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USGS Surface-Water Daily Statistics for Michigan

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NOTE: During winter months, stage and discharge may be significantly affected by backwater from ice, resulting in incorrect discharge data. Consequently, discharge data may not be displayed during periods of ice effect. Click here for more information.

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 04040000 ONTONAGON RIVER NEAR ROCKLAND, MI


Ontonagon County, Michigan
Hydrologic Unit Code 04020102
Latitude  46°43'15", Longitude  89°12'25" NAD27
Drainage area 1,340  square miles
Gage datum 638.66 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 1941-10-01 -> 2024-09-30)

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
1 811 781 899 3,240 3,160 1,590 1,140 664 762 985 1,230 1,070
2 827 773 879 3,220 2,970 1,480 1,220 726 722 938 1,370 1,010
3 819 763 863 3,270 2,830 1,380 1,270 757 762 960 1,340 984
4 813 764 862 3,280 2,640 1,310 1,270 920 752 972 1,200 1,050
5 810 772 872 3,340 2,610 1,270 1,180 866 758 1,230 1,170 1,080
6 807 762 917 3,580 2,600 1,380 1,140 755 740 1,270 1,190 1,060
7 811 776 1,010 3,840 2,510 1,360 1,050 762 691 1,260 1,140 965
8 804 777 1,090 4,030 2,420 1,300 995 740 707 1,120 1,160 927
9 804 772 1,060 3,980 2,620 1,270 1,010 697 777 1,070 1,150 910
10 803 772 1,010 3,990 2,570 1,370 963 704 812 1,240 1,260 957
11 805 767 1,060 4,220 2,390 1,370 935 684 804 1,180 1,290 916
12 802 767 1,150 4,460 2,400 1,350 915 665 750 1,180 1,270 921
13 797 780 1,300 4,680 2,210 1,320 927 648 775 1,140 1,310 913
14 797 780 1,530 4,670 2,150 1,240 916 637 768 1,140 1,310 907
15 802 800 1,710 4,590 1,990 1,320 851 606 719 1,220 1,260 935
16 788 786 1,840 4,650 1,830 1,310 811 704 731 1,160 1,400 992
17 777 787 1,820 4,860 1,700 1,430 826 726 830 1,070 1,370 992
18 778 800 1,890 4,800 1,700 1,450 838 704 821 1,080 1,320 929
19 783 809 1,790 4,860 1,740 1,310 879 671 814 1,040 1,270 895
20 774 829 1,610 4,670 1,800 1,300 850 628 765 1,020 1,260 883
21 776 869 1,610 4,580 1,750 1,320 896 732 878 1,030 1,320 875
22 778 884 1,720 4,590 1,810 1,300 849 1,100 893 1,030 1,210 858
23 785 870 1,810 4,660 1,750 1,340 852 925 834 1,110 1,130 854
24 779 877 1,930 4,570 1,780 1,430 816 819 935 1,280 1,130 869
25 780 864 2,010 4,240 1,730 1,370 774 740 954 1,550 1,110 856
26 770 883 2,050 3,840 1,720 1,310 750 713 962 1,360 1,070 877
27 788 927 2,260 3,590 1,620 1,340 714 665 992 1,270 1,070 859
28 797 892 2,580 3,450 1,520 1,260 733 702 918 1,280 1,030 856
29 799 975 2,720 3,380 1,600 1,130 717 713 884 1,190 1,070 850
30 795   2,880 3,260 1,540 1,050 685 699 919 1,210 1,100 839
31 796   2,890   1,640   681 799   1,190   837