05540130 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°43'13", long 88°07'55" (NAD of 1927), in SW1/4NE1/4 sec.6, T.37 N., R.10 E., Will County, Hydrologic Unit 07120004, on downstream side of bridge on Washington Street, 3.5 mi southeast of Naperville, and at mile 29.3.

DRAINAGE AREA.-- 123 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1988 to current year.
	STAGE: Water years 1994 to current year.
PRECIPITATION: May 1989 to current year.

GAGE.-- Water-stage recorder, phone telemeter, unheated tipping-bucket rain gage, and crest-stage gage. Datum of gage is 630.00 ft above NGVD of 1929. Water years 1989 to 1995 datum incorrectly published as 625.28 ft above NGVD of 1929.

REMARKS.-- For precipitation records, snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,620 ft³/s, July 18, 1996, gage height, 14.31 ft; minimum discharge, 4.0 ft³/s, August 29, 2002.
PRECIPITATION: Maximum daily total, 5.34 in., August 4, 1998.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

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	22	49	e38	39	e50	e53	82	1100	99	26	137	84
2	56	49	e36	36	e52	e52	73	1440	77	25	203	69
3	59	48	e37	35	e59	e59	68	860	90	24	270	48
4	107	47	39	e35	e62	e60	292	464	80	26	224	38
5	178	55	43	37	e50	e58	574	950	66	96	158	34

6	109	56	e46	39	e43	e58	334	896	62	172	139	32
7	83	51	e45	39	e42	e59	226	452	61	142	173	29
8	68	48	e46	37	e41	e61	197	316	118	125	138	30
9	57	49	e48	36	e42	e62	165	984	194	132	96	33
10	51	52	e47	34	e42	e61	177	1090	134	116	72	29

11	49	52	e44	e32	e42	e70	155	816	98	91	58	29
12	46	54	e43	e34	e40	110	127	506	81	58	51	29
13	44	54	e42	e36	e37	150	105	353	69	41	47	30
14	44	54	38	e39	e38	102	94	286	58	37	43	104
15	49	58	37	e41	e38	94	87	334	53	241	41	103

16	48	55	38	e41	e52	93	79	263	49	199	41	62
17	46	49	38	e42	e45	96	71	196	43	196	42	47
18	54	48	163	e42	e42	92	65	161	50	315	41	39
19	53	64	223	e43	e39	91	61	139	77	160	37	34
20	48	69	126	e43	e40	127	69	143	65	120	33	32

21	47	63	90	e43	e40	124	65	118	45	211	35	31
22	49	57	69	e42	e42	99	64	101	37	159	32	42
23	47	55	e50	e42	e42	86	60	89	35	107	31	41
24	50	52	e45	e43	e41	76	57	80	32	81	30	38
25	72	50	e42	e43	e41	78	57	71	30	63	31	35

26	79	49	e40	e43	e40	88	54	63	29	54	36	72
27	64	48	e39	e44	e41	73	53	62	32	48	35	96
28	60	e42	39	e44	e47	92	57	67	29	80	34	70
29	62	e40	38	e43	---	148	57	82	27	70	33	48
30	56	e39	39	e44	---	113	182	96	25	53	30	43

31	51	---	40	e48	---	93	---	146	---	50	30	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2003, BY WATER YEAR (WY)
MEAN	119	141	106	138	178	179	241	237	174	121	118	106
MAX	534	290	187	315	518	316	449	449	368	456	202	332
(WY)	2002	1996	1991	1999	1997	1990	1993	1990	1996	1996	2002	2001
MIN	30.5	38.3	33.5	40.0	43.9	73.0	69.5	62.6	32.7	39.5	35.7	40.9
(WY)	1990	2000	1990	2003	2003	2000	1989	1989	1992	1991	1991	1991

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1989 - 2003
ANNUAL TOTAL	55227		36005
ANNUAL MEAN	151		98.6		155
HIGHEST ANNUAL MEAN					202	2002
LOWEST ANNUAL MEAN					98.6	2003
HIGHEST DAILY MEAN	1660	May 12,13	1440	May 2	4960	Jul 18 1996
LOWEST DAILY MEAN	16	Sep 28	22	Oct 1	16	A
ANNUAL SEVEN-DAY MINIMUM	22	Sep 25	26	Jun 28	19	Jun 3 1994
MAXIMUM PEAK FLOW			1530	May 2	6620	Jul 18 1996
MAXIMUM PEAK STAGE			8.63	May 2	14.31	Jul 18 1996
INSTANTANEOUS LOW FLOW					4.0	Aug 29 2002
ANNUAL RUNOFF (CFSM)	1.23		0.80		1.26
ANNUAL RUNOFF (INCHES)	16.70		10.89		17.07
10 PERCENT EXCEEDS	305		172		314
50 PERCENT EXCEEDS	75		53		90
90 PERCENT EXCEEDS	39		35		39

A - Oct. 13, 1989, Sept. 28, 2002.