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USGS Daily Statistics for the Nation

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 46 - 47 years of record in, ft3/s   (Calculation Period 1971-10-01 -> 2018-09-30)

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 11,000 10,600 7,680 5,950 7,610 11,800 14,000 12,200 9,440 9,590 12,200 16,300
2 11,500 11,000 7,840 6,070 7,890 12,500 14,300 12,200 8,830 9,700 12,700 16,600
3 12,000 10,800 8,120 6,000 7,870 12,900 14,500 11,900 8,950 9,940 13,000 15,800
4 12,000 9,890 7,670 6,110 7,850 13,100 14,100 11,800 9,050 10,400 13,200 16,100
5 12,600 9,720 7,150 6,200 7,820 13,000 13,800 11,500 8,960 10,500 12,600 16,900
6 12,400 9,710 6,880 6,250 7,820 13,100 13,300 11,600 8,690 10,100 12,500 16,700
7 12,400 10,500 6,940 6,290 7,480 13,300 13,100 11,500 8,520 10,100 12,300 17,100
8 12,300 10,900 7,140 6,570 7,390 13,700 12,500 11,700 8,920 10,200 12,900 17,600
9 12,600 10,200 7,200 6,470 7,280 14,100 12,300 11,800 9,640 10,200 13,500 17,400
10 12,300 9,550 7,040 6,530 7,480 14,100 12,500 11,500 9,810 10,600 14,100 16,000
11 12,400 9,780 6,270 6,880 7,460 14,900 12,500 11,500 9,320 10,800 14,100 16,400
12 12,800 9,010 5,740 7,290 7,400 15,200 12,200 10,900 9,010 11,000 13,900 16,900
13 13,200 9,040 5,710 7,340 7,460 15,100 11,600 10,800 9,220 11,100 13,600 17,100
14 13,100 9,440 5,900 6,970 7,560 15,100 11,600 10,900 9,520 11,200 13,800 17,300
15 12,300 9,510 6,060 7,080 8,040 15,500 11,900 10,800 9,830 11,200 14,500 17,300
16 11,700 9,440 6,000 7,040 8,780 15,700 12,100 10,800 9,490 11,400 14,600 16,900
17 11,200 8,860 6,000 7,070 9,480 15,200 12,400 11,200 9,650 11,700 15,500 16,400
18 10,800 8,620 5,800 7,080 9,540 15,200 12,200 11,100 9,900 11,500 15,500 16,300
19 10,300 8,290 5,650 6,990 9,690 15,100 11,800 10,800 9,480 11,800 16,000 16,700
20 10,100 8,610 5,400 6,810 9,760 14,900 11,600 11,100 9,840 11,400 15,800 16,400
21 10,100 8,620 5,580 6,870 10,200 14,800 11,800 11,300 10,100 10,800 16,200 16,200
22 10,400 8,470 5,660 7,160 10,600 14,600 11,900 10,700 10,300 10,700 15,000 16,700
23 10,600 8,770 5,640 7,180 11,100 14,800 11,700 10,800 9,850 10,900 14,600 16,700
24 10,700 8,680 5,900 7,180 11,100 14,800 11,500 10,700 9,850 11,200 14,300 15,300
25 10,900 8,370 5,810 7,180 11,000 14,800 11,700 10,500 10,200 11,200 14,600 12,400
26 10,900 8,130 5,760 7,150 11,200 14,900 11,600 9,860 9,810 11,500 14,200 12,800
27 10,800 8,080 5,720 7,030 11,000 14,300 11,400 9,580 10,000 11,400 13,900 13,300
28 10,500 7,650 5,900 7,230 11,100 14,100 11,600 9,780 10,400 11,100 13,900 14,300
29 10,700 7,530 5,890 7,530 11,300 14,200 11,700 9,590 10,300 11,400 13,800 14,100
30 10,600   5,670 7,580 11,000 14,000 11,800 9,810 10,400 11,400 14,700 13,200
31 10,800   5,910   11,100   12,200 9,760   11,900   12,500