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: 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 (717.50 ft NAVD 1988). |
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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 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 | 14 | 58 | 76 | 22 | 21 | 65 | 49 | 28 | 12 | 14 | 11 | 9.2 |
2 | 19 | 78 | 55 | 77 | 22 | 53 | 119 | 26 | 14 | 11 | 11 | 9.4 |
3 | 16 | 40 | 44 | 67 | 22 | 47 | 75 | 23 | 13 | 11 | 11 | 9.4 |
4 | 15 | 76 | 38 | 69 | 25 | 40 | 58 | 23 | 19 | 12 | 11 | 8.6 |
5 | 14 | 49 | 39 | 51 | 44 | 39 | 48 | 23 | 20 | 16 | 11 | 8.4 |
6 | 14 | 35 | 52 | 47 | 75 | 39 | 46 | 23 | 15 | 12 | 10 | 9.9 |
7 | 13 | 29 | 154 | 41 | 136 | 42 | 41 | 22 | 14 | 12 | 11 | 9.1 |
8 | 62 | 26 | 112 | 36 | 107 | 38 | 37 | 22 | 12 | 10 | 11 | 18 |
9 | 38 | 26 | 77 | 34 | 81 | 33 | 35 | 22 | 13 | 10 | 11 | 10 |
10 | 19 | 26 | 60 | 33 | 67 | 34 | 32 | 24 | 13 | 9.5 | 12 | 9.4 |
11 | 17 | 22 | 55 | 40 | 56 | 36 | 31 | 38 | 13 | 8.9 | 14 | 10 |
12 | 16 | 19 | 47 | 124 | 52 | 34 | 88 | 29 | 13 | 8.5 | 61 | 11 |
13 | 14 | 23 | 40 | 440 | 71 | 32 | 100 | 28 | 13 | 8.6 | 27 | 9.4 |
14 | 15 | 20 | 32 | 196 | 163 | 29 | 64 | 26 | 15 | 9.6 | 16 | 11 |
15 | 15 | 19 | 29 | 100 | 116 | 27 | 50 | 24 | 12 | 8.3 | 14 | 9.9 |
16 | 14 | 17 | 30 | 80 | 100 | 27 | 43 | 22 | 12 | 8.7 | 14 | 23 |
17 | 14 | 17 | 29 | 63 | 79 | 26 | 41 | 22 | 11 | 7.9 | 12 | 13 |
18 | 15 | 17 | 28 | 52 | 63 | 26 | 38 | 19 | 12 | 9.3 | 16 | 12 |
19 | 14 | 48 | 26 | 45 | 54 | 29 | 36 | 87 | 12 | 7.9 | 21 | 19 |
20 | 14 | 37 | 25 | 41 | 62 | 28 | 37 | 47 | 11 | 14 | 119 | 17 |
21 | 14 | 27 | 23 | 40 | 78 | 28 | 32 | 29 | 10 | 16 | 43 | 13 |
22 | 13 | 25 | 21 | 37 | 62 | 26 | 68 | 23 | 11 | 11 | 21 | 14 |
23 | 77 | 23 | 19 | 36 | 52 | 27 | 76 | 20 | 11 | 9.5 | 15 | 26 |
24 | 37 | 24 | 19 | 33 | 46 | 25 | 52 | 18 | 11 | 11 | 11 | 16 |
25 | 24 | 38 | 18 | 33 | 43 | 40 | 42 | 17 | 10 | 14 | 12 | 21 |
26 | 20 | 38 | 17 | 29 | 41 | 38 | 38 | 16 | 11 | 34 | 10 | 24 |
27 | 18 | 120 | 17 | 27 | 39 | 34 | 34 | 15 | 14 | 38 | 10 | 15 |
28 | 17 | 100 | 18 | 25 | 79 | 31 | 32 | 16 | 13 | 16 | 10 | 16 |
29 | 40 | 59 | 18 | 24 | --- | 30 | 30 | 15 | 15 | 12 | 10 | 31 |
30 | 34 | 51 | 17 | 23 | --- | 33 | 29 | 14 | 16 | 11 | 8.9 | 15 |
31 | 25 | --- | 24 | 23 | --- | 66 | --- | 14 | --- | 13 | 9.4 | --- |
TOTAL | 691 | 1187 | 1259 | 1988 | 1856 | 1102 | 1501 | 775 | 391 | 394.7 | 584.3 | 427.7 |
MEAN | 22.3 | 39.6 | 40.6 | 64.1 | 66.3 | 35.5 | 50.0 | 25.0 | 13.0 | 12.7 | 18.8 | 14.3 |
MAX | 77 | 120 | 154 | 440 | 163 | 66 | 119 | 87 | 20 | 38 | 119 | 31 |
MIN | 13 | 17 | 17 | 22 | 21 | 25 | 29 | 14 | 10 | 7.9 | 8.9 | 8.4 |
CFSM | 0.78 | 1.39 | 1.43 | 2.25 | 2.33 | 1.25 | 1.76 | 0.88 | 0.46 | 0.45 | 0.66 | 0.50 |
IN. | 0.90 | 1.55 | 1.64 | 2.59 | 2.42 | 1.44 | 1.96 | 1.01 | 0.51 | 0.52 | 0.76 | 0.56 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 27.4 | 33.7 | 34.1 | 31.0 | 40.3 | 53.0 | 60.9 | 48.5 | 39.5 | 26.1 | 29.9 | 29.1 |
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 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1961 - 2005 | |||
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ANNUAL TOTAL | 16100 | 12156.7 | ||||
ANNUAL MEAN | 44.0 | 33.3 | 37.7 | |||
HIGHEST ANNUAL MEAN | 66.8 | 2002 | ||||
LOWEST ANNUAL MEAN | 6.41 | 1963 | ||||
HIGHEST DAILY MEAN | 499 | May 31 | 440 | Jan 13 | 824 | Oct 14 2001 |
LOWEST DAILY MEAN | 13 | Sep 14,Oct 7, 22 | 7.9 | Jul 17,19 | 0.20 | Jul 5 1963 |
ANNUAL SEVEN-DAY MINIMUM | 14 | Sep 21 | 8.6 | Jul 13 | 0.26 | Jul 5 1963 |
MAXIMUM PEAK FLOW | 495 | Jan 13 | 984 A | Dec 3 1982 | ||
MAXIMUM PEAK STAGE | 8.12 | Jan 13 | 10.91 | Oct 14 2001 | ||
INSTANTANEOUS LOW FLOW | 3.6 | Jul 17 | 0.20 | B | ||
ANNUAL RUNOFF (CFSM) | 1.54 | 1.17 | 1.32 | |||
ANNUAL RUNOFF (INCHES) | 21.01 | 15.87 | 17.99 | |||
10 PERCENT EXCEEDS | 85 | 67 | 76 | |||
50 PERCENT EXCEEDS | 26 | 24 | 24 | |||
90 PERCENT EXCEEDS | 15 | 11 | 8.4 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |