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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 -> 2023-09-30)

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 10,600 10,100 7,450 5,810 7,840 12,600 13,900 11,900 9,260 9,150 11,600 16,200
2 11,100 10,400 7,600 5,920 8,160 13,200 14,100 11,800 8,700 9,200 12,000 16,700
3 11,400 10,200 7,840 5,860 8,150 13,600 14,400 11,600 8,770 9,300 12,200 16,100
4 11,400 9,430 7,470 5,950 8,140 13,800 14,000 11,500 8,890 9,690 12,300 16,500
5 11,900 9,370 7,170 6,000 8,110 13,700 13,600 11,300 8,810 9,800 11,800 17,200
6 11,800 9,460 7,020 6,050 8,120 13,800 13,200 11,300 8,560 9,480 11,700 17,100
7 11,800 10,400 7,070 6,080 7,840 14,000 13,100 11,300 8,410 9,400 11,800 17,400
8 11,700 10,700 7,260 6,330 7,770 14,200 12,500 11,400 8,770 9,470 12,300 17,800
9 11,900 10,100 7,300 6,240 7,670 14,600 12,300 11,500 9,420 9,470 13,200 17,700
10 11,700 9,500 7,070 6,290 7,850 14,600 12,500 11,200 9,570 9,860 13,800 16,500
11 11,800 9,710 6,370 6,610 7,880 15,300 12,400 11,200 9,120 9,990 13,700 16,800
12 12,100 9,070 5,930 6,980 7,870 15,600 12,100 10,700 8,840 10,200 13,500 17,300
13 12,500 9,220 5,880 7,020 7,980 15,400 11,600 10,600 9,040 10,300 13,300 17,500
14 12,400 9,770 6,030 6,690 8,440 15,300 11,600 10,700 9,270 10,400 13,500 17,500
15 11,700 9,830 6,160 6,790 8,930 15,700 11,800 10,600 9,550 10,400 14,200 17,200
16 11,400 9,710 6,100 6,750 9,760 15,800 12,000 10,600 9,240 10,500 14,200 17,000
17 11,200 9,000 6,100 6,780 10,500 15,400 12,200 11,000 9,380 10,800 14,900 16,800
18 10,900 8,780 5,920 6,790 10,600 15,300 12,000 10,800 9,610 10,700 15,100 16,700
19 10,500 8,500 5,770 6,710 10,700 15,200 11,600 10,500 9,240 10,900 15,500 17,000
20 10,000 8,800 5,470 6,550 10,800 15,000 11,400 10,800 9,560 10,600 15,400 16,700
21 9,940 8,960 5,620 6,600 11,200 14,800 11,500 11,000 9,750 10,000 15,600 16,700
22 10,200 8,790 5,770 6,900 11,600 14,500 11,600 10,500 9,970 9,950 14,400 17,000
23 10,600 8,970 5,760 6,950 12,100 14,700 11,400 10,500 9,540 10,100 14,200 17,000
24 10,800 8,860 5,910 7,030 12,100 14,700 11,300 10,500 9,540 10,400 14,000 15,800
25 11,200 8,570 5,820 7,030 11,900 14,600 11,400 10,300 9,840 10,400 14,200 12,800
26 11,100 8,220 5,780 7,060 12,100 14,700 11,400 9,690 9,490 10,600 14,000 13,200
27 10,700 7,970 5,750 6,990 11,900 14,100 11,100 9,430 9,670 10,600 13,900 13,700
28 10,300 7,490 5,910 7,240 12,000 13,900 11,300 9,620 9,990 10,500 14,100 14,400
29 10,400 7,350 5,860 7,580 12,200 14,000 11,400 9,440 9,870 10,800 14,000 14,000
30 10,300   5,590 7,630 11,900 13,900 11,500 9,640 9,980 10,800 14,800 12,900
31 10,400   5,770   11,900   11,900 9,600   11,300   12,100