05540095 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°49'21", long 88°10'24" (NAD of 1927), in SW1/4NE1/4 sec.35, T.39 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank 400 ft upstream from Warrenville Forest Preserve Dam in Warrenville, 0.6 mi downstream from Spring Brook, and at mile 38.9.

DRAINAGE AREA.-- 90.4 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1968 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1977-91.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, crest-stage gage and masonry dam. Datum of gage is 688.59 ft above NGVD of 1929 (Illinois Department of Transportation bench mark).

REMARKS.-- Flow slightly regulated by sewage- treatment plants upstream.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,470 ft³/s, July 18, 1996, gage height, 6.41 ft; minimum daily discharge, 7.8 ft³/s, Sept. 14, 1971, Oct. 26, 1972.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of Oct. 11, 1954, reached a stage of 5.54 ft, from floodmark, discharge not determined.

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	46	41	34	35	35	30	60	1050	90	38	71	45
2	79	43	37	34	36	30	54	1240	73	37	145	51
3	73	42	36	33	46	32	49	601	82	36	101	42
4	104	43	35	32	45	32	257	354	75	42	142	38
5	133	46	36	33	35	33	467	873	68	75	84	38

6	83	47	36	35	33	32	255	704	64	96	65	35
7	67	43	36	33	31	33	178	359	63	101	124	34
8	56	43	37	33	27	34	160	264	109	94	77	35
9	48	42	38	33	30	36	135	832	168	110	53	36
10	44	46	37	33	30	35	157	925	104	103	54	37

11	43	49	38	29	28	35	130	640	83	72	48	38
12	41	50	38	31	26	55	107	407	71	53	48	38
13	41	47	35	32	27	95	91	296	65	46	45	38
14	42	47	34	31	29	67	84	247	57	42	40	70
15	43	54	35	29	28	66	77	328	56	151	42	73

16	40	52	37	e29	27	69	71	222	52	119	40	54
17	41	50	36	e28	29	70	67	170	48	86	41	46
18	45	49	80	e28	29	62	61	145	47	176	38	41
19	43	61	136	e29	28	59	59	128	76	92	36	38
20	41	55	77	e29	31	89	64	130	57	66	35	39

21	41	44	57	e28	34	88	61	109	48	144	36	39
22	40	45	46	e26	33	70	58	99	45	98	34	44
23	41	43	40	e28	31	59	53	90	45	66	34	45
24	41	41	38	e29	32	54	51	82	43	47	33	43
25	53	42	36	e29	31	64	48	76	41	39	35	42

26	54	41	33	29	32	65	44	72	45	33	36	46
27	47	41	33	28	31	55	43	72	43	31	37	75
28	46	39	34	30	30	70	47	75	41	38	36	49
29	45	39	33	30	---	121	47	89	38	38	35	41
30	42	36	34	30	---	82	154	85	38	33	33	36

31	42	---	35	31	---	67	---	118	---	31	32	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1969 - 2003, BY WATER YEAR (WY)
MEAN	71.4	91.6	94.2	85.1	114	153	182	146	114	77.1	89.2	76.6
MAX	366	276	354	250	374	588	396	351	300	283	512	261
(WY)	2002	1986	1983	1999	1997	1979	1983	2003	1996	1996	1987	1972
MIN	12.6	16.5	15.1	12.6	21.7	56.8	42.1	39.6	27.0	18.5	17.8	14.8
(WY)	1972	1977	1977	1977	1972	1969	1986	1988	1971	1971	1971	1971

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1969 - 2003
ANNUAL TOTAL	41238		29228
ANNUAL MEAN	113		80.1		108
HIGHEST ANNUAL MEAN					162	1993
LOWEST ANNUAL MEAN					35.1	1977
HIGHEST DAILY MEAN	1310	Jun 5	1240	May 2	2880	Aug 15 1987
LOWEST DAILY MEAN	30	A	26	B	7.8	C
ANNUAL SEVEN-DAY MINIMUM	32	Jul 20	28	Feb 11	10	Oct 20 1971
MAXIMUM PEAK FLOW			1460	May 2	3470	Jul 18 1996
MAXIMUM PEAK STAGE			3.93	May 2	6.41	Jul 18 1996
INSTANTANEOUS LOW FLOW			17	Feb 8
ANNUAL RUNOFF (CFSM)	1.25		0.89		1.19
ANNUAL RUNOFF (INCHES)	16.97		12.03		16.19
10 PERCENT EXCEEDS	213		129		225
50 PERCENT EXCEEDS	63		44		61
90 PERCENT EXCEEDS	37		31		27