05540250 DATA: Discharge Tables, 2003

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 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	49	48	37	49	53	38	63	504	126	37	86	118
2	78	43	39	49	51	40	52	536	92	37	202	103
3	64	42	43	49	62	41	49	347	110	36	182	63
4	151	42	42	47	74	42	232	210	88	43	215	50
5	134	43	40	48	51	42	376	464	74	114	134	44

6	78	43	40	50	48	42	237	331	69	176	178	41
7	61	42	40	48	44	44	166	213	69	143	314	39
8	47	42	40	48	45	41	147	145	108	130	181	39
9	46	42	42	48	44	42	115	562	131	150	111	37
10	43	47	41	47	41	42	108	472	102	125	74	36

11	43	48	38	45	43	36	92	467	86	86	64	36
12	43	42	38	46	42	77	73	311	71	58	60	35
13	44	39	38	46	41	119	64	211	63	46	56	32
14	45	41	38	44	40	88	55	172	58	45	54	81
15	43	55	39	42	41	77	53	152	51	244	51	74

16	41	44	42	42	39	75	51	130	49	167	47	55
17	40	46	42	43	42	75	49	105	48	114	50	46
18	45	45	180	43	41	67	48	92	51	320	46	41
19	43	55	e338	45	40	62	45	86	97	163	44	40
20	42	49	e192	44	40	87	49	104	55	100	45	36

21	43	48	89	43	42	73	47	82	48	345	43	32
22	41	59	71	e43	42	60	45	73	45	198	40	53
23	39	50	62	e40	41	53	42	69	46	114	35	46
24	39	45	59	e40	43	56	40	62	41	88	34	42
25	55	45	55	e41	43	61	39	55	37	65	37	42

26	52	46	53	e42	41	56	34	52	40	50	40	68
27	46	46	52	e40	40	50	34	53	40	46	39	109
28	44	44	50	e43	39	81	39	71	31	55	37	62
29	44	43	49	40	---	109	39	104	30	53	47	53
30	44	43	52	40	---	76	139	90	36	47	39	45

31	55	---	53	46	---	65	---	231	---	45	38	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2003, BY WATER YEAR (WY)
MEAN	88.7	105	81.5	102	117	127	158	152	123	93.5	87.4	76.4
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 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1989 - 2003
ANNUAL TOTAL	36306		28465
ANNUAL MEAN	99.5		78.0		109
HIGHEST ANNUAL MEAN					152	1993
LOWEST ANNUAL MEAN					76.9	1989
HIGHEST DAILY MEAN	949	May 12	562	May 9	2700	Jul 18 1996
LOWEST DAILY MEAN	37	Dec 1	30	Jun 29	12	Aug 5 1993
ANNUAL SEVEN-DAY MINIMUM	39	Dec 9	35	Jun 27	18	Aug 16 1992
MAXIMUM PEAK FLOW			668	May 9	3980	Jul 18 1996
MAXIMUM PEAK STAGE			19.39	May 9	23.75	Jul 18 1996
INSTANTANEOUS LOW FLOW			19	Jun 28,29	2.4	Aug 5 1993
ANNUAL RUNOFF (CFSM)	1.31		1.03		1.44
ANNUAL RUNOFF (INCHES)	17.82		13.97		19.58
10 PERCENT EXCEEDS	187		150		212
50 PERCENT EXCEEDS	63		48		71
90 PERCENT EXCEEDS	43		39		38