1996 California Hydrologic Data Report

10271200 BISHOP CREEK ABOVE POWERPLANT NO. 6, NEAR BISHOP, CA - 1996 WY

                         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 1995 TO SEPTEMBER 1996
                                               DAILY MEAN VALUES

DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

  1       2.0      2.0     1.7       2.3      1.7     1.2      1.5      20         32       24    104        4.8
  2       2.0      2.0     1.7       2.1      1.6     1.2      9.9      15         43       31     95        5.3
  3       2.1      2.0     1.7       2.0      1.5     1.2     33         9.0       59       48     88        3.4
  4       1.9      2.0     1.7       2.0      1.5     1.1     33        12         76       52     75        3.5
  5       1.8      2.0     1.7       2.0      1.7     1.9     31         7.8       94       49     64        3.7

  6       2.1      2.0     1.7       2.0      1.5     1.1     29        13        103       58     50        5.0
  7       2.5      2.0     1.7       2.0      1.5     1.1     30        12        120       59     29        2.5
  8       2.0      2.0     1.7       2.0      1.5     1.1     32        17        117       57     16        2.6
  9       2.1      2.0     1.7       2.0      1.5     1.1     34        18        115       94      8.6      1.6
 10       1.8      2.0     1.7       2.0      1.5      .98    33        18        118      118      7.3      1.7

 11       2.0      2.0     1.5       2.0      1.5      .93    30        27        105      133      5.1      2.1
 12       2.0      2.0     8.8       2.0      1.5      .84    32        39         90      149      6.5      1.6
 13       2.0      2.0     1.1       2.0      1.5      .89    28        46         98      144     21        3.0
 14       2.0      2.0      .89      1.8      1.5     1.2     25        51        101      119     28        3.1
 15       2.0      2.0     1.3       1.7      1.5      .94    19        49        104      119     31        1.6

 16       2.0      2.0     2.6       1.7      1.5      .87     6.9      73        101      146     36        1.5
 17       2.0      2.0     4.3       1.6      1.4      .77     3.4      47         94      144     36        1.6
 18       2.0      2.0    57         1.8      1.3     1.4      2.8      44         82      123     28        2.2
 19       2.0      2.0    43         1.7      1.4      .8      1.1      38         68      105     16        2.8
 20       2.0      1.7     2.7       1.7      1.7     1.1       .58     34         67       94      9.6      1.5

 21       1.9      1.7     2.5       1.9      1.4     1.5       .61     39         66       83      9.2      1.4
 22       1.7      1.7     2.3       1.8      1.2     2.4       .56     41         61       73      5.0      1.9
 23       1.7      1.7     2.3       2.0      1.1     2.1       .57     33         59       74      4.8      1.8
 24       1.7      1.7     2.3       1.9      1.1     2.3      4.0      34         56       85      4.4      1.6
 25       1.9      1.7     2.3       1.7      1.1     2.0      4.0      35         53       91      4.8      1.2

 26       2.0      1.7     2.3       1.7      1.2     2.1     12        29         48       96      6.2      1.4
 27       2.0      1.7     2.3       1.8      1.1     1.8      9.5      29         37      100     10        1.3
 28       2.0      1.7     2.3       2.0      1.3     1.5      9.4      26         26      135     11        1.6
 29       2.0      1.7     2.3       2.0      1.1     1.5      8.2      21         23      159      8.5      1.3
 30       2.0      1.7     2.3       1.8      ---     1.7     14        23         21      140      5.7      1.2
 31       2.0      ---     2.3       1.7      ---     1.5       ---     26        ---      121      5.2      ---

TOTAL    61.2     56.7   165.69     58.7     40.9    42.12   478.02    925.8     2237     3023    828.9     69.8
MEAN     1.97     1.89     5.34     1.89     1.41     1.36     15.9     29.9     74.6     97.5     26.7     2.33
MAX       2.5      2.0       57      2.3      1.7      2.4       34       73      120      159      104      5.3
MIN       1.7      1.7      .89      1.6      1.1      .77      .56      7.8       21       24      4.4      1.2
AC-FT     121      112      329      116       81       84      948     1840     4440     6000     1640      138
 a       4510     3900     3890     6040     6930     8310     8500     9060     8710     9320     9200     7860

  a Diversion, in acre-feet to Bishop Creek Powerplant No. 6, provided by Southern California Edison Co.


10271200 BISHOP CREEK ABOVE POWERPLANT NO. 6, NEAR BISHOP, CA--Continued STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1996, BY WATER YEAR (WY) OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP MEAN 1.00 3.17 1.67 2.12 1.33 2.75 3.40 8.81 27.0 66.9 39.3 4.17 MAX 1.97 14.9 5.34 8.50 2.35 7.54 15.9 29.9 74.6 240 171 17.8 (WY) 1996 1994 1996 1995 1992 1994 1996 1996 1996 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 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1991 - 1996 ANNUAL TOTAL 15889.96 7987.83 ANNUAL MEAN 43.5 21.8 13.6 HIGHEST ANNUAL MEAN 43.2 1995 LOWEST ANNUAL MEAN .34 1992 HIGHEST DAILY MEAN 407 Jul 31 159 Jul 29 407 Jul 31 1995 LOWEST DAILY MEAN .71 May 6 .56 Apr 22 .00 Jul 27 1992 ANNUAL SEVEN-DAY MINIMUM .92 May 4 .92 Mar 11 .00 Jul 27 1992 INSTANTANEOUS PEAK FLOW 197 Jul 29 421 Jul 31 1995 INSTANTANEOUS PEAK STAGE 2.40 Jul 29 3.71 Jul 31 1995 ANNUAL RUNOFF (AC-FT) 31520 15840 9850 ANNUAL DIVERSION (AC-FT) a 81410 86230 10 PERCENT EXCEEDS 174 84 38 50 PERCENT EXCEEDS 2.3 2.1 1.5 90 PERCENT EXCEEDS 1.5 1.3 .12 a Diversion, in acre-feet to Bishop Creek Powerplant No. 6, provided by Southern California Edison Co.


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