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USGS Daily Statistics for South Dakota

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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 06485910 BIG SIOUX RIVER NEAR JEFFERSON, SD


Union County, South Dakota
Hydrologic Unit Code 10170203
Latitude  42°37'35", Longitude  96°30'55" NAD27
Drainage area 8,400  square miles
Contributing drainage area 7,516  square miles
Gage datum 1,069.91 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 2014-10-01 -> 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 1,450 985 1,410 5,990 5,900 6,890 7,140 2,120 1,870 2,680 2,380 1,830
2 1,420 981 1,440 5,970 6,080 6,790 6,300 2,070 1,700 2,700 2,320 1,810
3 1,390 968 1,460 5,650 6,160 6,390 5,550 2,010 1,600 2,590 2,270 1,760
4 1,370 955 1,540 5,440 6,190 5,770 5,250 1,950 1,530 2,610 2,250 1,700
5 1,350 933 1,720 5,250 6,040 5,170 4,940 1,910 1,710 2,820 2,230 1,650
6 1,330 919 1,910 4,900 5,610 4,700 4,590 1,910 1,650 3,030 2,220 1,580
7 1,310 908 2,060 4,540 5,250 4,370 4,520 1,920 1,630 3,270 2,230 1,490
8 1,280 888 2,260 4,330 5,000 4,080 4,880 1,900 1,630 3,380 2,230 1,360
9 1,210 883 2,510 4,440 4,840 3,910 5,050 2,000 1,530 3,410 2,200 1,320
10 1,140 883 2,580 4,900 4,770 3,980 4,790 1,990 1,480 3,780 2,160 1,350
11 1,090 895 2,590 5,310 4,830 3,940 4,320 1,820 1,490 3,820 2,110 1,390
12 1,070 910 2,640 5,390 4,990 3,750 4,040 1,730 1,670 3,850 2,030 1,440
13 1,060 963 3,060 5,380 5,210 3,550 3,980 1,670 1,820 3,900 1,950 1,480
14 1,040 1,100 3,650 5,410 5,180 3,460 3,870 1,700 1,920 3,940 1,910 1,490
15 1,020 1,120 4,490 5,410 5,220 3,610 3,720 1,680 2,180 3,840 1,900 1,510
16 978 1,070 6,890 5,370 5,100 3,550 3,620 1,630 2,990 3,660 1,910 1,520
17 948 1,030 7,630 5,230 4,960 3,700 3,510 1,670 4,250 3,440 1,920 1,480
18 939 1,020 6,970 5,100 4,870 3,700 3,380 1,820 4,700 3,230 1,930 1,420
19 937 1,050 6,210 5,170 4,910 3,790 3,320 1,960 4,590 3,060 1,930 1,410
20 964 1,150 5,880 5,300 4,980 4,000 3,390 2,050 4,310 2,900 1,970 1,430
21 991 1,300 5,630 5,400 4,920 4,300 3,320 2,170 4,140 2,770 2,100 1,480
22 1,020 1,380 5,420 5,410 4,820 4,740 3,130 2,340 4,080 2,660 2,030 1,530
23 1,070 1,470 5,370 5,380 4,780 12,800 3,060 2,390 4,670 2,610 1,990 1,490
24 1,170 1,480 5,350 5,380 4,940 17,000 3,020 2,360 5,250 2,620 1,960 1,410
25 1,190 1,450 5,470 5,450 4,990 14,200 2,920 2,190 5,210 2,620 1,950 1,400
26 1,120 1,430 5,520 5,540 5,090 11,400 2,850 2,070 4,690 2,590 1,930 1,430
27 1,070 1,490 5,460 5,570 5,430 9,620 2,750 1,920 4,020 2,560 1,880 1,460
28 1,040 1,530 5,580 5,510 5,590 8,750 2,630 1,850 3,480 2,500 1,830 1,530
29 1,020 2,620 5,690 5,440 5,910 8,680 2,520 1,790 3,130 2,460 1,810 1,550
30 1,000   5,720 5,500 6,700 8,190 2,320 1,930 2,840 2,440 1,840 1,520
31 993   5,830   6,820   2,180 2,000   2,420   1,480