LOCATION.-- Lat 40°49'22", long 87°34'53" (NAD of 1927), in NE1/4SE1/4 sec.15, T.27 N., R.11 W., Iroquois County, Hydrologic Unit 07120002, on left bank at upstream side of bridge on U.S. Highway 52 in Iroquois, 500 ft upstream from a railroad bridge, 4.5 mi downstream from Indiana-Illinois State line, and at mile 50.4. |
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DRAINAGE AREA.-- 686 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1944 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91. Additional chemical data for water years 1972-77 are published in Water-Resources Investigations 78-23 and 79-24 as site FL 04. |
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SEDIMENT: October 1978 to September 1980, January 1993 to December 1995. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 614.34 ft above NGVD of 1929. Prior to Aug. 5, 1945, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 10,400 ft3/s, June 13, 1958, gage height, 26.31 ft; minimum, 5.2 ft3/s, Sept. 13, 1964. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 2,280 mg/L, June 2, 1980; minimum daily, 3 mg/L, Dec. 23, 24, 27-31, 1978. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 12,200 tons, June 3, 1980; minimum daily, 0.45 ton, Dec. 28, 1978. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 271 | 389 | 1050 | 2020 | e240 | 342 | 1610 | 232 | 1770 | 251 | 69 | 3020 |
2 | 219 | 358 | 851 | 1940 | e230 | 470 | 1540 | 240 | 1970 | 227 | 66 | 2630 |
3 | 202 | 340 | 703 | 1780 | e220 | 647 | 1420 | 249 | 2100 | 209 | 63 | 2240 |
4 | 196 | 335 | 625 | 1580 | e200 | 704 | 1250 | 255 | 2100 | 228 | 111 | 1950 |
5 | 192 | 392 | 599 | 1550 | e190 | 1190 | 1030 | 255 | 1970 | 245 | 263 | 1810 |
6 | 180 | 628 | 612 | 1500 | e210 | 1670 | 829 | 244 | 1760 | 227 | 337 | 1730 |
7 | 171 | 735 | 646 | 1400 | e230 | 1780 | 692 | 239 | 1480 | 203 | 263 | 1610 |
8 | 169 | 679 | 722 | 1210 | e240 | 1750 | 612 | 279 | 1110 | 186 | 178 | 1430 |
9 | 164 | 573 | 843 | 1010 | e200 | 1610 | 548 | 357 | 751 | 170 | 130 | 1220 |
10 | 162 | 486 | 991 | 824 | e200 | 1390 | 490 | 360 | 528 | 172 | 107 | 963 |
11 | 158 | 443 | 1190 | 695 | e200 | 1130 | 447 | 357 | 997 | 198 | 97 | 686 |
12 | 153 | 425 | 1290 | 636 | e230 | 882 | 415 | 446 | 4070 | 211 | 96 | 488 |
13 | 152 | 404 | 1280 | 595 | e250 | 688 | 393 | 486 | 6510 | 189 | 101 | 387 |
14 | 165 | 371 | 1190 | 574 | e230 | 578 | 379 | 505 | 6220 | 162 | 98 | 336 |
15 | 270 | 341 | 1030 | 573 | e210 | 525 | 356 | 744 | 5540 | 142 | 89 | 305 |
16 | 412 | 323 | 866 | 544 | e205 | 498 | 338 | 733 | 4770 | 128 | 83 | 288 |
17 | 418 | 310 | 730 | 511 | e210 | 480 | 327 | 642 | 4220 | 125 | 79 | 277 |
18 | 365 | 394 | 638 | 492 | e215 | 466 | 315 | 559 | 3660 | 188 | 76 | 267 |
19 | 321 | 1110 | 569 | e470 | e220 | 450 | 303 | 601 | 2960 | 244 | 77 | 251 |
20 | 292 | 1500 | 510 | e450 | 372 | 434 | 294 | 621 | 2330 | 199 | 150 | 231 |
21 | 278 | 1630 | 462 | e420 | 538 | 422 | 306 | 584 | 1770 | 154 | 389 | 217 |
22 | 273 | 1660 | 436 | e380 | 580 | 398 | 308 | 519 | 1240 | 132 | 517 | 208 |
23 | 263 | 1600 | 633 | e340 | 529 | 373 | 296 | 463 | 836 | 117 | 528 | 198 |
24 | 241 | 1710 | 1200 | e390 | 469 | 363 | 274 | 423 | 603 | 111 | 464 | 189 |
25 | 264 | 1810 | 1400 | e320 | 404 | 380 | 272 | 403 | 488 | 102 | 401 | 183 |
26 | 452 | 1790 | 1410 | e290 | 359 | 627 | 277 | 380 | 425 | 93 | 1280 | 178 |
27 | 637 | 1730 | 1320 | e320 | 336 | 1220 | 276 | 351 | 377 | 86 | 1600 | 172 |
28 | 649 | 1610 | 1170 | e270 | 324 | 1430 | 262 | 322 | 337 | 82 | 1580 | 168 |
29 | 580 | 1450 | 1360 | e250 | 320 | 1550 | 245 | 288 | 305 | 77 | 2730 | 164 |
30 | 500 | 1260 | 1840 | e260 | --- | 1570 | 232 | 318 | 276 | 73 | 3490 | 160 |
31 | 437 | --- | 1990 | e260 | --- | 1580 | --- | 1160 | --- | 71 | 3350 | --- |
TOTAL | 9206 | 26786 | 30156 | 23854 | 8361 | 27597 | 16336 | 13615 | 63473 | 5002 | 18862 | 23956 |
MEAN | 297 | 893 | 973 | 769 | 288 | 890 | 545 | 439 | 2116 | 161 | 608 | 799 |
MAX | 649 | 1810 | 1990 | 2020 | 580 | 1780 | 1610 | 1160 | 6510 | 251 | 3490 | 3020 |
MIN | 152 | 310 | 436 | 250 | 190 | 342 | 232 | 232 | 276 | 71 | 63 | 160 |
CFSM | 0.43 | 1.30 | 1.42 | 1.12 | 0.42 | 1.30 | 0.79 | 0.64 | 3.08 | 0.24 | 0.89 | 1.16 |
IN. | 0.50 | 1.45 | 1.64 | 1.29 | 0.45 | 1.50 | 0.89 | 0.74 | 3.44 | 0.27 | 1.02 | 1.30 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 265 | 345 | 532 | 616 | 804 | 1059 | 1069 | 849 | 757 | 486 | 152 | 192 |
MAX | 2556 | 1878 | 1794 | 3030 | 2213 | 3462 | 3116 | 1956 | 3496 | 4336 | 608 | 2020 |
(WY) | 1994 | 1986 | 1968 | 1950 | 1950 | 1982 | 1950 | 2002 | 1958 | 2003 | 2004 | 1993 |
MIN | 10.6 | 18.0 | 16.9 | 20.6 | 27.7 | 94.8 | 249 | 141 | 53.7 | 23.4 | 11.4 | 11.7 |
(WY) | 1957 | 1957 | 1964 | 1945 | 1963 | 1957 | 1946 | 1958 | 1988 | 1988 | 1988 | 1964 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1945 - 2004 | |||
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ANNUAL TOTAL | 280942 | 267204 | ||||
ANNUAL MEAN | 770 | 730 | 592 | |||
HIGHEST ANNUAL MEAN | 1323 | 1993 | ||||
LOWEST ANNUAL MEAN | 121 | 1964 | ||||
HIGHEST DAILY MEAN | 9830 | Jul 12 | 6510 | Jun 13 | 10200 | Jun 14 1958 |
LOWEST DAILY MEAN | 42 A | Jan 27 | 63 | Aug 3 | 5.5 | Sep 13 1964 |
ANNUAL SEVEN-DAY MINIMUM | 45 | Jan 23 | 72 | Jul 28 | 6.6 | Sep 8 1964 |
MAXIMUM PEAK FLOW | 6740 | Jun 13 | 10400 | Jun 13 1958 | ||
MAXIMUM PEAK STAGE | 22.74 | Jun 13 | 26.31 | Jun 13 1958 | ||
INSTANTANEOUS LOW FLOW | 60 | Aug 3 | 5.2 | Sep 13 1964 | ||
ANNUAL RUNOFF (CFSM) | 1.12 | 1.06 | 0.863 | |||
ANNUAL RUNOFF (INCHES) | 15.23 | 14.49 | 11.73 | |||
10 PERCENT EXCEEDS | 1640 | 1680 | 1610 | |||
50 PERCENT EXCEEDS | 290 | 404 | 269 | |||
90 PERCENT EXCEEDS | 106 | 163 | 34 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |