LOCATION.-- Lat 41°38'48", long 87°45'59" (NAD of 1927), in SW1/4SE1/4 sec.32, T.37 N., R.13 E., Cook County, Hydrologic Unit 07120003, on left bank at downstream side of bridge on 135th Street, 1.5 mi west of State Highway 50, 3 mi southeast of Palos Park, and at mile 1.8. | |
DRAINAGE AREA.-- 11.2 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: July 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. | |
SURFACE-WATER QUALITY | |
MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. | |
BIOLOGICAL | |
ALGAE: Water year 2000. | |
BENTHIC MACROINVERTEBRATES: Water year 2000. | |
FISH: Water year 2001. | |
HABITAT: Water year 2000. | |
REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-81-2: 1955(M), 1957(M), 1970(M), 1978(M). | |
GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 607.40 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,010 ft3/s, July 18, 1996, from rating curve extended above 800 ft3/s on basis of indirect measurement of flow through culvert, gage height, 10.25 ft; maximum gage height, 10.30 ft, discharge, 1,930 ft3/s, Oct. 10, 1954; no flow at times in most 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 | 1.4 | 2.2 | 4.0 | 3.2 | e1.2 | 12 | 11 | 22 | 89 | 1.2 | 1.4 | 3.8 |
| 2 | 1.1 | 132 | 3.4 | 3.1 | e1.2 | 11 | 7.7 | 11 | 31 | 1.1 | 1.1 | 2.9 |
| 3 | 0.96 | 134 | 3.1 | 3.1 | e1.3 | 7.8 | 6.0 | 6.3 | 21 | 1.1 | 1.3 | 2.4 |
| 4 | 3.0 | 30 | 3.2 | 3.1 | e1.3 | 39 | 4.9 | 4.5 | 12 | 39 | 69 | 2.2 |
| 5 | 2.0 | 172 | 36 | e3.5 | e1.3 | 321 | 4.1 | 3.5 | 6.9 | 12 | 18 | 2.0 |
| 6 | 1.4 | 34 | 25 | e3.9 | e1.3 | 90 | 3.7 | 2.8 | 5.0 | 7.4 | 6.7 | 1.9 |
| 7 | 1.1 | 11 | 13 | e3.3 | e1.3 | 29 | 3.5 | 2.8 | 3.7 | 7.9 | 3.7 | 1.9 |
| 8 | 0.88 | 6.9 | 8.2 | e2.8 | e1.2 | 17 | 3.3 | 3.2 | 3.1 | 3.9 | 2.6 | 1.6 |
| 9 | 0.80 | 4.9 | 7.0 | e2.4 | e1.2 | 13 | 3.0 | 2.6 | 2.6 | 4.2 | 1.9 | 1.5 |
| 10 | 0.90 | 4.4 | 79 | e2.2 | e1.2 | 10 | 2.7 | 8.5 | 35 | 11 | 1.6 | 1.3 |
| 11 | 1.0 | 3.8 | 33 | e2.0 | e1.2 | 7.7 | 2.6 | 4.9 | 125 | 5.0 | 1.5 | 0.96 |
| 12 | 1.1 | 4.2 | 14 | e1.7 | e1.2 | 5.1 | 2.4 | 8.0 | 386 | 2.9 | 1.5 | 0.94 |
| 13 | 1.2 | 4.3 | 9.0 | e2.0 | e1.2 | 4.0 | 2.2 | 132 | 76 | 2.2 | 1.2 | 0.81 |
| 14 | 20 | 3.7 | 6.2 | e2.0 | e1.2 | 6.0 | 2.0 | 230 | 48 | 1.9 | 1.1 | 0.70 |
| 15 | 17 | 3.4 | 5.4 | e1.8 | e1.2 | 6.5 | 1.8 | 74 | 24 | 1.7 | 1.0 | 0.82 |
| 16 | 6.2 | 3.5 | 6.4 | e1.6 | e1.2 | 5.5 | 1.8 | 24 | 13 | 1.5 | 0.78 | 55 |
| 17 | 3.9 | 5.2 | 5.6 | e1.4 | e1.2 | 5.2 | 2.0 | 14 | 7.6 | 1.4 | 0.68 | 12 |
| 18 | 2.7 | 343 | 4.5 | e1.7 | e1.2 | 6.7 | 2.2 | 89 | 5.1 | 1.2 | 0.63 | 3.9 |
| 19 | 2.2 | 187 | 3.8 | e1.8 | e1.4 | 9.5 | 1.7 | 30 | 3.8 | 1.0 | 1.7 | 2.2 |
| 20 | 2.2 | 42 | 3.3 | e1.7 | e6.0 | 7.5 | 3.5 | 16 | 3.0 | 1.0 | 1.8 | 1.5 |
| 21 | 2.0 | 18 | 3.0 | e1.6 | e30 | 5.6 | 15 | 13 | 4.9 | 4.9 | 1.5 | 1.4 |
| 22 | 1.7 | 12 | 2.9 | e1.5 | e26 | 3.9 | 7.1 | 18 | 8.7 | 32 | 1.1 | 1.2 |
| 23 | 1.7 | 54 | 3.1 | e1.7 | e29 | 3.6 | 4.0 | 66 | 4.0 | 21 | 0.75 | 1.1 |
| 24 | 1.7 | 128 | 3.0 | e1.6 | e28 | 8.7 | 3.1 | 21 | 2.8 | 7.0 | 0.84 | 0.95 |
| 25 | 12 | 27 | 2.8 | e1.5 | e20 | 17 | 27 | 24 | 2.4 | 3.3 | 7.6 | 0.85 |
| 26 | 7.2 | 14 | 2.5 | e1.4 | 14 | 16 | 12 | 16 | 2.0 | 2.3 | 17 | 0.73 |
| 27 | 3.6 | 9.8 | 2.5 | e1.3 | 11 | 13 | 5.9 | 9.1 | 1.6 | 2.0 | 26 | 0.60 |
| 28 | 2.8 | 7.2 | 6.2 | e1.3 | 7.8 | 31 | 4.1 | 6.1 | 1.4 | 1.6 | 148 | 0.61 |
| 29 | 2.5 | 5.6 | 8.4 | e1.2 | 7.7 | 116 | 3.2 | 4.6 | 1.7 | 1.3 | 44 | 0.66 |
| 30 | 2.3 | 4.7 | 5.6 | e1.2 | --- | 27 | 7.1 | 183 | 1.3 | 1.4 | 13 | 0.65 |
| 31 | 2.5 | --- | 4.1 | e1.2 | --- | 18 | --- | 238 | --- | 2.0 | 5.9 | --- |
| TOTAL | 111.04 | 1411.8 | 317.2 | 63.8 | 203.0 | 873.3 | 160.6 | 1287.9 | 931.6 | 187.4 | 384.88 | 109.08 |
| MEAN | 3.58 | 47.1 | 10.2 | 2.06 | 7.00 | 28.2 | 5.35 | 41.5 | 31.1 | 6.05 | 12.4 | 3.64 |
| MAX | 20 | 343 | 79 | 3.9 | 30 | 321 | 27 | 238 | 386 | 39 | 148 | 55 |
| MIN | 0.80 | 2.2 | 2.5 | 1.2 | 1.2 | 3.6 | 1.7 | 2.6 | 1.3 | 1.0 | 0.63 | 0.60 |
| CFSM | 0.32 | 4.20 | 0.91 | 0.18 | 0.62 | 2.52 | 0.48 | 3.71 | 2.77 | 0.54 | 1.11 | 0.32 |
| IN. | 0.37 | 4.69 | 1.05 | 0.21 | 0.67 | 2.90 | 0.53 | 4.28 | 3.09 | 0.62 | 1.28 | 0.36 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2004, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 6.51 | 9.80 | 9.71 | 10.5 | 13.4 | 20.9 | 21.4 | 15.8 | 11.9 | 6.86 | 5.29 | 5.41 |
| MAX | 87.0 | 47.1 | 57.7 | 43.1 | 69.8 | 90.2 | 50.7 | 43.7 | 56.9 | 58.5 | 28.3 | 38.2 |
| (WY) | 1955 | 2004 | 1983 | 1999 | 1997 | 1979 | 1970 | 2002 | 2000 | 1996 | 1987 | 1993 |
| MIN | 0.00 | 0.17 | 0.15 | 0.06 | 0.19 | 2.24 | 1.52 | 1.79 | 0.67 | 0.15 | 0.00 | 0.00 |
| (WY) | 1953 | 1954 | 1964 | 1977 | 1963 | 1981 | 1963 | 1963 | 1965 | 1956 | 1964 | 1953 |
| SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1951 - 2004 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 4785.97 | 6041.60 | ||||
| ANNUAL MEAN | 13.1 | 16.5 | 11.4 | |||
| HIGHEST ANNUAL MEAN | 22.7 | 1993 | ||||
| LOWEST ANNUAL MEAN | 2.27 | 1963 | ||||
| HIGHEST DAILY MEAN | 343 | Nov 18 | 386 | Jun 12 | 891 | Oct 10 1954 |
| LOWEST DAILY MEAN | 0.30 | A | 0.60 | Sep 27 | 0.00 | B |
| ANNUAL SEVEN-DAY MINIMUM | 0.31 | Jan 22 | 0.72 | Sep 24 | 0.00 | B |
| MAXIMUM PEAK FLOW | 690 | May 30 | 2010 C,D | Jul 18 1996 | ||
| MAXIMUM PEAK STAGE | 7.91 | May 30 | 10.30 E | Oct 10 1954 | ||
| INSTANTANEOUS LOW FLOW | 0.57 | F | ||||
| ANNUAL RUNOFF (CFSM) | 1.17 | 1.47 | 1.02 | |||
| ANNUAL RUNOFF (INCHES) | 15.90 | 20.07 | 13.86 | |||
| 10 PERCENT EXCEEDS | 27 | 31 | 25 | |||
| 50 PERCENT EXCEEDS | 3.7 | 3.5 | 2.7 | |||
| 90 PERCENT EXCEEDS | 0.72 | 1.2 | 0.20 | |||
C - From rating curve extended above 800 ft3/s on basis of indirect measurement of flow through culvert. | |
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