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USGS Daily Statistics for the Nation

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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 -> 2026-09-30)

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 9,860 7,710 7,810 14,400 22,300 30,700 14,600 10,100 8,770 7,260 7,480 16,700
2 9,120 7,510 7,950 14,300 24,000 29,700 14,500 9,930 8,390 6,570 7,940 18,100
3 9,270 7,410 8,070 14,200 25,200 29,400 14,300 9,820 8,270 6,130 7,700 19,600
4 9,120 7,420 8,080 14,300 25,700 29,700 14,200 9,570 8,180 5,660 7,680 20,000
5 9,020 7,630 8,210 14,300 26,400 28,800 14,000 9,630 8,040 5,460 7,900 20,200
6 8,930 8,070 8,940 14,100 27,700 28,000 13,800 9,540 8,040 5,350 8,380 20,500
7 8,650 9,040 9,270 14,100 28,400 27,500 13,500 9,510 8,020 5,300 8,590 20,300
8 8,140 10,300 9,680 14,500 27,900 26,700 13,500 9,550 7,970 5,140 9,400 20,000
9 7,790 10,600 10,100 15,200 27,000 25,900 13,300 9,460 7,920 5,170 10,500 20,300
10 7,620 10,300 10,700 16,000 26,400 25,200 13,200 9,410 7,940 5,210 11,800 22,500
11 7,770 10,100 10,200 16,500 25,800 24,500 13,200 9,380 7,930 5,160 12,200 22,300
12 8,450 9,850 9,860 16,900 25,900 24,000 12,800 9,280 8,010 5,130 13,500 22,300
13 8,880 9,980 10,000 17,200 26,500 23,600 12,700 9,190 7,930 5,150 14,400 22,000
14 9,160 10,300 10,100 17,000 27,300 23,100 12,500 9,290 7,860 5,280 15,000 21,500
15 8,700 10,900 10,900 16,700 28,800 22,400 12,500 9,280 7,760 5,490 16,000 21,000
16 8,100 11,000 12,700 16,900 30,600 21,500 12,400 9,170 7,790 5,430 15,900 20,300
17 8,640 10,900 13,800 17,100 33,600 20,600 12,100 9,280 7,760 5,530 14,900 20,900
18 9,690 10,400 13,400 17,100 34,800 20,300 11,800 9,200 7,730 5,440 15,500 21,600
19 10,000 10,200 13,900 17,000 34,200 19,700 11,600 8,970 7,750 5,380 16,600 22,200
20 10,100 10,200 14,200 17,200 33,000 19,100 11,400 8,920 7,760 5,400 16,800 21,900
21 9,320 10,300 12,900 17,500 32,700 18,500 11,100 8,940 7,740 5,490 16,600 21,300
22 8,770 10,600 12,900 18,100 33,000 17,900 11,100 8,890 7,790 5,360 15,800 21,300
23 8,750 10,300 13,800 18,600 33,900 17,200 10,900 8,950 7,660 5,400 15,300 21,000
24 9,690 9,970 13,900 18,700 34,300 16,800 10,900 8,910 7,570 5,290 15,400 21,500
25 10,100 9,820 14,300 19,000 33,900 16,400 10,700 8,830 7,550 5,280 15,500 20,700
26 10,600 9,910 14,500 19,400 33,000 16,100 10,400 8,850 7,590 5,240 16,300 18,300
27 10,600 9,250 14,500 20,100 32,600 15,600 10,200 8,790 7,500 5,470 16,700 18,600
28 9,320 8,370 14,700 20,800 32,500 15,300 10,300 8,770 7,460 5,870 16,600 18,600
29 8,730 8,430 14,800 21,200 32,600 15,200 10,200 8,830 7,380 7,040 16,500 17,200
30 8,460   14,600 21,700 31,900 15,000 10,200 8,850 7,190 7,310 16,100 13,600
31 8,120   14,100   31,200   10,100 8,780   7,130   11,100