1.8      6.6      74         27       49       41     21        6.5     1.5       .46
 10       .00      .13     1.3     43        38         25       47       37     20        6.5     1.5     35   
 
 11       .00      .24     1.0     14        24         23       75       34     21        6       1.5     18   
 12       .00      .00      .91     8.8      16         21      106      116     22        5.7     1.3      5.5 
 13       .00      .40      .83     6.4      14         22       74      171     21        5.3     1.3      2.7 
 14       .00      .63      .81     4.9      40         28       64      107     19        4.8     1.3      1.6 
 15       .00      .16      .74     4.1      40         25       55       86     18        4.6     1.1      1   
 16       .00      .11      .73     3.5      25         23       48       74     18        4.3     1         .69
 17       .00      .10      .67     3.0      25         21       42       61     17        4.3     1         .51
 18       .00      .10      .65     2.7      21         20       39       52     16        4.1      .98      .43
 19       .00      .11      .59     9.9      20         19       37       47     16        4.1      .86      .38
 20       .00      .11      .56     7.0      24         18       35       43     15        4        .83      .38
 
 21       .00      .11      .71     5.2      20         17       34       39     14        3.9      .79      .49
 22       .00      .11      .66     4.2      89         15       33       37     14        4        .75      .51
 23       .00      .11      .56     3.6     577         14       31       35     13        4        .71      .5 
 24       .00      .11      .56     3.2     461         14       29       33     12        3.7      .65      .52
 25       .00      .12      .56     2.9     112         63       28       32     12        3.5      .63      .52
 26       .00     2.4       .56     2.7      60         45       27       33     11        3.3      .54      .52
 27       .00     1.7       .54     2.5      43         54       25       30     11        3        .47      .54
 28       .00      .51      .56     2.2      37        198       24       28     10        2.7      .42      .54
 29       .00      .38      .56     5.6       ---       88       23       27      9.5      2.6      .4       .52
 30       .00      .36      .56     6.0       ---       60       23       27      9        2.5      .38      .53
 31       .00      ---      .56     4.7       ---       53      ---       26      ---      2.4      .44      ---
 
TOTAL    0.00     8.00    33.69   164.00   2374.3     1179     1291     1649    524.5    160.7    34.35    76.70
MEAN     .000      .27     1.09     5.29     84.8     38.0     43.0     53.2     17.5     5.18     1.11     2.56
MAX       .00      2.4      6.4       43      577      198      106      171       25      9.9      2.2       35
MIN       .00      .00      .28      .52      3.9       14       23       22      9.0      2.4      .38      .38
AC-FT     .00       16       67      325     4710     2340     2560     3270     1040      319       68      152
 


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1996 - 1998, BY WATER YEAR (WY)                                 
  
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
MEAN     .065      .91     3.69     12.0     40.3     20.7     16.3     18.4     6.02     1.73      .37      .85
MAX       .13     2.10     9.36     29.5     84.8     38.0     43.0     53.2     17.5     5.18     1.11     2.56
(WY)     1996     1997     1997     1997     1998     1998     1998     1998     1998     1998     1998     1998
MIN      .000      .27      .61     1.27     10.6     4.76     1.89      .65      .17     .001     .000     .000
(WY)     1998     1998     1996     1996     1997     1997     1997     1997     1997     1997     1996     1996
 
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1996 - 1998
 
ANNUAL TOTAL                        1482.44                    7495.24                                          
ANNUAL MEAN                            4.06                      20.5                        9.94               
HIGHEST ANNUAL MEAN                                                                         20.5            1998
LOWEST ANNUAL MEAN                                                                           4.37           1996
  HIGHEST DAILY MEAN                   231     Jan 26             577     Feb 23             577       Feb 23 1998
  LOWEST DAILY MEAN                       .00  Jul  3                .00  Oct  1                .00    Jul 12 1996
  ANNUAL SEVEN-DAY MINIMUM                .00  Jul  3                .00  Oct  1                .00    Jul 12 1996
  INSTANTANEOUS PEAK FLOW                                        1440     Feb 23            1440       Feb 23 1998
  INSTANTANEOUS PEAK STAGE                                          6.92  Feb 23               6.92    Feb 23 1998
ANNUAL RUNOFF (AC-FT)               2940                      14870                       7200                  
10 PERCENT EXCEEDS                    10                         47                         25                  
50 PERCENT EXCEEDS                      .36                       4.3                         .78               
90 PERCENT EXCEEDS                      .00                        .00                        .00