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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).

Updated June 11, 2020 - USGS water-resources monitoring activities will be restored at the following sites:
  • 12323600 Silver Bow Creek at Opportunity, Montana (POR: 31 years)
  • 12323750 Silver Bow Creek at Warm Springs, Montana (POR: 35 years)

Updated May 12, 2020 - USGS water-resources monitoring activities were suspended effective June 1, 2020 at the following site:
  • 06088500 Muddy Creek near Vaughn, Montana (POR: 82 years)
USGS monitoring activities at this site was funded by our partner and USGS Cooperative Matching Funds (06088500). Lack of partner funding for this site resulted in suspension of all USGS monitoring activities. Efforts are ongoing to secure funding for future monitoring. Historical data will continue to be available from USGS.

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 05018000 St. Mary Canal at intake near Babb MT


Glacier County, Montana
Hydrologic Unit Code 10010002
Latitude  48°51'10", Longitude 113°25'01" NAD83
Gage datum 4,470 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 1917-10-01 -> 2020-09-30)

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 1.1 0.98 1.7 85 316 495 571 614 427 88 31 1.1
2 1.1 0.98 1.8 92 329 500 575 613 422 76 32 1.1
3 1.1 0.98 1.8 94 347 507 578 611 412 74 36 1.1
4 1.1 0.98 1.8 95 361 518 582 610 400 68 40 1.1
5 1.1 0.98 1.9 98 365 522 572 611 382 60 43 1.1
6 1.1 0.97 3.5 106 372 516 571 610 362 52 43 1.1
7 1.0 0.97 4.3 115 381 519 581 609 342 43 43 1.1
8 1.0 0.97 6.9 122 385 518 585 592 336 36 43 1.1
9 1.0 0.97 9.5 129 390 521 588 594 334 32 41 1.1
10 1.0 0.96 13 132 395 539 590 591 322 28 35 1.1
11 1.0 0.96 16 134 401 541 593 581 304 25 32 1.1
12 1.0 0.96 19 141 410 545 597 587 283 22 31 1.1
13 1.0 0.96 19 148 415 545 605 585 268 22 21 1.1
14 1.0 0.95 21 154 416 543 609 578 258 22 8.4 1.1
15 1.0 0.95 22 163 433 535 612 574 239 22 7.9 1.1
16 1.0 0.95 24 174 439 536 615 573 232 22 7.7 1.1
17 1.0 0.95 28 185 452 533 610 565 223 22 7.1 1.1
18 1.0 0.94 28 197 453 533 611 558 210 25 7.9 1.1
19 1.0 0.94 30 205 459 534 613 553 198 30 11 1.1
20 1.0 0.94 30 212 461 537 614 550 192 33 7 1.1
21 1.0 0.94 34 220 461 538 612 544 179 36 0.53 1.1
22 1.0 0.94 37 237 475 536 606 527 164 37 0.46 1.1
23 1.0 0.93 41 247 471 536 602 517 152 35 0.42 1.1
24 1.0 0.93 46 264 459 543 600 506 140 30 0.41 1.1
25 1.0 3.2 50 280 459 549 602 502 128 29 0.11 1.1
26 1.0 3.4 55 290 460 546 606 491 119 28 0.11 1.1
27 1.0 3.6 59 298 469 549 608 488 113 27 0.12 1.1
28 0.99 4.9 63 301 479 559 612 478 105 26 0.1 1.1
29 0.99 8.1 66 302 489 562 614 473 96 26 0.11 1.1
30 0.99   71 304 496 569 613 459 95 24 0.11 1.1
31 0.99   78   494   613 444   27   1.1