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USGS Surface-Water 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 12305000 KOOTENAI RIVER AT LEONIA, ID


Boundary County, Idaho
Hydrologic Unit Code 17010104
Latitude  48°37'00.78", Longitude 116°02'57.10" NAD83
Drainage area 11,740  square miles
Gage datum 1,794.75 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 1971-10-01 -> 2024-09-30)

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 12,400 11,400 9,130 9,740 15,200 20,500 16,800 12,600 10,100 10,200 12,500 17,300
2 11,900 11,600 9,280 9,770 15,500 20,900 16,900 12,800 9,630 9,960 13,200 18,100
3 12,400 11,600 9,480 9,890 15,800 21,200 17,000 12,600 9,400 9,900 13,400 17,600
4 12,400 11,100 9,440 9,880 15,800 21,300 16,600 12,400 9,550 10,300 13,700 18,300
5 12,900 10,500 9,130 10,200 15,900 21,100 16,200 12,100 9,500 10,400 13,500 18,800
6 12,900 10,900 8,900 10,500 16,300 20,800 15,500 11,900 9,400 10,200 13,000 18,800
7 12,900 11,400 8,880 10,800 16,400 20,700 15,300 12,100 9,220 10,000 13,200 18,300
8 13,200 12,200 9,010 10,900 16,100 20,700 14,700 12,100 9,110 9,950 14,000 18,800
9 13,200 12,500 9,190 11,100 16,000 20,700 14,500 12,300 9,770 10,100 14,200 19,000
10 13,300 11,500 9,360 11,200 16,000 20,500 14,300 12,000 10,200 10,300 15,100 18,200
11 13,100 11,200 8,870 11,400 16,100 20,900 14,400 11,900 9,940 10,700 15,000 17,900
12 13,300 10,900 8,510 11,900 16,000 21,100 14,100 11,500 9,520 10,900 15,300 18,500
13 13,700 10,500 8,480 12,300 16,400 21,300 13,600 11,200 9,500 11,100 14,900 18,700
14 13,900 10,900 8,530 12,300 16,900 21,200 13,400 11,200 9,720 11,200 14,600 18,900
15 13,400 11,400 8,880 12,300 17,900 21,300 13,500 11,300 10,100 11,200 15,400 18,700
16 13,700 11,100 9,350 12,100 19,300 21,300 13,500 11,400 10,000 11,200 15,400 18,200
17 13,400 10,900 9,350 12,100 20,400 21,000 13,800 11,400 9,910 11,500 15,900 18,100
18 12,800 10,500 9,190 12,300 20,700 20,600 13,500 11,600 10,300 11,500 16,300 17,900
19 12,300 10,100 9,140 12,300 20,600 20,100 13,200 11,100 10,000 11,700 16,600 18,000
20 11,800 10,500 8,790 12,500 20,300 19,800 12,900 11,200 10,100 11,600 16,800 17,900
21 11,600 10,900 8,740 12,800 20,400 19,500 12,800 11,500 10,300 11,100 16,700 17,700
22 11,600 10,700 8,910 13,200 21,000 19,100 12,700 11,300 10,700 10,800 16,100 17,800
23 11,900 10,700 8,940 13,600 21,400 18,800 12,800 11,100 10,300 10,800 15,800 18,100
24 12,200 10,600 9,090 14,200 21,400 18,700 12,500 11,100 10,200 11,200 15,700 17,300
25 12,400 10,400 9,420 14,400 21,100 18,200 12,500 11,000 10,400 11,400 16,200 15,100
26 12,400 10,000 9,160 14,200 21,000 18,300 12,500 10,600 10,200 11,500 15,700 14,300
27 12,200 9,690 9,160 14,200 20,900 17,900 12,500 10,100 10,300 11,400 15,300 15,000
28 11,700 9,300 9,150 14,500 20,700 17,300 12,400 10,100 10,400 11,500 15,400 15,500
29 11,600 9,360 9,390 14,700 20,600 17,300 12,300 10,100 10,600 11,800 15,700 15,500
30 11,600   9,240 14,900 20,500 17,000 12,400 10,100 10,700 11,900 16,000 14,500
31 11,400   9,520   20,400   12,800 10,400   12,100   13,500