11371600 SPRING CREEK POWERPLANT AT KESWICK, CA
LOCATION.-Lat 40°37'41", long 122°27'59", in NE 1/4 SE 1/4 sec.18, T.32 N., R.5 W., Shasta County, Hydrologic Unit 18020112, at powerplant on Spring
Creek, 0.4 mi northwest of Keswick, and 4.9 mi northwest of Redding.
PERIOD OF RECORD.-December 1963 to current year.
GAGE.-Discharge computed from powerplant output.
REMARKS.-Water is released from Whiskeytown Lake (station 11371700) through a tunnel to powerplant and then into Keswick Reservoir. Spring Creek Reservoir
releases into Keswick Reservoir at Spring Creek Powerplant. See schematic diagrams of upper Sacramento River and Pit and McCloud River Basins.
COOPERATION.-Records were provided by U.S. Bureau of Reclamation, not rounded to U.S. Geological Survey standards.
EXTREMES FOR PERIOD OF RECORD.-Maximum daily discharge, 4,800 ft3/s, May 2, 1983; no flow for many days most 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
1 268 1420 638 263 2345 4102 2868 3841 1814 2430 3254 2716
2 271 1388 267 264 4095 4266 1495 3573 771 2503 3258 2868
3 262 1421 272 381 3702 4102 961 4204 762 2640 3226 2570
4 269 1424 364 974 4109 1413 1314 4166 362 3237 3273 2161
5 297 1027 271 608 3830 1257 3789 4213 1137 3507 3252 1995
6 358 1013 250 754 3998 284 3236 4189 1605 3260 3035 1963
7 253 1069 508 605 3950 279 3030 3902 273 3178 3428 1910
8 258 835 256 710 3965 1165 3240 4045 902 3253 3282 2370
9 267 788 315 747 3946 2153 2914 4170 500 3683 2942 1970
10 405 746 499 425 4000 950 2428 4073 932 3573 3040 1668
11 509 808 262 1019 4004 273 4041 4046 912 3572 3036 1669
12 510 767 271 1215 4017 940 4047 2979 675 3575 3041 1685
13 511 268 259 1225 4016 1128 3744 2270 756 3573 3091 1644
14 906 269 427 1764 4022 2838 4135 1927 551 3585 3034 1930
15 1389 274 255 3549 4018 2569 4094 2001 489 3179 3043 1929
16 1091 262 270 2166 4024 2366 4032 2859 789 3005 3066 1968
17 978 271 262 1420 3972 2520 3736 2404 568 2865 3025 1855
18 991 263 158 3210 3950 3411 3022 2844 484 2866 3094 1816
19 997 112 264 3550 4148 3475 2418 935 668 3666 3100 1587
20 994 1624 268 4035 3964 2928 4014 1312 256 3449 3135 1474
21 1521 480 889 3156 4148 3667 3929 664 725 3116 3110 1493
22 1487 477 262 1667 4148 4097 3447 1562 522 3141 3097 1475
23 1341 473 261 1037 3928 4101 3916 576 1026 2480 3789 1176
24 1037 259 248 1268 3942 3913 4070 585 1544 3314 3493 999
25 1014 553 268 1268 4149 3986 4072 1464 1535 3142 2900 1223
26 1031 1539 531 1354 4064 4052 4067 1339 1941 3309 2817 1210
27 999 1412 265 3158 4102 4056 4060 357 1540 3431 2717 1290
28 953 653 457 2655 4126 4077 3914 368 1620 3180 2726 1672
29 1150 279 264 1909 --- 3654 4041 2227 1978 3061 2585 1262
30 1363 262 264 2080 --- 3662 3808 4162 2025 3135 2428 1385
31 1434 --- 260 1730 --- 1060 --- 2178 --- 2867 2718 ---
TOTAL 25114 22436 10305 50166 110682 82744 101882 79435 29662 98775 95035 52933
MEAN 810 748 332 1618 3953 2669 3396 2562 989 3186 3066 1764
MAX 1521 1624 889 4035 4149 4266 4135 4213 2025 3683 3789 2868
MIN 253 112 158 263 2345 273 961 357 256 2430 2428 999
AC-FT 49810 44500 20440 99500 219500 164100 202100 157600 58830 195900 188500 105000
a 1410 649 2640 6340 20730 5400 2740 2530 2000 1200 377 282
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1964 - 1998, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 1619 1259 1107 1365 1636 1634 1403 1572 1996 2438 2332 2227
MAX 3691 3175 4033 4533 4499 4364 4405 4265 3866 3886 3654 3526
(WY) 1989 1967 1974 1974 1974 1983 1983 1983 1969 1968 1977 1988
MIN 265 .87 1.55 2.10 3.36 86.6 5.23 5.45 158 250 467 416
(WY) 1978 1992 1992 1991 1991 1988 1987 1991 1989 1978 1992 1992
SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1964 - 1998
ANNUAL TOTAL 492816 759169
ANNUAL MEAN 1350 2080 1716
HIGHEST ANNUAL MEAN 3390 1974
LOWEST ANNUAL MEAN 748 1992
HIGHEST DAILY MEAN 3960 Jan 4 4266 Mar 2 4800 May 2 1983
LOWEST DAILY MEAN 0 Apr 12 112 Nov 19 0 Mar 30 1974
ANNUAL SEVEN-DAY MINIMUM 44 Apr 9 246 Nov 13 .00 Mar 26 1976
ANNUAL RUNOFF (AC-FT) 977500 1506000 1243000
10 PERCENT EXCEEDS 2940 4030 3510
50 PERCENT EXCEEDS 1080 1910 1580
90 PERCENT EXCEEDS 259 271 22
a Discharge, in acre-feet, from Spring Creek Reservoir, provided by U.S. Bureau of Reclamation. USGS Water Resources of California