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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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 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 | 16 | 13 | 16 | 18 | 21 | 13 | 25 | 464 | 21 | 12 | 26 | 15 |
2 | 39 | 15 | 17 | 17 | 19 | 13 | 23 | 306 | 20 | 12 | 37 | 14 |
3 | 25 | 16 | 15 | 18 | 26 | 13 | 23 | 125 | 22 | 14 | 27 | 11 |
4 | 65 | 16 | 14 | 17 | 24 | 13 | 114 | 104 | 19 | 15 | 48 | 11 |
5 | 51 | 16 | 15 | 18 | 19 | 13 | 144 | 375 | 18 | 42 | 22 | 9.4 |
6 | 28 | 14 | 15 | 19 | 17 | 13 | 71 | 150 | 18 | 34 | 33 | 9.5 |
7 | 24 | 12 | 15 | 18 | 16 | 13 | 63 | 104 | 18 | 27 | 38 | 9.9 |
8 | 19 | 11 | 15 | 18 | 23 | 14 | 61 | 89 | 58 | 25 | 23 | 9.8 |
9 | 18 | 13 | 16 | 18 | 18 | 15 | 60 | 343 | 52 | 34 | 18 | 10 |
10 | 17 | 18 | 14 | 17 | 16 | 16 | 72 | 229 | 28 | 31 | 15 | 9.4 |
11 | 16 | 17 | 18 | 17 | 14 | 14 | 54 | 156 | 24 | 19 | 14 | 9.5 |
12 | 15 | 18 | 16 | 17 | 14 | 35 | 44 | 115 | 21 | 16 | 13 | 9.1 |
13 | 15 | 18 | 14 | 17 | 14 | 43 | 37 | 93 | 20 | 14 | 12 | 12 |
14 | 16 | 16 | 15 | 16 | 14 | 30 | 35 | 96 | 20 | 13 | 13 | 27 |
15 | 17 | 19 | 16 | 16 | 13 | 30 | 31 | 145 | 20 | 84 | 13 | 21 |
16 | 15 | 17 | 15 | 15 | 13 | 29 | 29 | 85 | 18 | 42 | 12 | 14 |
17 | 13 | 17 | 15 | 15 | 14 | 28 | 27 | 67 | 15 | 33 | 13 | 13 |
18 | 16 | 18 | 46 | 15 | 13 | 25 | 25 | 55 | 19 | 51 | 12 | 13 |
19 | 15 | 23 | 46 | 15 | 13 | 24 | 26 | 46 | 36 | 23 | 11 | 12 |
20 | 14 | 18 | 28 | 14 | 13 | 37 | 30 | 41 | 20 | 18 | 11 | 12 |
21 | 14 | 17 | 25 | 13 | 13 | 31 | 27 | 36 | 16 | 35 | 10 | 13 |
22 | 14 | 18 | 23 | 12 | 13 | 26 | 26 | 31 | 15 | 20 | 11 | 16 |
23 | 14 | 17 | 21 | e15 | 14 | 23 | 23 | 29 | 15 | 15 | 10 | 14 |
24 | 15 | 17 | 21 | e15 | 14 | 21 | 21 | 26 | 14 | 14 | 9.7 | 13 |
25 | 26 | 17 | 19 | e15 | 15 | 31 | 21 | 24 | 13 | 13 | 11 | 13 |
26 | 22 | 16 | 18 | e16 | 13 | 26 | 21 | 23 | 15 | 12 | 11 | 19 |
27 | 18 | 16 | 17 | e16 | 13 | 22 | 22 | 22 | 13 | 11 | 11 | 30 |
28 | 18 | 17 | 17 | e16 | 12 | 37 | 28 | 24 | 13 | 13 | 9.7 | 17 |
29 | 15 | 17 | 17 | e15 | --- | 51 | 24 | 27 | 13 | 12 | 9.6 | 15 |
30 | 14 | 16 | 17 | e16 | --- | 33 | 92 | 23 | 12 | 11 | 9.3 | 13 |
31 | 14 | --- | 18 | e17 | --- | 27 | --- | 24 | --- | 11 | 9.6 | --- |
TOTAL | 638 | 493 | 594 | 501 | 441 | 759 | 1299 | 3477 | 626 | 726 | 522.9 | 414.6 |
MEAN | 20.6 | 16.4 | 19.2 | 16.2 | 15.8 | 24.5 | 43.3 | 112 | 20.9 | 23.4 | 16.9 | 13.8 |
MAX | 65 | 23 | 46 | 19 | 26 | 51 | 144 | 464 | 58 | 84 | 48 | 30 |
MIN | 13 | 11 | 14 | 12 | 12 | 13 | 21 | 22 | 12 | 11 | 9.3 | 9.1 |
CFSM | 0.72 | 0.58 | 0.67 | 0.57 | 0.55 | 0.86 | 1.52 | 3.94 | 0.73 | 0.82 | 0.59 | 0.48 |
IN. | 0.83 | 0.64 | 0.78 | 0.65 | 0.58 | 0.99 | 1.70 | 4.54 | 0.82 | 0.95 | 0.68 | 0.54 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 27.7 | 33.2 | 33.6 | 30.4 | 39.9 | 52.6 | 61.8 | 47.9 | 39.1 | 26.5 | 30.2 | 29.8 |
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 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1961 - 2003 | |||
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ANNUAL TOTAL | 18344 | 10491.5 | ||||
ANNUAL MEAN | 50.3 | 28.7 | 37.7 | |||
HIGHEST ANNUAL MEAN | 66.8 | 2002 | ||||
LOWEST ANNUAL MEAN | 6.41 | 1963 | ||||
HIGHEST DAILY MEAN | 607 | May 12 | 464 | May 1 | 824 | Oct 14 2001 |
LOWEST DAILY MEAN | 11 | Nov 8 | 9.1 | Sep 12 | 0.20 | Jul 5 1963 |
ANNUAL SEVEN-DAY MINIMUM | 14 | Nov 3 | 9.6 | Sep 6 | 0.26 | Jul 5 1963 |
MAXIMUM PEAK FLOW | 565 | May 1 | 984 A | Dec 3 1982 | ||
MAXIMUM PEAK STAGE | 8.47 | May 1 | 10.91 | Oct 14 2001 | ||
INSTANTANEOUS LOW FLOW | B | 0.20 | C | |||
ANNUAL RUNOFF (CFSM) | 1.76 | 1.01 | 1.32 | |||
ANNUAL RUNOFF (INCHES) | 23.94 | 13.69 | 17.96 | |||
10 PERCENT EXCEEDS | 100 | 46 | 76 | |||
50 PERCENT EXCEEDS | 26 | 17 | 24 | |||
90 PERCENT EXCEEDS | 16 | 12 | 8.1 |
B - Minimum not determined, occurred during period of ice effect. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |