10260550 WEST FORK MOJAVE RIVER ABOVE SILVERWOOD LAKE, NEAR HESPERIA, CA

LOCATION.-Lat 34°17'06", long 117°22'16", in NW 1/4 SE 1/4 sec.2, T.2 N., R.5 W., San Bernardino County, Hydrologic Unit 18090208, San Bernardino National Forest, on left bank 1.5 mi upstream from Silverwood Lake, and 10.6 mi southwest of Hesperia. 
DRAINAGE AREA.-3.22 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 Unpublished records for water years 1961-95 available in files of the California Department of Water Resources.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 3,550 ft above sea level, from topographic map. 
REMARKS.-No regulation or diversion upstream from station. 
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, 584 ft3/s, Feb. 23, 1998, gage height, 3.88 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      .14      .28      .92     17       14        5.8      8.8     3.2       .82      .29
  2       .00      .00      .16      .27      .92     15       15        5.6      8.5     3.1       .77      .24
  3       .00      .00      .16      .41     6.5      13       15        5.8      8.3     3         .73      .26
  4       .00      .00      .16      .56     6        12       14        6.4      8.5     2.9       .7       .32
  5       .00      .00      .17      .63     3.2      12       13       29        7.9     2.7       .67      .34
  6       .00      .00     2         .50    19        23       13       50        7.4     2.6       .65      .29
  7       .00      .00     1.9       .48    33        16       13       24        7.4     2.6       .63      .26
  8       .00      .00     1.5       .48    43        14       12       17        7.6     2.5       .61      .24
  9       .00      .00      .98     3.3     17        13       11       15        7.2     2.4       .56      .23
 10       .00      .11      .76    12        9.7      12       11       14        6.7     2.3       .63      .23
 
 11       .00      .09      .64     3.2      6.8      11       15       13        7       2.2       .58      .22
 12       .00      .06      .57     2        5.3      11       15       27        6.9     1.9       .49      .21
 13       .00      .07      .53     1.6      4.5      10       13       46        6.5     1.8       .55      .24
 14       .00      .06      .48     1.3      8.8      11       12       32        6.1     1.8       .49      .18
 15       .00      .05      .44     1.1      8.3      10       12       25        5.9     1.7       .44      .13
 16       .00      .05      .43     1        6         8.8     11       22        5.9     1.6       .4       .13
 17       .00      .05      .39      .93     7.7       8.1     10       20        5.6     1.5       .4       .13
 18       .00      .04      .39      .86     6.4       7.5      9.3     18        5.2     1.5       .39      .13
 19       .00      .04      .36     2.2      5.7       7        8.9     16        5       1.4       .37      .14
 20       .00      .04      .35     1.5      7.3       6.4      8.5     15        4.8     1.4       .35      .18
 
 21       .00      .04      .41     1.3      5.8       6.1      7.9     14        4.6     1.4       .32      .25
 22       .00      .03      .35     1.2     19         5.7      7.5     13        4.6     1.4       .29      .28
 23       .00      .03      .31     1.1    278         5.2      7.2     12        4.5     1.3       .25      .31
 24       .00      .04      .31     1      117         5.3      7.2     12        4.4     1.2       .21      .32
 25       .00      .04      .31      .92    43        17        7.4     12        4.2     1.1       .19      .35
 26       .00      .11      .28      .87    30        13        7.2     12        4.1     1.1       .18      .37
 27       .00      .08      .28      .82    24        16        7       11        3.9     1         .2       .41
 28       .00      .07      .28      .78    20        32        6.5     10        3.8      .97      .17      .37
 29       .00      .06      .28     1.1       ---     20        6.4     10        3.6      .91      .15      .36
 30       .00      .07      .28     1         ---     15        6.1      9.7      3.4      .89      .13      .34
 31       .00      ---      .28      .98      ---     14        ---      9        ---      .86      .23      ---
 
TOTAL    0.00     1.23    15.88    45.67   742.84    387.1    316.1    531.3    178.3    56.23    13.55     7.75
MEAN     .000     .041      .51     1.47     26.5     12.5     10.5     17.1     5.94     1.81      .44      .26
MAX       .00      .11      2.0       12      278       32       15       50      8.8      3.2      .82      .41
MIN       .00      .00      .14      .27      .92      5.2      6.1      5.6      3.4      .86      .13      .13
AC-FT     .00      2.4       31       91     1470      768      627     1050      354      112       27       15
 


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     .025      .12     1.77     4.97     13.6     6.98     4.57     6.17     2.12      .61      .15     .086
MAX      .065      .19     4.49     12.8     26.5     12.5     10.5     17.1     5.94     1.81      .44      .26
(WY)     1996     1997     1997     1997     1998     1998     1998     1998     1998     1998     1998     1998
MIN      .000     .041      .31      .66     5.40     2.03     1.03      .48      .13     .000     .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                         676.70                    2295.95                                          
ANNUAL MEAN                            1.85                       6.29                       3.37               
HIGHEST ANNUAL MEAN                                                                          6.29           1998
LOWEST ANNUAL MEAN                                                                           1.63           1996
  HIGHEST DAILY MEAN                    78     Jan 26             278     Feb 23             278       Feb 23 1998
  LOWEST DAILY MEAN                       .00  Jun 29                .00  Oct  1                .00    Jul  7 1996
  ANNUAL SEVEN-DAY MINIMUM                .00  Jun 29                .00  Oct  1                .00    Jul  7 1996
  INSTANTANEOUS PEAK FLOW                                         584     Feb 23             584       Feb 23 1998
  INSTANTANEOUS PEAK STAGE                                          3.88  Feb 23               3.88    Feb 23 1998
ANNUAL RUNOFF (AC-FT)               1340                       4550                       2440                  
10 PERCENT EXCEEDS                     4.9                       15                          8.9                
50 PERCENT EXCEEDS                      .20                       1.3                         .39               
90 PERCENT EXCEEDS                      .00                        .00                        .00