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. | |
DRAINAGE AREA.-- 35.2 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: August 1951 to current year. | |
STAGE: Water years 1994 to current year. | |
SURFACE-WATER QUALITY | |
CHEMICAL: Water years 1977-91. | |
MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. | |
BIOLOGICAL | |
BENTHIC MACROINVERTEBRATES: Water year 2000. | |
FISH: Water year 2001. | |
HABITAT: Water year 2000. | |
REVISED RECORDS.-- WSP 1338: 1952-53. WDR IL-75-1: Drainage area. | |
GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 716.00 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
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. | |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 7.7 | 4.5 | 4.1 | 4.1 | e0.94 | e0.70 | 26 | 320 | 11 | 1.7 | 3.0 | 2.7 |
| 2 | 18 | 3.8 | 4.0 | 4.0 | e1.1 | e0.80 | 23 | 344 | 9.7 | 1.4 | 12 | 2.4 |
| 3 | 14 | 3.7 | 3.7 | 3.3 | e1.2 | e0.86 | 19 | 157 | 8.7 | 1.9 | 10 | 1.6 |
| 4 | 27 | 3.6 | 3.3 | 3.4 | e0.84 | e0.94 | 70 | 91 | 9.2 | 1.8 | 45 | 1.3 |
| 5 | 35 | 3.7 | 3.1 | 3.3 | e0.74 | e1.1 | 117 | 247 | 8.3 | 6.0 | 37 | 1.1 |
| 6 | 27 | 4.5 | 2.9 | 3.2 | e0.65 | e1.2 | 91 | 206 | 6.8 | 5.2 | 18 | 0.90 |
| 7 | 20 | 3.5 | 2.8 | 3.2 | e0.64 | e1.4 | 52 | 119 | 6.8 | 4.1 | 14 | e0.73 |
| 8 | 15 | 3.2 | 2.7 | 3.3 | e0.62 | e1.4 | 43 | 75 | 14 | 6.0 | 12 | e0.66 |
| 9 | 9.8 | 3.4 | 2.5 | 3.6 | e0.62 | e1.4 | 39 | 151 | 14 | 10 | 10 | e0.60 |
| 10 | 7.8 | 3.6 | 2.5 | 3.1 | e0.61 | e1.3 | 42 | 177 | 11 | 13 | 7.6 | 0.62 |
| 11 | 7.2 | 3.6 | 2.4 | 3.2 | e0.62 | e1.3 | 37 | 460 | 8.1 | 10 | 5.8 | 0.68 |
| 12 | 6.8 | 3.3 | 2.4 | 2.6 | e0.61 | e7.0 | 29 | 289 | 8.8 | 6.5 | 4.9 | 0.66 |
| 13 | 7.3 | 3.0 | 2.5 | 2.4 | e0.61 | e16 | 23 | 148 | 7.1 | 4.6 | 3.6 | 0.79 |
| 14 | 6.9 | 2.9 | 2.5 | 2.1 | e0.60 | e26 | 18 | 148 | 5.3 | 3.1 | 2.9 | 1.8 |
| 15 | 7.0 | 3.6 | 2.5 | 1.8 | e0.59 | e28 | 16 | 262 | 4.2 | 18 | 5.1 | 1.8 |
| 16 | 6.4 | 3.5 | 2.5 | 1.7 | e0.58 | e29 | 14 | 135 | 3.8 | 37 | 6.0 | 1.3 |
| 17 | 6.6 | 3.1 | 2.5 | 1.5 | e0.59 | e26 | 13 | 75 | 3.1 | 23 | 4.7 | 1.3 |
| 18 | 7.9 | 3.3 | 8.5 | 1.4 | e0.60 | e21 | 12 | 51 | 3.7 | 16 | 2.9 | 1.0 |
| 19 | 7.1 | 4.8 | 16 | e1.3 | e0.64 | e28 | 10 | 39 | 14 | 9.9 | 2.1 | 0.97 |
| 20 | 6.8 | 4.1 | 17 | e1.2 | e0.70 | e35 | 10 | 32 | 14 | 6.2 | 1.5 | 0.82 |
| 21 | 6.7 | 6.3 | 13 | e1.1 | e0.73 | 29 | 10 | 29 | 8.0 | 10 | 1.2 | 0.90 |
| 22 | 6.4 | 6.7 | 8.7 | e1.0 | e0.70 | 27 | 9.3 | 23 | 5.6 | 18 | e1.1 | 1.5 |
| 23 | 6.3 | 5.6 | 6.9 | e0.92 | e0.64 | 23 | 10 | 18 | 4.0 | 11 | e1.1 | 1.7 |
| 24 | 5.8 | 4.9 | 5.7 | e0.80 | e0.63 | 20 | 11 | 16 | 2.9 | 7.3 | e1.0 | 1.5 |
| 25 | 8.3 | 4.4 | 5.1 | e0.75 | e0.61 | 25 | 10 | 14 | 2.8 | 5.2 | e1.1 | 1.5 |
| 26 | 7.5 | 4.4 | 4.6 | e0.70 | e0.59 | 25 | 8.2 | 11 | 2.9 | 3.3 | 1.3 | 2.6 |
| 27 | 6.5 | 3.8 | 4.4 | e0.68 | e0.62 | 22 | 6.0 | 9.0 | 2.5 | 2.4 | 1.4 | 5.1 |
| 28 | 6.3 | 3.8 | 4.2 | e0.66 | e0.64 | 27 | 5.1 | 9.2 | 2.1 | 2.5 | 1.1 | 2.4 |
| 29 | 6.0 | 3.9 | 3.8 | e0.64 | --- | 43 | 4.1 | 10 | 1.8 | 2.2 | 1.6 | 2.0 |
| 30 | 5.4 | 3.9 | 5.1 | e0.64 | --- | 38 | 26 | 10 | 1.5 | 1.8 | 1.6 | 1.9 |
| 31 | 5.3 | --- | 4.1 | e0.72 | --- | 29 | --- | 12 | --- | 1.2 | 1.5 | --- |
| TOTAL | 321.8 | 120.4 | 156.0 | 62.31 | 19.26 | 536.40 | 803.7 | 3687.2 | 205.7 | 250.3 | 222.1 | 44.83 |
| MEAN | 10.4 | 4.01 | 5.03 | 2.01 | 0.69 | 17.3 | 26.8 | 119 | 6.86 | 8.07 | 7.16 | 1.49 |
| MAX | 35 | 6.7 | 17 | 4.1 | 1.2 | 43 | 117 | 460 | 14 | 37 | 45 | 5.1 |
| MIN | 5.3 | 2.9 | 2.4 | 0.64 | 0.58 | 0.70 | 4.1 | 9.0 | 1.5 | 1.2 | 1.0 | 0.60 |
| CFSM | 0.29 | 0.11 | 0.14 | 0.06 | 0.02 | 0.49 | 0.76 | 3.38 | 0.19 | 0.23 | 0.20 | 0.04 |
| IN. | 0.34 | 0.13 | 0.16 | 0.07 | 0.02 | 0.57 | 0.85 | 3.90 | 0.22 | 0.26 | 0.23 | 0.05 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 15.5 | 21.2 | 22.6 | 21.5 | 30.1 | 47.5 | 52.9 | 37.3 | 27.7 | 15.1 | 16.4 | 14.3 |
| 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 | 0.69 | 4.76 | 9.51 | 3.50 | 0.97 | 1.27 | 0.87 | 0.25 |
| (WY) | 1957 | 1954 | 1957 | 1959 | 2003 | 1956 | 1986 | 1989 | 1963 | 1988 | 1956 | 1956 |
| SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1951 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 11082.39 | 6430.00 | ||||
| ANNUAL MEAN | 30.4 | 17.6 | 26.8 | |||
| HIGHEST ANNUAL MEAN | 52.6 | 1993 | ||||
| LOWEST ANNUAL MEAN | 4.69 | 1963 | ||||
| HIGHEST DAILY MEAN | 546 | Jun 5 | 460 | May 11 | 861 | Feb 22 1997 |
| LOWEST DAILY MEAN | 0.72 | Aug 12 | 0.58 A | Feb 16 | 0.10 | Sep 16 1956 |
| ANNUAL SEVEN-DAY MINIMUM | 1.5 | Aug 6 | 0.60 A | Feb 12 | 0.10 | Sep 9 1958 |
| MAXIMUM PEAK FLOW | 552 | May 11 | 1180 | Feb 21 1997 | ||
| MAXIMUM PEAK STAGE | 4.30 | May 11 | 6.78 | Feb 21 1997 | ||
| INSTANTANEOUS LOW FLOW | 0.46 | Sep 11,12 | 0.00 | B | ||
| ANNUAL RUNOFF (CFSM) | 0.86 | 0.50 | 0.76 | |||
| ANNUAL RUNOFF (INCHES) | 11.71 | 6.80 | 10.35 | |||
| 10 PERCENT EXCEEDS | 65 | 29 | 65 | |||
| 50 PERCENT EXCEEDS | 9.8 | 4.4 | 11 | |||
| 90 PERCENT EXCEEDS | 2.5 | 0.74 | 1.3 | |||
B - July 10, 1957; Sept. 14, 1958; July 18, 1989; Oct. 6, 1997. |