05537500 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°38'33", long 87°59'57" (NAD of 1927), in SW1/4SE1/4 sec.32, T.37 N., R.11 E., Cook County, Hydrologic Unit 07120004, on left bank at downstream side of bridge on State Street, 2 mi south of Lemont, and at mile 5.4.

DRAINAGE AREA.-- 20.9 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: July 1951 to current year.
	STAGE: Water years 1994-2002.

REVISED RECORDS.-- WSP 1338: 1952(M). WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 637.20 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 5,310 ft³/s, July 18, 1996, from rating curve extended above 2,800 ft³/s, gage height, 11.10 ft; no flow at times in most years.

REMARKS FOR CURRENT YEAR.-- Records good.

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	2.9	11	24	5.8	21	13	15	28	9.4	3.5	1.4	1.7
2	3.8	11	17	5.3	16	15	50	28	8.4	2.9	1.1	1.9
3	3.2	11	14	5.0	13	24	43	21	7.9	2.4	1.2	3.6
4	4.9	9.2	12	5.0	11	22	27	17	21	2.4	1.4	2.1
5	71	8.5	11	5.2	10	18	22	15	27	3.2	7.3	1.7

6	31	7.9	10	5.5	8.4	21	20	22	16	2.2	3.6	1.5
7	15	7.1	9.3	5.2	7.6	57	26	22	12	1.8	2.0	1.5
8	11	8.1	8.8	4.9	8.1	191	132	20	9.3	1.6	1.4	1.6
9	8.9	6.8	7.8	5.2	14	222	303	59	8.0	78	1.3	1.9
10	7.7	6.7	6.9	5.4	63	120	121	35	9.7	22	1.0	2.0

11	8.7	6.1	6.4	5.0	52	69	67	135	26	9.8	1.1	2.2
12	38	5.9	6.3	4.9	36	52	48	569	14	6.2	1.3	2.0
13	142	6.4	11	5.0	32	40	35	263	11	4.7	3.9	1.9
14	337	6.6	12	5.1	24	33	28	108	10	3.7	4.5	1.9
15	119	6.7	16	5.7	22	27	22	60	9.5	3.3	2.4	2.0

16	66	6.0	13	5.4	20	24	19	80	7.9	2.8	2.1	2.1
17	42	5.9	23	6.0	17	21	19	90	6.2	2.0	1.9	1.9
18	29	5.4	22	5.5	16	18	17	48	5.5	2.2	1.6	5.6
19	20	6.2	17	5.1	22	16	15	35	4.7	1.9	2.9	5.3
20	16	6.2	15	5.0	70	16	107	29	4.1	1.8	3.6	7.5

21	13	5.1	12	5.0	55	16	67	24	3.6	1.7	2.1	7.4
22	11	4.8	12	5.2	35	14	60	20	3.5	1.9	9.2	5.3
23	59	4.6	19	9.6	26	13	39	17	3.3	1.6	9.0	4.3
24	63	5.1	16	10	20	13	36	31	3.1	1.3	8.6	3.0
25	71	9.5	13	9.0	17	15	46	29	4.1	1.1	4.6	1.9

26	35	7.4	9.9	7.8	17	13	28	22	7.9	1.2	2.8	1.6
27	23	7.6	9.7	7.4	17	12	54	17	28	2.6	2.0	2.0
28	17	7.3	9.1	7.1	14	12	110	15	9.9	2.3	1.7	1.8
29	14	7.9	7.9	6.8	---	15	54	14	5.9	1.9	1.8	2.0
30	12	28	6.8	7.2	---	21	36	12	4.4	1.7	1.8	2.4

31	12	---	6.3	19	---	16	---	11	---	1.4	1.7	---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2002, BY WATER YEAR (WY)
MEAN	10.26	13.91	16.49	16.76	22.19	34.48	36.91	23.96	18.63	11.37	5.557	7.694
MAX	163	71.9	92.2	75.5	104	131	86.9	74.5	89.6	126	27.4	74.9
(WY)	1955	1986	1983	1993	1997	1979	1975	1966	1993	1996	1972	1961
MIN	0.000	0.006	0.016	0.020	0.028	2.19	1.69	2.83	0.73	0.048	0.000	0.000
(WY)	1965	1972	1964	1977	1964	1964	1963	1958	1988	1961	1964	1963

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1951 - 2002
ANNUAL TOTAL	7610.72		8206.0
ANNUAL MEAN	20.85		22.48		18.11
HIGHEST ANNUAL MEAN					39.9	1993
LOWEST ANNUAL MEAN					3.37	1963
HIGHEST DAILY MEAN	518	Feb 9	569	May 12	2190	Jul 18 1996
LOWEST DAILY MEAN	0.21	Jul 14	1.0	Aug 10	0.00	A
ANNUAL SEVEN-DAY MINIMUM	0.63	Jul 10	1.4	Jul 29	0.00	Aug 27 1953
MAXIMUM PEAK FLOW			811	May 12	5310 B	Jul 18 1996
MAXIMUM PEAK STAGE			6.93	May 12	11.10	Jul 18 1996
INSTANTANEOUS LOW FLOW			0.94	C
ANNUAL RUNOFF (CFSM)	1.00		1.08		0.87
ANNUAL RUNOFF (INCHES)	13.55		14.61		11.77
10 PERCENT EXCEEDS	53		52		42
50 PERCENT EXCEEDS	9.1		9.6		5.3
90 PERCENT EXCEEDS	3.2		1.9		0.11

	A - At times in most years.
	B - From rating curve extended above 2,800 ft³/s.
	C - Aug. 2, 3, 10, and 11.

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	2.9	11	24	5.8	21	13	15	28	9.4	3.5	1.4	1.7
2	3.8	11	17	5.3	16	15	50	28	8.4	2.9	1.1	1.9
3	3.2	11	14	5.0	13	24	43	21	7.9	2.4	1.2	3.6
4	4.9	9.2	12	5.0	11	22	27	17	21	2.4	1.4	2.1
5	71	8.5	11	5.2	10	18	22	15	27	3.2	7.3	1.7

6	31	7.9	10	5.5	8.4	21	20	22	16	2.2	3.6	1.5
7	15	7.1	9.3	5.2	7.6	57	26	22	12	1.8	2.0	1.5
8	11	8.1	8.8	4.9	8.1	191	132	20	9.3	1.6	1.4	1.6
9	8.9	6.8	7.8	5.2	14	222	303	59	8.0	78	1.3	1.9
10	7.7	6.7	6.9	5.4	63	120	121	35	9.7	22	1.0	2.0

11	8.7	6.1	6.4	5.0	52	69	67	135	26	9.8	1.1	2.2
12	38	5.9	6.3	4.9	36	52	48	569	14	6.2	1.3	2.0
13	142	6.4	11	5.0	32	40	35	263	11	4.7	3.9	1.9
14	337	6.6	12	5.1	24	33	28	108	10	3.7	4.5	1.9
15	119	6.7	16	5.7	22	27	22	60	9.5	3.3	2.4	2.0

16	66	6.0	13	5.4	20	24	19	80	7.9	2.8	2.1	2.1
17	42	5.9	23	6.0	17	21	19	90	6.2	2.0	1.9	1.9
18	29	5.4	22	5.5	16	18	17	48	5.5	2.2	1.6	5.6
19	20	6.2	17	5.1	22	16	15	35	4.7	1.9	2.9	5.3
20	16	6.2	15	5.0	70	16	107	29	4.1	1.8	3.6	7.5

21	13	5.1	12	5.0	55	16	67	24	3.6	1.7	2.1	7.4
22	11	4.8	12	5.2	35	14	60	20	3.5	1.9	9.2	5.3
23	59	4.6	19	9.6	26	13	39	17	3.3	1.6	9.0	4.3
24	63	5.1	16	10	20	13	36	31	3.1	1.3	8.6	3.0
25	71	9.5	13	9.0	17	15	46	29	4.1	1.1	4.6	1.9

26	35	7.4	9.9	7.8	17	13	28	22	7.9	1.2	2.8	1.6
27	23	7.6	9.7	7.4	17	12	54	17	28	2.6	2.0	2.0
28	17	7.3	9.1	7.1	14	12	110	15	9.9	2.3	1.7	1.8
29	14	7.9	7.9	6.8	---	15	54	14	5.9	1.9	1.8	2.0
30	12	28	6.8	7.2	---	21	36	12	4.4	1.7	1.8	2.4

31	12	---	6.3	19	---	16	---	11	---	1.4	1.7	---

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	2.9	11	24	5.8	21	13	15	28	9.4	3.5	1.4	1.7
2	3.8	11	17	5.3	16	15	50	28	8.4	2.9	1.1	1.9
3	3.2	11	14	5.0	13	24	43	21	7.9	2.4	1.2	3.6
4	4.9	9.2	12	5.0	11	22	27	17	21	2.4	1.4	2.1
5	71	8.5	11	5.2	10	18	22	15	27	3.2	7.3	1.7

6	31	7.9	10	5.5	8.4	21	20	22	16	2.2	3.6	1.5
7	15	7.1	9.3	5.2	7.6	57	26	22	12	1.8	2.0	1.5
8	11	8.1	8.8	4.9	8.1	191	132	20	9.3	1.6	1.4	1.6
9	8.9	6.8	7.8	5.2	14	222	303	59	8.0	78	1.3	1.9
10	7.7	6.7	6.9	5.4	63	120	121	35	9.7	22	1.0	2.0

11	8.7	6.1	6.4	5.0	52	69	67	135	26	9.8	1.1	2.2
12	38	5.9	6.3	4.9	36	52	48	569	14	6.2	1.3	2.0
13	142	6.4	11	5.0	32	40	35	263	11	4.7	3.9	1.9
14	337	6.6	12	5.1	24	33	28	108	10	3.7	4.5	1.9
15	119	6.7	16	5.7	22	27	22	60	9.5	3.3	2.4	2.0

16	66	6.0	13	5.4	20	24	19	80	7.9	2.8	2.1	2.1
17	42	5.9	23	6.0	17	21	19	90	6.2	2.0	1.9	1.9
18	29	5.4	22	5.5	16	18	17	48	5.5	2.2	1.6	5.6
19	20	6.2	17	5.1	22	16	15	35	4.7	1.9	2.9	5.3
20	16	6.2	15	5.0	70	16	107	29	4.1	1.8	3.6	7.5

21	13	5.1	12	5.0	55	16	67	24	3.6	1.7	2.1	7.4
22	11	4.8	12	5.2	35	14	60	20	3.5	1.9	9.2	5.3
23	59	4.6	19	9.6	26	13	39	17	3.3	1.6	9.0	4.3
24	63	5.1	16	10	20	13	36	31	3.1	1.3	8.6	3.0
25	71	9.5	13	9.0	17	15	46	29	4.1	1.1	4.6	1.9

26	35	7.4	9.9	7.8	17	13	28	22	7.9	1.2	2.8	1.6
27	23	7.6	9.7	7.4	17	12	54	17	28	2.6	2.0	2.0
28	17	7.3	9.1	7.1	14	12	110	15	9.9	2.3	1.7	1.8
29	14	7.9	7.9	6.8	---	15	54	14	5.9	1.9	1.8	2.0
30	12	28	6.8	7.2	---	21	36	12	4.4	1.7	1.8	2.4

31	12	---	6.3	19	---	16	---	11	---	1.4	1.7	---

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	2.9	11	24	5.8	21	13	15	28	9.4	3.5	1.4	1.7
2	3.8	11	17	5.3	16	15	50	28	8.4	2.9	1.1	1.9
3	3.2	11	14	5.0	13	24	43	21	7.9	2.4	1.2	3.6
4	4.9	9.2	12	5.0	11	22	27	17	21	2.4	1.4	2.1
5	71	8.5	11	5.2	10	18	22	15	27	3.2	7.3	1.7

6	31	7.9	10	5.5	8.4	21	20	22	16	2.2	3.6	1.5
7	15	7.1	9.3	5.2	7.6	57	26	22	12	1.8	2.0	1.5
8	11	8.1	8.8	4.9	8.1	191	132	20	9.3	1.6	1.4	1.6
9	8.9	6.8	7.8	5.2	14	222	303	59	8.0	78	1.3	1.9
10	7.7	6.7	6.9	5.4	63	120	121	35	9.7	22	1.0	2.0

11	8.7	6.1	6.4	5.0	52	69	67	135	26	9.8	1.1	2.2
12	38	5.9	6.3	4.9	36	52	48	569	14	6.2	1.3	2.0
13	142	6.4	11	5.0	32	40	35	263	11	4.7	3.9	1.9
14	337	6.6	12	5.1	24	33	28	108	10	3.7	4.5	1.9
15	119	6.7	16	5.7	22	27	22	60	9.5	3.3	2.4	2.0

16	66	6.0	13	5.4	20	24	19	80	7.9	2.8	2.1	2.1
17	42	5.9	23	6.0	17	21	19	90	6.2	2.0	1.9	1.9
18	29	5.4	22	5.5	16	18	17	48	5.5	2.2	1.6	5.6
19	20	6.2	17	5.1	22	16	15	35	4.7	1.9	2.9	5.3
20	16	6.2	15	5.0	70	16	107	29	4.1	1.8	3.6	7.5

21	13	5.1	12	5.0	55	16	67	24	3.6	1.7	2.1	7.4
22	11	4.8	12	5.2	35	14	60	20	3.5	1.9	9.2	5.3
23	59	4.6	19	9.6	26	13	39	17	3.3	1.6	9.0	4.3
24	63	5.1	16	10	20	13	36	31	3.1	1.3	8.6	3.0
25	71	9.5	13	9.0	17	15	46	29	4.1	1.1	4.6	1.9

26	35	7.4	9.9	7.8	17	13	28	22	7.9	1.2	2.8	1.6
27	23	7.6	9.7	7.4	17	12	54	17	28	2.6	2.0	2.0
28	17	7.3	9.1	7.1	14	12	110	15	9.9	2.3	1.7	1.8
29	14	7.9	7.9	6.8	---	15	54	14	5.9	1.9	1.8	2.0
30	12	28	6.8	7.2	---	21	36	12	4.4	1.7	1.8	2.4

31	12	---	6.3	19	---	16	---	11	---	1.4	1.7	---