LOCATION.-- Lat 41°44'20", long 87°53'47" (NAD of 1927), in SE1/4NE1/4 sec.31, T.38 N., R.12 E., Cook County, Hydrologic Unit 07120004, on left bank at upstream side of bridge on German Church Road, 1.1 mi northwest of Willow Springs, and at mile 2.2. |
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DRAINAGE AREA.-- 16.5 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: July 1951 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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MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. |
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BIOLOGICAL |
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ALGAE: Pigment and biomass, Water year 2000. |
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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.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 606.36 ft above NGVD of 1929. Prior to June 17, 1963, water-stage recorder at same site at datum 3.73 ft higher. June 17, 1963, to June 26, 1964, nonrecording gage at site 0.5 mi upstream at datum 4.82 ft higher. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,680 ft3/s, Sept. 14, 1961, gage height, 13.71 ft, present datum; minimum daily, 0.1 ft3/s, Dec. 9, 1957. |
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REMARKS FOR CURRENT YEAR.-- Records good except those greater than 100 ft3/s, which are fair. Effluent from sewage-treatment plant 2 mi. upstream averaged 18.0 ft3/s during the year. The maximum monthly average was 25 ft3/s in March, and the minimum was 13.4 ft3/s in September. |
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 | 11 | 16 | 14 | 12 | 35 | 32 | 22 | 82 | 15 | 13 | 22 |
2 | 12 | 36 | 15 | 14 | 13 | 33 | 28 | 19 | 60 | 15 | 13 | 18 |
3 | 17 | 141 | 16 | 16 | 13 | 26 | 25 | 19 | 39 | 31 | 17 | 16 |
4 | 14 | 130 | 19 | 14 | 13 | 69 | 22 | 18 | 27 | 32 | 63 | 16 |
5 | 12 | 252 | 63 | 18 | 13 | 296 | 22 | 17 | 24 | 20 | 20 | 14 |
6 | 11 | 61 | 37 | 15 | 14 | 92 | 18 | 17 | 21 | 38 | 17 | 14 |
7 | 12 | 34 | 27 | 14 | 14 | 51 | 19 | 18 | 20 | 31 | 15 | 14 |
8 | 12 | 26 | 23 | 14 | 13 | 38 | 19 | 17 | 19 | 21 | 14 | 13 |
9 | 12 | 21 | 36 | 13 | 14 | 32 | 18 | 17 | 18 | 25 | 13 | 13 |
10 | 11 | 19 | 154 | 13 | 13 | 28 | 18 | 18 | 78 | 51 | 12 | 8.3 |
11 | 12 | 20 | 71 | 13 | 13 | 26 | 17 | 16 | 144 | 23 | 14 | 13 |
12 | 12 | 19 | 39 | 16 | 14 | 22 | 17 | 25 | 201 | 21 | 11 | 12 |
13 | 11 | 17 | 31 | 16 | 14 | 20 | 17 | 47 | 63 | 18 | 13 | 14 |
14 | 55 | 17 | 26 | 15 | 13 | 27 | 18 | 112 | 47 | 17 | 12 | 10 |
15 | 22 | 17 | 24 | 15 | 13 | 20 | 17 | 45 | 33 | 15 | 12 | 14 |
16 | 16 | 18 | 23 | 14 | 13 | 21 | 17 | 28 | 26 | 15 | 13 | 20 |
17 | 15 | 17 | 20 | 15 | 13 | 22 | 20 | 24 | 23 | 14 | 14 | 14 |
18 | 13 | 225 | 20 | 15 | 14 | 26 | 16 | 33 | 20 | 13 | 15 | 12 |
19 | 12 | 172 | 19 | 13 | 16 | 25 | 16 | 23 | 20 | 14 | 15 | 12 |
20 | 13 | 43 | 17 | 13 | 51 | 29 | 33 | 20 | 18 | 14 | 13 | 13 |
21 | 13 | 28 | 16 | 12 | 41 | 23 | 37 | 25 | 35 | 19 | 12 | 13 |
22 | 13 | 22 | 17 | 12 | 32 | 22 | 22 | 59 | 27 | 21 | 12 | 13 |
23 | 13 | 60 | 17 | 12 | 39 | 19 | 20 | 49 | 20 | 16 | 12 | 13 |
24 | 14 | 79 | 16 | 12 | 35 | 35 | 19 | 27 | 21 | 14 | 40 | 12 |
25 | 36 | 37 | 15 | 12 | 31 | 28 | 51 | 29 | 19 | 13 | 34 | 12 |
26 | 16 | 30 | 14 | 12 | 27 | 62 | 26 | 22 | 16 | 13 | 35 | 11 |
27 | 15 | e26 | 14 | 12 | 25 | 42 | 21 | 20 | 15 | 13 | 47 | 12 |
28 | 15 | e20 | 20 | 12 | 23 | 88 | 21 | 18 | 17 | 13 | 338 | 13 |
29 | 14 | e18 | 18 | 13 | 22 | 131 | 18 | 16 | 15 | 13 | 89 | 13 |
30 | 14 | e16 | 16 | 13 | --- | 57 | 23 | 175 | 15 | 15 | 41 | 13 |
31 | 12 | --- | 15 | 12 | --- | 39 | --- | 190 | --- | 13 | 27 | --- |
TOTAL | 482 | 1632 | 874 | 424 | 581 | 1484 | 667 | 1185 | 1183 | 606 | 1016 | 407.3 |
MEAN | 15.5 | 54.4 | 28.2 | 13.7 | 20.0 | 47.9 | 22.2 | 38.2 | 39.4 | 19.5 | 32.8 | 13.6 |
MAX | 55 | 252 | 154 | 18 | 51 | 296 | 51 | 190 | 201 | 51 | 338 | 22 |
MIN | 11 | 11 | 14 | 12 | 12 | 19 | 16 | 16 | 15 | 13 | 11 | 8.3 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 16.0 | 19.9 | 19.3 | 18.3 | 22.3 | 32.0 | 35.4 | 27.9 | 21.8 | 18.3 | 18.0 | 17.1 |
MAX | 100 | 69.6 | 86.6 | 59.8 | 98.8 | 110 | 95.0 | 90.9 | 68.1 | 67.7 | 66.8 | 106 |
(WY) | 1955 | 1991 | 1983 | 1993 | 1997 | 1979 | 1983 | 1996 | 1993 | 1996 | 1987 | 1961 |
MIN | 2.30 | 2.37 | 2.83 | 2.44 | 4.05 | 5.88 | 7.00 | 4.94 | 5.64 | 4.94 | 4.65 | 3.01 |
(WY) | 1954 | 1954 | 1959 | 1956 | 1963 | 1957 | 1971 | 1958 | 1956 | 1952 | 1953 | 1954 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1951 - 2004 | |||
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ANNUAL TOTAL | 10088.8 | 10541.3 | ||||
ANNUAL MEAN | 27.6 | 28.8 | 22.2 | |||
HIGHEST ANNUAL MEAN | 39.6 | 1983 | ||||
LOWEST ANNUAL MEAN | 7.79 | 1953 | ||||
HIGHEST DAILY MEAN | 283 | May 9 | 338 | Aug 28 | 1040 | Jul 18 1996 |
LOWEST DAILY MEAN | 9.8 | Jan 21 | 8.3 | Sep 10 | 0.10 | Dec 9 1957 |
ANNUAL SEVEN-DAY MINIMUM | 12 | Oct 5 | 12 | Oct 5 | 1.0 | Feb 3 1959 |
MAXIMUM PEAK FLOW | 790 | Aug 28 | 2680 | Sep 14 1961 | ||
MAXIMUM PEAK STAGE | 7.82 | Aug 28 | 13.71 A | Sep 14 1961 | ||
INSTANTANEOUS LOW FLOW | 1.7 | Sep 10 | ||||
10 PERCENT EXCEEDS | 47 | 50 | 41 | |||
50 PERCENT EXCEEDS | 17 | 18 | 14 | |||
90 PERCENT EXCEEDS | 12 | 12 | 4.5 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |