LOCATION.-- Lat 40°37'48", long 87°43'26" (NAD of 1927), in NW1/4NE1/4 sec.16, T.25 N., R.12 W., Iroquois County, Hydrologic Unit 07120002, on pier at downstream side of bridge on County Highway 9,200 ft downstream from Mud Creek, 1 mi west of Milford, and at mile 23.9. |
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DRAINAGE AREA.-- 446 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: July 1948 to current year. |
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STAGE: Water years 1994-2002. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91, and 1999 to current. |
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MISCELLANEOUS: Contaminants in streambed sediments, August 1999; contaminants in fish tissue, August 1999. |
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BIOLOGICAL |
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BENTHIC MACROINVERTEBRATES: Water year 1999. |
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FISH: Water years 1999, and 2002. |
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HABITAT: Water years 1999, and 2002. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 622.00 ft above NGVD of 1929. Prior to July 23, 1970, 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, 22,900 ft3/s, Feb. 21, 1951, gage height, 20.90 ft, from rating curve extended above 8,200 ft3/s; maximum gage height, 28.16 ft, Apr. 12, 1994, discharge, 19,400 ft3/s; minimum discharge, 2.0 ft3/s, Sept. 1, 2, 7, 1972, Oct. 8, 1994. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 20 | 518 | 1450 | e200 | 5520 | 450 | 1710 | 1340 | 227 | 151 | 67 | e54 |
2 | 19 | 466 | 1110 | e185 | 4690 | 454 | 1060 | 1460 | 214 | 131 | 87 | e47 |
3 | 18 | 449 | 750 | e178 | 2830 | 1250 | 763 | 1140 | 200 | 117 | 132 | e39 |
4 | 17 | 430 | 542 | e176 | 1640 | 1260 | 588 | 843 | 191 | 107 | 79 | 36 |
5 | 35 | 393 | 430 | e172 | 981 | 882 | 492 | 649 | 231 | 97 | 59 | 32 |
6 | 321 | 355 | 371 | e158 | 648 | 720 | 432 | 551 | 472 | 85 | 50 | 28 |
7 | 471 | 325 | 329 | e145 | 503 | 1030 | 392 | 510 | 374 | 76 | 44 | 26 |
8 | 322 | 302 | 293 | e142 | 409 | 1000 | 420 | 520 | 281 | 71 | 40 | 25 |
9 | 204 | 273 | 261 | e144 | 354 | 1390 | 1030 | 853 | 239 | 109 | 37 | 24 |
10 | 145 | 258 | 231 | 148 | 342 | 2560 | 938 | 1430 | 231 | 209 | 34 | 23 |
11 | 123 | 246 | 216 | 130 | 342 | 1650 | 661 | 1220 | 375 | 131 | 30 | 22 |
12 | 505 | 218 | 202 | 123 | 361 | 949 | 533 | 4210 | 567 | 97 | 26 | 20 |
13 | 1430 | 206 | 243 | 125 | 331 | 703 | 449 | 7330 | 449 | 82 | 26 | 19 |
14 | 5040 | 202 | 369 | 124 | 288 | 606 | 401 | 4970 | 442 | 72 | 26 | 19 |
15 | 7560 | 194 | 821 | 119 | 275 | 533 | 372 | 3050 | 493 | 64 | 27 | 19 |
16 | 6000 | 189 | 812 | 105 | 258 | 460 | 333 | 1790 | 424 | 56 | 26 | 19 |
17 | 5320 | 175 | 1200 | 102 | 234 | 420 | 305 | 1430 | 321 | 49 | 29 | 18 |
18 | 3700 | 167 | 2080 | 98 | 206 | 393 | 284 | 1270 | 260 | 46 | 26 | 18 |
19 | 2250 | 169 | 1730 | 131 | 602 | 350 | 279 | 1060 | 220 | 109 | 1090 | 22 |
20 | 1330 | 163 | 1120 | 105 | 4020 | 341 | 259 | 797 | 195 | 92 | 3560 | 23 |
21 | 856 | 152 | 738 | 102 | 4550 | 314 | 291 | 619 | 177 | 67 | 3570 | 25 |
22 | 885 | 153 | 575 | 98 | 2860 | 279 | 537 | 516 | 165 | 52 | 2010 | 22 |
23 | 1330 | 144 | 543 | 98 | 1630 | 278 | 486 | 455 | 158 | 299 | 1060 | 20 |
24 | 2150 | 145 | 520 | 102 | 1040 | 268 | 399 | 409 | 151 | 303 | 1620 | 18 |
25 | 4700 | 169 | 431 | 93 | 760 | 262 | 400 | 357 | 142 | 154 | 1630 | 17 |
26 | 4540 | 171 | 364 | 88 | 630 | 246 | 391 | 321 | 421 | 101 | 1010 | 16 |
27 | 2930 | 163 | 344 | 88 | 546 | 252 | 479 | 291 | 504 | 82 | 445 | 16 |
28 | 1660 | 148 | 311 | 88 | 498 | 282 | 2880 | 275 | 316 | 71 | 218 | 16 |
29 | 1030 | 147 | 259 | 92 | --- | 961 | 3360 | 265 | 231 | 73 | 143 | 15 |
30 | 718 | 824 | e240 | 149 | --- | 2480 | 2090 | 255 | 183 | 104 | e88 | 14 |
31 | 589 | --- | e220 | 1810 | --- | 2730 | --- | 248 | --- | 83 | e68 | --- |
TOTAL | 56218 | 7914 | 19105 | 5618 | 37348 | 25753 | 23014 | 40434 | 8854 | 3340 | 17357 | 712 |
MEAN | 1813 | 263.8 | 616.3 | 181.2 | 1334 | 830.7 | 767.1 | 1304 | 295.1 | 107.7 | 559.9 | 23.73 |
MAX | 7560 | 824 | 2080 | 1810 | 5520 | 2730 | 3360 | 7330 | 567 | 303 | 3570 | 54 |
MIN | 17 | 144 | 202 | 88 | 206 | 246 | 259 | 248 | 142 | 46 | 26 | 14 |
CFSM | 4.07 | 0.59 | 1.38 | 0.41 | 2.99 | 1.86 | 1.72 | 2.92 | 0.66 | 0.24 | 1.26 | 0.05 |
IN. | 4.69 | 0.66 | 1.59 | 0.47 | 3.12 | 2.15 | 1.92 | 3.37 | 0.74 | 0.28 | 1.45 | 0.06 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 143.8 | 221.6 | 360.5 | 396.0 | 553.1 | 653.3 | 699.2 | 570.9 | 495.0 | 307.6 | 108.5 | 108.3 |
MAX | 1813 | 1964 | 1361 | 2240 | 1918 | 1915 | 1908 | 1824 | 1722 | 1599 | 814 | 1250 |
(WY) | 2002 | 1986 | 1991 | 1950 | 1951 | 1979 | 1994 | 1998 | 1980 | 1993 | 1977 | 1993 |
MIN | 4.55 | 7.69 | 5.57 | 4.06 | 12.0 | 64.5 | 110 | 56.6 | 27.2 | 10.8 | 6.13 | 4.27 |
(WY) | 1964 | 1964 | 1964 | 1977 | 1963 | 1981 | 1986 | 1988 | 1988 | 1988 | 1988 | 1988 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1948 - 2002 | |||
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ANNUAL TOTAL | 202983 | 245667 | ||||
ANNUAL MEAN | 556.1 | 673.1 | 383.8 | |||
HIGHEST ANNUAL MEAN | 855 | 1993 | ||||
LOWEST ANNUAL MEAN | 87.2 | 1954 | ||||
HIGHEST DAILY MEAN | 7560 | Oct 15 | 7560 | Oct 15 | 15200 | Apr 13 1994 |
LOWEST DAILY MEAN | 16 | Aug 14-16 | 14 | Sep 30 | 2.5 | Sep 1 1972 |
ANNUAL SEVEN-DAY MINIMUM | 17 | Aug 11 | 16 | Sep 24 | 2.9 | Sep 11 1988 |
MAXIMUM PEAK FLOW | 8090 | Oct 15 | 22900 A | Feb 21 1951 | ||
MAXIMUM PEAK STAGE | 20.51 | Oct 15 | 28.16 B | Apr 12 1994 | ||
INSTANTANEOUS LOW FLOW | 13 | Sep 30 | 2.0 | C | ||
ANNUAL RUNOFF (CFSM) | 1.25 | 1.51 | 0.86 | |||
ANNUAL RUNOFF (INCHES) | 16.93 | 20.49 | 11.69 | |||
10 PERCENT EXCEEDS | 1340 | 1640 | 1000 | |||
50 PERCENT EXCEEDS | 220 | 282 | 129 | |||
90 PERCENT EXCEEDS | 32 | 30 | 11 |
A - Gage height, 20.90 ft., from rating curve extended above 8,200 ft3/s. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |