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 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 4.5 | 1.5 | 1.9 | 1.6 | e1.0 | e1.0 | 8.5 | 110 | 14 | 0.38 | 6.1 | 1.3 |
| 2 | 10 | 1.4 | 2.1 | 1.5 | e1.2 | e1.0 | 8.2 | 92 | 11 | 0.30 | 5.0 | 1.2 |
| 3 | 7.6 | 1.3 | 1.9 | 1.6 | e1.4 | e1.0 | 11 | 66 | 9.8 | 0.15 | 19 | 1.7 |
| 4 | 18 | 1.1 | 1.8 | 1.8 | e1.7 | e1.1 | 62 | 53 | 8.0 | 2.7 | 27 | 1.4 |
| 5 | 17 | 1.4 | 1.6 | 1.5 | e2.1 | e1.1 | 80 | 121 | 6.3 | 13 | 16 | 1.1 |
| 6 | 12 | 1.2 | 1.6 | 1.5 | e1.9 | e1.1 | 53 | 110 | 6.1 | 23 | 20 | 0.80 |
| 7 | 7.2 | 1.1 | 1.2 | 2.3 | e1.6 | e1.9 | 43 | 77 | 5.5 | 25 | 26 | 0.69 |
| 8 | 4.9 | 0.72 | 1.2 | 1.6 | e1.2 | 4.2 | 39 | 34 | 13 | 16 | 17 | 0.54 |
| 9 | 3.4 | 0.89 | 1.3 | 1.3 | e1.0 | 2.9 | 36 | 75 | 11 | 12 | 11 | 0.46 |
| 10 | 3.3 | 1.1 | 1.2 | 1.6 | e0.89 | 4.3 | 35 | 58 | 9.1 | 11 | 7.6 | 0.45 |
| 11 | 2.7 | 1.1 | 1.3 | e1.7 | e0.83 | 16 | 31 | 131 | 6.1 | 8.3 | 5.5 | 0.42 |
| 12 | 3.3 | 1.1 | 0.94 | e1.8 | e0.81 | 22 | 25 | 124 | 5.1 | 5.7 | 4.3 | 3.6 |
| 13 | 2.2 | 0.90 | 0.83 | e1.6 | e0.81 | 21 | 21 | 96 | 4.1 | 4.5 | 3.8 | 1.7 |
| 14 | 1.7 | 1.1 | 0.84 | e1.7 | e0.80 | 26 | 18 | 71 | 3.5 | 3.4 | 4.5 | 6.6 |
| 15 | 1.7 | 1.3 | 0.88 | e1.5 | e0.80 | 22 | 15 | 52 | 3.1 | 60 | 5.1 | 1.4 |
| 16 | 1.4 | 0.83 | 0.91 | e1.4 | e0.78 | 12 | 13 | 32 | 2.7 | 37 | 4.9 | 0.91 |
| 17 | 1.4 | 0.82 | 1.0 | e1.3 | e0.78 | 12 | 11 | 15 | 2.4 | 30 | 4.1 | 0.67 |
| 18 | 1.4 | 2.0 | 7.8 | e1.3 | e0.78 | 13 | 9.9 | e21 | 2.7 | 19 | 3.2 | 0.61 |
| 19 | 1.0 | 3.6 | 9.0 | e1.2 | e0.78 | 12 | 9.2 | e29 | 2.3 | 12 | 2.4 | 0.47 |
| 20 | 1.0 | 2.4 | 7.6 | e1.1 | e0.80 | 14 | 8.6 | 41 | 2.0 | 13 | 1.7 | 0.48 |
| 21 | 1.0 | 3.4 | 5.7 | e1.0 | e0.82 | 14 | 8.1 | 37 | 1.8 | 14 | 1.4 | 0.69 |
| 22 | 1.0 | 2.6 | 5.1 | e1.0 | e0.78 | 11 | 7.6 | 28 | 1.6 | 10 | 1.1 | 2.0 |
| 23 | 0.84 | 2.5 | 5.3 | e1.1 | e0.79 | 9.2 | 6.9 | 21 | 1.2 | 7.5 | 0.88 | 0.68 |
| 24 | 1.3 | 2.0 | 3.6 | e1.1 | e0.80 | 7.8 | 6.3 | 17 | 0.96 | 4.9 | 0.83 | 0.59 |
| 25 | 4.3 | 1.9 | 3.1 | e1.0 | e0.96 | 11 | 5.9 | 14 | 0.87 | 3.7 | 1.2 | 0.62 |
| 26 | 2.7 | 1.6 | 2.8 | e0.94 | e0.92 | 9.8 | 5.2 | 12 | 0.91 | 2.8 | 1.4 | 6.4 |
| 27 | 2.2 | 1.4 | 2.7 | e0.88 | e0.92 | 8.9 | 4.7 | 11 | 0.67 | 2.3 | 0.79 | 2.8 |
| 28 | 1.8 | 1.3 | 2.2 | e0.82 | e0.98 | 13 | 4.3 | 24 | 1.4 | 2.4 | 0.66 | 3.0 |
| 29 | 1.5 | 1.1 | 1.8 | e0.83 | --- | 16 | 1.3 | 22 | 0.75 | 2.1 | 0.75 | 2.4 |
| 30 | 1.5 | 1.4 | 1.9 | e0.86 | --- | 14 | 12 | 17 | 0.48 | 1.9 | 0.59 | 1.4 |
| 31 | 1.5 | --- | 1.6 | e0.91 | --- | 10 | --- | 15 | --- | 2.0 | 1.0 | --- |
| TOTAL | 125.34 | 46.06 | 82.70 | 41.34 | 28.93 | 314.3 | 599.7 | 1626 | 138.44 | 350.03 | 204.80 | 47.08 |
| MEAN | 4.04 | 1.54 | 2.67 | 1.33 | 1.03 | 10.1 | 20.0 | 52.5 | 4.61 | 11.3 | 6.61 | 1.57 |
| MAX | 18 | 3.6 | 9.0 | 2.3 | 2.1 | 26 | 80 | 131 | 14 | 60 | 27 | 6.6 |
| MIN | 0.84 | 0.72 | 0.83 | 0.82 | 0.78 | 1.0 | 1.3 | 11 | 0.48 | 0.15 | 0.59 | 0.42 |
| CFSM | 0.21 | 0.08 | 0.14 | 0.07 | 0.05 | 0.52 | 1.02 | 2.68 | 0.24 | 0.58 | 0.34 | 0.08 |
| IN. | 0.24 | 0.09 | 0.16 | 0.08 | 0.05 | 0.60 | 1.14 | 3.09 | 0.26 | 0.66 | 0.39 | 0.09 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 9.83 | 14.5 | 15.8 | 14.1 | 21.0 | 32.5 | 36.3 | 24.7 | 18.4 | 11.2 | 11.2 | 10.8 |
| 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 | 0.000 | 0.000 | 0.032 | 0.042 | 0.12 | 4.80 | 4.26 | 3.33 | 0.74 | 0.058 | 0.000 | 0.000 |
| (WY) | 1953 | 1954 | 1954 | 1954 | 1963 | 1956 | 1963 | 1977 | 1963 | 1953 | 1955 | 1953 |
| SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1952 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 6402.70 | 3604.72 | ||||
| ANNUAL MEAN | 17.5 | 9.88 | 18.3 | |||
| HIGHEST ANNUAL MEAN | 32.9 | 1993 | ||||
| LOWEST ANNUAL MEAN | 2.00 | 1963 | ||||
| HIGHEST DAILY MEAN | 279 | Aug 22 | 131 | May 11 | 525 | Dec 3 1982 |
| LOWEST DAILY MEAN | 0.26 | Jul 17 | 0.15 | Jul 3 | 0.00 A | |
| ANNUAL SEVEN-DAY MINIMUM | 0.38 | Jul 15 | 0.59 | Jun 27 | 0.00 | Aug 22 1952 |
| MAXIMUM PEAK FLOW | 193 | Jul 15 | 887 | Jul 22 1982 | ||
| MAXIMUM PEAK STAGE | 4.33 | Jul 15 | 7.94 | Jul 22 1982 | ||
| INSTANTANEOUS LOW FLOW | 0.00 B | |||||
| ANNUAL RUNOFF (CFSM) | 0.89 | 0.50 | 0.94 | |||
| ANNUAL RUNOFF (INCHES) | 12.15 | 6.84 | 12.71 | |||
| 10 PERCENT EXCEEDS | 38 | 24 | 44 | |||
| 50 PERCENT EXCEEDS | 6.3 | 2.3 | 7.8 | |||
| 90 PERCENT EXCEEDS | 1.0 | 0.81 | 0.49 | |||