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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01085500 CONTOOCOOK R BL HOPKINTON DAM AT W HOPKINTON, NH


Merrimack County, New Hampshire
Hydrologic Unit Code 01070003
Latitude  43°11'34", Longitude  71°44'52" NAD27
Drainage area 427  square miles
Gage datum 355.15 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1962-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 863 779 910 1,820 1,420 682 542 397 285 339 871 922
2 825 763 898 1,940 1,350 653 521 385 252 376 821 955
3 831 775 896 2,090 1,310 682 555 368 233 389 746 949
4 821 856 908 2,150 1,250 641 550 316 226 409 702 910
5 825 900 882 2,260 1,180 659 499 311 233 417 664 864
6 773 882 885 2,320 1,120 727 467 288 244 409 651 843
7 738 855 903 2,310 1,040 783 425 278 284 384 670 851
8 684 782 916 2,290 969 783 376 257 307 342 689 883
9 666 728 1,000 2,210 928 773 356 250 316 353 730 878
10 700 671 1,050 2,110 881 707 367 260 309 360 724 926
11 737 662 1,050 2,060 854 684 382 263 292 399 757 990
12 771 673 1,120 2,010 855 654 353 271 284 460 722 1,030
13 822 709 1,190 2,020 856 653 390 278 279 488 725 1,030
14 848 720 1,220 2,070 897 642 436 292 258 477 739 1,010
15 860 708 1,180 2,010 898 551 434 287 248 428 737 1,000
16 811 706 1,230 1,850 896 523 376 267 227 442 733 992
17 769 709 1,360 1,860 899 504 338 241 219 504 754 947
18 739 736 1,500 1,880 902 486 348 242 212 580 788 967
19 735 739 1,520 1,780 909 452 368 280 261 585 764 931
20 723 728 1,550 1,720 934 426 387 276 261 587 733 883
21 710 726 1,550 1,720 943 426 364 257 251 604 736 865
22 706 736 1,520 1,670 898 401 335 267 246 572 747 890
23 703 756 1,500 1,550 832 418 318 265 223 521 754 935
24 687 783 1,550 1,570 804 458 327 294 236 528 727 990
25 717 859 1,620 1,640 854 434 368 319 258 537 722 1,030
26 794 897 1,670 1,600 940 438 358 292 278 533 751 1,050
27 872 905 1,700 1,570 934 431 334 242 304 601 803 1,060
28 885 954 1,780 1,540 864 442 312 217 345 683 833 1,110
29 884 1,100 1,850 1,530 804 504 309 241 350 758 842 1,110
30 847   1,820 1,490 777 549 362 314 343 838 887 1,040
31 803   1,800   719   399 320   886   932