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USGS Surface-Water Daily Statistics for Indiana

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NOTE: USGS Indiana historic, recent, and real-time data will continue to be provided in Eastern Standard Time.


NOTE: During winter months, stage and discharge may be affected by ice. Click here for more information.

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 04180988 St. Marys River at Rockford OH


Mercer County, Ohio
Hydrologic Unit Code 04100004
Latitude  40°41'41", Longitude  84°38'48" NAD27
Drainage area 340  square miles
Gage datum 787.39 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 2005-10-01 -> 2020-09-30)

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
1 634 250 944 597 449 352 440 67 62 140 188 568
2 587 248 1,130 532 436 323 357 68 46 115 218 693
3 562 219 1,150 498 494 326 308 58 31 91 308 798
4 486 216 1,060 590 575 317 282 48 26 71 330 707
5 403 298 871 763 570 334 227 63 25 64 280 507
6 417 599 711 809 597 334 166 73 24 91 226 422
7 457 907 657 688 581 292 122 66 31 161 183 431
8 433 938 588 605 484 241 118 48 42 216 166 393
9 370 765 567 540 367 224 186 36 93 181 159 306
10 425 529 621 520 358 248 289 44 135 122 141 254
11 542 510 705 534 376 287 333 59 165 81 118 225
12 625 617 806 604 378 314 300 64 164 55 102 262
13 830 617 886 703 366 322 283 52 132 40 102 292
14 958 543 906 669 381 336 297 41 83 33 115 324
15 1,050 469 935 552 451 379 339 37 49 29 138 327
16 989 382 1,090 492 435 575 362 36 30 29 180 306
17 783 351 1,060 509 451 780 311 37 27 42 231 298
18 557 418 767 491 641 788 250 48 32 56 344 277
19 444 542 550 436 671 753 231 57 27 99 458 234
20 426 545 488 489 575 674 218 47 24 192 503 198
21 419 491 501 617 466 609 189 62 28 239 428 223
22 410 500 413 604 409 606 198 90 33 270 338 361
23 389 708 354 455 328 559 274 100 39 276 296 577
24 392 668 383 321 292 530 282 110 34 230 310 709
25 456 569 447 266 339 484 240 103 30 189 355 647
26 543 489 466 428 347 418 160 79 35 158 362 541
27 500 460 399 767 397 448 112 62 54 132 349 496
28 410 556 426 912 535 555 73 45 74 132 348 550
29 337 290 472 708 604 590 59 36 76 139 381 721
30 285   540 515 536 512 68 47 67 161 435 793
31 251   611   433   65 59   180   723