CONNECTICUT RIVER BASIN
01144500 CONNECTICUT RIVER AT WEST LEBANON, NH
LOCATION.--Lat 43°38'46", long 72°18'46", Grafton County, Hydrologic Unit 01080104, on left bank, 50 ft downstream from
railroad bridge at West Lebanon, 500 ft downstream from White River, and at mile 215.0.
DRAINAGE AREA.--4,092 mi².
PERIOD OF RECORD.--Discharge records: October 1911 to November 1976 (published as "at White River Junction, VT"),
November 1978 to current year.
Water-quality records: Water year 1954, 1994.
REVISED RECORDS.--WSP 741: 1932 (adjusted monthly and yearly figures only). WSP 781: 1928(M). WSP 891: Drainage
area. WSP 1301: 1922-26(M).
GAGE.--Water-stage recorder. Datum of gage is 321.52 ft above sea level. Prior to June 16, 1918, nonrecording gage on
downstream side of pier of railroad bridge 50 ft upstream at same datum. June 16, 1918, to November 2, 1930,
nonrecording gage at various locations on upstream and downstream sides of railroad bridge at same datum.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Flow regulated by powerplants and
by First Connecticut and Second Connecticut Lakes, Lake Francis, Moore and Comerford Reservoirs, Union Village
Reservoir (Reservoirs in Connecticut River Basin), and other reservoirs. These reservoirs have a combined usable
capacity of about 17.2 billion ft³.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge. 136,000 ft³/s, November 4 1927, gage height, 35.0 ft, present site;
minimum daily discharge 82 ft³/s, August 8, 1965. Stage and discharge of flood November 4, 1927, are the greatest
since at least 1760.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 41,100 ft³/s December 2, gage height, 16.96; minimum daily discharge,
1,180 ft³/s, October 3.
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 2860 6860 5040 7470 4780 11600 16000 16800 6820 4190 2770 4300
2 2160 6460 26400 7430 4450 11300 15500 22100 9230 2890 1570 5190
3 1180 4470 34800 9820 4890 13400 14600 23900 7100 2640 1560 4490
4 3250 4900 25800 9360 5520 12700 14400 25800 6950 4980 1740 4170
5 1580 4320 21400 7400 4510 11500 15700 20600 5510 4600 2170 3880
6 1610 5020 14900 9600 4670 11300 21400 16800 4350 3070 1920 3230
7 1970 4230 10200 8780 5010 11500 31700 17300 3790 4790 1610 3170
8 2730 6920 9040 8860 4400 9970 35400 17100 3900 3760 1580 3100
9 2890 12100 9340 7670 3970 9250 29700 16000 4030 4160 1400 3200
10 3400 21100 9360 8330 4910 9600 22300 14500 3540 5130 2530 2150
11 4470 13800 8980 9060 4740 9830 15000 14300 3610 6500 2920 2430
12 4090 8110 8030 6180 4630 9050 13300 13400 3250 5750 2290 3730
13 3280 7550 8480 6800 5580 8730 14400 13400 3460 4850 1800 2890
14 3490 6440 8100 6950 5100 8560 13300 13700 4270 5100 7110 3550
15 3080 5320 7740 4960 4210 4630 11600 12800 4810 9590 6020 2890
16 3160 4470 8460 6340 4610 4560 11900 12900 3920 20000 4910 3200
17 2770 4010 7260 6210 2160 5860 13400 14300 4180 11700 4090 2650
18 2480 4500 11300 e6580 4650 5940 18400 14200 4060 8440 4340 2680
19 3140 5290 13900 e6000 4620 5610 32000 14200 9600 7890 3630 2410
20 3650 5590 12900 e5800 6140 6820 31700 15300 9210 5890 2610 1650
21 19800 4710 10100 6090 6320 6190 30300 12700 6180 5290 3550 2380
22 28000 4790 8800 6370 8920 4480 26300 10600 6970 4020 7740 3240
23 15700 4000 7950 6600 12300 3280 19000 11200 8850 2780 8400 2810
24 12300 3970 10100 7270 8180 4190 17300 10800 10400 2100 6340 2570
25 12100 5110 19000 7100 8010 4660 17900 11300 7870 2600 5980 2480
26 9670 5160 15300 6680 6160 5430 18400 10800 6660 2050 3830 3280
27 8070 6000 14900 5600 7860 7780 17000 11000 5050 2520 4090 2190
28 6540 3140 13500 5220 13900 7780 20000 9030 4610 2990 4700 2160
29 5200 2350 11100 6040 --- 8880 23900 8320 3270 3390 7200 2820
30 4880 5130 11300 5860 --- 13000 19800 6820 4590 2310 6670 3300
31 5510 --- 10700 6000 --- 15900 --- 6900 --- 2440 5120 ---
TOTAL 185010 185820 394180 218430 165200 263280 601600 438870 170040 158410 122190 92190
MEAN 5968 6194 12720 7046 5900 8493 20050 14160 5668 5110 3942 3073
MAX 28000 21100 34800 9820 13900 15900 35400 25800 10400 20000 8400 5190
MIN 1180 2350 5040 4960 2160 3280 11600 6820 3250 2050 1400 1650
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1912 - 1977, 1979 - 1997, BY WATER YEAR (WY)
MEAN 4790 6813 6284 5036 4787 9152 20280 13140 6222 3742 3056 3194
MAX 12990 24860 16890 11680 17650 35510 32900 25890 16870 14050 8904 12900
(WY) 1982 1928 1984 1996 1981 1936 1934 1972 1947 1973 1990 1954
MIN 1314 2313 1795 1627 1419 1626 5536 4556 1946 1393 1072 1007
(WY) 1948 1948 1948 1948 1940 1940 1995 1987 1921 1921 1942 1921
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1912 - 1977, 1979 - 1997
ANNUAL TOTAL 3865000 2995220
ANNUAL MEAN 10560 8206 7151
HIGHEST ANNUAL MEAN 10700 1928
LOWEST ANNUAL MEAN 4101 1965
HIGHEST DAILY MEAN 48100 Apr 27 35400 Apr 8 129000 Nov 4 1927
LOWEST DAILY MEAN 1180 Oct 3 1180 Oct 3 82 Aug 8 1965
ANNUAL SEVEN-DAY MINIMUM 1530 Sep 11 1710 Aug 3 731 Aug 27 1934
INSTANTANEOUS PEAK FLOW 41100 Dec 2 136000 Nov 4 1927
INSTANTANEOUS PEAK STAGE 16.96 Dec 2 35.00 Nov 4 1927
10 PERCENT EXCEEDS 23000 16000 16000
50 PERCENT EXCEEDS 7490 6160 4600
90 PERCENT EXCEEDS 2470 2650 1670
e Estimated.
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