CONNECTICUT RIVER BASIN
01129200 CONNECTICUT RIVER BELOW INDIAN STREAM, NEAR PITTSBURG, NH
LOCATION.--Lat 45°02'25", long 71°26'37", Coos County, Hydrologic Unit 01080101, on right bank, 1,200 ft downstream
from Indian Stream, 2.5 mi west of Pittsburg, and at mile 376.5.
DRAINAGE AREA.--254 mi².
PERIOD OF RECORD.--Discharge records: October 1956 to current year.
REVISED RECORDS.--WDR MA-NH-RI-VT-73-l: 1958, 1960(M), 1969(M).
GAGE.--Water-stage recorder. Elevation of gage is 1,150 ft above sea level, from topographic map.
REMARKS.--Record good. Flow regulated by First Connecticut and Second Connecticut Lakes and Lake Francis 3.7 mi
upstream (Reservoirs in Connecticut River Basin).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 5,260 ft³/s, April 27 and July 21, 1996, gage height, 7.97 ft, from
rating curve extended above 2,600 ft³/s; minimum daily 30 ft³/s, August 6, 1965.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 2,560 ft³/s, December 2, gage height 5.63 ft; minimum daily discharge,
153 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
1 187 289 202 708 708 819 792 819 425 251 363 273
2 172 268 1420 729 705 958 677 1790 409 245 359 262
3 165 250 1310 735 702 1090 549 820 396 264 403 429
4 164 229 486 722 702 940 300 684 387 530 390 342
5 162 221 352 716 702 826 322 549 380 454 372 266
6 160 233 538 790 702 765 594 503 303 359 367 227
7 155 266 767 793 698 723 1370 658 260 310 360 213
8 153 291 744 723 695 699 1330 513 257 327 358 211
9 171 288 741 701 695 694 606 501 224 697 354 207
10 224 380 728 697 716 691 456 556 192 913 349 201
11 296 344 711 690 748 676 361 615 195 824 358 183
12 244 296 696 679 748 694 327 622 187 759 374 182
13 212 262 694 697 748 697 330 796 229 726 418 184
14 200 228 685 758 745 687 319 634 285 728 569 184
15 192 212 681 754 741 681 292 538 246 607 446 185
16 180 194 678 753 741 681 329 797 235 522 408 184
17 175 207 681 751 736 669 486 995 193 446 397 210
18 171 206 803 740 734 668 697 1070 193 403 382 224
19 166 210 835 734 733 544 705 1260 222 396 373 227
20 163 212 775 728 734 461 708 1400 223 421 365 259
21 164 207 716 728 758 461 674 1380 271 410 365 357
22 209 200 716 724 844 461 668 1410 755 392 442 310
23 295 193 721 728 990 456 761 1570 900 384 646 298
24 271 181 751 732 1040 450 764 1420 847 377 566 357
25 252 183 1110 734 971 376 658 1370 874 373 468 503
26 228 186 860 734 883 337 715 1360 989 367 423 487
27 210 184 820 727 851 342 815 931 801 367 310 478
28 210 182 767 718 831 348 896 656 677 370 260 472
29 216 182 802 715 --- 389 786 634 663 376 299 487
30 218 182 1000 712 --- 689 620 620 392 370 291 549
31 265 --- 785 709 --- 843 --- 496 --- 365 290 ---
TOTAL 6250 6966 23575 22559 21601 19815 18907 27967 12610 14333 12125 8951
MEAN 202 232 760 728 771 639 630 902 420 462 391 298
MAX 296 380 1420 793 1040 1090 1370 1790 989 913 646 549
MIN 153 181 202 679 695 337 292 496 187 245 260 182
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1957 - 1997, BY WATER YEAR (WY)
MEAN 554 558 740 787 778 553 615 515 381 407 436 448
MAX 1342 1057 1485 1175 1325 1088 1030 1691 863 1187 1043 1095
(WY) 1978 1978 1960 1960 1974 1979 1974 1974 1984 1996 1976 1963
MIN 111 181 384 462 376 209 247 162 80.9 55.7 64.7 111
(WY) 1969 1967 1979 1979 1980 1962 1995 1988 1962 1965 1975 1968
SUMMARY STATISTICS FOR 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1957 - 1997
ANNUAL TOTAL 259593 195659
ANNUAL MEAN 709 536 563
HIGHEST ANNUAL MEAN 789 1976
LOWEST ANNUAL MEAN 379 1995
HIGHEST DAILY MEAN 4240 Apr 27 1790 May 2 4240 Apr 27 1996
LOWEST DAILY MEAN 153 Sep 24 153 Oct 8 30 Aug 6 1965
ANNUAL SEVEN-DAY MINIMUM 155 Sep 22 161 Oct 3 33 Aug 20 1975
INSTANTANEOUS PEAK FLOW 2560 Dec 2 ab 5260 Apr 27 1996
INSTANTANEOUS PEAK STAGE 5.63 Dec 2 b 7.97 Apr 27 1996
10 PERCENT EXCEEDS 1330 833 1020
50 PERCENT EXCEEDS 566 487 518
90 PERCENT EXCEEDS 185 198 151
a From rating curve extended above 2,600 ft³/s.
b Also occurred on July 21, 1996.
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