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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
1 854 789 920 1,820 1,420 682 542 397 285 339 885 932
2 810 774 908 1,940 1,350 653 521 385 252 376 834 968
3 820 786 906 2,090 1,310 682 555 368 233 389 758 962
4 813 868 916 2,150 1,250 641 550 316 226 415 712 923
5 816 914 891 2,260 1,180 659 499 311 233 424 674 877
6 769 897 886 2,320 1,120 727 467 288 244 416 661 855
7 736 870 886 2,310 1,040 783 425 278 284 390 681 864
8 683 795 891 2,290 969 783 376 257 307 348 701 897
9 668 740 980 2,210 928 773 356 250 316 359 743 891
10 704 681 1,040 2,110 881 707 367 260 309 366 737 940
11 744 671 1,040 2,060 854 684 382 263 292 406 771 1,000
12 778 682 1,110 2,010 855 654 353 271 284 468 735 1,020
13 830 719 1,190 2,020 856 653 390 278 279 497 738 1,010
14 856 730 1,210 2,070 897 642 436 292 258 485 753 995
15 868 718 1,180 2,010 898 551 434 287 248 435 751 998
16 819 716 1,220 1,850 896 523 376 267 227 443 747 990
17 777 719 1,340 1,860 899 504 338 241 219 508 769 945
18 748 747 1,460 1,880 902 486 348 242 212 588 802 967
19 743 750 1,460 1,780 909 452 368 280 261 592 777 925
20 731 738 1,500 1,720 934 426 387 276 261 594 746 873
21 717 734 1,520 1,720 943 426 364 257 251 612 749 857
22 713 744 1,490 1,670 898 401 335 267 246 580 759 889
23 710 765 1,480 1,550 832 418 318 265 223 529 763 941
24 695 793 1,530 1,570 804 458 327 294 236 536 729 996
25 726 871 1,610 1,640 854 434 368 319 258 546 727 1,030
26 805 910 1,670 1,600 940 438 358 292 278 542 760 1,060
27 884 919 1,700 1,570 934 431 334 242 304 611 813 1,070
28 897 966 1,780 1,540 864 442 312 217 345 694 844 1,120
29 896 1,100 1,850 1,530 804 504 309 241 350 770 853 1,120
30 858   1,820 1,490 777 549 362 314 343 851 895 1,050
31 814   1,800   719   399 320   901   929