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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