CONNECTICUT RIVER BASIN
01129500 CONNECTICUT RIVER AT NORTH STRATFORD, NH
LOCATION.--Lat 44°44'56", long 71°37'50", Coos County, Hydrologic Unit 01080101, on left bank, at North Stratford,
400 ft downstream from Nulhegan River, and at mile 344.5.
DRAINAGE AREA.--799 mi².
PERIOD OF RECORD.--Discharge records: August 1930 to current year.
Water-quality records: Water years 1957, 1995, 1996.
REVISED RECORDS.--WSP 781: 1934(M). WSP 891: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 880.17 ft above sea level.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Flow regulated by powerplants and
by First Connecticut and Second Connecticut Lakes and Lake Francis (Reservoirs in Connecticut River Basin) 36 mi
upstream.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 12,400 ft³/s, December 2, gage height, 9.62 ft; maximum gage height,
10.10 ft, Feb. 23 (backwater from ice); minimum daily discharge, 354 ft³/s, October 8.
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
1 569 1060 801 1240 e1200 e2200 3140 4700 1240 586 523 907
2 460 881 8760 1550 e1150 e2800 2540 8290 1150 521 510 840
3 426 786 9580 1680 e1200 4030 2200 5710 1030 594 627 1270
4 419 711 4100 1760 e1180 3070 1820 4130 949 1710 713 1270
5 395 688 2290 1670 e1150 2430 1860 3160 896 1450 600 932
6 378 735 1730 2120 e1150 2100 3620 2780 835 977 557 739
7 365 788 1820 1900 e1150 1750 7710 3830 718 740 521 640
8 354 831 1700 1400 e1150 1560 8530 3210 671 705 497 602
9 591 1050 1610 1410 e1100 1520 4770 3110 627 2520 489 554
10 749 1730 1530 1500 e1100 1540 2730 3180 552 3290 484 511
11 986 1370 1420 1530 e1100 1510 2210 3240 510 1920 503 477
12 802 1100 1350 1410 e1200 1410 2000 2970 496 1420 805 467
13 641 927 1320 1380 e1160 1270 1910 3390 755 1210 994 474
14 569 772 1300 1520 e1140 1160 1940 3030 1240 1440 2210 468
15 519 691 1280 1570 e1080 1370 1730 2530 944 1940 1260 445
16 476 608 1270 e1500 e1120 1380 1890 2750 681 1640 915 420
17 449 682 1320 e1600 e1150 1250 2730 3030 581 1230 1100 398
18 424 680 2210 e1750 e1100 1260 4230 2810 606 941 959 436
19 407 669 2420 e1600 e1150 1190 5230 2690 1020 805 733 437
20 395 674 2030 e1500 e1250 1020 5030 2890 918 787 640 525
21 444 658 1600 e1420 e1550 966 4620 2750 709 771 611 1030
22 1450 629 1510 e1400 e1800 945 4400 2960 2750 698 2280 806
23 1670 601 1520 e1370 e3200 915 4550 3680 2680 644 2610 655
24 1280 555 1780 e1450 e3500 898 4450 3100 1750 609 2060 754
25 1110 574 4100 e1400 e2750 871 3720 2750 1510 580 1460 788
26 894 576 2590 e1450 e2300 896 3860 2610 1610 558 1110 794
27 757 606 2170 e1400 e2100 1030 4190 2360 1490 547 914 761
28 719 563 1870 e1250 e2150 966 4890 1690 1110 596 1150 733
29 803 573 1920 e1280 --- 1430 5080 1530 1010 620 1290 778
30 726 601 2760 e1250 --- 3680 3890 1440 918 592 1420 1160
31 1030 --- 1790 e1150 --- 3820 --- 1420 --- 493 1110 ---
TOTAL 21257 23369 73451 46410 42330 52237 111470 97720 31956 33134 31655 21071
MEAN 686 779 2369 1497 1512 1685 3716 3152 1065 1069 1021 702
MAX 1670 1730 9580 2120 3500 4030 8530 8290 2750 3290 2610 1270
MIN 354 555 801 1150 1080 871 1730 1420 496 493 484 398
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1930 - 1997, BY WATER YEAR (WY)
MEAN 1295 1608 1537 1338 1221 1623 3901 2571 1260 884 851 918
MAX 3445 3119 3095 2398 3295 6254 7348 6018 3724 2818 2475 3203
(WY) 1978 1960 1974 1973 1981 1936 1934 1972 1943 1996 1976 1954
MIN 355 583 643 549 350 271 1206 847 472 292 220 357
(WY) 1949 1948 1948 1948 1940 1940 1995 1977 1962 1955 1940 1949
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1930 - 1997
ANNUAL TOTAL 757064 586060
ANNUAL MEAN 2068 1606 1583
HIGHEST ANNUAL MEAN 2246 1974
LOWEST ANNUAL MEAN 1033 1995
HIGHEST DAILY MEAN 18900 Apr 24 9580 Dec 3 28000 Mar 19 1936
LOWEST DAILY MEAN 287 Sep 24 354 Oct 8 108 Sep 29 1960
ANNUAL SEVEN-DAY MINIMUM 315 Sep 19 400 Oct 2 128 Aug 16 1975
INSTANTANEOUS PEAK FLOW 12400 Dec 2 28700 Jun 16 1943
INSTANTANEOUS PEAK STAGE a 10.10 Feb 23 ab 20.60 Mar 6 1979
10 PERCENT EXCEEDS 4360 3190 3040
50 PERCENT EXCEEDS 1310 1230 1120
90 PERCENT EXCEEDS 552 538 452
a Ice jam.
b From floodmarks in well.
e Estimated.
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