05540130 DATA: Discharge Tables, 2004

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 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	40	34	78	77	e50	125	264	95	1210	69	45	87
2	35	75	74	73	e50	166	207	87	650	63	42	68
3	44	348	70	73	e52	148	179	80	366	86	59	61
4	48	324	74	75	e53	175	155	75	243	97	214	56
5	45	649	113	79	e50	869	141	72	196	77	155	53

6	40	341	133	58	e56	970	131	69	165	119	98	49
7	38	178	108	e60	e54	499	120	74	140	90	72	47
8	37	125	98	e59	e54	303	112	70	126	71	59	47
9	33	99	104	e56	e54	228	99	67	112	100	54	42
10	35	87	687	e58	e52	193	94	65	223	174	49	45

11	35	79	810	e62	e50	170	92	90	448	120	47	41
12	33	72	388	63	e52	148	87	97	1220	110	46	40
13	35	64	223	61	e50	135	83	150	954	85	46	42
14	122	55	176	60	e51	150	82	436	456	73	42	41
15	144	54	150	e58	e48	144	78	528	302	63	40	41

16	90	54	132	57	e49	134	74	258	217	61	40	55
17	74	57	119	e56	e50	135	71	178	184	56	57	52
18	56	514	108	e54	e50	144	67	199	160	55	77	42
19	45	620	99	53	e70	152	68	183	134	53	67	38
20	41	302	95	e52	e120	170	88	141	117	53	70	39

21	38	187	94	e50	e180	151	161	208	143	67	54	41
22	35	141	80	e49	164	138	126	481	211	59	48	40
23	35	149	80	e49	174	128	106	712	149	73	46	41
24	36	234	77	e49	194	173	98	366	127	58	90	40
25	84	176	83	e50	166	237	168	242	118	51	97	38

26	59	138	81	e51	149	398	137	197	102	51	132	37
27	45	116	77	e52	130	375	107	160	91	49	141	40
28	45	100	96	e51	116	429	95	137	85	48	535	40
29	39	88	112	e51	112	1070	86	117	80	48	283	38
30	38	82	97	e50	---	776	88	475	74	51	156	38

31	37	---	85	e49	---	383	---	1240	---	48	112	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2004, BY WATER YEAR (WY)
MEAN	115	143	109	133	172	186	233	237	181	118	117	103
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 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1989 - 2004
ANNUAL TOTAL	42697		51961
ANNUAL MEAN	117		142		154
HIGHEST ANNUAL MEAN					202	2002
LOWEST ANNUAL MEAN					98.6	2003
HIGHEST DAILY MEAN	1440	May 2	1240	May 31	4960	Jul 18 1996
LOWEST DAILY MEAN	24	Jul 3	33	Oct 9,12	16	A
ANNUAL SEVEN-DAY MINIMUM	26	Jun 28	35	Oct 7	19	Jun 3 1994
MAXIMUM PEAK FLOW			1580	Jun 12	6620	Jul 18 1996
MAXIMUM PEAK STAGE			8.78	Jun 12	14.31	Jul 18 1996
INSTANTANEOUS LOW FLOW			29	Oct 10,11	4.0	Aug 29 2002
ANNUAL RUNOFF (CFSM)	0.951		1.15		1.25
ANNUAL RUNOFF (INCHES)	12.91		15.72		16.98
10 PERCENT EXCEEDS	216		289		314
50 PERCENT EXCEEDS	63		82		89
90 PERCENT EXCEEDS	34		41		39

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