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USGS Daily Statistics for Arkansas

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 07072500 Black River at Black Rock, AR


Lawrence County, Arkansas
Hydrologic Unit Code 11010009
Latitude  36°06'09", Longitude  91°05'52" NAD83
Drainage area 7,370  square miles
Gage datum 229.48 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 1947-10-01 -> 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 11,500 11,400 12,300 17,400 18,200 11,300 6,250 4,800 4,060 4,330 5,510 8,500
2 12,200 11,500 12,400 16,800 18,400 11,000 6,220 4,780 4,120 4,220 5,410 8,480
3 12,300 11,300 12,500 16,400 19,000 10,700 6,130 4,690 4,190 4,150 5,370 8,500
4 12,300 11,200 13,000 17,000 18,500 10,400 6,230 4,560 4,110 4,070 5,370 9,300
5 12,500 11,000 12,900 17,800 17,900 10,000 6,160 4,510 4,040 3,990 5,610 10,100
6 12,300 10,800 12,500 18,300 17,700 9,810 6,200 4,480 3,960 4,070 5,970 9,540
7 11,600 10,600 12,300 16,800 17,500 9,670 6,140 4,440 3,880 4,060 6,260 9,240
8 11,000 10,400 12,400 16,100 17,600 9,350 6,130 4,420 3,820 3,950 6,240 9,010
9 10,800 10,300 12,900 15,800 17,100 9,030 6,120 4,380 3,810 4,010 6,050 8,860
10 10,700 10,300 13,800 15,400 16,700 9,000 6,010 4,470 3,800 4,180 5,840 8,700
11 10,700 10,400 14,000 15,500 16,700 8,830 5,920 4,450 3,890 4,140 5,700 8,710
12 10,600 10,700 14,100 15,300 16,400 8,680 5,880 4,400 3,990 4,050 5,520 8,730
13 10,600 11,000 13,800 15,200 16,300 8,560 5,850 4,380 3,910 3,980 5,500 8,430
14 11,000 11,600 14,000 15,200 16,200 8,400 5,780 4,410 3,820 4,010 5,630 8,380
15 10,800 12,300 14,100 15,400 15,900 8,180 5,630 4,560 3,740 3,970 5,740 8,530
16 10,600 12,400 13,900 15,100 15,400 8,030 5,490 4,790 3,810 3,950 6,060 8,730
17 10,400 12,300 13,800 14,600 15,100 7,810 5,410 4,750 3,940 4,000 6,370 8,780
18 10,200 12,200 14,000 14,300 14,700 7,630 5,270 4,670 3,990 3,950 7,040 8,860
19 10,000 11,900 14,800 14,500 14,400 7,540 5,220 4,790 3,920 3,910 7,490 8,710
20 9,840 11,900 15,400 14,700 14,000 7,310 5,200 4,790 3,890 3,860 7,510 8,580
21 9,870 12,100 15,400 14,900 13,800 7,130 5,090 4,730 3,950 3,910 7,430 8,660
22 9,920 12,400 15,300 14,900 13,700 6,950 5,030 4,590 3,970 3,930 7,220 9,610
23 10,100 12,600 15,100 15,400 13,600 6,830 4,990 4,460 4,210 4,010 7,340 9,570
24 10,400 12,600 15,100 16,000 13,500 6,860 4,980 4,380 4,530 4,160 7,740 9,360
25 11,100 12,800 15,200 16,400 13,000 6,940 4,890 4,300 4,510 4,140 8,050 10,100
26 11,000 12,700 15,400 17,500 12,700 6,710 4,790 4,190 4,610 4,080 8,190 10,000
27 10,800 12,600 15,300 17,400 13,000 6,530 4,750 4,130 4,570 4,080 8,400 10,100
28 10,700 12,600 16,000 17,300 13,200 6,430 4,700 4,150 4,520 4,230 8,840 10,600
29 10,500 8,860 16,800 17,400 12,600 6,360 4,680 4,120 4,430 4,320 8,680 11,200
30 10,800   16,400 17,300 12,000 6,300 4,790 4,170 4,410 4,720 8,490 11,000
31 11,300   17,100   11,700   4,850 4,110   5,380   10,900