LOCATION.-- Lat 41°54'39", long 88°10'44" (NAD of 1927), in SE1/4NW1/4 sec.35, T.40 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on left bank at downstream side of bridge on State Highway 64, 2 mi northeast of West Chicago, and at mile 49.2. |
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DRAINAGE AREA.-- 28.5 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: July 1961 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 1979-91. |
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BIOLOGICAL |
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ALGAE: Pigment and biomass, Water year 1990. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-77-1: 1966-67(M). |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 717.76 ft above NGVD of 1929. |
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REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plant upstream from station. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 984 ft3/s, Dec. 3, 1982, gage height, 10.44 ft; maximum gage height, 10.91 ft, Oct. 14, 2001; minimum discharge, .20 ft3/s, July 1, 5, 8-12, 1963. |
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REMARKS FOR CURRENT YEAR.-- Records good. |
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 | 13 | 14 | 24 | 30 | 19 | 57 | 77 | 33 | 278 | 21 | 15 | 21 |
2 | 13 | 39 | 21 | 29 | 18 | 72 | 62 | 27 | 129 | 20 | 15 | 20 |
3 | 15 | 111 | 20 | 29 | 18 | 54 | 55 | 26 | 96 | 23 | 17 | 19 |
4 | 19 | 75 | 20 | 29 | 18 | 61 | 51 | 26 | 80 | 27 | 107 | 18 |
5 | 15 | 168 | 47 | 30 | 17 | 370 | 45 | 22 | 64 | 23 | 38 | 17 |
6 | 14 | 63 | 36 | 25 | 17 | 191 | 41 | 21 | 52 | 21 | 24 | 16 |
7 | 15 | 36 | 30 | 25 | 19 | 106 | 35 | 22 | 46 | 20 | 20 | 18 |
8 | 12 | 28 | 27 | 25 | 20 | 88 | 34 | 20 | 41 | 20 | 18 | 15 |
9 | 13 | 24 | 31 | 25 | 20 | 66 | 33 | 20 | 43 | 31 | 18 | 17 |
10 | 13 | 22 | 287 | 24 | 19 | 56 | 33 | 28 | 104 | 45 | 17 | 15 |
11 | 13 | 21 | 173 | 25 | 20 | 46 | 31 | 48 | 149 | 26 | 16 | 15 |
12 | 15 | 19 | 99 | 26 | 19 | 39 | 30 | 30 | 370 | 24 | 17 | 15 |
13 | 15 | 16 | 78 | 25 | 19 | 35 | 29 | 85 | 192 | 21 | 16 | 15 |
14 | 64 | 15 | 62 | 24 | 19 | 44 | 28 | 183 | 110 | 19 | 16 | 13 |
15 | 37 | 16 | 56 | 24 | 20 | 38 | 29 | 119 | 85 | 18 | 16 | 15 |
16 | 21 | 16 | 49 | 23 | 20 | 34 | 28 | 74 | 67 | 17 | 17 | 20 |
17 | 17 | 17 | 46 | 25 | 19 | 38 | 28 | 56 | 59 | 17 | 19 | 16 |
18 | 15 | 185 | 39 | 27 | 19 | 44 | 28 | 98 | 51 | 17 | 17 | 14 |
19 | 15 | 128 | 38 | 24 | 20 | 46 | 29 | 63 | 43 | 17 | 35 | 15 |
20 | 15 | 68 | 35 | 24 | 65 | 44 | 37 | 55 | 38 | 16 | 20 | 15 |
21 | 13 | 46 | 33 | 22 | 83 | 37 | 54 | 134 | 64 | 17 | 17 | 14 |
22 | 13 | 39 | 33 | 21 | 64 | 35 | 34 | 395 | 67 | 22 | 16 | 14 |
23 | 13 | 48 | 34 | 21 | 87 | 34 | 30 | 219 | 39 | 18 | 15 | 14 |
24 | 13 | 84 | 33 | 22 | 84 | 76 | 29 | 119 | 36 | 16 | 19 | 14 |
25 | 18 | 49 | 31 | 22 | 64 | 74 | 70 | 101 | 35 | 16 | 27 | 14 |
26 | 16 | 38 | 27 | 22 | 55 | 124 | 39 | 84 | 33 | 15 | 21 | 14 |
27 | 18 | 33 | 27 | 21 | 48 | 89 | 32 | 70 | 29 | 15 | 30 | 14 |
28 | 15 | 28 | 43 | 19 | 43 | 121 | 29 | 57 | 28 | 15 | 125 | 14 |
29 | 15 | 27 | 40 | 19 | 42 | 329 | 26 | 46 | 27 | 15 | 59 | 14 |
30 | 15 | 25 | 34 | 18 | --- | 126 | 29 | 207 | 23 | 14 | 33 | 14 |
31 | 14 | --- | 31 | 18 | --- | 94 | --- | 499 | --- | 15 | 27 | --- |
TOTAL | 532 | 1498 | 1584 | 743 | 995 | 2668 | 1135 | 2987 | 2478 | 621 | 867 | 469 |
MEAN | 17.2 | 49.9 | 51.1 | 24.0 | 34.3 | 86.1 | 37.8 | 96.4 | 82.6 | 20.0 | 28.0 | 15.6 |
MAX | 64 | 185 | 287 | 30 | 87 | 370 | 77 | 499 | 370 | 45 | 125 | 21 |
MIN | 12 | 14 | 20 | 18 | 17 | 34 | 26 | 20 | 23 | 14 | 15 | 13 |
CFSM | 0.60 | 1.75 | 1.79 | 0.84 | 1.20 | 3.02 | 1.33 | 3.38 | 2.90 | 0.70 | 0.98 | 0.55 |
IN. | 0.69 | 1.96 | 2.07 | 0.97 | 1.30 | 3.48 | 1.48 | 3.90 | 3.23 | 0.81 | 1.13 | 0.61 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 27.5 | 33.5 | 34.0 | 30.2 | 39.7 | 53.4 | 61.2 | 49.0 | 40.1 | 26.4 | 30.2 | 29.5 |
MAX | 171 | 111 | 134 | 81.5 | 118 | 191 | 135 | 113 | 103 | 63.8 | 135 | 124 |
(WY) | 2002 | 1986 | 1983 | 1999 | 1997 | 1979 | 1983 | 1996 | 1996 | 1993 | 1987 | 2001 |
MIN | 1.54 | 1.62 | 0.97 | 0.87 | 0.75 | 12.3 | 14.7 | 13.9 | 2.02 | 5.36 | 1.50 | 1.22 |
(WY) | 1964 | 1963 | 1963 | 1963 | 1963 | 1968 | 1963 | 1971 | 1963 | 1966 | 1961 | 1962 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1961 - 2004 | |||
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ANNUAL TOTAL | 12380.5 | 16577 | ||||
ANNUAL MEAN | 33.9 | 45.3 | 37.8 | |||
HIGHEST ANNUAL MEAN | 66.8 | 2002 | ||||
LOWEST ANNUAL MEAN | 6.41 | 1963 | ||||
HIGHEST DAILY MEAN | 464 | May 1 | 499 | May 31 | 824 | Oct 14 2001 |
LOWEST DAILY MEAN | 9.1 | Sep 12 | 12 | Oct 8 | 0.20 | Jul 5 1963 |
ANNUAL SEVEN-DAY MINIMUM | 9.6 | Sep 6 | 14 | Oct 5 | 0.26 | Jul 5 1963 |
MAXIMUM PEAK FLOW | 538 | May 31 | 984 A | Dec 3 1982 | ||
MAXIMUM PEAK STAGE | 8.26 | May 31 | 10.91 | Oct 14 2001 | ||
INSTANTANEOUS LOW FLOW | 9.7 | Oct 1 | 0.20 | B | ||
ANNUAL RUNOFF (CFSM) | 1.19 | 1.59 | 1.33 | |||
ANNUAL RUNOFF (INCHES) | 16.16 | 21.64 | 18.04 | |||
10 PERCENT EXCEEDS | 63 | 88 | 77 | |||
50 PERCENT EXCEEDS | 19 | 27 | 24 | |||
90 PERCENT EXCEEDS | 12 | 15 | 8.2 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |