05540130 DATA: Discharge Tables, 2002

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 1994-2002.
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, 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	103	155	235	e77	104	115	135	203	85	41	42	52
2	92	135	174	e74	101	126	188	250	74	40	35	52
3	83	118	148	e72	95	144	161	233	73	37	30	101
4	126	111	131	e72	88	133	139	182	626	47	44	72
5	526	103	121	e68	84	124	128	165	1360	34	212	58

6	308	96	114	e69	81	120	121	162	1110	31	109	48
7	192	93	109	e68	78	179	162	145	469	30	65	43
8	143	94	101	e67	82	472	406	132	305	30	47	40
9	119	90	91	e66	101	964	910	193	223	989	37	40
10	109	85	87	67	235	741	651	171	215	499	31	39

11	133	80	84	65	266	411	393	483	233	247	29	39
12	220	77	89	62	206	309	298	1660	205	156	31	38
13	1230	75	200	60	171	252	240	1660	155	111	169	35
14	2660	103	193	63	148	215	211	792	211	85	653	31
15	2340	107	151	63	137	186	191	474	178	67	409	30

16	1540	92	135	61	127	158	179	505	134	57	220	30
17	684	81	152	e62	121	145	183	782	112	52	139	30
18	451	78	143	e61	112	131	176	480	97	58	101	39
19	345	92	137	e58	161	120	179	335	86	50	85	42
20	265	88	140	e58	466	114	363	261	76	44	75	103

21	221	81	121	58	538	107	282	212	71	40	56	92
22	192	76	117	60	352	95	303	177	67	40	601	74
23	667	72	142	71	254	91	241	159	61	38	1180	84
24	1000	104	133	77	201	88	240	159	55	38	808	42
25	943	201	120	75	169	84	268	169	92	35	336	26

26	611	161	114	72	150	83	208	158	85	38	217	21
27	372	129	100	74	138	82	267	129	65	62	156	19
28	285	109	91	72	125	77	441	119	55	63	125	16
29	236	116	e85	69	---	135	306	113	49	84	94	22
30	198	193	e78	74	---	208	234	104	44	74	76	25

31	175	---	e78	91	---	148	---	96	---	53	58	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2002, BY WATER YEAR (WY)
MEAN	123.0	146.9	109.8	144.9	187.5	185.2	249.0	224.5	181.8	122.1	121.3	110.5
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	48.4	54.8	73.0	69.5	62.6	32.7	39.5	35.7	40.9
(WY)	1990	2000	1990	2000	1989	2000	1989	1989	1992	1991	1991	1991

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1989 - 2002
ANNUAL TOTAL	75396		73693
ANNUAL MEAN	206.6		201.9		158.5
HIGHEST ANNUAL MEAN					202	2002
LOWEST ANNUAL MEAN					110	1989
HIGHEST DAILY MEAN	2660	Oct 14	2660	Oct 14	4960	Jul 18 1996
LOWEST DAILY MEAN	34	Jul 14,Aug 6	16	Sep 28	16	A
ANNUAL SEVEN-DAY MINIMUM	37	Jul 11	24	Sep 24	19	Jun 3 1994
MAXIMUM PEAK FLOW			3090	Oct 13	6620	Jul 18 1996
MAXIMUM PEAK STAGE			10.70	Oct 13	14.31	Jul 18 1996
INSTANTANEOUS LOW FLOW			4.0	Aug 29	4.0	Aug 29 2002
ANNUAL RUNOFF (CFSM)	1.68		1.64		1.29
ANNUAL RUNOFF (INCHES)	22.80		22.29		17.51
10 PERCENT EXCEEDS	375		445		323
50 PERCENT EXCEEDS	120		114		92
90 PERCENT EXCEEDS	53		42		40

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