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 Unpublished records prior to October 1990 available in files of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 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 25 22 31 31 21 21 13 20 22 67 39 36
2 25 42 31 31 21 21 13 18 22 74 38 36
3 26 89 31 31 21 21 13 22 26 75 38 36
4 26 72 31 31 21 21 13 26 29 76 42 36
5 26 51 31 31 21 22 13 26 37 77 43 36
6 26 34 31 31 20 22 13 26 34 76 43 36
7 27 34 31 31 20 22 13 24 32 77 43 36
8 30 34 31 30 20 22 13 23 34 80 43 35
9 30 34 31 30 20 22 13 22 34 84 38 35
10 30 34 31 30 20 22 13 22 37 85 33 35
11 30 34 31 30 20 22 13 21 36 86 32 35
12 30 34 31 29 20 22 13 20 34 84 34 35
13 30 34 30 22 20 22 13 19 26 79 39 35
14 30 34 30 22 20 21 13 20 25 83 39 35
15 30 33 30 21 20 21 13 20 23 93 37 35
16 30 33 30 21 20 21 13 20 23 93 36 35
17 31 33 30 21 20 21 13 20 22 82 34 35
18 31 33 30 21 21 21 13 20 21 74 32 35
19 31 33 29 21 22 21 13 21 22 72 36 35
20 31 33 29 21 22 21 13 21 23 71 39 35
21 30 32 29 21 22 22 13 22 24 66 39 34
22 23 32 29 22 22 23 13 22 25 62 39 34
23 16 31 29 22 22 23 13 20 27 57 39 32
24 16 31 29 22 21 21 13 22 31 55 39 30
25 15 32 29 22 21 17 13 20 35 54 37 30
26 16 31 29 22 22 16 13 20 36 48 36 30
27 14 31 29 22 22 14 14 21 37 36 36 30
28 18 31 32 22 21 14 17 19 44 36 36 30
29 22 31 32 22 --- 14 22 16 55 39 36 30
30 22 31 32 21 --- 14 18 16 63 39 36 30
31 22 --- 31 21 --- 13 --- 21 --- 39 36 ---
TOTAL 789 1093 940 775 583 620 409 650 939 2119 1167 1017
MEAN 25.5 36.4 30.3 25.0 20.8 20.0 13.6 21.0 31.3 68.4 37.6 33.9
MAX 31 89 32 31 22 23 22 26 63 93 43 36
MIN 14 22 29 21 20 13 13 16 21 36 32 30
AC-FT 1560 2170 1860 1540 1160 1230 811 1290 1860 4200 2310 2020
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 1999, BY WATER YEAR (WY)
MEAN 21.0 19.0 18.3 23.4 29.3 24.8 23.2 24.4 40.3 81.6 55.6 35.2
MAX 40.9 36.4 30.3 35.2 46.1 41.6 41.1 43.4 91.1 147 107 49.4
(WY) 1998 1999 1999 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 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1991 - 1999
ANNUAL TOTAL 15640 11101
ANNUAL MEAN 42.8 30.4 33.1
HIGHEST ANNUAL MEAN 47.8 1995
LOWEST ANNUAL MEAN 18.4 1991
HIGHEST DAILY MEAN 244 Jul 21 93 Jul 15 244 Jul 21
1998
LOWEST DAILY MEAN 14 Oct 27 13 Mar 31 6.5 Mar 19
1991
ANNUAL SEVEN-DAY MINIMUM 17 Oct 23 13 Mar 31 6.5 Mar 19
1991
INSTANTANEOUS PEAK FLOW 96 Jul 15 270 Jul 10
1995
INSTANTANEOUS PEAK STAGE 1.08 Jul 15 2.15 Jul 10
1995
ANNUAL RUNOFF (AC-FT) 31020 22020 23980
10 PERCENT EXCEEDS 112 42 65
50 PERCENT EXCEEDS 30 30 24
90 PERCENT EXCEEDS 20 16 10
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