05540095 DATA: Discharge Tables, 2004

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

1	32	35	56	58	e30	126	257	73	1010	68	35	59
2	31	65	53	54	e31	173	195	65	521	64	35	47
3	32	272	50	52	e31	142	164	60	325	74	39	43
4	37	211	50	54	e30	144	140	57	231	88	197	40
5	33	496	97	59	e29	844	126	53	174	69	120	37

6	32	258	104	45	e30	903	115	53	142	58	74	35
7	31	117	82	48	e32	444	103	53	120	58	54	37
8	29	75	71	46	e34	299	95	51	105	55	45	36
9	29	60	73	45	e35	221	88	49	92	77	42	36
10	28	53	631	43	e32	175	85	51	173	132	42	36

11	28	47	740	44	e34	140	79	83	401	85	40	32
12	28	43	338	47	e33	118	69	75	803	72	41	33
13	32	39	212	46	e33	102	67	157	771	62	40	34
14	97	36	156	44	e33	119	63	407	364	54	37	33
15	107	36	125	43	e34	110	63	477	260	47	36	34

16	65	37	108	43	e34	98	60	234	189	47	38	43
17	49	37	95	45	e33	98	57	156	160	43	44	39
18	39	369	82	48	e33	110	54	208	135	44	47	34
19	34	537	73	45	51	123	57	163	109	42	58	34
20	33	245	65	44	110	141	68	127	95	40	53	35

21	34	136	61	38	201	122	139	241	130	42	43	35
22	33	90	59	36	160	107	104	546	226	52	40	36
23	32	95	61	36	193	100	82	676	155	56	40	35
24	32	232	60	38	212	168	73	336	129	45	50	34
25	44	137	68	35	161	226	150	247	118	41	66	33

26	39	97	64	36	143	409	111	191	104	43	60	34
27	37	76	60	35	117	353	85	150	89	39	79	34
28	37	67	82	32	107	373	75	125	82	39	286	34
29	34	60	94	32	101	1030	68	101	78	38	214	33
30	34	55	76	e32	---	654	67	431	74	37	115	34

31	34	---	66	e32	---	356	---	1140	---	38	81	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1969 - 2004, BY WATER YEAR (WY)
MEAN	70.5	92.9	95.2	83.9	113	157	179	148	118	76.5	88.7	75.5
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 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1969 - 2004
ANNUAL TOTAL	34236		43540
ANNUAL MEAN	93.8		119		108
HIGHEST ANNUAL MEAN					162	1993
LOWEST ANNUAL MEAN					35.1	1977
HIGHEST DAILY MEAN	1240	May 2	1140	May 31	2880	Aug 15 1987
LOWEST DAILY MEAN	26	A	28	Oct 10-12	7.8	B
ANNUAL SEVEN-DAY MINIMUM	28	Feb 11	29	Oct 6	10	Oct 20 1971
MAXIMUM PEAK FLOW			1240	May 31	3470	Jul 18 1996
MAXIMUM PEAK STAGE			3.69	May 31	6.41	Jul 18 1996
INSTANTANEOUS LOW FLOW			14 C	Jan 30
ANNUAL RUNOFF (CFSM)	1.04		1.32		1.19
ANNUAL RUNOFF (INCHES)	14.09		17.92		16.23
10 PERCENT EXCEEDS	158		246		226
50 PERCENT EXCEEDS	49		61		61
90 PERCENT EXCEEDS	30		33		27