05540160 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°49'54", long 88°02'51" (NAD of 1927), in SE1/4SW1/4 sec.25, T.39 N., R.10 E., Du Page County, Hydrologic Unit 07120004, on upstream side of bridge on State Highway 56, 2.2 mi northwest of Downers Grove, and at mile 15.0.

DRAINAGE AREA.-- 26.6 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1989 to current year.
	STAGE: Water years 1994 to current year.
	PARTIAL RECORD: Annual maximum, water years 1961-76.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 660.00 ft above NGVD of 1929. Prior to July 19, 1989, at datum 12.21 ft higher.

REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plants upstream from station.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,720 ft³/s, Aug. 26, 1972, gage height, 16.94 ft; minimum discharge, 3.6 ft³/s, Dec. 19, 1989.

REMARKS FOR CURRENT YEAR.-- Records good.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	16	21	23	20	32	472	44	24	74	57
2	41	20	18	21	23	21	28	446	37	23	182	35
3	30	21	19	21	29	20	28	200	43	26	116	28
4	80	20	19	21	38	22	137	128	36	29	114	25
5	52	22	19	21	26	22	211	312	32	54	69	23

6	39	20	19	19	24	22	105	205	32	57	104	22
7	28	21	20	21	23	22	75	114	32	58	141	22
8	23	20	19	21	23	25	65	72	49	61	99	21
9	23	22	19	21	23	24	57	286	66	59	56	21
10	20	25	18	20	23	22	58	285	47	54	40	21

11	21	22	18	20	22	24	48	229	37	39	34	21
12	22	20	18	19	21	42	40	142	33	33	31	21
13	22	19	18	19	21	47	35	89	30	28	31	21
14	22	22	19	18	21	38	31	72	29	26	32	52
15	21	23	19	18	22	35	30	74	27	117	29	36

16	20	21	20	18	20	35	28	60	26	62	26	29
17	20	22	19	18	21	35	26	51	26	76	29	24
18	22	21	86	18	20	31	26	45	35	138	25	21
19	20	25	88	18	20	30	26	42	39	64	25	21
20	21	23	43	18	21	39	28	47	28	58	26	19

21	20	24	32	18	22	36	26	40	28	146	24	18
22	19	25	27	18	22	32	25	37	27	60	23	24
23	19	23	24	18	21	30	24	35	27	43	22	21
24	19	22	23	18	21	30	24	33	25	38	21	21
25	28	21	22	18	20	32	24	31	25	31	22	20

26	25	21	22	18	20	30	23	30	28	27	24	38
27	22	21	22	18	20	28	23	31	26	26	23	37
28	20	21	21	18	20	45	22	44	25	28	22	26
29	22	21	21	18	---	50	21	41	24	28	25	23
30	26	18	22	19	---	38	100	53	24	25	22	21

31	30	---	22	22	---	33	---	73	---	26	23	---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2003, BY WATER YEAR (WY)
MEAN	42.1	46.2	36.8	45.6	54.1	55.3	72.0	71.7	56.2	39.2	41.2	35.5
MAX	142	92.8	56.2	100	138	87.8	139	123	97.2	96.5	63.4	83.3
(WY)	2002	1991	1991	1993	1997	1993	1993	2003	1993	1996	1998	2001
MIN	18.5	20.5	16.3	19.2	22.5	29.9	33.3	22.2	21.5	19.9	18.4	19.7
(WY)	1990	2000	1990	2003	2003	1996	1990	1992	1992	1991	1991	1995

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1990 - 2003
ANNUAL TOTAL	16886		14562
ANNUAL MEAN	46.3		39.9		49.6
HIGHEST ANNUAL MEAN					64.1	1993
LOWEST ANNUAL MEAN					38.5	1994
HIGHEST DAILY MEAN	450	May 12	472	May 1	961	Oct 14 2001
LOWEST DAILY MEAN	16	Dec 1	16	Dec 1	11	A
ANNUAL SEVEN-DAY MINIMUM	18	Nov 30	18	Jan 14	12	Aug 14 1992
MAXIMUM PEAK FLOW			538	May 1	1040	Oct 14 2001
MAXIMUM PEAK STAGE			13.78	May 1	16.28	Oct 14 2001
INSTANTANEOUS LOW FLOW			8.4	Feb 16	3.6	Dec 19 1989
ANNUAL RUNOFF (CFSM)	1.74		1.50		1.86
ANNUAL RUNOFF (INCHES)	23.62		20.36		25.33
10 PERCENT EXCEEDS	79		67		91
50 PERCENT EXCEEDS	29		25		32
90 PERCENT EXCEEDS	20		19		19

A - Aug. 19, Oct. 7, 1992.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	16	21	23	20	32	472	44	24	74	57
2	41	20	18	21	23	21	28	446	37	23	182	35
3	30	21	19	21	29	20	28	200	43	26	116	28
4	80	20	19	21	38	22	137	128	36	29	114	25
5	52	22	19	21	26	22	211	312	32	54	69	23

6	39	20	19	19	24	22	105	205	32	57	104	22
7	28	21	20	21	23	22	75	114	32	58	141	22
8	23	20	19	21	23	25	65	72	49	61	99	21
9	23	22	19	21	23	24	57	286	66	59	56	21
10	20	25	18	20	23	22	58	285	47	54	40	21

11	21	22	18	20	22	24	48	229	37	39	34	21
12	22	20	18	19	21	42	40	142	33	33	31	21
13	22	19	18	19	21	47	35	89	30	28	31	21
14	22	22	19	18	21	38	31	72	29	26	32	52
15	21	23	19	18	22	35	30	74	27	117	29	36

16	20	21	20	18	20	35	28	60	26	62	26	29
17	20	22	19	18	21	35	26	51	26	76	29	24
18	22	21	86	18	20	31	26	45	35	138	25	21
19	20	25	88	18	20	30	26	42	39	64	25	21
20	21	23	43	18	21	39	28	47	28	58	26	19

21	20	24	32	18	22	36	26	40	28	146	24	18
22	19	25	27	18	22	32	25	37	27	60	23	24
23	19	23	24	18	21	30	24	35	27	43	22	21
24	19	22	23	18	21	30	24	33	25	38	21	21
25	28	21	22	18	20	32	24	31	25	31	22	20

26	25	21	22	18	20	30	23	30	28	27	24	38
27	22	21	22	18	20	28	23	31	26	26	23	37
28	20	21	21	18	20	45	22	44	25	28	22	26
29	22	21	21	18	---	50	21	41	24	28	25	23
30	26	18	22	19	---	38	100	53	24	25	22	21

31	30	---	22	22	---	33	---	73	---	26	23	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	16	21	23	20	32	472	44	24	74	57
2	41	20	18	21	23	21	28	446	37	23	182	35
3	30	21	19	21	29	20	28	200	43	26	116	28
4	80	20	19	21	38	22	137	128	36	29	114	25
5	52	22	19	21	26	22	211	312	32	54	69	23

6	39	20	19	19	24	22	105	205	32	57	104	22
7	28	21	20	21	23	22	75	114	32	58	141	22
8	23	20	19	21	23	25	65	72	49	61	99	21
9	23	22	19	21	23	24	57	286	66	59	56	21
10	20	25	18	20	23	22	58	285	47	54	40	21

11	21	22	18	20	22	24	48	229	37	39	34	21
12	22	20	18	19	21	42	40	142	33	33	31	21
13	22	19	18	19	21	47	35	89	30	28	31	21
14	22	22	19	18	21	38	31	72	29	26	32	52
15	21	23	19	18	22	35	30	74	27	117	29	36

16	20	21	20	18	20	35	28	60	26	62	26	29
17	20	22	19	18	21	35	26	51	26	76	29	24
18	22	21	86	18	20	31	26	45	35	138	25	21
19	20	25	88	18	20	30	26	42	39	64	25	21
20	21	23	43	18	21	39	28	47	28	58	26	19

21	20	24	32	18	22	36	26	40	28	146	24	18
22	19	25	27	18	22	32	25	37	27	60	23	24
23	19	23	24	18	21	30	24	35	27	43	22	21
24	19	22	23	18	21	30	24	33	25	38	21	21
25	28	21	22	18	20	32	24	31	25	31	22	20

26	25	21	22	18	20	30	23	30	28	27	24	38
27	22	21	22	18	20	28	23	31	26	26	23	37
28	20	21	21	18	20	45	22	44	25	28	22	26
29	22	21	21	18	---	50	21	41	24	28	25	23
30	26	18	22	19	---	38	100	53	24	25	22	21

31	30	---	22	22	---	33	---	73	---	26	23	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	21	23	16	21	23	20	32	472	44	24	74	57
2	41	20	18	21	23	21	28	446	37	23	182	35
3	30	21	19	21	29	20	28	200	43	26	116	28
4	80	20	19	21	38	22	137	128	36	29	114	25
5	52	22	19	21	26	22	211	312	32	54	69	23

6	39	20	19	19	24	22	105	205	32	57	104	22
7	28	21	20	21	23	22	75	114	32	58	141	22
8	23	20	19	21	23	25	65	72	49	61	99	21
9	23	22	19	21	23	24	57	286	66	59	56	21
10	20	25	18	20	23	22	58	285	47	54	40	21

11	21	22	18	20	22	24	48	229	37	39	34	21
12	22	20	18	19	21	42	40	142	33	33	31	21
13	22	19	18	19	21	47	35	89	30	28	31	21
14	22	22	19	18	21	38	31	72	29	26	32	52
15	21	23	19	18	22	35	30	74	27	117	29	36

16	20	21	20	18	20	35	28	60	26	62	26	29
17	20	22	19	18	21	35	26	51	26	76	29	24
18	22	21	86	18	20	31	26	45	35	138	25	21
19	20	25	88	18	20	30	26	42	39	64	25	21
20	21	23	43	18	21	39	28	47	28	58	26	19

21	20	24	32	18	22	36	26	40	28	146	24	18
22	19	25	27	18	22	32	25	37	27	60	23	24
23	19	23	24	18	21	30	24	35	27	43	22	21
24	19	22	23	18	21	30	24	33	25	38	21	21
25	28	21	22	18	20	32	24	31	25	31	22	20

26	25	21	22	18	20	30	23	30	28	27	24	38
27	22	21	22	18	20	28	23	31	26	26	23	37
28	20	21	21	18	20	45	22	44	25	28	22	26
29	22	21	21	18	---	50	21	41	24	28	25	23
30	26	18	22	19	---	38	100	53	24	25	22	21

31	30	---	22	22	---	33	---	73	---	26	23	---