CONNECTICUT RIVER BASIN
01138500 CONNECTICUT RIVER AT WELLS RIVER, VT
LOCATION.--Lat 44°09'13", long 72°02'34", Orange County, Hydrologic Unit 0l080l0l, on right bank, at village of Wells
River, 200 ft downstream from bridge on U.S. Highway 302, 400 ft upstream from Wells River, l,200 ft downstream
from Ammonoosuc River, and at mile 266.0.
DRAINAGE AREA.--2,644 mi².
PERIOD OF RECORD.--Discharge records: October l949 to current year. October and November l949 monthly discharge only,
published in WSP l30l.
Water-quality records: 1952, 1957, 1979 to 1986.
REVISED RECORDS.--WDR NH-VT-93-1:1992.
GAGE.--Water-stage recorder. Datum of gage is 399.75 ft above sea level.
REMARKS.--Records good except those for estimated daily discharge, which are fair. Flow regulated by powerplants, by
First Connecticut and Second Connecticut Lakes, Lake Francis, Moore and Comerford Reservoirs (Reservoirs in
Connecticut River Basin), and other reservoirs. These reservoirs have a combined capacity of about
l4.8 billion ft³.
EXTREMES FOR PERIOD OF RECORD--Maximum discharge, 57,100 ft³/s, July 1, 1973, gage height, 17.35 ft, from peak-stage
indicator; minimum daily discharge 152 ft³/s, August 28, 1960.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 27,500 ft³/s, December 2, gage height, 9.46 ft; minimum daily discharge,
1,100 ft³/s, October 2.
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 2770 4830 3670 6110 5030 7930 10400 11600 6170 3320 2720 4130
2 1100 4130 17700 7420 2850 7980 10100 16300 6260 1980 1280 4840
3 2070 4100 20400 6080 3860 9120 9390 17900 6040 1420 1520 4250
4 1890 3390 16200 5740 3810 9240 9580 16500 4410 4400 1650 3190
5 1290 3390 15100 4700 3570 8880 9800 14200 4770 4460 1310 3610
6 1540 3440 9310 5780 2980 8410 12200 10200 3700 2660 1710 2670
7 1450 3680 6140 6250 4490 7620 18200 11100 2590 3580 1420 2900
8 1470 3920 6260 6610 2730 7370 21700 11000 3010 2230 1200 2730
9 2840 10300 6960 7000 3030 7460 17800 10100 3170 4240 1530 2660
10 3010 11200 6930 6990 3280 7400 12100 9350 2690 5180 1490 1730
11 2950 8150 6000 5240 3510 7480 9180 9260 3200 5920 2510 2360
12 2990 5990 6130 5660 2940 6910 9170 10200 2480 4910 2010 3080
13 1950 4090 5860 5050 3240 6880 9120 10100 2600 4340 1960 2130
14 2250 4330 5370 4550 4500 6350 8070 8960 4210 4140 6660 2050
15 1980 3490 5290 4150 3310 3110 6750 9290 3820 14100 4650 2960
16 2930 2610 5320 4420 2920 3410 6920 9890 4110 15800 3820 2250
17 2440 2790 5580 4490 2990 4170 7630 11300 3170 9890 3850 2050
18 2130 3320 7250 e5200 3600 4750 10200 10900 3290 7430 4030 2840
19 2840 3460 8820 e5400 3790 3620 17800 11900 7010 6090 3530 1840
20 1880 3260 7860 e5300 3980 4600 18800 10700 6660 4510 2290 2210
21 9000 3270 5710 e5180 4160 4370 17800 7530 5670 3660 3350 1620
22 13600 3480 5890 e5200 e3000 2570 13900 8230 5220 3610 6380 2980
23 7890 2280 5540 5220 e3500 2210 11400 8870 9800 2300 6080 2170
24 8910 3010 6350 5500 e3150 3210 11400 9070 8060 1990 3940 2370
25 8260 2840 10500 5550 e3800 2940 12100 9060 6200 2330 4270 2300
26 7560 2790 11100 4010 e4200 3630 11800 8620 6190 1770 4080 2080
27 3790 3590 9550 5730 e3500 4450 11000 7290 5220 1790 3610 2350
28 4390 1920 8450 4070 6080 5150 13200 7270 4210 3360 5030 1510
29 3970 2460 7080 3710 --- 5750 15300 6630 2960 2810 6110 2410
30 3850 3230 8040 5800 --- 7990 12700 5970 3900 1950 6180 2430
31 4300 --- 7710 6290 --- 9290 --- 5150 --- 1860 5010 ---
TOTAL 119290 122740 258070 168400 101800 184250 365510 314440 140790 138030 105180 78700
MEAN 3848 4091 8325 5432 3636 5944 12180 10140 4693 4453 3393 2623
MAX 13600 11200 20400 7420 6080 9290 21700 17900 9800 15800 6660 4840
MIN 1100 1920 3670 3710 2730 2210 6750 5150 2480 1420 1200 1510
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1950 - 1997, BY WATER YEAR (WY)
MEAN 3771 4833 4664 3701 3800 5826 12630 8501 4391 2806 2534 2493
MAX 9801 9815 11320 7717 10050 13420 20110 17120 10320 8566 6709 10810
(WY) 1978 1960 1974 1996 1981 1979 1954 1972 1984 1996 1990 1954
MIN 1226 2008 1445 1632 1824 2492 3634 3479 1906 1206 1013 883
(WY) 1964 1979 1979 1981 1980 1962 1995 1987 1988 1991 1970 1978
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1950 - 1997
ANNUAL TOTAL 2629663 2097200
ANNUAL MEAN 7185 5746 5001
HIGHEST ANNUAL MEAN 7355 1996
LOWEST ANNUAL MEAN 3211 1965
HIGHEST DAILY MEAN 37200 Apr 25 21700 Apr 8 50600 Mar 27 1953
LOWEST DAILY MEAN 803 Sep 23 1100 Oct 2 152 Aug 28 1960
ANNUAL SEVEN-DAY MINIMUM 1110 Sep 22 1440 Aug 2 522 Aug 1 1955
INSTANTANEOUS PEAK FLOW 27500 Dec 2 57100 Jul 1 1973
INSTANTANEOUS PEAK STAGE 9.46 Dec 2 a 17.35 Jul 1 1973
INSTANTANEOUS LOW FLOW 413 Oct 2
10 PERCENT EXCEEDS 15200 10800 10400
50 PERCENT EXCEEDS 5310 4490 3560
90 PERCENT EXCEEDS 1940 2110 1290
a From peak stage indicator.
e Estimated.
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