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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 5 - 6 years 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 9,310 7,120 9,390 21,700 28,200 30,500 14,800 10,300 9,340 7,500 7,880 20,500
2 8,940 6,670 9,460 21,900 28,800 30,800 14,700 10,100 8,830 6,460 8,380 23,200
3 9,960 6,600 9,430 21,900 29,800 31,900 14,200 9,930 8,600 6,010 8,160 25,300
4 10,400 6,760 9,360 21,900 30,600 32,400 13,900 9,920 8,230 5,590 8,570 25,600
5 10,400 7,490 9,460 21,700 31,900 31,200 13,800 9,730 7,880 5,380 9,160 25,200
6 10,300 8,400 10,600 21,200 33,700 30,400 13,600 9,770 7,830 5,380 9,270 24,300
7 9,640 9,660 11,600 21,300 34,300 29,800 13,400 9,630 7,850 5,350 9,890 23,300
8 8,480 11,000 12,800 22,100 33,500 29,100 13,300 9,730 7,750 5,250 10,700 24,100
9 7,590 11,500 13,900 23,600 32,600 28,600 13,100 9,750 7,880 5,240 12,200 25,500
10 7,270 11,000 15,500 24,800 32,200 27,300 12,800 9,590 7,720 5,390 12,700 28,200
11 7,500 10,400 14,200 25,200 31,000 25,700 12,800 9,540 7,820 5,320 13,200 26,200
12 8,310 9,940 13,400 25,600 30,400 24,600 12,800 9,580 7,840 5,310 16,100 24,700
13 9,040 10,400 14,000 26,800 30,500 23,700 12,600 9,550 7,650 5,270 17,600 23,000
14 9,170 11,400 14,500 26,800 30,500 22,700 12,300 9,490 7,660 5,630 18,500 21,900
15 8,220 11,700 16,500 26,200 30,600 21,500 12,400 9,520 7,780 6,030 19,400 22,500
16 7,040 11,900 20,900 26,700 32,900 21,000 12,100 9,510 7,700 5,910 18,800 22,400
17 7,540 11,900 23,400 27,200 36,200 20,400 12,000 9,460 7,710 6,370 18,100 22,200
18 9,570 10,700 22,500 27,100 37,100 20,400 11,900 9,370 7,750 6,170 19,800 22,000
19 9,970 10,600 23,600 26,500 36,400 19,600 11,900 9,440 7,760 6,110 20,600 22,900
20 10,200 11,800 23,900 26,400 35,400 19,000 11,700 9,510 7,620 6,090 20,800 22,500
21 9,100 11,900 20,500 26,600 35,300 18,500 11,400 9,480 7,590 6,370 20,400 20,900
22 8,740 11,600 20,200 27,700 35,800 18,300 11,400 9,380 7,710 6,320 19,900 20,500
23 8,730 10,700 22,400 28,300 39,200 17,700 11,200 9,400 7,650 6,280 19,000 21,600
24 9,840 9,640 22,500 27,800 40,900 17,500 11,100 9,400 7,450 6,120 19,700 22,400
25 10,200 8,890 23,000 28,000 39,400 17,200 10,900 9,310 7,470 6,110 20,700 22,200
26 10,300 8,670 22,800 28,200 37,600 17,100 10,800 9,330 7,560 6,040 21,700 19,800
27 10,000 9,250 22,500 28,800 36,100 16,500 10,600 9,410 7,510 6,380 20,700 20,400
28 8,430 9,430 22,400 29,400 34,500 16,000 10,600 9,280 7,400 6,880 19,000 20,100
29 8,300 8,130 22,200 29,200 34,000 15,800 10,500 9,390 7,320 6,780 19,200 18,400
30 8,480   21,700 28,700 32,400 15,500 10,500 9,330 7,030 6,550 19,700 14,200
31 7,970   20,700   30,700   10,300 9,400   6,750   10,900