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USGS Daily Statistics for Montana

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Questions or concerns about USGS streamflow data in Montana and Wyoming can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).


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 06102050 Marias River near Loma MT


Chouteau County, Montana
Hydrologic Unit Code 10030203
Latitude  47°56'45.25", Longitude 110°34'51.02" NAD83
Drainage area 7,027  square miles
Contributing drainage area 6,480  square miles
Gage datum 2,570 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 1959-10-01 -> 2019-09-30)

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
1 373 280 488 665 903 1,360 1,400 930 875 873 692 551
2 368 293 466 654 894 1,350 1,350 932 872 873 705 499
3 362 320 486 659 888 1,420 1,260 966 869 866 701 514
4 355 340 477 650 911 1,480 1,220 970 880 834 710 473
5 343 350 487 652 933 1,500 1,210 958 891 816 716 434
6 339 349 473 666 953 1,490 1,190 936 898 813 725 419
7 323 348 439 677 959 1,490 1,140 958 904 811 722 402
8 318 332 425 666 955 1,510 1,110 1,050 899 808 721 391
9 310 358 436 677 965 1,540 1,110 1,070 894 796 726 387
10 305 375 434 690 977 1,540 1,190 1,030 895 794 725 387
11 301 397 428 729 983 1,750 1,100 1,070 906 796 733 384
12 294 426 440 785 1,000 1,740 1,120 1,120 913 783 736 386
13 282 440 460 812 1,040 1,760 1,130 1,120 916 773 738 395
14 274 458 478 816 1,070 1,810 1,140 1,100 888 771 740 380
15 275 466 477 856 1,110 1,830 1,100 1,020 868 777 739 382
16 275 477 459 867 1,130 1,860 1,080 967 855 767 738 414
17 268 485 480 926 1,150 1,790 1,050 950 835 753 740 423
18 263 482 481 1,030 1,180 1,670 1,020 952 829 743 738 417
19 263 488 479 1,030 1,190 1,660 1,010 959 850 746 741 389
20 280 500 513 970 1,200 1,670 1,010 958 872 738 729 389
21 290 515 532 890 1,190 1,670 1,030 958 861 727 710 367
22 282 536 619 831 1,150 1,630 1,050 929 865 715 701 369
23 255 545 701 822 1,150 1,580 1,060 909 865 702 703 376
24 247 548 799 821 1,170 1,500 1,040 905 874 714 705 379
25 247 534 828 826 1,180 1,500 1,050 894 894 702 713 368
26 391 525 867 834 1,190 1,520 962 888 890 697 714 358
27 262 511 832 865 1,220 1,500 951 889 889 696 714 356
28 268 494 801 888 1,220 1,480 935 880 890 697 697 360
29 270 338 901 884 1,250 1,440 911 876 887 693 690 366
30 272   840 883 1,290 1,410 895 873 869 685 621 370
31 275   821   1,360   919 871   682   375