11365000 PIT RIVER NEAR MONTGOMERY CREEK, CA
LOCATION.--Lat 40°50'38", long 122°00'05", in NE 1/4 SW 1/4 sec.32, T.35 N., R.1 W., Shasta County, Hydrologic Unit 18020003, Shasta
National Forest, on left bank 0.7 mi downstream from Pit No. 7 Dam and Powerplant, 1.4 mi upstream from Potem Creek, and 4.1 mi west of
town of Montgomery Creek.
DRAINAGE AREA.--4,952 mi2, excluding Goose Lake basin.
PERIOD OF RECORD.--October 1944 to current year (monthly discharge only December 1964 to May 1965). Monthly discharge only for some
periods, published in WSP 1315-A.
CHEMICAL DATA: Water years 1951, 1953, 1955-81.
WATER TEMPERATURE: Water years 1951, 1954-57, 1959 .
REVISED RECORDS.--WSP 1931: Drainage area. WDR CA-86-4: 1983 (M).
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 1,000.00 ft above sea level (levels by Pacific Gas & Electric Co.). October
1944 to Feb. 17, 1963, at site 0.7 mi upstream at different datum. Feb. 17, 1963, to May 21, 1965, at site 1.5 mi upstream at different datum.
May 21, 1965, to June 20, 1981, at site 0.9 mi downstream at datum 1,036.00 ft above sea level.
REMARKS.--Low flow completely regulated by many reservoirs and powerplants, total usable reservoir capacity, 337,000 acre-ft. Many diversions
upstream from station for irrigation. Diversion from McCloud River to Iron Canyon Reservoir (station 11363920) began December 1965. See
schematic diagram of Pit and McCloud River basins.
COOPERATION.--Records were collected by Pacific Gas & Electric 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, 73,000 ft3/s, Jan. 24, 1970, gage height, 32.36 ft, site and datum then in use;
maximum gage height, 74.65 ft, Feb. 19, 1986; minimum daily, 30 ft3/s, July 12, 27, 1975, result of construction work below Pit No. 7
Powerplant.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 3980 13800 5900 e37600 13800 6260 6550 5430 3850 3590 4030 2930
2 3580 13600 5740 e39200 13600 6320 5370 5540 3770 3810 2930 3500
3 3690 13500 6400 e40200 13500 5900 5660 4790 3790 4880 967 5210
4 4480 13500 6630 e30800 13500 5740 5520 5740 3850 3110 3750 5990
5 2600 11700 5980 e24600 11700 6400 5840 5450 3640 1690 4400 5780
6 3550 11000 6570 e21200 11000 6630 5620 5750 4000 588 3200 1170
7 3210 10000 4420 e17400 10000 5980 5590 5550 3940 4240 3460 252
8 3280 9130 5390 e11000 9130 6570 5820 5100 3870 3620 3120 2200
9 2890 9010 5820 12900 9010 4420 5560 4190 3800 4090 2110 3800
10 3290 8660 5530 11000 8660 5390 6130 2740 3830 2990 1880 3600
11 3990 8510 5650 10300 8510 5820 4420 2120 3880 4240 3540 4510
12 3450 8420 5900 9790 8420 5530 4200 3650 4160 1340 4630 3660
13 1880 8390 6490 8390 8390 5650 4720 5020 4240 2960 3070 1070
14 2780 8360 5720 8380 8360 5900 4750 4160 4940 3800 3810 1110
15 3050 8340 6580 6490 8340 6490 5000 4030 1800 3830 4020 3990
16 3680 8310 7700 6200 8310 5720 5570 4180 2880 3850 2010 3920
17 3380 7340 7380 6700 7340 6580 4450 2570 4060 3580 2230 3610
18 3170 6290 6720 8070 6290 5310 5880 1560 4120 3880 3440 2820
19 3500 8310 5980 6600 8310 6190 2550 4100 4160 2070 3890 4360
20 2280 7800 6870 7900 7800 5800 4730 4550 4130 1880 3840 1670
21 2370 8330 6990 7710 8330 7150 5770 4490 4120 4240 3790 2130
22 3910 6640 e5700 8940 6640 6350 6080 3490 3450 3430 3900 3080
23 9500 6690 e6900 9500 6690 6030 7230 6190 2560 3830 2660 3710
24 8420 5670 e6000 8420 5670 5540 5470 6720 4130 3930 1790 3530
25 9100 7280 e5600 9100 7280 6310 7040 3570 3810 3740 3830 2600
26 13600 6420 e6100 13600 6420 6120 6070 4710 4020 1640 3960 3790
27 12800 6620 e5700 12800 6620 5990 5550 3700 4090 1730 3830 2280
28 14500 6290 e11900 14500 6290 5940 6740 3590 2040 3440 3900 2410
29 14200 6260 e17700 14200 --- 6720 5420 3890 1840 3380 3750 3850
30 13800 6320 e21800 13800 --- 5970 5120 3880 3420 3850 2270 2930
31 13900 --- e32600 13900 --- 5220 --- 3890 --- 4000 2110 ---
TOTAL 181810 260490 250360 451190 247910 185940 164420 134340 110190 101248 100117 95462
MEAN 5865 8683 8076 14550 8854 5998 5481 4334 3673 3266 3230 3182
MAX 14500 13800 32600 40200 13800 7150 7230 6720 4940 4880 4630 5990
MIN 1880 5670 4420 6200 5670 4420 2550 1560 1800 588 967 252
AC-FT 360600 516700 496600 894900 491700 368800 326100 266500 218600 200800 198600 189300
a 15356 15225 14079 15408 13734 14914 14304 11782 14329 15043 15147 14354
b 183500 238900 390000 416800 398500 355900 313300 248700 212800 201300 201700 190000
c 33630 33584 33723 33816 31856 33215 33078 26012 30707 33399 33677 33723
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 1965, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 2643 2828 3821 4320 5592 5331 5711 4297 3127 2376 2231 2284
MAX 5999 3710 9541 11240 12970 8212 13350 7380 5044 3037 2651 2744
(WY) 1963 1951 1956 1956 1958 1956 1952 1952 1953 1958 1958 1959
MIN 2112 2232 2219 2137 2500 3225 3404 2299 2353 1935 1971 1899
(WY) 1950 1950 1950 1949 1948 1964 1947 1947 1950 1949 1947 1949
SUMMARY STATISTICS WATER YEARS 1945 - 1965
ANNUAL TOTAL
ANNUAL MEAN 3704
HIGHEST ANNUAL MEAN 5529 1956
LOWEST ANNUAL MEAN 2658 1947
HIGHEST DAILY MEAN 32100 Dec 23 1955
LOWEST DAILY MEAN 150 Jul 19 1965
ANNUAL SEVEN-DAY MINIMUM 1610 Jul 19 1965
INSTANTANEOUS PEAK FLOW 37100 Dec 23 1955
INSTANTANEOUS PEAK STAGE 14.12 Dec 23 1955
ANNUAL RUNOFF (AC-FT) 2684000
10 PERCENT EXCEEDS 6080
50 PERCENT EXCEEDS 3010
90 PERCENT EXCEEDS 1740
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1966 - 1997, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 3381 4104 4746 6563 7050 8040 6566 5367 3916 3248 3087 3074
MAX 5865 8683 9814 20890 18670 16030 12920 11900 6237 4297 4187 3966
(WY) 1997 1997 1982 1970 1986 1983 1982 1995 1971 1974 1983 1974
MIN 2286 2533 2408 2632 2784 3241 2626 2404 2268 2291 2049 1428
(WY) 1993 1993 1991 1991 1991 1977 1977 1992 1992 1994 1992 1966
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1966 - 1997
ANNUAL TOTAL 2408224 2283477
ANNUAL MEAN 6580 6256 4918
HIGHEST ANNUAL MEAN 7693 1974
LOWEST ANNUAL MEAN 2808 1992
HIGHEST DAILY MEAN 32600 Dec 31 40200 Jan 3 53900 Jan 23 1970
LOWEST DAILY MEAN 584 Aug 11 252 Sep 7 30 Jul 12 1975
ANNUAL SEVEN-DAY MINIMUM 2930 Sep 6 2730 Sep 7 939 Sep 5 1966
INSTANTANEOUS PEAK FLOW unknown Jan 4 73000 Jan 24 1970
INSTANTANEOUS PEAK STAGE unknown Jan 4 74.65 Feb 19 1986
ANNUAL RUNOFF (AC-FT) 4777000 4529000 3563000
10 PERCENT EXCEEDS 11800 11000 8430
50 PERCENT EXCEEDS 5900 5430 3990
90 PERCENT EXCEEDS 2760 2600 2060
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Last modified: Wed Mar 10 14:10:22 PST 1999