LOCATION.-- Lat 42°05'43", long 87°54'46" (NAD of 1927), in SW1/4SE1/4 sec.23, T.42 N., R.11 E., Cook County, Hydrologic Unit 07120004, on left bank at upstream side of bridge on Camp McDonald Road, 2.5 mi northeast of Mount Prospect, and at mile 2.0. | |
DRAINAGE AREA.-- 7.93 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: August 1952 to current year. | |
STAGE: Water years 1994-2002. | |
REVISED RECORDS.-- WSP 1915: 1958. WDR IL-75-1: Drainage area. | |
GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 639.12 ft above NGVD of 1929 (Cook County Highway Department bench mark). Prior to May 9, 1978, at site 55 ft downstream at same datum. Mar. 7 to Sept. 30, 1994, at temporary site 50 ft upstream at same datum. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 806 ft3/s, Aug. 14, 1987, gage height, 8.08 ft; no flow at times in several years. | |
REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. | |
| DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 2.2 | 7.4 | e13 | e0.40 | 4.3 | 2.7 | 5.3 | 12 | 2.3 | 0.98 | 0.81 | 3.4 |
| 2 | 2.1 | 6.0 | e13 | e0.39 | 3.7 | 4.2 | 6.5 | 46 | 1.7 | 0.91 | 0.57 | 24 |
| 3 | 2.1 | 4.7 | e8.0 | e0.35 | 3.1 | 5.3 | 4.8 | 17 | 5.9 | 0.89 | 0.56 | 17 |
| 4 | 4.1 | 4.0 | e8.0 | e0.31 | 2.7 | 5.6 | 3.8 | 11 | 107 | 0.89 | 1.1 | 8.4 |
| 5 | 11 | e2.4 | e4.4 | e0.30 | 2.8 | 4.1 | 4.2 | 7.1 | 53 | 0.75 | 2.7 | 5.4 |
| 6 | 5.2 | e2.0 | e4.4 | e0.32 | 2.5 | 4.3 | 3.5 | 6.0 | 30 | 1.0 | 1.2 | 4.1 |
| 7 | 3.4 | e1.6 | e2.7 | e0.30 | 2.6 | 6.2 | 6.0 | 4.8 | 18 | 0.83 | 0.86 | 3.2 |
| 8 | 2.7 | e1.8 | e2.0 | e0.28 | 3.0 | 28 | 23 | 4.4 | 20 | 0.86 | 0.82 | 2.9 |
| 9 | 2.2 | e1.4 | e1.5 | e0.28 | 4.6 | 28 | 46 | 8.6 | 15 | 2.7 | 0.89 | 2.7 |
| 10 | 2.6 | e1.4 | e1.9 | e0.28 | 9.9 | 9.3 | 22 | 5.0 | 7.3 | 1.2 | 0.81 | 2.4 |
| 11 | 4.0 | e0.70 | e1.1 | e0.27 | 6.8 | 23 | 13 | 24 | 14 | 0.94 | 0.76 | 2.2 |
| 12 | 20 | e0.64 | e1.3 | e0.27 | 5.7 | 26 | 9.2 | 92 | 9.0 | 0.89 | 0.68 | 2.1 |
| 13 | 125 | e0.60 | e12 | e0.27 | 4.7 | 15 | 6.7 | 39 | 5.0 | 0.81 | 30 | 2.0 |
| 14 | 223 | e0.56 | e13 | e0.32 | 4.7 | 9.0 | 6.0 | 19 | 6.2 | 0.73 | 37 | 2.2 |
| 15 | 79 | e0.54 | e10 | e0.36 | 5.2 | 6.9 | 5.3 | 11 | 7.1 | e0.70 | 13 | 1.9 |
| 16 | 60 | e0.72 | e7.0 | e0.36 | 4.3 | 5.2 | 4.7 | 32 | 3.6 | 0.67 | 6.5 | 1.9 |
| 17 | 35 | e0.48 | e10 | e0.46 | 3.5 | 4.4 | 4.6 | 32 | 2.5 | 0.62 | 4.1 | 1.9 |
| 18 | 21 | e0.44 | e5.2 | e0.43 | 3.3 | 3.9 | 4.2 | 15 | 2.1 | 0.59 | 2.7 | 2.4 |
| 19 | 13 | e0.58 | e5.8 | e0.37 | 7.5 | 3.6 | 3.7 | 9.2 | 1.7 | 0.61 | 3.5 | 13 |
| 20 | 9.4 | e0.58 | e13 | e0.33 | 20 | 3.6 | 3.3 | 6.3 | 1.4 | 0.66 | 2.5 | 17 |
| 21 | 7.2 | e0.44 | e5.4 | e0.36 | 14 | 3.2 | 7.4 | 5.2 | 1.2 | 0.72 | 13 | 11 |
| 22 | 14 | e0.38 | e5.0 | e0.35 | 9.4 | 2.9 | 6.5 | 4.4 | 1.2 | 0.60 | 274 | 21 |
| 23 | 85 | e0.35 | e6.4 | e0.97 | 7.1 | 2.8 | 4.7 | 3.8 | 1.2 | 0.46 | 147 | 9.5 |
| 24 | 58 | e1.2 | e4.3 | e1.0 | 5.9 | 2.5 | 4.6 | 3.1 | 1.2 | 0.50 | 54 | 6.7 |
| 25 | 33 | e3.8 | e3.2 | e0.72 | 4.6 | 2.3 | 4.2 | 3.8 | 1.1 | 0.59 | 28 | 3.6 |
| 26 | 40 | e2.5 | e2.3 | e0.68 | 4.1 | 2.3 | 3.1 | 3.4 | 1.2 | 0.66 | 17 | 3.0 |
| 27 | 37 | e1.8 | e1.6 | e0.90 | 3.6 | 2.3 | 6.4 | 2.9 | 1.0 | 1.2 | 11 | 2.6 |
| 28 | 20 | e1.5 | e1.2 | e1.1 | 3.1 | 2.4 | 9.7 | 2.8 | 1.00 | 1.0 | 7.7 | 2.3 |
| 29 | 20 | e3.7 | e0.80 | e0.92 | --- | 10 | 6.3 | 2.9 | 0.94 | 2.4 | 5.8 | 5.6 |
| 30 | 17 | e15 | e0.56 | 1.1 | --- | 8.9 | 4.9 | 2.6 | 1.0 | 1.2 | 4.5 | 3.9 |
| 31 | 10 | --- | e0.46 | 2.5 | --- | 6.1 | --- | 2.5 | --- | 0.92 | 3.8 | --- |
| TOTAL | 968.2 | 69.21 | 168.52 | 17.25 | 156.7 | 244.0 | 243.6 | 438.8 | 323.84 | 28.48 | 676.86 | 189.3 |
| MEAN | 31.23 | 2.307 | 5.436 | 0.556 | 5.596 | 7.871 | 8.120 | 14.15 | 10.79 | 0.919 | 21.83 | 6.310 |
| MAX | 223 | 15 | 13 | 2.5 | 20 | 28 | 46 | 92 | 107 | 2.7 | 274 | 24 |
| MIN | 2.1 | 0.35 | 0.46 | 0.27 | 2.5 | 2.3 | 3.1 | 2.5 | 0.94 | 0.46 | 0.56 | 1.9 |
| CFSM | 3.94 | 0.29 | 0.69 | 0.07 | 0.71 | 0.99 | 1.02 | 1.78 | 1.36 | 0.12 | 2.75 | 0.80 |
| IN. | 4.54 | 0.32 | 0.79 | 0.08 | 0.74 | 1.14 | 1.14 | 2.06 | 1.52 | 0.13 | 3.18 | 0.89 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2002, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 4.123 | 5.152 | 4.888 | 4.511 | 6.406 | 9.782 | 12.06 | 7.768 | 7.275 | 4.581 | 5.325 | 4.294 |
| MAX | 31.2 | 28.5 | 27.2 | 20.7 | 26.5 | 36.2 | 35.0 | 31.3 | 33.5 | 26.2 | 39.7 | 23.9 |
| (WY) | 2002 | 1986 | 1983 | 1999 | 1997 | 1979 | 1999 | 1996 | 1970 | 1957 | 1987 | 1972 |
| MIN | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 1.58 | 2.05 | 1.46 | 0.50 | 0.019 | 0.000 | 0.000 |
| (WY) | 1953 | 1954 | 1954 | 1954 | 1954 | 1956 | 1989 | 1988 | 1963 | 1953 | 1953 | 1953 |
| SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1952 - 2002 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 3592.09 | 3524.76 | ||||
| ANNUAL MEAN | 9.841 | 9.657 | 6.344 | |||
| HIGHEST ANNUAL MEAN | 11.7 | 1972 | ||||
| LOWEST ANNUAL MEAN | 1.17 | 1963 | ||||
| HIGHEST DAILY MEAN | 223 | Oct 14 | 274 | Aug 22 | 476 | Aug 14 1987 |
| LOWEST DAILY MEAN | 0.35 A | Nov 23 | 0.27 A | Jan 11-13 | 0.00 | B |
| ANNUAL SEVEN-DAY MINIMUM | 0.46 | Nov 17 | 0.28 | Jan 7 | 0.00 | Sep 12 1952 |
| MAXIMUM PEAK FLOW | 345 C | Aug 22 | 806 | Aug 14 1987 | ||
| MAXIMUM PEAK STAGE | 6.75 D | Oct 13 | 8.08 | Aug 14 1987 | ||
| INSTANTANEOUS LOW FLOW | E | |||||
| ANNUAL RUNOFF (CFSM) | 1.24 | 1.22 | 0.80 | |||
| ANNUAL RUNOFF (INCHES) | 16.85 | 16.53 | 10.87 | |||
| 10 PERCENT EXCEEDS | 20 | 20 | 14 | |||
| 50 PERCENT EXCEEDS | 4.0 | 3.6 | 2.2 | |||
| 90 PERCENT EXCEEDS | 1.3 | 0.58 | 0.08 | |||
E - Minimum not determined. Occurred during period of ice effect. |