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USGS Daily Statistics for Missouri

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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 07018500 Big River at Byrnesville, MO


Jefferson County, Missouri
Hydrologic Unit Code 07140104
Latitude  38°23'30.2", Longitude  90°38'16.1" NAD83
Drainage area 917  square miles
Gage datum 433.70 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 1921-10-01 -> 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 1,070 1,370 1,050 2,230 2,440 1,060 943 301 289 363 713 813
2 963 1,100 955 1,680 2,550 1,030 909 290 303 373 622 867
3 881 1,080 1,070 1,330 2,030 857 566 280 312 322 688 781
4 899 883 1,180 1,580 1,810 708 441 358 251 266 654 853
5 1,140 770 1,290 1,890 1,670 730 371 391 269 267 557 1,000
6 1,070 785 1,270 1,710 1,640 719 354 379 257 300 817 794
7 773 919 1,360 1,500 1,800 719 453 276 214 297 757 639
8 667 926 1,450 1,300 1,780 827 588 236 233 273 649 533
9 687 873 1,260 1,470 1,720 889 566 243 307 268 548 494
10 666 835 1,290 1,620 1,710 981 470 329 278 327 476 515
11 722 940 1,520 1,690 1,370 1,150 466 392 267 295 553 621
12 856 881 1,920 2,050 1,350 1,010 433 372 252 280 519 789
13 1,040 841 1,940 2,050 1,440 840 472 441 269 275 494 679
14 1,120 946 1,570 1,800 1,460 788 573 429 368 291 636 738
15 1,230 1,100 1,430 1,830 1,640 831 538 428 423 294 803 835
16 1,030 1,090 1,440 1,850 1,600 742 392 463 292 262 946 870
17 717 1,120 1,390 1,740 1,650 736 411 543 293 274 827 920
18 809 1,250 1,410 1,500 1,940 811 422 391 316 308 776 935
19 954 1,370 1,840 1,470 1,920 888 467 261 276 336 750 953
20 1,020 1,250 2,190 1,640 1,430 807 466 242 256 337 914 757
21 903 1,120 2,060 1,630 1,270 951 399 278 263 347 987 789
22 883 1,250 1,640 1,670 1,080 850 358 256 331 388 615 841
23 873 1,360 1,290 1,810 1,100 820 457 249 472 456 585 895
24 873 1,400 1,280 1,700 1,150 567 481 261 723 371 612 844
25 905 1,450 1,470 1,760 1,210 550 403 257 829 293 709 988
26 978 1,430 1,710 1,750 1,220 700 393 236 602 270 723 908
27 878 1,280 1,570 1,630 1,410 745 329 254 491 269 863 933
28 826 1,260 1,380 1,590 1,380 673 321 254 316 273 868 1,210
29 833 656 1,490 1,940 1,090 628 412 249 291 315 906 1,440
30 1,010   1,870 2,230 887 661 461 265 277 444 689 1,320
31 1,410   2,030   834   390 280   594   1,220