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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 -> 2019-09-30)

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 8,720 6,770 8,670 19,300 26,200 30,500 14,800 10,300 9,340 7,500 7,410 19,600
2 8,290 6,400 8,730 19,500 26,700 30,800 14,700 10,100 8,830 6,460 7,850 21,200
3 9,150 6,410 8,670 19,400 27,300 31,900 14,200 9,930 8,600 6,010 7,780 22,800
4 9,510 6,470 8,580 19,500 27,900 32,400 13,900 9,920 8,230 5,590 8,100 23,900
5 9,500 7,100 8,960 19,400 29,000 31,200 13,800 9,730 7,880 5,380 8,580 24,700
6 9,450 7,870 10,600 19,100 30,600 30,400 13,600 9,770 7,830 5,380 8,630 24,200
7 8,910 8,910 11,500 19,200 31,300 29,800 13,400 9,630 7,850 5,350 9,100 23,200
8 7,920 10,100 12,500 20,000 30,900 29,100 13,300 9,730 7,750 5,250 9,780 23,200
9 7,190 10,400 13,400 21,200 30,200 28,600 13,100 9,750 7,880 5,240 11,000 23,900
10 6,890 10,000 14,700 22,500 30,000 27,300 12,800 9,590 7,720 5,390 11,400 26,400
11 7,100 9,450 13,700 23,000 29,300 25,700 12,800 9,540 7,820 5,320 11,800 25,800
12 7,770 9,070 12,900 23,300 29,400 24,600 12,800 9,580 7,840 5,310 14,400 24,600
13 8,370 9,450 13,100 24,200 30,100 23,700 12,600 9,550 7,650 5,270 16,600 23,200
14 8,490 10,300 13,300 24,100 30,600 22,700 12,300 9,490 7,660 5,630 18,500 22,100
15 7,680 10,500 14,700 23,600 31,100 21,500 12,400 9,520 7,780 6,030 19,400 21,400
16 6,670 10,700 18,300 23,900 33,000 21,000 12,100 9,510 7,700 5,910 18,900 20,600
17 7,100 10,700 20,300 24,200 36,200 20,400 12,000 9,460 7,710 6,050 18,200 20,600
18 8,790 9,730 19,600 24,100 37,100 20,400 11,900 9,370 7,750 5,890 18,500 22,200
19 9,130 9,660 20,500 23,600 36,400 19,600 11,900 9,440 7,760 5,840 19,000 23,200
20 9,300 10,700 20,800 24,000 35,400 19,000 11,700 9,510 7,620 5,810 19,600 22,900
21 8,440 10,700 18,000 24,600 35,300 18,500 11,400 9,480 7,590 6,050 18,700 21,500
22 8,110 10,500 17,800 25,500 35,800 18,300 11,400 9,380 7,710 6,010 17,700 21,000
23 8,110 9,770 19,600 26,300 39,200 17,700 11,200 9,400 7,650 5,990 16,800 20,600
24 9,050 8,880 19,800 26,400 40,900 17,500 11,100 9,400 7,450 5,880 17,400 20,600
25 9,300 8,230 20,200 26,800 39,400 17,200 10,900 9,310 7,470 5,850 18,200 20,300
26 9,380 8,050 20,100 26,900 37,600 17,100 10,800 9,330 7,560 5,790 19,200 18,300
27 9,200 8,530 20,000 27,200 36,100 16,500 10,600 9,410 7,510 6,140 19,600 18,800
28 7,860 8,700 19,800 27,700 34,500 16,000 10,600 9,280 7,400 6,570 19,000 18,300
29 7,750 8,130 19,700 27,400 34,000 15,800 10,500 9,390 7,320 6,510 19,300 16,500
30 7,870   19,300 26,800 32,400 15,500 10,500 9,330 7,030 6,320 19,600 12,900
31 7,450   18,400   30,700   10,300 9,400   6,470   10,100