10271200 BISHOP CREEK ABOVE POWERPLANT NO. 6, NEAR BISHOP, CA

LOCATION.-Lat 37°21'00", long 118°27'42", in SE 1/4 SE 1/4 sec.9, T.7 S., R.32 E., Inyo County, Hydrologic Unit 18090102, on left bank 
  adjacent to Powerplant No. 6 tailrace and 3.8 mi west of Bishop. 
DRAINAGE AREA.-104 mi2. 
PERIOD OF RECORD.-October 1990 to current year. If records for Bishop Creek Powerplant No. 6 Conduit (station 10271060) are combined 
  with this record, a record equivalent to that published since October 1936 as Bishop Creek below Powerplant No. 6, near Bishop, discontinued 
  September 1990, can be obtained. Monthly and yearly mean discharge prior to October 1969, published in WSP 2127. 
GAGE.-Water-stage recorder and Parshall flume. Elevation of gage is 4,510 ft above sea level, from topographic map. 
REMARKS.-Flow regulated for power development by South Lake, Lake Sabrina, and Intake No. 2 Reservoir (stations 10270700, 10270870, and 
  10270875), combined capacity, 20,311 acre-ft, and five powerplants. Water is diverted into basin via Birch-McGee Diversion (station 
  10270900). Water is diverted out of basin via Abelour Ditch (station 10270985) for irrigation and domestic use. Diversion to Bishop Creek 
  Powerplant No. 6 (station 10271060) bypasses this station and is published as a line item below. 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, 421 ft3/s, July 31, 1995, gage height, 3.71 ft; no flow on many days in July and 
  August 1992. 

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997

                                               DAILY MEAN VALUES
 
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
  1      2.1       .61      1.7     1.5      1.7      2.1       .51     1.5        54       69    72         .68
  2      1.5       .50      1.7    36        1.5      1.7      1.0      1.4        49       53    59        1.9 
  3      1.7      1.2       1.7    85        1.3      1.7      2.6      1.2        56       33    54         .78
  4      4.0      2.7       1.7     1.0      1.1      1.9      2.7      1.2        63       26    46         .64
  5      1.2      1.9       1.8      .55     1.1      1.7      2.6      1.2        65       30    41         .60
 
  6      1.2      1.7       2.0    61        1.1      1.7      2.9      1.1        67       41    48         .60
  7      1.1      1.7       2.0   105        1.0      3.3      2.9      1.1        59       49    59         .55
  8      1.1      1.7       2.0   110         .89     1.7      2.6      1.1        62       66    64         .63
  9      1.1      1.7       2.0   111         .89     1.7      2.4      1.0        70      107    55        1.6 
 10      1.1      1.7       2.0   111         .89     1.7      2.3       .89       68      125    48         .71
 
 11      1.1      1.7       1.8   112         .89     1.5      2.3       .84       66      133    48         .61
 12      1.1      1.7       1.7   114         .81     1.4      2.3       .75       65      136    38         .53
 13      1.1      1.7       1.7   113         .74     1.2      2.3      5.9        65      132    21         .54
 14      1.1      1.7       1.7   113         .74     2.7      2.3     24          74      126    15         .54
 15      1.1      1.7       1.5    86         .74     1.2      2.3     21          67      125     4.5     53   
 
 16      1.1      1.7       1.5      .90      .74     1.1      2.3     29          60      122     2.3      1.0 
 17       .89     3.1       1.5      .62      .69     1.2      2.3     27          63      111      .94      .83
 18       .86     2.0       1.5      .49      .61      .91     2.3     33          79      100      .95    10   
 19       .69     2.0       1.5     1.7       .61      .74     2.3     29         111      100      .52      .77
 20       .69     2.0       1.5     2.8       .61     2.4      2.3     21         133       98      .45      .60
 
 21      1.2      2.1       1.3     2.6       .74     1.1      2.3     16         138       89     1.0       .58
 22       .75     2.2       1.3     2.6       .66      .72     2.2     17         161       87     1.9       .57
 23       .66     2.0       1.1     2.7       .58      .56     2.0     18         134      107     1.3       .50
 24      1.6      2.0       1.1     2.6       .47      .49     2.0     19         117      138      .92      .47
 25       .85     2.0       1.1     3.0       .72     3.9      2.0     18         106      136      .89      .53
 
 26      1.4      1.7       1.1     2.7      2.2      4.3      2.2     23         114      121      .84      .61
 27      1.4      1.7       1.1     2.6      2.5      2.5      1.9     21         117      103      .74      .57
 28     57        1.7       1.1     2.8      1.8      1.8      1.7     19         121       97      .74      .48
 29     74        1.7       1.1     3.4       ---      .97     1.5     31         108       95      .71     1.5 
 30     14        1.7       1.1     1.7       ---      .58     1.6     38          90       90      .69     4.1 
 31       .62      ---      1.1     2.5       ---      .58      ---    58         ---       85      .69      ---
 
TOTAL  179.31    53.51     47.0  1195.76    28.32    51.05    64.91   481.18     2602     2930   688.08    87.02
MEAN     5.78     1.78     1.52     38.6     1.01     1.65     2.16     15.5     86.7     94.5     22.2     2.90
MAX        74      3.1      2.0      114      2.5      4.3      2.9       58      161      138       72       53
MIN       .62      .50      1.1      .49      .47      .49      .51      .75       49       26      .45      .47
AC-FT     356      106       93     2370       56      101      129      954     5160     5810     1360      173
 a       4500     4900     4950     5390     7970     8790     5720     8360     8510     8820     8320     6940


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1997, BY WATER YEAR (WY)                                 
 
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
MEAN     1.68     2.97     1.65     7.33     1.29     2.59     3.22     9.77     35.5     70.8     36.9     3.99
MAX      5.78     14.9     5.34     38.6     2.35     7.54     15.9     29.9     86.7      240      171     17.8
(WY)     1997     1994     1996     1997     1992     1994     1996     1996     1997     1995     1995     1995
MIN       .11      .19      .19      .17      .21      .19      .18      .12     .064     .035     .048     .082
(WY)     1993     1991     1993     1993     1993     1992     1992     1992     1992     1992     1992     1992
 

SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1991 - 1997
 
ANNUAL TOTAL                        7984.06                    8408.14                                          
ANNUAL MEAN                           21.8                       23.0                       14.9                
HIGHEST ANNUAL MEAN                                                                         43.2            1995
LOWEST ANNUAL MEAN                                                                            .34           1992
HIGHEST DAILY MEAN                   159     Jul 29             161     Jun 22             407       Jul 31 1995
LOWEST DAILY MEAN                       .50  Nov  2                .45  Aug 20                .00    Jul 27 1992
ANNUAL SEVEN-DAY MINIMUM                .82  Oct 17                .53  Sep 22                .00    Jul 27 1992
INSTANTANEOUS PEAK FLOW                                         250     Jan  3             421       Jul 31 1995
INSTANTANEOUS PEAK STAGE                                          2.73  Jan  3               3.71    Jul 31 1995
ANNUAL RUNOFF (AC-FT)              15840                      16680                      10830                  
ANNUAL DIVERSION (AC-FT) a         88280                      82720
10 PERCENT EXCEEDS                    84                         97                         49                  
50 PERCENT EXCEEDS                     2.0                        1.8                        1.5                
90 PERCENT EXCEEDS                     1.1                         .65                        .14               
 
    a  Diversion, in acre-feet, to Bishop Creek Powerplant No. 6, provided by Southern California Edison Co.