05540250 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°43'05", long 88°04'14" (NAD of 1927), in NE1/4SE1/4 sec.3, T.37 N., R.10 E., Will County, Hydrologic Unit 07120004, on downstream side of bridge on Royce Road, 0.5 mi north of Bolingbrook, 4.8 mi northwest of Lemont, and at mile 6.0.

DRAINAGE AREA.-- 75.8 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1988 to current year.
	STAGE: Water years 1994 to current year.
	PARTIAL RECORD: Annual maximum gage height, water years 1962-70 (published as "at Barbers Corners").
PRECIPITATION: May 1989 to September 1995.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 625.28 ft above NGVD of 1929. Prior to Oct. 1, 1988, at datum 17.07 ft higher.

REMARKS.-- Diurnal fluctuation at low flow caused by sewage treatment plants upstream from station. 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, 3,980 ft³/s, July 18, 1996, gage height, 23.75 ft; minimum discharge, 2.4 ft³/s, Aug. 5, 1993.
PRECIPITATION: Maximum recorded, 3.80 in., May 9, 1990 but may have been greater during periods of missing record.

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	41	33	e66	62	46	101	184	79	507	60	49	89
2	37	80	e62	60	46	119	147	71	317	60	48	71
3	44	372	e50	62	49	95	125	65	239	73	54	61
4	47	287	63	61	47	118	109	60	166	124	202	56
5	e41	656	165	67	47	611	97	57	129	79	117	52

6	39	351	137	61	47	484	92	55	106	112	82	53
7	38	e250	93	58	46	278	87	58	92	133	65	53
8	37	e160	81	58	49	191	82	58	81	79	56	47
9	38	77	88	55	49	154	78	55	76	92	54	45
10	37	63	447	54	46	125	74	53	158	166	53	44

11	37	59	426	54	45	110	72	55	391	108	49	44
12	38	54	260	59	47	96	69	52	691	113	50	43
13	38	49	164	58	46	87	68	77	433	79	49	44
14	147	46	128	57	47	114	66	201	251	66	48	41
15	125	42	111	55	47	99	64	236	197	61	47	45

16	75	49	101	53	45	94	62	146	151	54	48	73
17	59	47	89	57	47	95	63	101	123	49	54	55
18	49	432	85	62	46	106	60	122	104	49	68	48
19	46	511	79	54	48	113	60	101	88	50	67	45
20	46	270	73	53	128	127	70	85	78	49	57	46

21	42	e200	70	50	159	112	110	105	108	65	52	46
22	39	e160	70	48	129	100	85	215	158	68	49	42
23	38	e125	70	48	153	89	72	191	110	66	51	27
24	35	e240	67	49	161	132	70	150	96	61	125	30
25	96	e150	63	48	133	147	164	134	92	56	181	29

26	e46	e120	60	49	114	262	112	110	75	54	171	30
27	e39	e100	60	48	98	258	84	89	68	52	186	30
28	e38	e84	79	47	89	240	72	75	69	46	812	28
29	e36	e76	78	47	83	515	66	65	65	47	477	28
30	e35	e72	71	46	---	371	73	259	62	52	191	26

31	37	---	68	45	---	242	---	597	---	52	122	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2004, BY WATER YEAR (WY)
MEAN	86.3	109	83.5	99.3	114	131	154	150	126	92.2	89.4	74.5
MAX	284	179	135	263	306	208	358	286	239	299	155	134
(WY)	2002	1991	1995	1993	1997	1993	1993	1990	1993	1996	1998	2001
MIN	38.4	40.9	23.5	44.5	42.2	52.5	50.5	43.5	43.6	41.7	38.0	41.1
(WY)	1990	2000	1990	2003	1989	2000	1989	1992	1992	1991	1991	1991

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1989 - 2004
ANNUAL TOTAL	33661		38961
ANNUAL MEAN	92.2		106		109
HIGHEST ANNUAL MEAN					152	1993
LOWEST ANNUAL MEAN					76.9	1989
HIGHEST DAILY MEAN	656	Nov 5	812	Aug 28	2700	Jul 18 1996
LOWEST DAILY MEAN	30	Jun 29	26	Sep 30	12	Aug 5 1993
ANNUAL SEVEN-DAY MINIMUM	35	Jun 27	29	Sep 24	18	Aug 16 1992
MAXIMUM PEAK FLOW			989	Aug 28	3980	Jul 18 1996
MAXIMUM PEAK STAGE			20.32	Aug 28	23.75	Jul 18 1996
INSTANTANEOUS LOW FLOW			19	Sep 25	2.4	Aug 5 1993
ANNUAL RUNOFF (CFSM)	1.22		1.40		1.44
ANNUAL RUNOFF (INCHES)	16.52		19.12		19.54
10 PERCENT EXCEEDS	188		200		211
50 PERCENT EXCEEDS	53		68		71
90 PERCENT EXCEEDS	38		44		38