LOCATION.-- Lat 42°09'06", long 87°57'26" (NAD of 1927), in NE1/4NW1/4 sec.4, T.42 N., R.11 E., Cook County, Hydrologic Unit 07120004, on left bank at downstream side of bridge on Short Aptakisic Road, 1.0 mi downstream from unnamed tributary, 2.5 mi west of Wheeling, and at mile 5.0. | |
DRAINAGE AREA.-- 19.6 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: August 1952 to current year. | |
STAGE: Water years 1994 to current year. | |
REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-94-2: 1986-93 (P), 1993. | |
GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 658.60 ft above NGVD of 1929 (Cook County Highway Department bench mark). | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 887 ft3/s, July 22, 1982, gage height, 7.94 ft; no flow at times in several years. | |
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 | 0.95 | 4.5 | 8.2 | 9.3 | e4.7 | 36 | 49 | 13 | 173 | 4.1 | 1.0 | 5.6 |
| 2 | 0.90 | 41 | 8.1 | 8.6 | e3.9 | 40 | 40 | 11 | 137 | 3.5 | 0.92 | 4.2 |
| 3 | 5.0 | 125 | 7.1 | 8.0 | e3.8 | 34 | 33 | 9.1 | 70 | 48 | 15 | 3.0 |
| 4 | 2.1 | 105 | 6.3 | 8.0 | e4.6 | 43 | 28 | 8.6 | 41 | 95 | 55 | 2.4 |
| 5 | 2.4 | 113 | 13 | 8.9 | e4.0 | 190 | 25 | 7.2 | 29 | 38 | 24 | 2.1 |
| 6 | 1.9 | 74 | 12 | 12 | e3.7 | 184 | 23 | 7.5 | 21 | 23 | 13 | 1.6 |
| 7 | 1.4 | 42 | 11 | 10 | e4.2 | 153 | 20 | 7.4 | 16 | 16 | 7.2 | 1.2 |
| 8 | 0.78 | 27 | 9.6 | e9.0 | e4.8 | 86 | 18 | 6.4 | 13 | 13 | 4.8 | 0.99 |
| 9 | 0.47 | 19 | 18 | e7.0 | e4.5 | 54 | 16 | 6.5 | 11 | 16 | 3.5 | 0.68 |
| 10 | 0.59 | 13 | 109 | e6.2 | e3.7 | 42 | 15 | 11 | 43 | 58 | 2.4 | 0.53 |
| 11 | 0.72 | 10 | 114 | e5.5 | e3.8 | 35 | 13 | 7.4 | 62 | 37 | 1.9 | 1.1 |
| 12 | 1.2 | 8.9 | 69 | e5.1 | e3.7 | 28 | 11 | 11 | 79 | 23 | 1.8 | 1.5 |
| 13 | 1.0 | 6.2 | 40 | e5.2 | e3.6 | 26 | 10 | 19 | 62 | 14 | 1.8 | 0.74 |
| 14 | 20 | 5.0 | 30 | e5.4 | e3.8 | 28 | 9.8 | 55 | 43 | 9.9 | 1.6 | 1.2 |
| 15 | 13 | 4.8 | 23 | e5.0 | e3.7 | 26 | 9.4 | 63 | 31 | 7.8 | 1.2 | 0.56 |
| 16 | 6.0 | 4.6 | 19 | e5.1 | e3.6 | 26 | 9.0 | 37 | 22 | 5.9 | 0.99 | 1.3 |
| 17 | 4.2 | 4.5 | 16 | 5.7 | e3.6 | 25 | 12 | 28 | 16 | 4.9 | 1.2 | 0.72 |
| 18 | 2.9 | 78 | 13 | 6.3 | e3.7 | 26 | 11 | 111 | 13 | 4.4 | 0.76 | 0.91 |
| 19 | 2.2 | 89 | 11 | 6.8 | 6.7 | 27 | 8.5 | 112 | 11 | 3.5 | 0.68 | 0.74 |
| 20 | 1.9 | 53 | 10 | 6.2 | 22 | 26 | 13 | 111 | 8.8 | 3.2 | 0.42 | 0.48 |
| 21 | 1.1 | 36 | 8.8 | 5.9 | 28 | 23 | 18 | 165 | 31 | 4.0 | 0.37 | 0.37 |
| 22 | 1.0 | 29 | 7.6 | e5.2 | 27 | 22 | 14 | 187 | 44 | 4.7 | 0.37 | 0.42 |
| 23 | 1.1 | 27 | 8.0 | e4.7 | 39 | 19 | 14 | 190 | 29 | 3.6 | 0.70 | 0.39 |
| 24 | 1.3 | 33 | 7.6 | e4.5 | 50 | 37 | 17 | 161 | 20 | 2.5 | 1.2 | 0.48 |
| 25 | 4.0 | 28 | 7.2 | e4.4 | 45 | 43 | 29 | 92 | 14 | 2.1 | 0.82 | 0.62 |
| 26 | 2.2 | 22 | 6.6 | e4.6 | 39 | 79 | 22 | 53 | 11 | 1.9 | 1.2 | 0.63 |
| 27 | 2.2 | 16 | 6.0 | e5.2 | 34 | 78 | 16 | 41 | 8.4 | 1.6 | 2.7 | 0.46 |
| 28 | 2.0 | 13 | 10 | e5.8 | 31 | 97 | 13 | 31 | 7.3 | 1.5 | 47 | 0.43 |
| 29 | 1.5 | 11 | 12 | e5.6 | 29 | 148 | 10 | 25 | 6.2 | 1.2 | 29 | 0.44 |
| 30 | 1.3 | 9.4 | 13 | e5.8 | --- | 118 | 12 | 145 | 5.3 | 1.1 | 14 | 0.43 |
| 31 | 1.4 | --- | 11 | e5.4 | --- | 67 | --- | 191 | --- | 0.99 | 8.1 | --- |
| TOTAL | 88.71 | 1051.9 | 645.1 | 200.4 | 422.1 | 1866 | 538.7 | 1923.1 | 1078.0 | 453.39 | 244.63 | 36.22 |
| MEAN | 2.86 | 35.1 | 20.8 | 6.46 | 14.6 | 60.2 | 18.0 | 62.0 | 35.9 | 14.6 | 7.89 | 1.21 |
| MAX | 20 | 125 | 114 | 12 | 50 | 190 | 49 | 191 | 173 | 95 | 55 | 5.6 |
| MIN | 0.47 | 4.5 | 6.0 | 4.4 | 3.6 | 19 | 8.5 | 6.4 | 5.3 | 0.99 | 0.37 | 0.37 |
| CFSM | 0.15 | 1.79 | 1.06 | 0.33 | 0.74 | 3.07 | 0.92 | 3.17 | 1.83 | 0.75 | 0.40 | 0.06 |
| IN. | 0.17 | 2.00 | 1.22 | 0.38 | 0.80 | 3.54 | 1.02 | 3.65 | 2.05 | 0.86 | 0.46 | 0.07 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2004, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 9.70 | 14.9 | 15.9 | 13.9 | 20.9 | 33.0 | 35.9 | 25.4 | 18.8 | 11.3 | 11.1 | 10.6 |
| MAX | 84.3 | 89.6 | 92.8 | 53.1 | 69.9 | 147 | 97.1 | 116 | 103 | 46.1 | 64.5 | 65.4 |
| (WY) | 2002 | 1986 | 1983 | 1974 | 1997 | 1979 | 1983 | 1996 | 1970 | 1978 | 1987 | 1972 |
| MIN | 0.00 | 0.00 | 0.03 | 0.04 | 0.12 | 4.80 | 4.26 | 3.33 | 0.74 | 0.06 | 0.00 | 0.00 |
| (WY) | 1953 | 1954 | 1954 | 1954 | 1963 | 1956 | 1963 | 1977 | 1963 | 1953 | 1955 | 1953 |
| SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1952 - 2004 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 5136.33 | 8548.25 | ||||
| ANNUAL MEAN | 14.1 | 23.4 | 18.4 | |||
| HIGHEST ANNUAL MEAN | 32.9 | 1993 | ||||
| LOWEST ANNUAL MEAN | 2.00 | 1963 | ||||
| HIGHEST DAILY MEAN | 131 | May 11 | 191 | May 31 | 525 | Dec 3 1982 |
| LOWEST DAILY MEAN | 0.15 | Jul 3 | 0.37 | A | 0.00 | B |
| ANNUAL SEVEN-DAY MINIMUM | 0.59 | Jun 27 | 0.48 | Sep 21 | 0.00 | Aug 22 1952 |
| MAXIMUM PEAK FLOW | 495 | May 20 | 887 | Jul 22 1982 | ||
| MAXIMUM PEAK STAGE | 6.38 | May 20 | 7.94 | Jul 22 1982 | ||
| INSTANTANEOUS LOW FLOW | 0.23 | Sep 15,21,23 | ||||
| ANNUAL RUNOFF (CFSM) | 0.718 | 1.19 | 0.941 | |||
| ANNUAL RUNOFF (INCHES) | 9.75 | 16.22 | 12.78 | |||
| 10 PERCENT EXCEEDS | 36 | 62 | 44 | |||
| 50 PERCENT EXCEEDS | 5.0 | 9.4 | 7.8 | |||
| 90 PERCENT EXCEEDS | 0.80 | 1.0 | 0.50 | |||