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 2003 TO SEPTEMBER 2004
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 0.95 | 1.6 | 3.5 | 4.2 | e0.92 | 32 | 23 | 6.4 | 64 | 10 | 0.61 | 1.1 |
| 2 | 0.53 | 34 | 3.4 | 3.8 | e1.0 | 27 | 18 | 4.6 | 33 | 8.6 | 0.59 | 0.53 |
| 3 | 3.3 | 57 | 3.1 | e2.4 | e1.1 | 19 | 15 | 4.1 | 22 | 24 | 0.97 | 0.37 |
| 4 | 2.1 | 49 | 2.6 | e1.6 | e1.1 | 32 | 13 | 3.3 | 18 | 41 | 13 | 0.29 |
| 5 | 1.1 | 62 | 11 | e1.8 | e1.1 | 165 | 11 | 2.6 | 16 | 18 | 4.6 | 0.27 |
| 6 | 1.1 | 32 | 7.5 | e2.0 | e1.1 | 81 | 9.8 | 2.2 | 15 | 14 | 2.4 | 0.22 |
| 7 | 0.76 | 19 | 5.0 | e1.6 | e1.1 | 43 | 7.7 | 2.2 | 14 | 13 | 1.3 | 0.23 |
| 8 | 0.65 | 14 | 4.2 | e1.4 | e1.2 | 31 | 7.3 | 1.9 | 13 | 11 | 0.92 | 0.12 |
| 9 | 0.59 | 12 | 12 | e1.3 | e1.2 | 24 | 6.9 | 2.0 | 13 | 17 | 0.85 | 0.11 |
| 10 | 0.62 | 11 | 81 | e1.2 | e1.1 | 20 | 6.3 | 9.0 | 79 | 59 | 0.95 | 0.12 |
| 11 | 0.60 | 10 | 46 | e1.3 | e1.3 | 18 | 5.7 | 8.8 | 92 | 21 | 0.56 | 0.16 |
| 12 | 0.68 | 10 | 27 | e1.6 | e1.1 | 15 | 5.5 | 7.3 | 59 | 11 | 0.72 | 0.11 |
| 13 | 0.62 | 9.3 | 18 | e1.5 | e1.1 | 13 | 5.1 | 27 | 34 | 7.4 | 0.52 | 0.12 |
| 14 | 21 | 9.2 | 15 | e1.5 | e1.2 | 15 | 4.7 | 53 | 23 | 5.0 | 0.50 | 0.19 |
| 15 | 9.9 | 9.0 | 13 | e1.4 | e1.1 | 12 | 4.5 | 36 | 18 | 3.5 | 0.50 | 0.26 |
| 16 | 7.0 | 8.3 | 13 | e1.3 | e1.2 | 11 | 4.1 | 22 | 15 | 2.5 | 0.64 | 1.6 |
| 17 | 3.6 | 7.7 | 12 | e1.5 | e2.8 | 11 | 13 | 17 | 15 | 2.4 | 2.3 | 0.64 |
| 18 | 2.4 | 66 | 10 | e1.4 | e5.0 | 13 | 5.3 | 134 | 13 | 1.8 | 1.2 | 0.29 |
| 19 | 1.5 | 36 | 9.7 | e1.3 | 15 | 12 | 5.3 | 65 | 12 | 1.6 | 0.91 | 0.38 |
| 20 | 1.5 | 23 | 10 | e1.2 | 41 | 15 | 8.9 | 33 | 11 | 1.4 | 0.65 | 0.15 |
| 21 | 1.7 | 16 | 7.5 | e1.1 | 47 | 9.5 | 14 | e80 | 46 | 1.8 | 0.66 | 0.13 |
| 22 | 1.5 | 12 | 4.5 | e1.1 | 37 | 8.6 | 7.7 | e170 | 32 | 4.0 | 0.71 | 0.29 |
| 23 | 1.5 | 17 | 5.4 | e1.1 | 41 | 8.1 | 6.2 | 91 | 20 | 1.6 | 0.55 | 0.22 |
| 24 | 1.8 | 19 | 5.7 | e1.0 | 30 | 29 | 8.3 | 50 | 19 | 1.1 | 1.6 | 0.22 |
| 25 | 7.0 | 12 | 3.3 | e0.96 | 25 | 19 | 18 | 31 | 15 | 1.2 | 2.3 | 0.31 |
| 26 | 3.1 | 11 | 3.1 | e1.0 | 22 | 83 | 9.0 | 22 | 13 | 1.1 | 0.83 | 0.20 |
| 27 | 4.2 | 10 | 2.6 | e1.0 | 20 | 44 | 7.1 | 18 | 12 | 0.88 | 3.0 | 0.34 |
| 28 | 1.5 | 8.6 | 7.7 | e0.99 | 18 | 82 | 6.2 | 15 | 12 | 0.78 | 21 | 0.30 |
| 29 | 1.9 | 6.7 | 8.3 | e0.98 | 20 | 114 | 5.4 | 17 | 11 | 0.80 | 7.5 | 0.87 |
| 30 | 1.8 | 4.1 | 6.7 | e0.95 | --- | 54 | 5.8 | 144 | 11 | 0.73 | 4.3 | 0.53 |
| 31 | 1.6 | --- | 5.6 | e0.92 | --- | 30 | --- | 145 | --- | 0.70 | 1.7 | --- |
| TOTAL | 88.10 | 596.5 | 367.4 | 46.40 | 341.72 | 1090.2 | 267.8 | 1224.4 | 770 | 287.89 | 78.84 | 10.67 |
| MEAN | 2.84 | 19.9 | 11.9 | 1.50 | 11.8 | 35.2 | 8.93 | 39.5 | 25.7 | 9.29 | 2.54 | 0.36 |
| MAX | 21 | 66 | 81 | 4.2 | 47 | 165 | 23 | 170 | 92 | 59 | 21 | 1.6 |
| MIN | 0.53 | 1.6 | 2.6 | 0.92 | 0.92 | 8.1 | 4.1 | 1.9 | 11 | 0.70 | 0.50 | 0.11 |
| CFSM | 0.22 | 1.53 | 0.91 | 0.12 | 0.91 | 2.71 | 0.69 | 3.04 | 1.97 | 0.71 | 0.20 | 0.03 |
| IN. | 0.25 | 1.71 | 1.05 | 0.13 | 0.98 | 3.12 | 0.77 | 3.50 | 2.20 | 0.82 | 0.23 | 0.03 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2004, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 7.86 | 10.4 | 10.6 | 9.40 | 13.5 | 22.5 | 24.2 | 16.4 | 12.7 | 8.43 | 7.16 | 8.19 |
| 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 | 0.36 |
| (WY) | 1957 | 2000 | 1959 | 1959 | 2003 | 1956 | 1986 | 1988 | 1988 | 1991 | 1955 | 2004 |
| SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1952 - 2004 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 4074.43 | 5169.92 | ||||
| ANNUAL MEAN | 11.2 | 14.1 | 12.6 | |||
| HIGHEST ANNUAL MEAN | 22.2 | 1974 | ||||
| LOWEST ANNUAL MEAN | 3.54 | 1963 | ||||
| HIGHEST DAILY MEAN | 150 | May 11 | 170 A | May 22 | 444 | Sep 27 1986 |
| LOWEST DAILY MEAN | 0.26 | Sep 8 | 0.11 | Sep 9,12 | 0.00 | B |
| ANNUAL SEVEN-DAY MINIMUM | 0.31 | Sep 5 | 0.13 | Sep 8 | 0.00 | Jan 3 1959 |
| MAXIMUM PEAK FLOW | 267 | May 30 | 580 C | Oct 13 2001 | ||
| MAXIMUM PEAK STAGE | 5.32 | May 30 | 8.35 D | Jul 22 1982 | ||
| INSTANTANEOUS LOW FLOW | 0.05 | Sep 8,10-13 | ||||
| ANNUAL RUNOFF (CFSM) | 0.859 | 1.09 | 0.969 | |||
| ANNUAL RUNOFF (INCHES) | 11.66 | 14.79 | 13.17 | |||
| 10 PERCENT EXCEEDS | 29 | 35 | 28 | |||
| 50 PERCENT EXCEEDS | 3.1 | 5.7 | 5.2 | |||
| 90 PERCENT EXCEEDS | 0.51 | 0.62 | 1.3 | |||