05536340 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05536340 MIDLOTHIAN CREEK AT OAK FOREST, IL

LOCATION.-- Lat 41°36'51", long 87°43'46", in SE1/4NW1/4 sec.15, T.36 N., R.13 E., Cook County, Hydrologic Unit 07120003, on right bank at downstream side of bridge on Kilbourn Avenue in Oak Forest, and at mile 5.9.

DRAINAGE AREA.-- 12.6 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1950 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 1994-2001.

REVISED RECORDS.-- WSP 1337: 1951-53: WSP 1911: Drainage area.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 620.41 ft above sea level (Cook County Highway Department bench mark).

REMARKS.-- Diurnal fluctuation at low flow caused by small industrial plants upstream. Retention pond 1.0 mi upstream detains water during periods of heavy runoff and gradually releases water during the recession. Flow bypassed gage from Nov. 21, 1962, to Mar. 2, 1963, due to diversion 1.0 mi upstream.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 627 ft³/s, Apr. 22, 1973, gage height, 7.67 ft; maximum gage height, 9.00 ft, July 13, 1957, discharge, 550 ft³/s; no flow at times in most years.

REMARKS FOR CURRENT YEAR.-- Records fair except those for Oct. 5 to Aug. 22, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.4	1.1	6.6	e1.3	32	e20	5.8	8.4	19	e1.7	4.7	3.3
2	1.7	.98	6.5	e1.3	e17	e16	5.6	7.6	14	e1.4	72	1.8
3	2.6	e1.0	5.7	e1.4	e10	e14	5.3	7.1	12	e6.2	91	1.3
4	50	e1.0	e4.8	e1.4	e7.4	11	5.0	6.4	10	e8.4	43	1.2
5	20	1.0	e3.8	e1.4	e6.4	9.4	4.7	5.6	21	e4.0	16	1.1

6	13	e1.0	e2.8	e1.4	e6.0	8.6	6.9	4.7	35	e2.5	12	1.6
7	e6.8	13	2.2	e1.4	8.8	7.8	9.4	5.4	19	e2.5	e6.8	4.0
8	7.4	2.6	e1.5	e1.4	25	7.4	9.0	6.9	12	e1.9	4.0	1.7
9	4.6	53	e1.6	e1.3	219	7.0	8.5	6.7	9.1	e1.5	3.6	7.1
10	4.3	85	e1.3	e1.3	214	6.3	8.5	6.1	7.6	e1.3	7.6	5.5

11	2.2	13	e1.4	e1.3	144	6.0	7.9	6.6	7.4	e1.2	3.6	2.2
12	e1.9	7.5	e2.2	e1.3	57	6.1	11	7.3	10	e.98	2.3	1.6
13	2.1	15	e2.0	e1.4	29	7.2	12	7.1	11	e.80	2.8	1.3
14	1.9	10	e1.8	e10	28	7.2	11	5.7	9.4	1.2	2.7	1.1
15	1.5	16	e1.7	e40	28	11	19	e4.3	18	.68	2.2	.99

16	1.8	11	e1.6	30	23	30	21	e3.9	15	.70	8.2	.65
17	1.9	4.4	e1.5	24	18	31	15	e4.4	11	2.1	4.7	1.4
18	e1.8	e2.8	e1.4	21	e14	30	13	e4.4	8.5	3.3	7.7	3.5
19	e1.8	2.2	e1.4	16	e12	24	12	e3.3	7.4	2.1	9.5	43
20	e1.7	e2.0	e1.3	9.8	e11	20	11	e2.8	6.6	2.1	6.6	14

21	e1.8	e1.9	e1.3	e7.0	e10	16	14	3.3	6.5	14	e3.2	7.6
22	e2.1	e1.8	e1.3	e5.6	e9.0	16	20	5.6	9.2	74	1.1	3.6
23	e2.9	e1.7	e1.2	e4.7	e8.5	11	20	4.4	12	69	1.1	8.0
24	e9.0	e1.7	e1.2	e4.1	35	9.3	17	8.7	9.5	32	1.2	11
25	e7.0	2.9	e1.2	e3.8	115	8.6	14	13	7.8	21	44	5.4

26	e5.2	8.2	e1.2	e3.5	69	7.7	12	26	6.6	20	57	3.5
27	e3.8	7.5	e1.2	e3.3	37	7.2	11	68	e5.6	21	20	2.4
28	2.7	6.1	e1.2	e3.2	23	6.9	11	38	e4.9	18	5.9	2.0
29	1.8	7.5	e1.2	13	---	6.9	11	17	e2.3	6.3	2.7	1.6
30	1.5	7.2	e1.2	94	---	6.5	9.8	13	e2.2	5.1	4.0	1.2

31	1.4	---	e1.3	62	---	6.3	---	11	---	5.0	11	---

TOTAL	169.6	290.08	66.6	372.6	1216.1	382.4	341.4	322.7	329.6	331.96	462.2	144.64
MEAN	5.47	9.67	2.15	12.0	43.4	12.3	11.4	10.4	11.0	10.7	14.9	4.82
MAX	50	85	6.6	94	219	31	21	68	35	74	91	43
MIN	1.4	.98	1.2	1.3	6.0	6.0	4.7	2.8	2.2	.68	1.1	.65
CFSM	.43	.77	.17	.95	3.45	.98	.90	.83	.87	.85	1.18	.38
IN.	.50	.86	.20	1.10	3.59	1.13	1.01	.95	.97	.98	1.36	.43

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2001, BY WATER YEAR (WY)
MEAN	6.82	9.98	11.0	10.7	14.1	22.0	21.5	15.7	13.4	8.99	6.24	7.38
MAX	70.9	40.7	70.9	43.9	68.9	86.9	53.5	46.1	60.0	67.8	22.0	43.6
(WY)	1955	1986	1983	1993	1997	1979	1973	1990	1981	1996	1979	1977
MIN	.035	.17	.000	.000	.000	3.13	1.41	1.84	.88	.29	.25	.11
(WY)	1964	1965	1963	1963	1963	1964	1963	1968	1965	1964	1966	1963

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1951 - 2001
ANNUAL TOTAL	4436.18		4429.88
ANNUAL MEAN	12.1		12.1		12.3
HIGHEST ANNUAL MEAN					21.0	1993
LOWEST ANNUAL MEAN					2.68	1963
HIGHEST DAILY MEAN	171	Jun 15	219	Feb 9	448	Oct 11 1954
LOWEST DAILY MEAN	.98	Nov 2	.65	Sep 16	.00	A
ANNUAL SEVEN-DAY MINIMUM	1.1	Oct 31	.98 B	Jul 10	.00	Nov 22 1962
MAXIMUM PEAK FLOW			234	Feb 9	627 C	Apr 22 1973
MAXIMUM PEAK STAGE			4.27	Feb 9	9.00 D	Jul 13 1957
ANNUAL RUNOFF (CFSM)	.96		.96		.98
ANNUAL RUNOFF (INCHES)	13.10		13.08		13.26
10 PERCENT EXCEEDS	29		24		31
50 PERCENT EXCEEDS	4.0		6.5		3.6
90 PERCENT EXCEEDS	1.4		1.3		.53

	A- At times in most years.
	B- Estimated.
	C- Gage height, 7.67 ft.
	D- Discharge, 550 ft³/s.