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 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91, and 1999 to current year. |
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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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ALGAE: Water years 2002-03. |
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BENTHIC MACROINVERTEBRATES: Water years 1999 and 2002. |
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FISH: Water years 1999 and 2002-04. |
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HABITAT: Water years 1999 and 2002-04. |
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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 Jan. 28 to Mar. 5, which are fair, and 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 | 101 | 68 | 373 | 935 | e115 | 166 | 2600 | 110 | 5500 | 190 | 56 | 2180 |
2 | 86 | 61 | 307 | 695 | e110 | 307 | 1630 | 110 | 3380 | 173 | 53 | 903 |
3 | 76 | 59 | 280 | 590 | e105 | 273 | 1050 | 105 | 1720 | 166 | 49 | 511 |
4 | 77 | 59 | 267 | 776 | e100 | 261 | 733 | 101 | 920 | 223 | 69 | 536 |
5 | 72 | 72 | 271 | 2300 | e103 | 1560 | 546 | 100 | 590 | 286 | 98 | 374 |
6 | 63 | 148 | 295 | e1300 | e107 | 2510 | 452 | 97 | 444 | 198 | 92 | 290 |
7 | 58 | 171 | 345 | e850 | e110 | 1610 | 406 | 94 | 355 | 180 | 70 | 237 |
8 | 54 | 138 | 420 | e680 | e100 | 925 | 361 | 92 | 296 | 178 | 56 | 195 |
9 | 50 | 111 | 457 | 508 | e90 | 599 | 305 | 90 | 254 | 143 | 48 | 167 |
10 | 50 | 98 | 501 | 406 | e100 | 432 | 260 | 88 | 235 | 671 | 43 | 145 |
11 | 49 | 96 | 747 | 360 | 115 | 358 | 237 | 93 | 1780 | 1980 | 39 | 128 |
12 | 47 | 186 | 623 | 347 | 122 | 295 | 212 | 99 | 7590 | 1900 | 37 | 117 |
13 | 46 | 449 | 457 | 308 | 112 | 246 | 200 | 108 | 9860 | 1220 | 36 | 107 |
14 | 50 | 314 | 386 | 280 | 109 | 222 | 188 | 229 | 6070 | 642 | 35 | 99 |
15 | 118 | 216 | 335 | 269 | 116 | 204 | 172 | 1110 | 3340 | 370 | 32 | 97 |
16 | 163 | 175 | 302 | 237 | 103 | 189 | 162 | 968 | 1900 | 236 | 30 | 104 |
17 | 136 | 147 | 265 | 228 | 106 | 183 | 156 | 590 | 3670 | 224 | 29 | 99 |
18 | 110 | 336 | 239 | 229 | 109 | 180 | 148 | 468 | 4420 | 401 | 61 | 91 |
19 | 97 | 2590 | 220 | 193 | 163 | 167 | 141 | 948 | 3080 | 351 | 70 | 86 |
20 | 87 | 3080 | 186 | e185 | 762 | 158 | 142 | 813 | 1960 | 209 | 66 | 80 |
21 | 78 | 1830 | 189 | e180 | 1090 | 153 | 159 | 589 | 1080 | 154 | 74 | 76 |
22 | 75 | 1080 | 196 | e170 | 545 | 139 | 156 | 495 | 668 | 128 | 63 | 73 |
23 | 70 | 731 | 653 | e180 | 305 | 134 | 147 | 1330 | 505 | 114 | 51 | 69 |
24 | 67 | 1290 | 1690 | e160 | 269 | 136 | 136 | 996 | 417 | 97 | 138 | 66 |
25 | 65 | 1760 | 1260 | e130 | 234 | 143 | 135 | 842 | 362 | 85 | 1530 | 64 |
26 | 67 | 1240 | 737 | e140 | 194 | 443 | 134 | 1200 | 325 | 78 | 4390 | 62 |
27 | 75 | 860 | 512 | e150 | 170 | 2740 | 125 | 1020 | 286 | 73 | 5450 | 60 |
28 | 96 | 669 | 436 | e130 | 153 | 2750 | 119 | 689 | 259 | 67 | 3730 | 59 |
29 | 96 | 540 | 1250 | 136 | 147 | 1910 | 114 | 439 | 230 | 62 | 5010 | 58 |
30 | 86 | 450 | 2410 | 133 | --- | 1830 | 111 | 619 | 208 | 60 | 6170 | 55 |
31 | 75 | --- | 1560 | 129 | --- | 2620 | --- | 4190 | --- | 59 | 4260 | --- |
TOTAL | 2440 | 19024 | 18169 | 13314 | 5964 | 23843 | 11437 | 18822 | 61704 | 10918 | 31935 | 7188 |
MEAN | 78.7 | 634 | 586 | 429 | 206 | 769 | 381 | 607 | 2057 | 352 | 1030 | 240 |
MAX | 163 | 3080 | 2410 | 2300 | 1090 | 2750 | 2600 | 4190 | 9860 | 1980 | 6170 | 2180 |
MIN | 46 | 59 | 186 | 129 | 90 | 134 | 111 | 88 | 208 | 59 | 29 | 55 |
CFSM | 0.18 | 1.42 | 1.31 | 0.96 | 0.46 | 1.72 | 0.85 | 1.36 | 4.61 | 0.79 | 2.31 | 0.54 |
IN. | 0.20 | 1.59 | 1.52 | 1.11 | 0.50 | 1.99 | 0.95 | 1.57 | 5.15 | 0.91 | 2.66 | 0.60 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 140 | 225 | 359 | 392 | 538 | 646 | 688 | 577 | 522 | 330 | 124 | 113 |
MAX | 1813 | 1964 | 1361 | 2240 | 1918 | 1915 | 1908 | 1824 | 2057 | 1599 | 1030 | 1250 |
(WY) | 2002 | 1986 | 1991 | 1950 | 1951 | 1979 | 1994 | 1998 | 2004 | 1993 | 2004 | 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 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1948 - 2004 | |||
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ANNUAL TOTAL | 158074 | 224758 | ||||
ANNUAL MEAN | 433 | 614 | 387 | |||
HIGHEST ANNUAL MEAN | 855 | 1993 | ||||
LOWEST ANNUAL MEAN | 87.2 | 1954 | ||||
HIGHEST DAILY MEAN | 6130 | Jul 11 | 9860 | Jun 13 | 15200 | Apr 13 1994 |
LOWEST DAILY MEAN | 18 | Aug 28 | 29 | Aug 17 | 2.5 | Sep 1 1972 |
ANNUAL SEVEN-DAY MINIMUM | 22 | Aug 23 | 34 | Aug 11 | 2.9 | Sep 11 1988 |
MAXIMUM PEAK FLOW | 10400 | Jun 12 | 22900 A | Feb 21 1951 | ||
MAXIMUM PEAK STAGE | 24.28 | Jun 12 | 28.16 B | Apr 12 1994 | ||
INSTANTANEOUS LOW FLOW | 26 | Aug 17 | 2.0 | C | ||
ANNUAL RUNOFF (CFSM) | 0.971 | 1.38 | 0.868 | |||
ANNUAL RUNOFF (INCHES) | 13.18 | 18.75 | 11.79 | |||
10 PERCENT EXCEEDS | 1130 | 1700 | 1000 | |||
50 PERCENT EXCEEDS | 167 | 189 | 130 | |||
90 PERCENT EXCEEDS | 50 | 64 | 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 |