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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 11,400 11,200 12,300 17,500 18,200 11,200 6,100 4,800 4,060 4,330 5,540 8,510
2 12,100 11,300 12,400 16,900 18,300 10,900 6,090 4,780 4,120 4,220 5,440 8,490
3 12,200 11,100 12,600 16,500 18,900 10,600 6,010 4,690 4,190 4,150 5,400 8,510
4 12,200 11,000 13,000 17,000 18,500 10,300 6,140 4,560 4,110 4,070 5,390 9,330
5 12,400 10,900 12,900 17,300 17,900 9,950 6,090 4,510 4,040 3,990 5,490 10,200
6 12,200 10,700 12,500 16,800 17,700 9,710 6,150 4,480 3,960 4,070 5,710 9,570
7 11,500 10,600 12,400 15,900 17,500 9,570 6,090 4,440 3,880 4,060 6,020 9,270
8 10,900 10,400 12,400 15,300 17,600 9,240 6,090 4,420 3,820 3,950 6,050 9,030
9 10,700 10,300 12,900 15,000 17,100 8,900 6,080 4,380 3,810 4,010 5,860 8,880
10 10,600 10,300 13,800 14,700 16,700 8,870 5,970 4,470 3,800 4,180 5,640 8,720
11 10,600 10,300 14,100 14,900 16,700 8,700 5,870 4,450 3,890 4,140 5,500 8,730
12 10,500 10,600 14,200 14,800 16,400 8,560 5,830 4,400 3,990 4,050 5,330 8,760
13 10,500 10,900 13,800 14,700 16,300 8,450 5,810 4,380 3,910 3,980 5,330 8,460
14 11,000 11,500 14,100 14,800 16,200 8,290 5,740 4,410 3,820 4,010 5,490 8,410
15 10,800 12,200 14,200 15,100 15,900 8,090 5,590 4,560 3,740 3,970 5,630 8,560
16 10,600 12,200 13,900 14,900 15,400 7,860 5,440 4,790 3,810 3,950 5,990 8,750
17 10,400 12,100 13,900 14,500 15,100 7,590 5,360 4,750 3,940 4,000 6,330 8,760
18 10,200 12,100 14,100 14,100 14,800 7,410 5,220 4,670 3,990 3,950 7,020 8,780
19 10,000 11,800 14,800 14,300 14,400 7,350 5,170 4,790 3,920 3,910 7,480 8,580
20 9,840 11,800 15,500 14,600 14,000 7,130 5,160 4,790 3,890 3,860 7,490 8,460
21 9,870 12,000 15,500 14,900 13,800 6,970 5,050 4,730 3,950 3,910 7,410 8,540
22 9,930 12,300 15,400 14,800 13,700 6,800 4,990 4,590 3,970 3,930 7,200 9,520
23 10,100 12,500 15,200 15,300 13,600 6,690 4,950 4,460 4,210 4,010 7,330 9,500
24 10,400 12,500 15,200 15,900 13,400 6,730 4,950 4,380 4,530 4,160 7,730 9,300
25 11,100 12,700 15,300 16,300 12,900 6,830 4,870 4,300 4,510 4,140 8,050 10,000
26 11,000 12,700 15,500 17,400 12,500 6,610 4,760 4,190 4,610 4,080 8,190 9,940
27 10,800 12,600 15,500 17,300 12,800 6,430 4,730 4,130 4,570 4,080 8,410 9,980
28 10,700 12,600 16,100 17,200 13,100 6,330 4,670 4,150 4,520 4,230 8,850 10,500
29 10,600 8,860 17,000 17,300 12,500 6,240 4,680 4,120 4,430 4,340 8,690 11,100
30 10,700   16,500 17,300 11,900 6,180 4,790 4,170 4,410 4,740 8,500 10,800
31 11,100   17,300   11,600   4,850 4,110   5,410   10,800