10270800 SOUTH FORK BISHOP CREEK BELOW SOUTH LAKE, NEAR BISHOP, CA

LOCATION.-Lat 37°10'38", long 118°33'44", unsurveyed, T.9 S., R.31 E., Inyo County, Hydrologic Unit 18090102, Inyo National Forest, on right bank near weir on Weir Lake, 0.3 mi downstream from South Lake, and 15.7 mi southwest of Bishop. 
DRAINAGE AREA.-13.4 mi2. 
PERIOD OF RECORD.-October 1990 to current year. Unpublished records prior to October 1990 available in files of Southern California Edison Co. 
GAGE.-Water-stage recorder and sharp-crested weir. Elevation of gage is 9,580 ft above sea level, from topographic map. 
REMARKS.-Flow regulated by South Lake (station 10270700). Green Creek Conduit (station 10270680) diverts water into basin at South Lake. Water is used for power development downstream. See schematic diagram of Bishop Creek Basin. 
COOPERATION.-Records collected by Southern California Edison Co., 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, 142 ft3/s, July 31, 1995, gage height, 1.44 ft; minimum daily, 6.7 ft3/s, Apr. 4, 1994. 

                  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        34       40       36       34       33       31       47       15       16       22       69       45
  2        35       43       33       35       33       31       47       15       17       23       69       45
  3        34       48       34       35       33       30       47       15       18       23       67       45
  4        33       43       34       35       33       30       46       15       18       23       66       58
  5        33       41       34       35       33       31       46       15       18       23       59       72
  6        33       41       35       35       33       31       45       15       18       23       55       75
  7        33       41       35       35       33       31       45       15       19       23       64       73
  8        42       41       36       35       33       30       44       15       19       23       88       68
  9        46       41       39       35       33       30       44       15       19       26       95       67
 10        47       41       38       35       33       30       43       15       19       36       93       67
 
 11        46       41       37       35       33       29       43       15       20       43       85       66
 12        39       41       37       35       32       29       42       15       20       43       83       66
 13        39       41       36       34       32       29       42       15       20       47       85       66
 14        41       41       35       34       33       29       36       15       21       48       83       66
 15        41       41       36       34       33       29       32       15       23       44       80       53
 16        41       41       36       34       33       29       31       15       22       38       80       34
 17        40       41       35       34       33       29       30       15       19       38       76       34
 18        38       41       35       34       33       29       30       15       18       38       71       33
 19        31       41       35       34       32       28       29       15       18       39       65       33
 20        15       41       35       34       32       36       28       15       18       39       59       33
 
 21        23       41       35       34       32       42       28       15       19       44       56       33
 22       103       41       35       34       32       42       28       15       20       54       55       33
 23        61       40       35       34       32       42       28       15       23       72       55       33
 24        40       40       35       33       32       42       28       15       23       97       37       33
 25        40       40       35       33       32       41       25       16       24      114       27       33
 26        40       40       35       33       32       43       22       16       21      117       40       33
 27        40       40       35       33       31       48       18       16       21      109       45       33
 28        49       40       35       33       31       48       15       16       21       93       45       33
 29        70       40       35       33      ---       47       15       16       22       85       45       33
 30        47       40       35       33      ---       47       15       16       22       82       45       33
 31        35      ---       34       33      ---       48      ---       16      ---       73       45      ---
 
TOTAL    1289     1232     1095     1057      910     1091     1019      472      596     1602     1987     1429
MEAN     41.6     41.1     35.3     34.1     32.5     35.2     34.0     15.2     19.9     51.7     64.1     47.6
MAX       103       48       39       35       33       48       47       16       24      117       95       75
MIN        15       40       33       33       31       28       15       15       16       22       27       33
AC-FT    2560     2440     2170     2100     1800     2160     2020      936     1180     3180     3940     2830
 


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1998, BY WATER YEAR (WY)                                 
 
MEAN     25.1     20.5     21.8     24.8     32.4     31.7     26.3     22.1     18.6     37.1     45.4     34.7
MAX      41.6     41.1     35.3     35.8     54.2     61.6     57.4     36.7     28.8     61.4     87.7     47.6
(WY)     1998     1998     1998     1993     1993     1997     1996     1996     1996     1995     1995     1998
MIN      10.8     10.6     9.98     7.59     7.45     7.75     7.74     10.6     7.70     9.45     20.5     26.4
(WY)     1991     1991     1991     1991     1991     1991     1992     1994     1991     1991     1991     1991
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1991 - 1998
 
ANNUAL TOTAL                       13633                      13779                                             
ANNUAL MEAN                           37.4                       37.8                       28.4                
HIGHEST ANNUAL MEAN                                                                         38.7            1995
LOWEST ANNUAL MEAN                                                                          12.4            1991
  HIGHEST DAILY MEAN                   103     Oct 22             117     Jul 26             139       Jul 31 1995
  LOWEST DAILY MEAN                     14     Apr 11              15     Oct 20               6.7     Apr  4 1994
  ANNUAL SEVEN-DAY MINIMUM              14     Apr 11              15     Apr 28               6.9     Apr  9 1991
  INSTANTANEOUS PEAK FLOW                                         117     Jul 25             142       Jul 31 1995
  INSTANTANEOUS PEAK STAGE                                          1.27  Jul 25               1.44    Jul 31 1995
ANNUAL RUNOFF (AC-FT)              27040                      27330                      20560                  
10 PERCENT EXCEEDS                    64                         65                         55                  
50 PERCENT EXCEEDS                    35                         34                         23                  
90 PERCENT EXCEEDS                    16                         17                          9.0