05540095 DATA: Discharge Tables, 2002

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 1994-2002.
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.

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	71	107	186	61	95	85	100	102	55	44	33	55
2	66	98	132	59	95	89	125	158	46	42	30	62
3	62	89	109	58	89	102	109	117	51	41	30	92
4	67	85	95	57	85	95	94	90	562	38	35	67
5	290	81	88	56	77	85	90	77	1310	37	124	57

6	171	77	83	55	74	88	87	71	728	34	64	50
7	112	75	78	56	77	136	107	66	349	33	46	47
8	89	78	73	54	82	412	270	62	227	31	39	46
9	77	75	68	55	103	743	669	100	157	640	34	48
10	72	71	67	55	231	581	431	83	129	310	33	46

11	87	67	65	55	221	333	266	207	163	158	31	49
12	152	66	64	55	165	243	190	1270	147	100	32	48
13	614	66	178	56	135	196	152	1160	113	71	131	43
14	2020	81	142	58	115	164	128	524	169	57	506	42
15	1550	85	110	57	107	140	111	322	135	48	275	42

16	867	74	100	58	99	118	98	371	102	44	151	42
17	468	65	118	61	92	108	95	564	88	41	97	41
18	317	62	107	58	83	99	91	336	78	38	74	47
19	235	74	105	56	112	88	87	226	70	37	64	56
20	176	69	109	55	434	85	139	170	59	34	55	98

21	143	65	94	56	438	79	136	135	59	33	45	107
22	124	61	92	56	272	74	170	112	57	34	469	109
23	559	57	125	66	189	71	121	99	52	32	1020	91
24	798	88	107	69	147	69	114	100	50	30	548	65
25	784	166	89	64	123	66	144	110	55	30	263	52

26	446	129	80	64	110	66	104	97	63	31	177	47
27	278	106	77	66	102	66	121	76	52	41	129	45
28	213	95	74	67	93	63	245	71	49	43	106	42
29	175	99	69	64	---	109	162	66	45	65	84	45
30	143	182	64	66	---	157	122	62	44	51	67	49

31	125	---	63	76	---	109	---	59	---	38	59	---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1969 - 2002, BY WATER YEAR (WY)
MEAN	71.92	92.99	95.71	86.69	116.1	156.2	183.8	139.8	115.7	77.23	90.22	77.60
MAX	366	276	354	250	374	588	396	295	300	283	512	261
(WY)	2002	1986	1983	1999	1997	1979	1983	1974	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 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1969 - 2002
ANNUAL TOTAL	56557		53860
ANNUAL MEAN	155.0		147.6		108.5
HIGHEST ANNUAL MEAN					162	1993
LOWEST ANNUAL MEAN					35.1	1977
HIGHEST DAILY MEAN	2020	Oct 14	2020	Oct 14	2880	Aug 15 1987
LOWEST DAILY MEAN	28	Jul 13,14	30	A	7.8	B
ANNUAL SEVEN-DAY MINIMUM	30	Jul 11	32	Jul 20	10	Oct 20 1971
MAXIMUM PEAK FLOW			2130	Oct 14	3470	Jul 18 1996
MAXIMUM PEAK STAGE			4.79	Oct 14	6.41	Jul 18 1996
INSTANTANEOUS LOW FLOW			28	C
ANNUAL RUNOFF (CFSM)	1.71		1.63		1.20
ANNUAL RUNOFF (INCHES)	23.27		22.16		16.31
10 PERCENT EXCEEDS	290		283		227
50 PERCENT EXCEEDS	88		85		62
90 PERCENT EXCEEDS	40		44		26