LOCATION.-- Lat 41°31'15", long 87°35'25" (NAD of 1927), in SE1/4NW1/4 sec.14, T.35 N., R.14 E., Cook County, Hydrologic Unit 07120003, on left bank at downstream side of bridge on Joe Orr Road, 0.4 mi east of Cottage Grove Avenue, 1.0 mi north of U.S. Highway 30, 1.5 mi northeast of Chicago Heights, and at mile 2.8. | |
DRAINAGE AREA.-- 23.1 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: May 1948 to current year. Prior to October 1974, records published with those for streams in the St. Lawrence River basin (WSP 1307, 1727, 1911, 2111, WDR IL 1971-74). | |
STAGE: Water years 1994-2002. | |
REVISED RECORDS.-- WDR IL-75-1: Drainage area. | |
GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 615.95 ft above NGVD of 1929. See WSP 1707 or 1727 for history of changes prior to Aug. 13, 1958. | |
REMARKS.-- Undetermined amount of flow diverted for irrigation upstream from the gage. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,380 ft3/s, July 13, 1957, gage height, 11.75 ft; maximum gage height, 11.79 ft, Nov. 28, 1990, discharge, 809 ft3/s; no flow at times in several years. | |
REMARKS FOR CURRENT YEAR.-- Records fair 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 | 1.7 | 10 | 46 | e4.5 | 72 | 10 | 12 | 21 | 7.3 | 3.1 | 2.1 | 0.77 |
| 2 | 1.7 | 68 | 26 | e4.4 | 55 | 14 | 67 | 17 | 6.4 | 2.8 | 2.0 | 2.6 |
| 3 | 1.5 | 55 | 18 | e4.3 | 35 | e21 | 65 | 14 | 5.9 | 2.7 | 2.0 | 1.6 |
| 4 | 3.8 | 28 | 14 | e4.3 | 24 | e20 | 34 | 11 | 6.1 | 9.8 | 2.1 | 1.4 |
| 5 | 55 | 19 | 13 | e4.4 | 18 | e17 | 23 | 9.6 | 7.7 | 13 | 2.4 | 1.1 |
| 6 | 28 | 15 | 13 | 4.6 | 14 | 21 | 19 | 13 | 6.5 | 4.3 | 2.4 | 0.96 |
| 7 | 11 | 12 | 11 | 4.6 | 12 | 64 | 19 | 12 | 6.3 | 3.0 | 1.7 | 1.1 |
| 8 | 6.4 | 10 | 9.6 | 4.3 | 12 | 196 | 108 | 23 | 5.4 | 2.6 | 1.5 | 2.2 |
| 9 | 4.5 | 8.7 | 8.4 | 4.6 | 19 | 237 | e371 | 298 | 4.7 | 15 | 3.3 | 1.9 |
| 10 | 4.3 | 8.0 | 7.6 | 5.2 | 61 | 118 | e107 | 119 | 4.4 | 12 | 1.8 | 2.1 |
| 11 | 4.2 | 7.4 | 7.0 | 5.2 | 48 | 62 | 58 | 162 | 5.6 | 6.5 | 1.5 | 2.8 |
| 12 | 47 | 7.0 | 6.6 | 5.1 | 33 | 41 | 37 | 676 | 5.0 | 4.0 | 1.3 | 2.4 |
| 13 | 60 | 6.7 | 10 | 4.9 | 22 | 30 | 26 | 466 | 5.0 | 3.1 | 1.1 | 3.0 |
| 14 | 185 | 7.7 | 16 | 5.0 | 17 | 24 | 21 | 156 | 5.7 | 2.6 | 1.3 | 3.0 |
| 15 | 81 | 8.2 | 18 | 5.2 | 15 | 20 | 18 | 70 | 8.0 | 2.7 | 1.4 | 3.2 |
| 16 | 52 | 6.7 | 14 | 4.9 | 13 | 15 | 15 | 57 | 4.9 | 2.3 | 3.4 | 2.8 |
| 17 | 34 | 7.7 | 27 | 4.6 | 11 | 14 | 15 | 57 | 4.2 | 2.3 | 2.9 | 2.6 |
| 18 | 22 | 8.6 | 28 | e4.3 | 9.6 | 12 | 15 | 35 | 4.1 | 2.5 | 1.6 | 3.1 |
| 19 | 17 | 10 | 20 | e4.0 | 17 | 12 | 13 | 25 | 4.0 | 2.8 | 3.5 | 4.2 |
| 20 | 13 | 9.0 | 15 | 3.8 | 87 | 16 | 45 | 21 | 3.9 | 2.1 | 3.3 | 5.7 |
| 21 | 11 | 6.7 | 12 | 3.8 | 65 | 17 | 39 | 17 | 3.7 | 2.0 | 1.9 | 5.0 |
| 22 | 9.9 | 6.2 | 10 | 4.0 | 38 | 14 | 36 | 14 | 3.3 | 2.0 | 1.8 | 3.5 |
| 23 | 25 | 6.1 | 12 | 4.9 | 25 | 12 | 25 | 13 | 3.2 | 1.9 | 2.3 | 3.4 |
| 24 | 26 | 8.3 | 10 | 5.8 | 19 | 9.6 | 24 | 57 | 2.9 | 1.8 | 2.7 | 3.1 |
| 25 | 36 | 13 | 8.6 | 5.4 | 17 | 11 | 36 | 31 | 3.8 | 2.0 | 2.0 | 3.0 |
| 26 | 24 | 10 | 7.3 | 5.1 | 17 | 9.4 | 21 | 20 | 5.1 | 2.0 | 1.3 | 2.8 |
| 27 | 17 | 10 | 7.2 | 4.9 | 16 | 10 | 32 | 15 | 12 | 3.2 | 1.2 | 2.8 |
| 28 | 13 | 8.4 | 6.7 | 5.0 | 12 | 10 | 83 | 12 | 4.9 | 3.4 | 1.3 | 2.4 |
| 29 | 11 | 11 | 5.9 | 4.9 | --- | 13 | 42 | 10 | 3.7 | 3.4 | 0.96 | 2.4 |
| 30 | 9.8 | 67 | 5.1 | 7.7 | --- | 18 | 29 | 8.9 | 3.3 | 3.6 | 0.88 | 1.7 |
| 31 | 8.7 | --- | e4.7 | 32 | --- | 13 | --- | 8.1 | --- | 2.3 | 0.75 | --- |
| TOTAL | 824.5 | 459.4 | 417.7 | 175.7 | 803.6 | 1101.0 | 1455 | 2468.6 | 157.0 | 126.8 | 59.69 | 78.63 |
| MEAN | 26.60 | 15.31 | 13.47 | 5.668 | 28.70 | 35.52 | 48.50 | 79.63 | 5.233 | 4.090 | 1.925 | 2.621 |
| MAX | 185 | 68 | 46 | 32 | 87 | 237 | 371 | 676 | 12 | 15 | 3.5 | 5.7 |
| MIN | 1.5 | 6.1 | 4.7 | 3.8 | 9.6 | 9.4 | 12 | 8.1 | 2.9 | 1.8 | 0.75 | 0.77 |
| CFSM | 1.15 | 0.66 | 0.58 | 0.25 | 1.24 | 1.54 | 2.10 | 3.45 | 0.23 | 0.18 | 0.08 | 0.11 |
| IN. | 1.33 | 0.74 | 0.67 | 0.28 | 1.29 | 1.77 | 2.34 | 3.98 | 0.25 | 0.20 | 0.10 | 0.13 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2002, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 7.960 | 14.43 | 18.47 | 18.51 | 26.76 | 38.02 | 34.95 | 24.25 | 20.41 | 9.374 | 6.993 | 7.022 |
| MAX | 55.9 | 78.3 | 83.6 | 74.5 | 119 | 167 | 78.2 | 79.6 | 109 | 57.0 | 43.1 | 59.9 |
| (WY) | 1955 | 1991 | 1983 | 1993 | 1997 | 1979 | 1999 | 2002 | 1993 | 1996 | 1968 | 1993 |
| MIN | 0.000 | 0.25 | 0.59 | 0.36 | 0.51 | 3.26 | 3.75 | 2.15 | 0.61 | 0.54 | 0.63 | 0.030 |
| (WY) | 1957 | 1957 | 1957 | 1984 | 1978 | 2000 | 1963 | 1988 | 1988 | 1988 | 1956 | 1956 |
| SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1948 - 2002 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 6234.9 | 8127.62 | ||||
| ANNUAL MEAN | 17.08 | 22.27 | 18.92 | |||
| HIGHEST ANNUAL MEAN | 42.8 | 1993 | ||||
| LOWEST ANNUAL MEAN | 5.77 | 1963 | ||||
| HIGHEST DAILY MEAN | 493 A | Feb 9 | 676 | May 12 | 860 | Jul 13 1957 |
| LOWEST DAILY MEAN | 1.3 | Sep 15 | 0.75 | Aug 31 | 0.00 | B |
| ANNUAL SEVEN-DAY MINIMUM | 1.8 | Aug 9 | 1.0 | Aug 26 | 0.00 | B |
| MAXIMUM PEAK FLOW | 755 | May 12 | 1380 C | Jul 13 1957 | ||
| MAXIMUM PEAK STAGE | 11.49 | May 12 | 11.79 D | Nov 28 1990 | ||
| INSTANTANEOUS LOW FLOW | 0.65 | Sep 1 | ||||
| ANNUAL RUNOFF (CFSM) | 0.74 | 0.96 | 0.82 | |||
| ANNUAL RUNOFF (INCHES) | 10.04 | 13.09 | 11.13 | |||
| 10 PERCENT EXCEEDS | 34 | 47 | 42 | |||
| 50 PERCENT EXCEEDS | 8.3 | 8.7 | 5.1 | |||
| 90 PERCENT EXCEEDS | 2.1 | 2.0 | 1.0 | |||