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 | |
ALGAE: Pigment and biomass, Water year 2000. | |
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 2003 TO SEPTEMBER 2004
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 2.0 | 7.8 | 12 | 11 | 3.5 | 24 | 92 | 16 | 216 | 6.4 | 3.2 | 7.5 |
| 2 | 2.0 | 26 | 11 | 10 | 3.5 | 31 | 65 | 15 | 111 | 6.7 | 3.2 | 5.5 |
| 3 | 3.0 | 132 | 9.3 | 11 | 3.6 | 30 | 46 | 13 | 64 | 6.9 | 7.0 | 4.1 |
| 4 | 4.5 | 149 | 8.9 | 11 | 3.7 | 33 | 36 | 11 | 40 | 9.5 | 48 | 3.4 |
| 5 | 2.6 | 138 | 13 | e10 | 3.8 | 249 | 30 | 9.6 | 31 | 7.3 | 34 | 2.7 |
| 6 | 2.3 | 106 | 15 | e9.6 | 3.9 | 289 | 25 | 8.2 | 24 | 6.6 | 16 | 2.3 |
| 7 | 2.0 | 51 | 13 | e8.8 | 4.0 | 167 | 24 | 7.7 | 20 | 6.0 | 9.8 | 2.1 |
| 8 | 1.8 | 30 | 12 | 8.3 | 4.1 | 119 | 24 | 7.0 | 15 | 5.6 | 7.3 | 1.8 |
| 9 | 1.8 | 21 | 14 | 7.7 | 4.1 | 79 | 20 | 6.2 | 11 | 5.7 | 5.8 | 1.8 |
| 10 | 2.0 | 16 | 123 | 7.1 | 4.0 | 53 | 18 | 14 | 37 | 11 | 4.8 | 1.6 |
| 11 | 1.8 | 14 | 169 | 7.0 | 3.8 | 42 | 16 | 27 | 109 | 12 | 4.3 | 1.9 |
| 12 | 3.1 | 13 | 108 | 7.1 | 3.6 | 33 | 14 | 20 | 305 | 9.0 | 3.9 | 2.0 |
| 13 | 4.3 | 11 | 58 | 7.3 | 3.7 | 28 | 13 | 39 | 282 | 7.2 | 3.8 | 1.7 |
| 14 | 22 | 9.1 | 38 | 7.2 | 3.5 | 29 | 12 | 102 | 132 | 6.5 | 3.9 | 2.2 |
| 15 | 18 | 8.3 | 27 | 6.9 | 3.5 | 27 | 12 | 138 | 72 | 9.1 | 3.6 | 3.8 |
| 16 | 17 | 8.0 | 22 | 6.3 | 3.4 | 24 | 11 | 66 | 44 | 7.5 | 3.1 | 4.7 |
| 17 | 9.5 | 7.7 | 19 | e6.0 | 3.3 | 23 | 10 | 35 | 32 | 6.0 | 3.1 | 3.8 |
| 18 | 6.8 | 69 | 15 | e5.8 | 3.2 | 24 | 9.5 | 83 | 25 | 5.3 | 3.2 | 3.2 |
| 19 | 5.2 | 124 | 13 | e5.5 | 3.4 | 27 | 9.5 | 77 | 19 | 4.6 | 6.1 | 2.7 |
| 20 | 5.2 | 82 | 11 | 5.3 | 9.7 | 28 | 11 | 47 | 15 | 4.2 | 3.9 | 2.3 |
| 21 | 4.6 | 46 | 10 | 5.0 | 24 | 24 | 23 | 68 | 25 | 4.8 | 3.4 | 2.2 |
| 22 | 4.4 | 32 | 9.5 | 5.1 | 25 | 20 | 18 | 277 | 47 | 9.7 | 3.2 | 3.2 |
| 23 | 4.2 | 29 | 9.3 | 4.1 | 34 | 18 | 15 | 275 | 30 | 9.4 | 3.1 | 3.5 |
| 24 | 4.8 | 47 | 8.9 | 4.3 | 41 | 46 | 13 | 155 | 19 | 6.6 | 3.6 | 2.4 |
| 25 | 7.2 | 37 | 7.9 | 4.3 | 36 | 63 | 25 | 94 | 17 | 5.2 | 4.9 | 3.1 |
| 26 | 8.1 | 27 | 7.7 | 4.3 | 32 | 111 | 23 | 59 | 13 | 4.5 | 4.4 | 4.4 |
| 27 | 7.4 | 24 | 7.4 | 4.3 | 26 | 115 | 17 | 41 | 11 | 3.9 | 7.8 | 3.5 |
| 28 | 7.9 | 20 | 13 | 4.3 | 22 | 107 | 14 | 31 | 9.8 | 3.5 | 49 | 3.4 |
| 29 | 7.3 | 16 | 16 | 4.1 | 21 | 306 | 12 | 23 | 8.4 | 3.4 | 40 | 3.0 |
| 30 | 7.0 | 14 | 14 | 3.8 | --- | 208 | 13 | 107 | 7.2 | 3.2 | 18 | 3.6 |
| 31 | 8.2 | --- | 12 | 3.6 | --- | 137 | --- | 314 | --- | 3.5 | 11 | --- |
| TOTAL | 188.0 | 1314.9 | 826.9 | 206.1 | 340.3 | 2514 | 671.0 | 2185.7 | 1791.4 | 200.8 | 326.4 | 93.4 |
| MEAN | 6.06 | 43.8 | 26.7 | 6.65 | 11.7 | 81.1 | 22.4 | 70.5 | 59.7 | 6.48 | 10.5 | 3.11 |
| MAX | 22 | 149 | 169 | 11 | 41 | 306 | 92 | 314 | 305 | 12 | 49 | 7.5 |
| MIN | 1.8 | 7.7 | 7.4 | 3.6 | 3.2 | 18 | 9.5 | 6.2 | 7.2 | 3.2 | 3.1 | 1.6 |
| CFSM | 0.17 | 1.25 | 0.76 | 0.19 | 0.33 | 2.30 | 0.64 | 2.00 | 1.70 | 0.18 | 0.30 | 0.09 |
| IN. | 0.20 | 1.39 | 0.87 | 0.22 | 0.36 | 2.66 | 0.71 | 2.31 | 1.89 | 0.21 | 0.34 | 0.10 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2004, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 15.3 | 21.7 | 22.7 | 21.2 | 29.7 | 48.2 | 52.4 | 38.0 | 28.3 | 14.9 | 16.2 | 14.1 |
| 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 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1951 - 2004 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 8161.60 | 10658.9 | ||||
| ANNUAL MEAN | 22.4 | 29.1 | 26.9 | |||
| HIGHEST ANNUAL MEAN | 52.6 | 1993 | ||||
| LOWEST ANNUAL MEAN | 4.69 | 1963 | ||||
| HIGHEST DAILY MEAN | 460 | May 11 | 314 | May 31 | 861 | Feb 22 1997 |
| LOWEST DAILY MEAN | 0.58 A | Feb 16 | 1.6 | Sep 10 | 0.10 | Sep 16 1956 |
| ANNUAL SEVEN-DAY MINIMUM | 0.60 A | Feb 12 | 1.8 | Sep 7 | 0.10 | Sep 9 1958 |
| MAXIMUM PEAK FLOW | 367 | Mar 6 | 1180 | Feb 21 1997 | ||
| MAXIMUM PEAK STAGE | 3.54 | Mar 6 | 6.78 | Feb 21 1997 | ||
| INSTANTANEOUS LOW FLOW | 1.1 | Sep 10 | 0.00 | B | ||
| ANNUAL RUNOFF (CFSM) | 0.635 | 0.827 | 0.763 | |||
| ANNUAL RUNOFF (INCHES) | 8.63 | 11.26 | 10.37 | |||
| 10 PERCENT EXCEEDS | 45 | 78 | 65 | |||
| 50 PERCENT EXCEEDS | 7.1 | 10 | 11 | |||
| 90 PERCENT EXCEEDS | 0.74 | 3.2 | 1.3 | |||
B - July 10, 1957; Sept. 14, 1958; July 18, 1989; Oct. 6, 1997. |