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USGS Daily Statistics for Kansas

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Historic (pre-2007) gage-height data may contain erroneous values, such as pressure sensors encased in ice, even if they are flagged as approved. These data are made available to the public, but data users are cautioned to carefully screen the data and contact the USGS Kansas Water Science Center if they have questions or concerns about specific values.

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 06887000 BIG BLUE R NR MANHATTAN, KS


Riley County, Kansas
Hydrologic Unit Code 10270205
Latitude  39°14'14", Longitude  96°34'16" NAD27
Drainage area 9,640  square miles
Contributing drainage area 9,640  square miles
Gage datum 989.25 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 1950-10-01 -> 2025-09-30)

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
1 996 1,150 1,960 2,980 2,510 4,280 4,610 2,620 1,540 1,250 1,460 1,500
2 992 1,190 1,960 3,010 2,580 4,280 4,350 2,570 1,530 1,530 1,340 1,410
3 1,010 1,290 1,950 3,000 2,500 4,670 4,050 2,540 1,720 1,930 1,290 1,410
4 1,020 1,380 1,990 3,060 2,390 4,830 3,960 2,460 1,990 2,010 1,250 1,470
5 1,000 1,400 1,900 3,190 2,640 4,990 4,230 2,530 2,160 1,810 1,190 1,500
6 984 1,340 1,850 3,150 2,670 4,990 4,190 2,730 2,190 1,460 1,260 1,530
7 956 1,350 1,710 3,240 2,650 4,870 4,070 2,770 2,040 1,420 1,320 1,550
8 939 1,350 1,630 3,310 2,690 4,750 4,110 2,910 2,020 1,590 1,340 1,590
9 809 1,370 1,820 3,140 3,040 4,650 3,990 2,970 1,940 1,580 1,370 1,600
10 727 1,400 1,780 3,020 2,990 4,300 4,030 2,840 1,910 1,600 1,410 1,580
11 719 1,340 1,660 2,960 3,250 4,150 4,580 2,490 1,910 1,460 1,430 1,540
12 723 1,210 1,470 2,750 3,270 4,150 5,010 2,370 1,940 1,450 1,470 1,520
13 770 1,110 1,410 2,960 3,180 4,270 5,110 2,450 2,150 1,440 1,500 1,520
14 762 1,150 1,430 3,040 3,250 4,380 4,820 2,430 2,360 1,450 1,500 1,530
15 735 1,150 1,390 2,800 3,380 4,420 4,620 2,440 2,190 1,410 1,510 1,530
16 763 1,170 1,520 2,410 3,490 4,420 4,380 2,510 2,180 1,380 1,590 1,550
17 723 1,200 1,650 2,280 3,550 4,780 4,140 2,430 2,020 1,370 1,630 1,570
18 704 1,210 1,740 2,150 3,550 4,370 4,000 2,270 1,990 1,550 1,620 1,530
19 721 1,280 1,780 2,070 3,550 4,610 4,240 2,130 1,950 1,600 1,650 1,420
20 735 1,340 1,940 2,080 3,490 4,560 3,920 2,030 1,900 1,560 1,710 1,330
21 769 1,240 2,040 2,170 3,210 4,510 3,590 1,950 1,640 1,590 1,820 1,280
22 783 1,240 2,150 2,310 3,120 4,670 3,530 1,880 1,440 1,630 1,880 1,300
23 785 1,390 2,250 2,220 3,420 4,650 3,590 1,830 1,440 1,650 1,890 1,260
24 880 1,460 2,380 2,120 3,470 4,370 3,420 1,740 1,440 1,740 1,830 1,180
25 956 1,450 2,640 1,970 3,420 4,110 3,440 1,920 1,380 1,860 1,810 1,160
26 988 1,440 2,870 2,140 3,340 4,220 3,620 1,890 1,370 1,830 1,780 1,160
27 1,020 1,640 2,930 2,450 3,460 4,640 3,410 1,580 1,360 1,800 1,590 1,100
28 1,050 1,800 2,960 2,370 3,550 4,860 3,180 1,480 1,230 1,770 1,560 941
29 1,100 1,290 2,950 2,290 3,660 5,060 3,150 1,440 1,170 1,770 1,540 905
30 1,130   3,070 2,200 3,950 4,970 2,920 1,480 1,120 1,750 1,540 879
31 1,120   3,040   4,490   2,630 1,520   1,650   910