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, 453 ft3/s, July 23, 1998, gage height, 3.77 ft; no
flow on many days in July and August 1992.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 1.3 74 1.5 .89 .97 3.0 1.7 .84 1.7 33 1.2 .90
2 .66 101 1.5 .88 1.1 2.9 1.5 .74 1.7 44 1.4 .93
3 .61 157 1.3 .89 1.1 2.7 1.4 .74 2.4 38 1.5 .89
4 .61 168 1.4 .89 1.1 2.6 1.5 .74 2.2 38 1.2 .89
5 .52 125 1.5 .89 1.1 55 1.5 .74 1.7 41 1.2 .89
6 .61 17 1.5 .89 1.1 27 1.5 1.3 1.6 39 1.1 .89
7 .61 6.3 e1.5 .89 1.1 1.7 1.5 .70 1.6 40 1.1 .89
8 .61 6.2 1.5 .89 .99 1.7 1.5 .61 1.7 40 1.1 .89
9 .61 6.2 1.5 .89 .95 1.7 1.2 .58 2.0 42 1.1 .92
10 .51 6.3 e1.5 .89 .89 1.7 1.2 .58 2.0 43 1.0 1.0
11 .49 6.2 1.5 1.0 7.3 1.7 1.2 .61 2.0 46 1.1 .98
12 .49 4.8 1.5 1.1 25 1.7 1.2 .57 1.9 44 1.0 .97
13 .57 3.7 1.3 1.1 16 1.7 1.2 .53 8.5 40 1.1 .89
14 .39 3.4 1.1 1.1 1.2 1.7 1.2 .47 2.2 38 1.1 .93
15 .41 3.4 1.1 1.1 1.2 1.7 1.2 1.0 3.4 34 1.0 .89
16 .40 3.2 1.1 1.0 2.1 1.7 1.2 2.3 8.2 30 .99 .93
17 .44 3.0 1.1 .89 2.0 1.7 1.2 2.3 8.7 26 1.1 .89
18 .40 3.0 1.1 1.0 2.8 1.8 1.2 2.3 7.0 22 .98 1.1
19 .50 3.0 1.0 1.1 2.6 2.3 1.4 2.3 9.9 20 .98 .99
20 .39 2.3 e1.0 1.1 2.6 2.2 1.2 2.2 20 17 .95 .94
21 .38 2.2 e1.0 .92 2.9 2.3 .98 2.3 30 15 .98 .94
22 .46 2.0 e1.1 .89 2.9 2.3 .89 2.2 14 10 .97 1.0
23 .49 1.7 e1.1 .89 3.0 2.3 .89 2.3 11 5.2 .97 1.1
24 .47 1.7 e1.2 e.90 3.0 2.3 .89 2.3 23 6.7 .97 1.0
25 .47 1.5 1.2 e.90 3.7 2.3 .89 2.2 27 6.4 .98 .96
26 12 1.5 1.2 e.90 3.4 2.3 .89 2.3 25 1.3 1.0 .99
27 66 1.5 1.1 e.93 3.4 2.3 .89 3.8 18 .36 1.6 .96
28 66 1.5 1.1 e.90 3.4 2.3 .78 2.1 17 .31 .89 1.0
29 81 1.5 1.1 e.90 --- 2.3 .74 2.4 21 .29 .89 1.0
30 76 1.6 1.1 .91 --- 2.1 .86 2.2 33 .38 3.1 .99
31 78 --- .97 .89 --- 1.8 --- 1.7 --- 1.2 1.0 ---
TOTAL 392.40 719.7 38.67 29.31 98.90 142.8 35.40 47.95 309.4 762.14 35.55 28.54
MEAN 12.7 24.0 1.25 .95 3.53 4.61 1.18 1.55 10.3 24.6 1.15 .95
MAX 81 168 1.5 1.1 25 55 1.7 3.8 33 46 3.1 1.1
MIN .38 1.5 .97 .88 .89 1.7 .74 .47 1.6 .29 .89 .89
AC-FT 778 1430 77 58 196 283 70 95 614 1510 71 57
a 4990 5900 6200 5150 3940 4740 4770 6690 7500 7770 6720 5710
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1999, BY WATER YEAR (WY)
MEAN 6.87 5.46 1.56 5.95 2.59 2.67 2.72 7.89 32.7 83.3 40.4 7.37
MAX 37.4 24.0 5.34 38.6 10.9 7.54 15.9 29.9 86.7 240 171 37.5
(WY) 1998 1999 1996 1997 1998 1994 1996 1996 1997 1995 1995 1998
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 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1991 - 1999
ANNUAL TOTAL 14094.16 2640.76
ANNUAL MEAN 38.6 7.23 16.8
HIGHEST ANNUAL MEAN 43.2 1995
LOWEST ANNUAL MEAN .34 1992
HIGHEST DAILY MEAN 420 Jul 24 168 Nov 4 420 Jul 24
1998
LOWEST DAILY MEAN .25 Sep 26 .29 Jul 29 .00 Jul 27
1992
ANNUAL SEVEN-DAY MINIMUM .29 Sep 21 .42 Oct 15 .00 Jul 27
1992
INSTANTANEOUS PEAK FLOW 189 Nov 4 453 Jul 23
1998
INSTANTANEOUS PEAK STAGE 2.35 Nov 4 3.77 Jul 23
1998
ANNUAL RUNOFF (AC-FT) 27960 5240 12150
ANNUAL DIVERSION (AC-FT) a 79850 70090
10 PERCENT EXCEEDS 158 21 55
50 PERCENT EXCEEDS 1.6 1.3 1.5
90 PERCENT EXCEEDS .41 .72 .17
a Diversion, in acre-feet, to Bishop Creek Powerplant No. 6, provided by Southern California Edison Co.
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