LOCATION.-- Lat 41°49'21", long 88°10'24" (NAD of 1983), in SW1/4NE1/4 sec.35, T.39 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank 400 ft upstream from Warrenville Forest Preserve Dam in Warrenville, 0.6 mi downstream from Spring Brook, and at mile 38.9. |
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DRAINAGE AREA.-- 90.4 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1968 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 1977-91. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, crest-stage gage and masonry dam. Datum of gage is 688.59 ft above NGVD of 1929 (Illinois Department of Transportation bench mark) (688.33 ft NAVD 1988). |
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REMARKS.-- Flow slightly regulated by sewage- treatment plants upstream. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,470 ft3/s, July 18, 1996, gage height, 6.41 ft; minimum daily discharge, 7.8 ft3/s, Sept. 14, 1971, Oct. 26, 1972. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood of Oct. 11, 1954, reached a stage of 5.54 ft, from floodmark, discharge not determined. |
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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 2004 TO SEPTEMBER 2005 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 36 | 100 | 152 | 39 | 45 | 152 | 126 | 63 | 47 | 37 | 30 | 19 |
2 | 52 | 208 | 126 | 107 | 43 | 125 | 288 | 60 | 46 | 34 | 29 | 20 |
3 | 43 | 112 | 99 | 126 | 43 | 109 | 208 | 57 | 48 | 31 | 28 | 20 |
4 | 38 | 153 | 82 | 149 | 49 | 103 | 153 | 53 | 64 | 32 | 27 | 18 |
5 | 37 | 128 | 78 | 107 | 70 | 94 | 122 | 51 | 76 | 41 | 27 | 18 |
6 | 36 | 81 | 103 | 91 | 131 | 90 | 109 | 54 | 62 | 36 | 26 | 20 |
7 | 36 | 60 | 288 | 77 | 279 | 96 | 106 | 54 | 56 | 33 | 25 | 20 |
8 | 101 | 51 | 386 | 64 | 291 | 91 | 94 | 48 | 51 | 31 | 26 | 23 |
9 | 114 | 45 | 226 | 56 | 193 | 83 | 87 | 53 | 49 | 29 | 28 | 22 |
10 | 66 | 44 | 145 | 57 | 144 | 81 | 77 | 55 | 47 | 29 | 29 | 19 |
11 | 49 | 39 | 114 | 65 | 119 | 87 | 68 | 70 | 45 | 30 | 31 | 19 |
12 | 44 | 33 | 96 | 229 | 104 | 79 | 178 | 80 | 45 | 31 | 61 | 20 |
13 | 40 | 33 | 81 | 943 | 135 | 70 | 334 | 75 | e43 | 29 | 65 | 20 |
14 | 37 | 35 | 63 | 844 | 431 | 69 | 188 | 67 | 40 | 28 | 41 | 22 |
15 | 40 | 32 | 55 | 373 | 382 | 74 | 130 | 58 | 39 | 29 | 36 | 23 |
16 | 34 | 30 | 52 | 218 | 305 | 81 | 108 | 54 | 35 | 28 | 33 | 34 |
17 | 33 | 30 | 50 | 148 | 212 | 75 | 94 | 53 | 34 | 26 | 31 | 30 |
18 | 34 | 32 | 46 | 115 | 156 | 73 | 85 | 50 | 33 | 26 | 36 | 24 |
19 | 34 | 80 | 42 | 102 | 131 | 77 | 79 | 241 | 33 | 26 | 48 | 30 |
20 | 32 | 81 | 40 | 85 | 132 | 79 | 75 | 216 | 34 | 38 | 209 | 36 |
21 | 32 | 60 | e36 | 79 | 178 | 74 | 69 | 129 | 34 | 50 | 156 | 29 |
22 | 29 | 47 | e33 | 75 | 147 | 73 | 121 | 90 | 33 | 41 | 81 | 29 |
23 | 110 | 44 | e30 | 66 | 124 | 74 | 182 | 73 | 34 | 35 | 50 | 33 |
24 | 97 | 44 | e30 | 66 | 106 | 73 | 124 | 63 | 33 | 29 | 34 | 33 |
25 | 61 | 67 | e30 | 61 | 98 | 105 | 100 | 58 | 33 | 31 | 26 | 39 |
26 | 48 | 72 | 30 | 59 | 92 | 107 | 84 | 54 | 34 | 65 | 26 | 46 |
27 | 39 | 204 | 29 | 52 | 89 | 95 | 75 | 55 | 35 | 90 | 23 | 36 |
28 | 35 | 290 | 30 | 51 | 156 | 88 | 70 | 53 | 36 | 51 | 21 | 36 |
29 | 61 | 161 | 30 | 48 | --- | 85 | 67 | 50 | 35 | 38 | 20 | 55 |
30 | 75 | 119 | 32 | 47 | --- | 87 | 67 | 48 | 38 | 31 | 22 | 40 |
31 | 57 | --- | 40 | 46 | --- | 161 | --- | 48 | --- | 31 | 21 | --- |
TOTAL | 1580 | 2515 | 2674 | 4645 | 4385 | 2810 | 3668 | 2233 | 1272 | 1116 | 1346 | 833 |
MEAN | 51.0 | 83.8 | 86.3 | 150 | 157 | 90.6 | 122 | 72.0 | 42.4 | 36.0 | 43.4 | 27.8 |
MAX | 114 | 290 | 386 | 943 | 431 | 161 | 334 | 241 | 76 | 90 | 209 | 55 |
MIN | 29 | 30 | 29 | 39 | 43 | 69 | 67 | 48 | 33 | 26 | 20 | 18 |
CFSM | 0.56 | 0.93 | 0.95 | 1.66 | 1.73 | 1.00 | 1.35 | 0.80 | 0.47 | 0.40 | 0.48 | 0.31 |
IN. | 0.65 | 1.03 | 1.10 | 1.91 | 1.80 | 1.16 | 1.51 | 0.92 | 0.52 | 0.46 | 0.55 | 0.34 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1969 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 70.0 | 92.7 | 94.9 | 85.7 | 114 | 155 | 178 | 146 | 116 | 75.4 | 87.5 | 74.2 |
MAX | 366 | 276 | 354 | 250 | 374 | 588 | 396 | 351 | 300 | 283 | 512 | 261 |
(WY) | 2002 | 1986 | 1983 | 1999 | 1997 | 1979 | 1983 | 2003 | 1996 | 1996 | 1987 | 1972 |
MIN | 12.6 | 16.5 | 15.1 | 12.6 | 21.7 | 56.8 | 42.1 | 39.6 | 27.0 | 18.5 | 17.8 | 14.8 |
(WY) | 1972 | 1977 | 1977 | 1977 | 1972 | 1969 | 1986 | 1988 | 1971 | 1971 | 1971 | 1971 |
SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1969 - 2005 | |||
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ANNUAL TOTAL | 40968 | 29077 | ||||
ANNUAL MEAN | 112 | 79.7 | 107 | |||
HIGHEST ANNUAL MEAN | 162 | 1993 | ||||
LOWEST ANNUAL MEAN | 35.1 | 1977 | ||||
HIGHEST DAILY MEAN | 1140 | May 31 | 943 | Jan 13 | 2880 | Aug 15 1987 |
LOWEST DAILY MEAN | 29 | A | 18 | Sep 4,5 | 7.8 | B |
ANNUAL SEVEN-DAY MINIMUM | 30 | Dec 23 | 19 | Sep 1 | 10 | Oct 20 1971 |
MAXIMUM PEAK FLOW | 1100 | Jan 13 | 3470 | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 3.61 | Jan 13 | 6.41 | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 15 | Sep 5 | ||||
ANNUAL RUNOFF (CFSM) | 1.24 | 0.881 | 1.19 | |||
ANNUAL RUNOFF (INCHES) | 16.86 | 11.97 | 16.12 | |||
10 PERCENT EXCEEDS | 226 | 152 | 224 | |||
50 PERCENT EXCEEDS | 58 | 54 | 61 | |||
90 PERCENT EXCEEDS | 33 | 29 | 27 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |