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 1994-2002. |
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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 poor. |
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 33 | 54 | 82 | 21 | 47 | 46 | 37 | 38 | 22 | 22 | 22 | 19 |
2 | 31 | 52 | 56 | 20 | 44 | 52 | 54 | 118 | 19 | 21 | 24 | 51 |
3 | 32 | 48 | 45 | 21 | 38 | 61 | 40 | 57 | 24 | 19 | 22 | 43 |
4 | 37 | 46 | 39 | 19 | 36 | 53 | 33 | 45 | 466 | 20 | 33 | 26 |
5 | 168 | 43 | 39 | 21 | 31 | 44 | 32 | 39 | 562 | 18 | 94 | 22 |
6 | 74 | 41 | 34 | 22 | 28 | 51 | 37 | 37 | 248 | 18 | 36 | 21 |
7 | 56 | 45 | 33 | 22 | 29 | 88 | 59 | 32 | 168 | 18 | 28 | 20 |
8 | 48 | 49 | 27 | 20 | 36 | 268 | 175 | 29 | 126 | 18 | 25 | 20 |
9 | 40 | 41 | 24 | 22 | 55 | 311 | 317 | 53 | 100 | 147 | 21 | 19 |
10 | 47 | 36 | 21 | 23 | 128 | 165 | 139 | 34 | 87 | 38 | 20 | 19 |
11 | 71 | 34 | 16 | 23 | 100 | 108 | 102 | 131 | 118 | 31 | 18 | 21 |
12 | 143 | 33 | 17 | 23 | 82 | 87 | 82 | 607 | 93 | 24 | 17 | 18 |
13 | 326 | 29 | 99 | 25 | 71 | 71 | 67 | 299 | 77 | 19 | 107 | 15 |
14 | 824 | 38 | 48 | 25 | 60 | 60 | 54 | 159 | 81 | 18 | 238 | 15 |
15 | 483 | 36 | 35 | 25 | 57 | 54 | 49 | 112 | 72 | 16 | 88 | 16 |
16 | 282 | 31 | 34 | 25 | 55 | 40 | 40 | 168 | 54 | 17 | 61 | 16 |
17 | 192 | 29 | 43 | 25 | 50 | 35 | 39 | 195 | 46 | 16 | 46 | 14 |
18 | 149 | 29 | 35 | 24 | 46 | 32 | 35 | 113 | 40 | 17 | 34 | 16 |
19 | 116 | 35 | 39 | 24 | 75 | 27 | 32 | 90 | 35 | 16 | 32 | 27 |
20 | 93 | 30 | 37 | 24 | 255 | 27 | 41 | 75 | 33 | 15 | 25 | 61 |
21 | 81 | 27 | 28 | 25 | 173 | 25 | 67 | 59 | 33 | 16 | 18 | 46 |
22 | 82 | 27 | 34 | 26 | 110 | 23 | 76 | 48 | 30 | 18 | 480 | 83 |
23 | 486 | 24 | 67 | 31 | 90 | 22 | 45 | 44 | 28 | 16 | 463 | 40 |
24 | 400 | 53 | 44 | 34 | 77 | 22 | 48 | 51 | 28 | 14 | 188 | 26 |
25 | 336 | 73 | 35 | 33 | 67 | 19 | 56 | 54 | 25 | 16 | 128 | 20 |
26 | 181 | 46 | 30 | 33 | 60 | 19 | 38 | 43 | 25 | 17 | 99 | 19 |
27 | 137 | 41 | 29 | 33 | 57 | 17 | 55 | 36 | 24 | 26 | 78 | 18 |
28 | 117 | 38 | 27 | 34 | 50 | 17 | 101 | 33 | 24 | 26 | 56 | 16 |
29 | 98 | 42 | 24 | 31 | --- | 56 | 59 | 28 | 23 | 48 | 36 | 19 |
30 | 82 | 117 | 24 | 27 | --- | 62 | 44 | 27 | 23 | 31 | 27 | 19 |
31 | 65 | --- | 24 | 36 | --- | 39 | --- | 24 | --- | 23 | 21 | --- |
TOTAL | 5310 | 1267 | 1169 | 797 | 2007 | 2001 | 2053 | 2878 | 2734 | 779 | 2585 | 785 |
MEAN | 171.3 | 42.23 | 37.71 | 25.71 | 71.68 | 64.55 | 68.43 | 92.84 | 91.13 | 25.13 | 83.39 | 26.17 |
MAX | 824 | 117 | 99 | 36 | 255 | 311 | 317 | 607 | 562 | 147 | 480 | 83 |
MIN | 31 | 24 | 16 | 19 | 28 | 17 | 32 | 24 | 19 | 14 | 17 | 14 |
CFSM | 6.01 | 1.48 | 1.32 | 0.90 | 2.52 | 2.26 | 2.40 | 3.26 | 3.20 | 0.88 | 2.93 | 0.92 |
IN. | 6.93 | 1.65 | 1.53 | 1.04 | 2.62 | 2.61 | 2.68 | 3.76 | 3.57 | 1.02 | 3.37 | 1.02 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 27.92 | 33.56 | 33.90 | 30.73 | 40.45 | 53.31 | 62.20 | 46.30 | 39.56 | 26.61 | 30.53 | 30.17 |
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 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1961 - 2002 | |||
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ANNUAL TOTAL | 23524.6 | 24365 | ||||
ANNUAL MEAN | 64.45 | 66.75 | 37.89 | |||
HIGHEST ANNUAL MEAN | 66.8 | 2002 | ||||
LOWEST ANNUAL MEAN | 6.41 | 1963 | ||||
HIGHEST DAILY MEAN | 824 | Oct 14 | 824 | Oct 14 | 824 | Oct 14 2001 |
LOWEST DAILY MEAN | 9.7 | Jul 13 | 14 | Jul 24,Sep 17 | 0.20 | Jul 5 1963 |
ANNUAL SEVEN-DAY MINIMUM | 13 | Jul 10 | 16 | Sep 12 | 0.26 | Jul 5 1963 |
MAXIMUM PEAK FLOW | 913 | Oct 14 | 984 A | Dec 3 1982 | ||
MAXIMUM PEAK STAGE | 10.91 | Oct 14 | 10.91 | Oct 14 2001 | ||
INSTANTANEOUS LOW FLOW | 6.5 | Jan 11 | 0.20 | B | ||
ANNUAL RUNOFF (CFSM) | 2.26 | 2.34 | 1.33 | |||
ANNUAL RUNOFF (INCHES) | 30.71 | 31.80 | 18.06 | |||
10 PERCENT EXCEEDS | 117 | 129 | 77 | |||
50 PERCENT EXCEEDS | 36 | 37 | 24 | |||
90 PERCENT EXCEEDS | 17 | 19 | 8.0 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |