10270872 MIDDLE FORK BISHOP CREEK BELOW LAKE SABRINA, NEAR BISHOP, CA

LOCATION.-Lat 37°12'50", long 118°36'34", unsurveyed, T.8 S., R.31 E., Inyo County, Hydrologic Unit 18090102, Inyo National Forest, on right bank 800 ft downstream from Lake Sabrina Dam and 15.6 mi southwest of Bishop. 
DRAINAGE AREA.-16.7 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 Unpublished records prior to October 1990 available in files of Southern California Edison Co. 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 9,050 ft above sea level, from topographic map. 
REMARKS.-Flow regulated by Lake Sabrina (station 10270870). 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, 270 ft3/s, July 10, 1995, gage height, 2.15 ft; minimum daily, 6.5 ft3/s,    Mar. 19-27, 1991. 

                  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        29       47       23       19       21       21       30       20       22      119      121       48
  2        29       42       19       19       21       21       30       20       22      121      116       49
  3        29       29       19       19       21       20       28       20       22      118      101       57
  4        29       23       19       18       21       20       31       20       22      117       96       69
  5        29       21       19       19       21       20       32       21       22      118       97       77
  6        28       20       18       19       21       20       32       21       22      119      102       81
  7        28       20       18       18       21       20       31       21       23      120      112       82
  8        30       22       18       18       21       20       31       21       23      118      113       80
  9        31       22       18       18       21       20       31       21       23      118      111       81
 10        31       22       18       18       21       20       30       21       29      120      113       79
 
 11        31       22       18       18       21       20       30       21       33      121      113       79
 12        31       22       18       18       21       20       30       21       33      122      105       78
 13        31       24       18       18       21       20       30       21       34      123      106       43
 14        31       22       17       18       21       20       30       21       34      124      104       43
 15        31       22       17       18       21       20       30       21       34      125      101       43
 16        33       22       17       18       21       20       30       21       35      126      100       43
 17        35       22       17       19       21       20       21       21       36      127       91       43
 18        35       22       17       22       21       20       21       21       36      127       78       41
 19        30       22       17       22       21       20       21       21       37      149       69       36
 20        16       22       17       22       21       20       21       21       37      191       64       31
 
 21        36       22       17       22       20       20       21       21       37      244       55       29
 22        91       22       17       22       21       19       21       21       38      233       50       29
 23        52       22       17       21       21       19       20       21       38      225       50       28
 24        33       23       17       21       21       19       20       21       37      222       45       26
 25        33       26       17       21       21       19       20       21       38      203       44       26
 26        39       26       17       21       21       22       20       21       45      172       45       25
 27        62       29       17       21       21       26       20       21       49      152       42       25
 28        78       27       17       21       21       26       20       21       51      143       42       25
 29       112       27       18       21      ---       26       20       21       61      139       42       25
 30        84       27       19       21      ---       30       20       21       93      133       45       25
 31        52      ---       19       21      ---       30      ---       21      ---      124       45      ---
 
TOTAL    1269      741      554      611      587      658      772      647     1066     4513     2518     1446
MEAN     40.9     24.7     17.9     19.7     21.0     21.2     25.7     20.9     35.5      146     81.2     48.2
MAX       112       47       23       22       21       30       32       21       93      244      121       82
MIN        16       20       17       18       20       19       20       20       22      117       42       25
AC-FT    2520     1470     1100     1210     1160     1310     1530     1280     2110     8950     4990     2870
 


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1998, BY WATER YEAR (WY)                                 
 
MEAN     20.5     16.9     16.8     23.2     30.4     25.4     24.4     24.9     41.4     83.3     57.9     35.4
MAX      40.9     24.7     24.8     35.2     46.1     41.6     41.1     43.4     91.1      147      107     49.4
(WY)     1998     1998     1994     1994     1997     1995     1996     1996     1997     1995     1995     1995
MIN      11.8     8.56     10.2     7.63     7.11     6.91     10.4     9.28     9.14     30.6     33.8     22.7
(WY)     1991     1993     1993     1991     1991     1991     1993     1994     1994     1994     1992     1994
 
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1991 - 1998
 
ANNUAL TOTAL                       14756                      15382                                             
ANNUAL MEAN                           40.4                       42.1                       33.4                
HIGHEST ANNUAL MEAN                                                                         47.8            1995
LOWEST ANNUAL MEAN                                                                          18.4            1991
  HIGHEST DAILY MEAN                   140     Jun 21             244     Jul 21             244       Jul 21 1998
  LOWEST DAILY MEAN                     14     Apr  6              16     Oct 20               6.5     Mar 19 1991
  ANNUAL SEVEN-DAY MINIMUM              14     Apr  6              17     Dec 14               6.5     Mar 19 1991
  INSTANTANEOUS PEAK FLOW                                         249     Jul 21             270       Jul 10 1995
  INSTANTANEOUS PEAK STAGE                                          2.04  Jul 21               2.15    Jul 10 1995
ANNUAL RUNOFF (AC-FT)              29270                      30510                      24220                  
10 PERCENT EXCEEDS                    81                        112                         66                  
50 PERCENT EXCEEDS                    32                         22                         23                  
90 PERCENT EXCEEDS                    17                         19                          9.8