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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 September 18, 2020 - USGS water-resources monitoring activities were restored effective August 17, 2020 at the following site:
  • 06088500 Muddy Creek near Vaughn, Montana (POR: 82 years)

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)


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 12301933 Kootenai River bl Libby Dam nr Libby MT


Lincoln County, Montana
Hydrologic Unit Code 17010101
Latitude  48°24'02.39", Longitude 115°19'07.39" NAD83
Drainage area 8,999  square miles
Gage datum 2,100 feet above NGVD29
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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 1971-10-01 -> 2021-09-30)

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 10,400 10,200 7,650 5,880 7,840 12,300 14,000 12,000 9,320 9,320 11,900 16,200
2 10,900 10,600 7,810 5,990 8,100 13,000 14,300 11,900 8,750 9,400 12,100 16,700
3 11,400 10,400 8,060 5,920 8,080 13,500 14,500 11,700 8,820 9,510 12,300 16,000
4 11,300 9,540 7,670 6,020 8,080 13,700 14,100 11,600 8,920 9,910 12,500 16,500
5 11,900 9,480 7,360 6,080 8,050 13,600 13,700 11,400 8,840 10,000 12,000 17,100
6 11,900 9,570 7,130 6,120 8,050 13,700 13,300 11,400 8,580 9,690 11,900 16,900
7 11,900 10,600 7,190 6,160 7,730 13,900 13,100 11,300 8,420 9,610 11,800 17,200
8 11,800 10,900 7,380 6,410 7,650 14,200 12,500 11,500 8,790 9,680 12,300 17,600
9 12,100 10,200 7,430 6,320 7,550 14,600 12,400 11,600 9,470 9,680 13,000 17,500
10 11,800 9,630 7,180 6,380 7,730 14,600 12,500 11,300 9,620 10,100 13,600 16,300
11 11,900 9,850 6,460 6,710 7,770 15,400 12,500 11,300 9,160 10,200 13,500 16,700
12 12,300 9,200 6,000 7,100 7,750 15,600 12,200 10,700 8,870 10,400 13,400 17,100
13 12,600 9,350 5,950 7,140 7,840 15,500 11,600 10,700 9,070 10,600 13,400 17,300
14 12,500 9,760 6,110 6,800 8,010 15,500 11,600 10,800 9,310 10,600 13,400 17,400
15 11,800 9,820 6,240 6,900 8,530 15,800 11,900 10,600 9,600 10,600 14,000 17,100
16 11,400 9,730 6,180 6,860 9,230 16,000 12,000 10,700 9,280 10,800 14,400 16,900
17 11,000 9,000 6,180 6,890 9,890 15,600 12,300 11,000 9,420 11,100 15,000 16,700
18 10,600 8,770 5,990 6,900 9,980 15,500 12,000 10,900 9,660 10,900 15,100 16,600
19 10,200 8,640 5,840 6,810 10,200 15,400 11,600 10,600 9,270 11,200 15,500 16,800
20 9,850 8,970 5,520 6,640 10,200 15,200 11,400 10,900 9,610 10,800 15,400 16,500
21 9,860 8,980 5,680 6,700 10,600 15,000 11,600 11,100 9,810 10,200 15,600 16,500
22 10,200 8,780 5,830 7,010 11,100 14,700 11,700 10,600 10,000 10,200 14,400 16,800
23 10,400 8,980 5,820 7,060 11,600 14,800 11,500 10,600 9,620 10,300 14,200 16,800
24 10,600 8,820 5,980 7,140 11,600 14,800 11,400 10,600 9,620 10,600 14,000 15,600
25 10,800 8,530 5,890 7,150 11,500 14,800 11,500 10,400 9,950 10,600 14,200 12,600
26 10,700 8,340 5,850 7,180 11,700 14,900 11,500 9,760 9,580 10,900 14,000 13,000
27 10,400 8,150 5,810 7,090 11,500 14,300 11,200 9,500 9,770 10,800 13,900 13,400
28 10,200 7,680 5,980 7,350 11,600 14,100 11,400 9,690 10,100 10,800 14,100 14,200
29 10,400 7,350 5,930 7,680 11,800 14,200 11,500 9,510 10,000 11,100 14,000 13,800
30 10,300   5,640 7,730 11,500 14,000 11,600 9,710 10,100 11,100 14,700 12,700
31 10,400   5,840   11,600   12,000 9,670   11,500   11,900