LOCATION.-- Lat 42°01'34", long 88°15'20" (NAD of 1927), in SE1/4NW1/4 sec.19, T.41 N., R.9 E., Cook County, Hydrologic Unit 07120006, on right bank 35 ft upstream from bridge on U.S. Highway B.R. 20 (Villa Street) in Elgin, and at mile 2.3. |
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DRAINAGE AREA.-- 35.2 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: August 1951 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 1977-91. |
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MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. |
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BIOLOGICAL |
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BENTHIC MACROINVERTEBRATES: Water year 2000. |
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FISH: Water year 2001. |
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HABITAT: Water year 2000. |
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REVISED RECORDS.-- WSP 1338: 1952-53. WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 716.00 ft above NGVD of 1929. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,180 ft3/s, Feb. 21, 1997, gage height, 6.78 ft; no flow, July 10, 1957, Sept. 14, 1958, July 18, 1989, Oct. 6, 1997. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for those estimated daily discharges, which are poor. Effluent from sewage-treatment plants upstream averaged 43 ft3/s during the year. The maximum monthly average was 52 ft3/s in May, and the minimum was 36 ft3/s in September. |
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 | 13 | 37 | 54 | 12 | e9.0 | 22 | 25 | 31 | 11 | 2.7 | 1.7 | 13 |
2 | 11 | 30 | 40 | 10 | e8.6 | 22 | 27 | 160 | 9.2 | 2.4 | 1.5 | 24 |
3 | 11 | 27 | 32 | 9.3 | e8.6 | 27 | 29 | 129 | 10 | 2.0 | 1.2 | 35 |
4 | 13 | 23 | 29 | 8.8 | e8.7 | 32 | 27 | 66 | 287 | 1.7 | 4.1 | 34 |
5 | 34 | 23 | 27 | 8.8 | e8.8 | 22 | 23 | 43 | 546 | 1.6 | 7.1 | 25 |
6 | 28 | 22 | 26 | 8.8 | e9.0 | 21 | 20 | 33 | 305 | 1.9 | 2.7 | 18 |
7 | 22 | 21 | 24 | 8.2 | e9.9 | 26 | 23 | 28 | 156 | 2.0 | 2.1 | 13 |
8 | 16 | 18 | 23 | 7.9 | 11 | 110 | 70 | 25 | 93 | 2.2 | 1.8 | 12 |
9 | 13 | 18 | 20 | 8.2 | 14 | 187 | 188 | 28 | 57 | 10 | 1.2 | 9.1 |
10 | 13 | 17 | 16 | 8.4 | 36 | 173 | 155 | 23 | 37 | 5.3 | 1.0 | 7.6 |
11 | 19 | 14 | 14 | 8.4 | 43 | 114 | 106 | 59 | 50 | 7.0 | 0.87 | 7.2 |
12 | 39 | 13 | 16 | 8.3 | 39 | 87 | 72 | 328 | 51 | 5.8 | 0.72 | 6.4 |
13 | 141 | 12 | 44 | 8.1 | 33 | 65 | 54 | 267 | 35 | 4.6 | 77 | 6.1 |
14 | 540 | 13 | 43 | 8.1 | 28 | 49 | 44 | 152 | 28 | 3.4 | 109 | 5.7 |
15 | 442 | 13 | 36 | 8.2 | 26 | 39 | 40 | 95 | 22 | 2.3 | 62 | 5.0 |
16 | 250 | 12 | 30 | 8.3 | 24 | 34 | 37 | 111 | 18 | 1.7 | 27 | 4.4 |
17 | 164 | 11 | 30 | 7.9 | 22 | 28 | 31 | 182 | 15 | 1.5 | 17 | 4.1 |
18 | 115 | 10 | 28 | 8.2 | 20 | 24 | 27 | 124 | 13 | 2.4 | 11 | 4.3 |
19 | 73 | 11 | 29 | 8.0 | 26 | 23 | 25 | 74 | 10 | 2.4 | 8.5 | 13 |
20 | 54 | 11 | 29 | 7.6 | 92 | 24 | 24 | 53 | 9.2 | 2.1 | 6.6 | 30 |
21 | 44 | 9.7 | 26 | 7.5 | 117 | 21 | 28 | 40 | 7.9 | 1.8 | 4.6 | 32 |
22 | 42 | 9.4 | 25 | 7.4 | 82 | 18 | 33 | 32 | 7.9 | 1.7 | 313 | 34 |
23 | 239 | 9.3 | 29 | 8.4 | 58 | 17 | 29 | 28 | 7.8 | 1.4 | 518 | 28 |
24 | 326 | 17 | 26 | 9.7 | 45 | 15 | 26 | 26 | 7.2 | 1.1 | 322 | 21 |
25 | 293 | 33 | 23 | 10 | 38 | 14 | 28 | 25 | 6.1 | 1.2 | 185 | 15 |
26 | 191 | 29 | 21 | 10 | 33 | 14 | 24 | 23 | 6.1 | 1.4 | 111 | 11 |
27 | 137 | 28 | 20 | 10 | 28 | 13 | 35 | 19 | 5.5 | 2.8 | 62 | 8.6 |
28 | 102 | 25 | 19 | 10 | 25 | 12 | 57 | 17 | 4.4 | 3.1 | 41 | 7.4 |
29 | 75 | 23 | 17 | 9.9 | --- | 21 | 48 | 15 | 3.7 | 4.3 | 31 | 7.8 |
30 | 53 | 45 | 16 | 9.4 | --- | 32 | 29 | 13 | 3.2 | 2.7 | 23 | 7.5 |
31 | 44 | --- | 15 | e9.2 | --- | 28 | --- | 12 | --- | 2.0 | 15 | --- |
TOTAL | 3557 | 584.4 | 827 | 273.0 | 902.6 | 1334 | 1384 | 2261 | 1822.2 | 88.5 | 1969.69 | 449.2 |
MEAN | 114.7 | 19.48 | 26.68 | 8.806 | 32.24 | 43.03 | 46.13 | 72.94 | 60.74 | 2.855 | 63.54 | 14.97 |
MAX | 540 | 45 | 54 | 12 | 117 | 187 | 188 | 328 | 546 | 10 | 518 | 35 |
MIN | 11 | 9.3 | 14 | 7.4 | 8.6 | 12 | 20 | 12 | 3.2 | 1.1 | 0.72 | 4.1 |
CFSM | 3.26 | 0.55 | 0.76 | 0.25 | 0.92 | 1.22 | 1.31 | 2.07 | 1.73 | 0.08 | 1.81 | 0.43 |
IN. | 3.76 | 0.62 | 0.87 | 0.29 | 0.95 | 1.41 | 1.46 | 2.39 | 1.93 | 0.09 | 2.08 | 0.47 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 15.55 | 21.58 | 22.94 | 21.86 | 30.66 | 48.11 | 53.44 | 35.75 | 28.13 | 15.21 | 16.54 | 14.52 |
MAX | 115 | 133 | 113 | 85.1 | 129 | 235 | 146 | 130 | 102 | 92.4 | 103 | 94.6 |
(WY) | 2002 | 1986 | 1983 | 1993 | 1997 | 1979 | 1983 | 1974 | 1996 | 1993 | 1990 | 1972 |
MIN | 0.50 | 0.25 | 0.60 | 0.91 | 0.72 | 4.76 | 9.51 | 3.50 | 0.97 | 1.27 | 0.87 | 0.25 |
(WY) | 1957 | 1954 | 1957 | 1959 | 1978 | 1956 | 1986 | 1989 | 1963 | 1988 | 1956 | 1956 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1951 - 2002 | |||
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ANNUAL TOTAL | 14628.81 | 15452.59 | ||||
ANNUAL MEAN | 40.08 | 42.34 | 26.99 | |||
HIGHEST ANNUAL MEAN | 52.6 | 1993 | ||||
LOWEST ANNUAL MEAN | 4.69 | 1963 | ||||
HIGHEST DAILY MEAN | 540 | Oct 14 | 546 | Jun 5 | 861 | Feb 22 1997 |
LOWEST DAILY MEAN | 0.93 | Jul 14 | 0.72 | Aug 12 | 0.10 | Sep 16 1956 |
ANNUAL SEVEN-DAY MINIMUM | 1.2 | Jul 11 | 1.5 | Aug 6 | 0.10 | Sep 9 1958 |
MAXIMUM PEAK FLOW | 637 | Oct 14 | 1180 | Feb 21 1997 | ||
MAXIMUM PEAK STAGE | 4.67 | Oct 14 | 6.78 | Feb 21 1997 | ||
INSTANTANEOUS LOW FLOW | 0.62 | Aug 12 | 0.00 | A | ||
ANNUAL RUNOFF (CFSM) | 1.14 | 1.20 | 0.77 | |||
ANNUAL RUNOFF (INCHES) | 15.46 | 16.33 | 10.42 | |||
10 PERCENT EXCEEDS | 73 | 107 | 65 | |||
50 PERCENT EXCEEDS | 22 | 22 | 11 | |||
90 PERCENT EXCEEDS | 4.2 | 3.6 | 1.3 |
A - July 10, 1957; Sept. 14, 1958; July 18, 1989; Oct. 6, 1997. |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |