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USGS Daily Statistics for Wyoming

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Questions or concerns about USGS data and data products in Wyoming and Montana can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 06287000 Bighorn R bl Yellowtail Afterbay Dam nr St. Xavier


Big Horn County, Montana
Hydrologic Unit Code 10080015
Latitude  45°19'00.85", Longitude 107°55'08.00" NAD83
Drainage area 19,670  square miles
Gage datum 3,100 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 1934-10-01 -> 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 2,610 2,520 2,710 2,940 3,300 5,490 7,030 3,370 2,580 2,850 2,870 2,730
2 2,600 2,520 2,730 2,920 3,350 5,660 6,820 3,220 2,580 2,900 2,910 2,750
3 2,610 2,540 2,750 2,920 3,300 5,800 6,830 3,210 2,590 2,860 2,890 2,760
4 2,600 2,550 2,740 2,920 3,290 5,900 6,760 3,190 2,580 2,930 2,890 2,760
5 2,590 2,570 2,740 2,900 3,330 6,000 6,680 3,140 2,570 2,960 2,890 2,690
6 2,600 2,590 2,790 2,890 3,310 6,020 6,640 3,100 2,560 2,910 2,870 2,670
7 2,620 2,600 2,800 2,960 3,280 6,080 6,480 3,040 2,580 2,890 2,850 2,670
8 2,620 2,590 2,830 2,960 3,300 6,150 6,380 2,980 2,690 2,860 2,840 2,670
9 2,600 2,570 2,850 2,990 3,300 6,350 6,300 2,910 2,630 2,870 2,830 2,690
10 2,620 2,570 2,850 3,010 3,320 6,460 6,210 2,890 2,620 2,850 2,790 2,690
11 2,620 2,560 2,830 3,010 3,350 6,590 6,140 2,900 2,650 2,930 2,760 2,670
12 2,620 2,570 2,850 2,990 3,440 6,640 6,030 2,890 2,670 2,930 2,780 2,660
13 2,620 2,580 2,870 2,970 3,530 6,840 5,920 2,930 2,660 2,910 2,780 2,660
14 2,600 2,670 2,880 2,970 3,630 6,990 5,810 2,900 2,660 2,880 2,850 2,650
15 2,590 2,690 2,890 2,970 3,670 6,950 5,630 2,850 2,640 2,820 2,830 2,640
16 2,580 2,620 2,910 3,000 3,730 7,080 5,400 2,760 2,620 2,750 2,830 2,620
17 2,550 2,580 2,950 3,050 3,780 7,230 5,180 2,740 2,640 2,760 2,810 2,630
18 2,540 2,600 2,950 3,050 3,820 7,390 5,000 2,700 2,670 2,770 2,800 2,630
19 2,520 2,650 2,960 3,080 3,970 7,340 4,830 2,660 2,670 2,760 2,840 2,620
20 2,520 2,670 3,000 3,080 4,110 7,230 4,720 2,670 2,750 2,800 2,860 2,620
21 2,520 2,670 3,020 3,080 4,170 7,340 4,610 2,750 2,790 2,850 2,870 2,650
22 2,510 2,690 2,990 3,110 4,220 7,450 4,460 2,720 2,820 2,930 2,830 2,660
23 2,500 2,680 2,970 3,140 4,240 7,550 4,400 2,680 2,830 2,910 2,790 2,680
24 2,500 2,680 2,980 3,160 4,210 7,590 4,260 2,680 2,780 2,900 2,740 2,680
25 2,520 2,680 2,990 3,130 4,330 7,710 4,080 2,650 2,770 2,930 2,750 2,670
26 2,520 2,680 3,010 3,150 4,480 7,660 4,050 2,620 2,790 2,880 2,760 2,660
27 2,500 2,680 3,020 3,200 4,630 7,690 3,930 2,610 2,780 2,870 2,750 2,640
28 2,510 2,690 3,000 3,230 4,770 7,640 3,850 2,620 2,770 2,870 2,740 2,620
29 2,520 2,790 2,980 3,220 4,920 7,350 3,660 2,640 2,790 2,860 2,730 2,600
30 2,500   2,950 3,300 5,070 7,110 3,540 2,650 2,800 2,860 2,710 2,620
31 2,510   2,940   5,280   3,470 2,610   2,850   2,620