LOCATION.-- Lat 42°13'57", long 87°50'41" (NAD of 1927), in NW1/4SW1/4 sec.4, T.43 N., R.12 E., Lake County, Hydrologic Unit 07120003, on right bank at upstream side of bridge on Westleigh Road at Lake Forest and at mile 13.1. | |
DRAINAGE AREA.-- 13.0 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1951 to current year. Prior to October 1952, records published with those for streams in the St. Lawrence River Basin (WSP 1237). | |
STAGE: Water years 1994 to current year. | |
REVISED RECORDS.-- WDR IL-75-1: Drainage area. | |
GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 648.75 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 580 ft3/s, Oct. 13, 2001, gage height, 7.78 ft; maximum gage height, 8.35 ft, July 22, 1982; no flow many days in 1959. | |
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 | 7.5 | 1.1 | 1.0 | 4.6 | e0.76 | e0.51 | 8.3 | 120 | 17 | 1.0 | 1.2 | 1.4 |
| 2 | 20 | 1.5 | 1.0 | 1.7 | e1.1 | e0.52 | 6.7 | 53 | 12 | 0.99 | 1.1 | 0.96 |
| 3 | 10 | 0.77 | 1.0 | 1.5 | e1.7 | e0.52 | 15 | 29 | 8.6 | 0.73 | 5.5 | 1.1 |
| 4 | 27 | 0.80 | 1.0 | 1.5 | e1.5 | e0.53 | 57 | 31 | 5.9 | 1.3 | 7.2 | 0.47 |
| 5 | 15 | 1.2 | 0.95 | 1.5 | e0.96 | e0.54 | 46 | 120 | 4.8 | 35 | 6.2 | 0.37 |
| 6 | 10 | 2.3 | 0.74 | 1.8 | e0.76 | e0.55 | 27 | 53 | 4.8 | 54 | 3.9 | 0.31 |
| 7 | 8.7 | 1.4 | 0.78 | 1.5 | e0.70 | e0.58 | 24 | 31 | 4.4 | 55 | 1.8 | 0.28 |
| 8 | 6.2 | 1.2 | 0.82 | 1.8 | e0.67 | e0.70 | 22 | 23 | 11 | 66 | 2.2 | 0.26 |
| 9 | 3.6 | 1.5 | 2.6 | 2.0 | e0.64 | e0.88 | 28 | 59 | 7.0 | 40 | 1.1 | 0.29 |
| 10 | 2.0 | 0.94 | 0.72 | 1.8 | e0.61 | e1.3 | 25 | 93 | 5.2 | 28 | 0.75 | 0.29 |
| 11 | 1.5 | 1.7 | 0.96 | 1.7 | e0.61 | 9.3 | 19 | 150 | 3.5 | 21 | 0.64 | 0.34 |
| 12 | 1.4 | 1.8 | 1.4 | 1.2 | e0.58 | 36 | 15 | 70 | 2.8 | 14 | 0.62 | 2.8 |
| 13 | 1.5 | 1.4 | 1.7 | 1.1 | e0.55 | 61 | 12 | 38 | 2.5 | 12 | 1.1 | 3.7 |
| 14 | 1.2 | 1.3 | 0.93 | e0.78 | e0.52 | 62 | 10 | 30 | 2.1 | 10 | 2.6 | 10 |
| 15 | 1.0 | 3.2 | 0.84 | e0.74 | e0.51 | 53 | 8.1 | 27 | 1.8 | 54 | 2.1 | 5.2 |
| 16 | 0.89 | 1.6 | 0.81 | e0.72 | e0.50 | 43 | 6.3 | 21 | 1.5 | 22 | 0.98 | 2.3 |
| 17 | 0.91 | 1.7 | 0.83 | e0.69 | e0.50 | 34 | 3.5 | 18 | 1.4 | 26 | 1.1 | 1.1 |
| 18 | 1.2 | 2.3 | 16 | e0.66 | e0.49 | 21 | 2.8 | 16 | 26 | 24 | 0.72 | 0.74 |
| 19 | 1.1 | 7.4 | 12 | e0.64 | e0.48 | 18 | 2.7 | 15 | 19 | 13 | 0.60 | 0.54 |
| 20 | 0.83 | 2.8 | 6.4 | e0.60 | e0.49 | 28 | 3.0 | 19 | 7.0 | 8.2 | 1.1 | 0.43 |
| 21 | 0.76 | 8.4 | 4.0 | e0.57 | e0.49 | 25 | 2.6 | 14 | 4.2 | 24 | 0.59 | 0.36 |
| 22 | 0.77 | 8.3 | 2.8 | e0.54 | e0.48 | 17 | 2.2 | 13 | 2.9 | 16 | 0.55 | 1.6 |
| 23 | 0.78 | 4.0 | 2.4 | e0.54 | e0.48 | 12 | 2.0 | 12 | 3.1 | 12 | 0.46 | 1.1 |
| 24 | 2.3 | 2.5 | 1.8 | e0.52 | e0.48 | 12 | 1.7 | 11 | 1.6 | 9.5 | 0.43 | 0.49 |
| 25 | 6.1 | 3.2 | 1.7 | e0.50 | e0.49 | 27 | 1.7 | 11 | 1.3 | 8.1 | 0.43 | 0.48 |
| 26 | 3.7 | 2.6 | 1.5 | e0.49 | e0.50 | 17 | 1.5 | 10 | 1.2 | 6.6 | 1.4 | 7.0 |
| 27 | 2.4 | 1.5 | 1.4 | e0.48 | e0.50 | 11 | 1.3 | 8.2 | 1.2 | 2.8 | 0.56 | 7.6 |
| 28 | 1.7 | 1.3 | 1.3 | e0.49 | e0.51 | 23 | 1.3 | 22 | 1.7 | 1.7 | 0.44 | 3.7 |
| 29 | 1.7 | 1.3 | 1.3 | e0.49 | --- | 22 | 1.1 | 25 | 1.8 | 1.4 | 0.66 | 1.7 |
| 30 | 1.4 | 1.3 | 1.7 | e0.52 | --- | 14 | 11 | 21 | 1.2 | 1.0 | 0.40 | 2.0 |
| 31 | 1.7 | --- | 2.5 | e0.64 | --- | 10 | --- | 30 | --- | 1.0 | 0.47 | --- |
| TOTAL | 144.84 | 72.31 | 74.88 | 34.31 | 18.56 | 561.93 | 367.8 | 1193.2 | 168.5 | 570.32 | 48.90 | 58.91 |
| MEAN | 4.67 | 2.41 | 2.42 | 1.11 | 0.66 | 18.1 | 12.3 | 38.5 | 5.62 | 18.4 | 1.58 | 1.96 |
| MAX | 27 | 8.4 | 16 | 4.6 | 1.7 | 62 | 57 | 150 | 26 | 66 | 7.2 | 10 |
| MIN | 0.76 | 0.77 | 0.72 | 0.48 | 0.48 | 0.51 | 1.1 | 8.2 | 1.2 | 0.73 | 0.40 | 0.26 |
| CFSM | 0.36 | 0.19 | 0.19 | 0.09 | 0.05 | 1.39 | 0.94 | 2.96 | 0.43 | 1.42 | 0.12 | 0.15 |
| IN. | 0.41 | 0.21 | 0.21 | 0.10 | 0.05 | 1.61 | 1.05 | 3.41 | 0.48 | 1.63 | 0.14 | 0.17 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 7.96 | 10.2 | 10.6 | 9.55 | 13.5 | 22.3 | 24.5 | 16.0 | 12.5 | 8.42 | 7.25 | 8.34 |
| MAX | 53.7 | 44.5 | 53.7 | 42.4 | 35.5 | 82.3 | 56.9 | 54.3 | 41.6 | 33.3 | 41.7 | 61.7 |
| (WY) | 2002 | 1986 | 1983 | 1974 | 1997 | 1979 | 1983 | 1996 | 1996 | 1993 | 1972 | 1986 |
| MIN | 0.83 | 0.73 | 1.20 | 0.29 | 0.66 | 4.01 | 5.95 | 2.26 | 0.91 | 1.29 | 1.26 | 1.12 |
| (WY) | 1957 | 2000 | 1959 | 1959 | 2003 | 1956 | 1986 | 1988 | 1988 | 1991 | 1955 | 1979 |
| SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1952 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 3555.51 | 3314.46 | ||||
| ANNUAL MEAN | 9.74 | 9.08 | 12.6 | |||
| HIGHEST ANNUAL MEAN | 22.2 | 1974 | ||||
| LOWEST ANNUAL MEAN | 3.54 | 1963 | ||||
| HIGHEST DAILY MEAN | 188 | Aug 22 | 150 | May 11 | 444 | Sep 27 1986 |
| LOWEST DAILY MEAN | 0.38 | Aug 12 | 0.26 | Sep 8 | 0.00 | A |
| ANNUAL SEVEN-DAY MINIMUM | 0.49 | Aug 6 | 0.31 | Sep 5 | 0.00 | Jan 3 1959 |
| MAXIMUM PEAK FLOW | 238 | May 10 | 580 B | Oct 13 2001 | ||
| MAXIMUM PEAK STAGE | 5.04 | May 10 | 8.35 C | Jul 22 1982 | ||
| INSTANTANEOUS LOW FLOW | 0.21 | Sep 7,8 | ||||
| ANNUAL RUNOFF (CFSM) | 0.75 | 0.70 | 0.97 | |||
| ANNUAL RUNOFF (INCHES) | 10.17 | 9.48 | 13.14 | |||
| 10 PERCENT EXCEEDS | 21 | 26 | 28 | |||
| 50 PERCENT EXCEEDS | 3.9 | 1.7 | 5.2 | |||
| 90 PERCENT EXCEEDS | 0.75 | 0.51 | 1.3 | |||