11238600 SAN JOAQUIN RIVER ABOVE STEVENSON CREEK, NEAR BIG CREEK, CA
LOCATION.-Lat 37°12'28", long 119°19'44", unsurveyed, T.8 S., R.24 E., Fresno County, Hydrologic Unit 18040006, Sierra National Forest, in intake
structure near left bank, 300 ft upstream from Dam 6, 3.5 mi upstream from Stevenson Creek, 4.4 mi west of town of Big Creek, and at mile 313.6.
DRAINAGE AREA.-1,197 mi2.
PERIOD OF RECORD.-Water years 1987, 1993-94, October 1995 to current year. Records for water years 1951 to 1972 in files of Southern California Edison Co.
Records for water years 1974 to 1986 in files of the U.S. Geological Survey.
GAGE.-Accoustic-velocity meter and water-stage recorder on Dam 6 since Oct. 1, 1992. Water-stage recorders at various sites downstream prior to 1992. Elevation
of gage is 2,200 ft above sea level, from topographic map.
REMARKS.-Record consists of computed flow over spillway at Dam 6 and flow through fish-water release valve. At times the sluice valve leaks and this flow
bypasses the station. Flow regulated by Mammoth Pool Reservoir and Huntington Lake (stations 11234700 and 11236000) and diversions for power development in Big
Creek powerplants. Most of the water is diverted past this station to Big Creek Powerplant No. 3 (station 11241800). See schematic diagram of lower San Joaquin
River Basin.
COOPERATION.-Records collected by the 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, 72,500 ft3/s, Jan. 2, 1997; minimum daily, 3.0 ft3/s, at times in several years.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 e3.3 3.4 e3.3 3.4 3.4 3.4 295 277 3490 7900 616 3.4
2 e3.3 3.4 e3.3 3.4 3.4 3.4 258 1080 4680 7240 753 3.4
3 e3.3 e3.3 e3.3 3.4 3.3 3.4 369 1130 5070 6400 1280 3.4
4 e3.3 e3.3 e3.3 3.4 3.4 3.4 412 1270 4000 5590 1820 3.4
5 e3.3 e3.3 e3.3 3.4 3.4 3.4 15 1200 3910 4940 1040 3.9
6 e3.3 e3.3 e3.3 3.4 3.4 3.4 3.3 1160 e5460 4840 813 3.4
7 e3.3 e3.3 e3.3 3.4 3.4 3.4 3.4 983 e6970 4730 373 3.4
8 e3.4 e3.3 e3.3 3.4 3.4 3.4 3.4 1470 e6470 5170 50 3.4
9 3.4 e3.3 e3.3 3.4 3.4 3.3 3.3 448 e6290 5990 342 3.4
10 3.4 e3.3 e3.3 3.4 3.3 3.4 3.4 320 6450 5440 640 3.4
11 3.4 e3.3 e3.3 3.4 3.4 3.4 3.4 141 6260 3690 277 8.7
12 3.4 e3.3 e3.3 3.4 3.4 3.4 3.4 291 5580 3510 3.3 3.4
13 3.4 e3.3 e3.3 3.4 3.4 3.4 3.4 103 5160 3350 140 4.6
14 3.4 e3.3 e3.3 3.4 3.4 3.4 3.3 58 6840 3180 285 3.4
15 3.4 e3.3 e3.3 3.4 3.4 3.4 3.3 85 8820 2800 237 e3.4
16 3.4 e3.3 e3.3 3.4 3.4 3.4 3.4 60 10100 2510 133 3.4
17 3.4 e3.3 e3.3 3.4 3.4 3.4 3.4 3.2 8920 1990 3.3 3.4
18 3.4 e3.3 3.4 3.4 3.4 3.3 3.4 106 8190 2350 3.4 3.4
19 3.4 e3.3 3.4 3.4 3.4 3.3 49 44 9120 3340 3.4 3.4
20 3.4 e3.3 3.4 3.4 3.4 3.4 243 160 9500 4190 3.4 3.4
21 3.4 e3.3 3.4 3.4 142 3.4 56 18 9720 5450 9.9 3.4
22 3.4 e3.3 3.4 3.4 24 3.3 3.3 104 10400 4190 3.4 3.4
23 3.4 e3.3 3.4 3.4 3.4 69 82 24 10600 3040 3.3 3.4
24 3.4 e3.3 3.4 3.4 29 603 11 109 9830 1520 22 3.4
25 3.4 e3.3 3.4 3.4 10 1160 125 267 10000 738 19 3.4
26 3.4 e3.3 3.4 3.4 3.4 563 3.3 1010 9310 72 3.3 3.4
27 3.4 e3.3 3.4 3.4 3.4 452 57 1410 8810 1460 74 3.4
28 3.4 e3.3 3.4 3.4 3.4 454 121 1210 9090 1950 3.3 3.4
29 3.4 e3.3 3.4 11 --- 319 174 2190 9400 1910 23 3.4
30 3.4 e3.3 3.4 3.4 --- 107 64 1460 9970 1410 56 3.4
31 3.4 --- 3.4 3.4 --- 168 --- 2020 --- 1420 3.4 ---
TOTAL 104.7 99.2 103.7 113.0 286.4 3969.4 2381.4 20211.2 228410 112310 9036.4 109.0
MEAN 3.38 3.31 3.35 3.65 10.2 128 79.4 652 7614 3623 291 3.63
MAX 3.4 3.4 3.4 11 142 1160 412 2190 10600 7900 1820 8.7
MIN 3.3 3.3 3.3 3.4 3.3 3.3 3.3 3.2 3490 72 3.3 3.4
AC-FT 208 197 206 224 568 7870 4720 40090 453100 222800 17920 216
a 85560 58590 61580 84180 131700 169900 172600 194000 174000 170600 153400 152200
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1987 - 1998, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 3.40 3.40 36.2 1104 485 359 269 1667 2672 882 52.4 3.50
MAX 3.90 3.95 200 6605 1841 954 621 3726 7614 3623 291 4.04
(WY) 1987 1987 1997 1997 1997 1996 1996 1993 1998 1998 1998 1987
MIN 3.14 3.20 3.25 3.26 3.30 3.20 3.25 3.39 3.60 3.29 3.30 3.29
(WY) 1993 1993 1993 1993 1993 1994 1994 1994 1994 1997 1997 1993
SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1987 - 1998
ANNUAL TOTAL 432612.7 377134.4
ANNUAL MEAN 1185 1033 628
HIGHEST ANNUAL MEAN 1202 1997
LOWEST ANNUAL MEAN 3.38 1994
HIGHEST DAILY MEAN 32000 Jan 3 10600 Jun 23 32000 Jan 3 1997
LOWEST DAILY MEAN 3.1 Mar 24 3.2 May 17 3.0 Dec 4 1993
ANNUAL SEVEN-DAY MINIMUM 3.3 Jul 14 3.3 Oct 1 3.1 Oct 6 1992
INSTANTANEOUS PEAK FLOW 14200 Jun 23 72500 Jan 2 1997
ANNUAL RUNOFF (AC-FT) 858100 748000 454900
TOTAL DIVERSION (AC-FT) a 1356000 1608000 1139000
10 PERCENT EXCEEDS 3880 4770 2280
50 PERCENT EXCEEDS 3.4 3.4 3.4
90 PERCENT EXCEEDS 3.3 3.3 3.2
a Diversion, in acre-feet, to Big Creek Powerplant No. 3, provided by Southern California Edison Co.
USGS Water Resources of California
Contact:
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Last modified: Wed Aug 4 09:40:29 PDT 1999