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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BENTHIC MACROINVERTEBRATES: Water year 1999, and 2002. |
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FISH: Water years 1999, and 2002-03. |
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HABITAT: Water years 1999, and 2002-03. |
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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, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 14 | 22 | 21 | 341 | e68 | e70 | 73 | 151 | 702 | 123 | 134 | 318 |
2 | 14 | 21 | 20 | 230 | 76 | e74 | 74 | 145 | 453 | 244 | 122 | 1520 |
3 | 13 | 21 | 20 | 165 | 85 | 66 | 69 | 130 | 362 | 261 | 146 | 1610 |
4 | 16 | 20 | 20 | 121 | e100 | 68 | 77 | 122 | 308 | 191 | 177 | 704 |
5 | 17 | 23 | 20 | 110 | e110 | 89 | 908 | 464 | 258 | 149 | 156 | 302 |
6 | 16 | 27 | 18 | 93 | e100 | 128 | 1160 | 779 | 224 | 949 | 125 | 186 |
7 | 15 | 29 | 18 | 77 | e90 | 133 | 960 | 563 | 214 | 2530 | 107 | 134 |
8 | 15 | 28 | 19 | 80 | e80 | 201 | 1210 | 874 | 199 | 3220 | 93 | 105 |
9 | 15 | 27 | 17 | 183 | e70 | 484 | 1000 | 2940 | 185 | 2720 | 98 | 88 |
10 | 15 | 29 | 17 | 260 | e63 | 348 | 753 | 4210 | 168 | 4950 | 106 | 74 |
11 | 14 | 58 | 17 | 177 | e56 | 223 | 584 | 3490 | 179 | 6130 | 88 | 65 |
12 | 14 | 46 | 17 | 261 | e50 | 177 | 472 | 2420 | 584 | 4380 | 73 | 58 |
13 | 14 | 37 | 18 | 150 | e47 | 174 | 387 | 1400 | 944 | 2860 | 63 | 53 |
14 | 16 | 36 | 19 | 117 | e50 | 167 | 329 | 871 | 1800 | 1610 | 59 | 51 |
15 | 14 | 35 | 19 | 102 | e52 | 136 | 293 | 1220 | 1640 | 1100 | 56 | 51 |
16 | 14 | 32 | 19 | 95 | e50 | 136 | 270 | 968 | 1110 | 1080 | 52 | 46 |
17 | 15 | 29 | 18 | e87 | e44 | 168 | 248 | 730 | 712 | 727 | 48 | 40 |
18 | 15 | 27 | 21 | e78 | e45 | 185 | 219 | 584 | 496 | 1660 | 46 | 36 |
19 | 19 | 26 | 37 | e68 | e47 | 173 | 193 | 488 | 409 | 3660 | 41 | 35 |
20 | 21 | 26 | 119 | e62 | e52 | 166 | 199 | 439 | 337 | 3300 | 38 | 34 |
21 | 21 | 25 | 160 | e57 | e62 | 186 | 269 | 413 | 289 | 2020 | 34 | 32 |
22 | 20 | 26 | 124 | e53 | e80 | 197 | 251 | 378 | 256 | 1220 | 32 | 34 |
23 | 18 | 25 | 87 | e50 | e100 | 169 | 211 | 342 | 227 | 717 | 28 | 45 |
24 | 17 | 25 | 64 | e49 | e130 | 137 | 187 | 307 | 201 | 465 | 24 | 42 |
25 | 18 | 24 | e60 | e48 | e100 | 124 | 188 | 278 | 178 | 339 | 21 | 39 |
26 | 19 | 24 | e53 | e48 | e83 | 117 | 190 | 249 | 165 | 271 | 20 | 40 |
27 | 18 | 23 | e43 | e50 | e75 | 114 | 192 | 223 | 154 | 232 | 19 | 236 |
28 | 18 | 21 | 40 | e53 | e70 | 114 | 173 | 209 | 143 | 210 | 18 | 489 |
29 | 18 | 22 | 37 | e56 | --- | 109 | 163 | 364 | 135 | 195 | 27 | 214 |
30 | 22 | 22 | 46 | e60 | --- | 89 | 150 | 316 | 128 | 170 | 126 | 130 |
31 | 25 | --- | 264 | e64 | --- | 77 | --- | 521 | --- | 149 | e142 | --- |
TOTAL | 520 | 836 | 1472 | 3445 | 2035 | 4799 | 11452 | 26588 | 13160 | 47832 | 2319 | 6811 |
MEAN | 16.8 | 27.9 | 47.5 | 111 | 72.7 | 155 | 382 | 858 | 439 | 1543 | 74.8 | 227 |
MAX | 25 | 58 | 264 | 341 | 130 | 484 | 1210 | 4210 | 1800 | 6130 | 177 | 1610 |
MIN | 13 | 20 | 17 | 48 | 44 | 66 | 69 | 122 | 128 | 123 | 18 | 32 |
CFSM | 0.04 | 0.06 | 0.11 | 0.25 | 0.16 | 0.35 | 0.86 | 1.92 | 0.98 | 3.46 | 0.17 | 0.51 |
IN. | 0.04 | 0.07 | 0.12 | 0.29 | 0.17 | 0.40 | 0.96 | 2.22 | 1.10 | 3.99 | 0.19 | 0.57 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 142 | 218 | 355 | 391 | 544 | 644 | 693 | 576 | 494 | 330 | 108 | 110 |
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 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1948 - 2003 | |||
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ANNUAL TOTAL | 165258 | 121269 | ||||
ANNUAL MEAN | 453 | 332 | 383 | |||
HIGHEST ANNUAL MEAN | 855 | 1993 | ||||
LOWEST ANNUAL MEAN | 87.2 | 1954 | ||||
HIGHEST DAILY MEAN | 7330 | May 13 | 6130 | Jul 11 | 15200 | Apr 13 1994 |
LOWEST DAILY MEAN | 13 | Oct 3 | 13 | Oct 3 | 2.5 | Sep 1 1972 |
ANNUAL SEVEN-DAY MINIMUM | 14 | Oct 10 | 14 | Oct 10 | 2.9 | Sep 11 1988 |
MAXIMUM PEAK FLOW | 6670 | Jul 11 | 22900 A | Feb 21 1951 | ||
MAXIMUM PEAK STAGE | 19.93 | Jul 11 | 28.16 B | Apr 12 1994 | ||
INSTANTANEOUS LOW FLOW | 13 | C | 2.0 | D | ||
ANNUAL RUNOFF (CFSM) | 1.02 | 0.74 | 0.86 | |||
ANNUAL RUNOFF (INCHES) | 13.78 | 10.11 | 11.66 | |||
10 PERCENT EXCEEDS | 1170 | 816 | 1000 | |||
50 PERCENT EXCEEDS | 131 | 100 | 128 | |||
90 PERCENT EXCEEDS | 18 | 19 | 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 |