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USGS Daily Statistics for Idaho

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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 12322000 KOOTENAI RIVER AT PORTHILL ID


Boundary County, Idaho
Hydrologic Unit Code 17010104
Latitude  48°59'47", Longitude 116°30'27" NAD83
Drainage area 13,700  square miles
Gage datum 1,700 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 2013-10-01 -> 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 9,850 7,960 7,900 15,100 23,500 31,100 15,500 10,200 9,000 7,300 7,540 17,300
2 9,610 7,710 8,080 15,100 25,200 30,300 15,300 10,000 8,530 6,450 8,040 19,100
3 9,950 7,570 8,280 15,000 26,500 30,300 15,000 9,850 8,390 6,020 7,780 20,800
4 9,810 7,520 8,300 15,100 27,000 30,600 14,800 9,660 8,290 5,580 7,760 21,200
5 9,710 7,810 8,480 15,000 27,900 29,800 14,600 9,700 8,190 5,330 7,780 21,500
6 9,620 8,350 9,340 14,800 29,600 29,200 14,400 9,670 8,160 5,300 7,960 21,600
7 9,280 9,430 9,770 14,800 30,600 28,700 14,000 9,590 8,150 5,240 8,130 21,200
8 8,680 10,900 10,300 15,300 29,900 27,900 14,000 9,700 8,090 5,080 9,000 20,900
9 8,250 11,300 10,800 16,100 28,800 27,000 13,900 9,720 8,060 5,090 10,300 21,200
10 8,040 10,900 11,500 16,900 28,000 26,300 13,700 9,680 8,050 5,120 11,900 22,900
11 8,130 10,600 10,900 17,600 27,100 25,600 13,600 9,620 8,070 5,100 12,400 22,400
12 8,570 10,400 10,400 18,100 26,900 25,000 13,200 9,520 8,090 5,080 13,500 22,300
13 9,040 10,600 10,600 18,400 27,300 24,600 13,000 9,460 7,990 5,030 14,400 21,900
14 9,360 11,100 10,700 18,200 28,000 24,100 12,800 9,500 7,980 5,230 15,100 21,400
15 8,790 11,800 11,600 17,700 29,500 23,400 12,800 9,510 7,860 5,470 16,200 20,800
16 8,240 12,000 13,800 17,800 31,600 22,600 12,600 9,420 7,820 5,410 16,100 20,300
17 9,200 11,900 15,100 18,000 35,000 21,700 12,400 9,540 7,760 5,500 15,300 20,800
18 10,600 11,300 14,600 18,100 36,200 21,500 12,000 9,470 7,810 5,390 15,900 21,500
19 10,800 11,100 15,200 17,900 35,800 20,800 11,800 9,200 7,850 5,330 16,600 22,100
20 10,900 11,100 15,400 18,200 34,600 20,300 11,500 9,130 7,820 5,330 16,700 21,700
21 9,990 11,200 13,700 18,500 34,500 19,700 11,100 9,130 7,790 5,470 16,500 21,100
22 9,310 11,600 13,600 19,200 34,800 19,000 11,100 9,100 7,830 5,430 15,600 21,200
23 9,320 11,200 14,700 19,900 35,900 18,200 10,900 9,130 7,720 5,500 15,000 21,100
24 10,600 10,700 14,800 20,100 36,400 17,700 10,900 9,140 7,570 5,390 15,400 21,300
25 11,000 10,500 15,200 20,500 35,800 17,300 10,700 9,010 7,610 5,380 15,900 20,400
26 11,700 10,300 15,200 20,800 34,700 17,000 10,500 9,040 7,620 5,350 16,500 17,800
27 11,700 9,570 15,100 21,400 34,200 16,500 10,300 9,000 7,550 5,530 17,000 18,100
28 10,100 8,620 15,100 22,100 33,700 16,200 10,400 8,960 7,480 5,960 16,900 18,100
29 9,290 8,770 15,200 22,400 33,200 16,100 10,300 9,000 7,430 7,070 17,000 17,000
30 8,890   15,100 22,800 32,200 15,800 10,300 9,050 7,130 7,360 16,700 13,500
31 8,450   14,700   31,500   10,200 9,020   7,170   11,100