05540250 DATA: Discharge Tables, 1999

Station list Available data
ILLINOIS RIVER BASIN

05540250 EAST BRANCH DU PAGE RIVER AT BOLINGBROOK, IL

LOCATION.--Lat 41°43'05", long 88°04'14", 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.--Annual maximum gage height, water years 1962-70 (published as "at Barbers Corners"). October 1988 to current year.

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

REMARKS.--Records good except those for estimated daily discharges, which are poor. Diurnal fluctuation at low flow caused by sewage treatment plants upstream from station. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	97	85	99	49	177	130	78	272	147	203	49	44
2	75	79	71	43	236	119	71	217	420	166	49	42
3	147	66	65	e44	246	133	71	183	276	117	49	42
4	89	65	62	e45	206	122	77	160	190	100	48	44
5	157	69	59	e46	169	102	75	148	147	88	47	42

6	173	66	118	49	151	120	77	164	133	79	47	42
7	126	64	333	49	e150	122	72	175	135	70	53	38
8	104	64	206	48	e126	117	77	151	101	65	56	37
9	73	64	147	49	120	124	351	131	98	80	50	39
10	65	332	e110	49	116	123	264	115	86	99	48	38

11	63	332	e100	49	132	128	210	121	120	77	46	41
12	62	209	e90	48	190	131	162	533	236	69	64	39
13	60	154	e86	46	147	142	133	449	327	64	65	46
14	55	e120	e82	47	125	136	106	287	451	59	60	41
15	56	e100	e78	48	119	139	132	203	330	57	51	39

16	55	e90	e74	49	112	178	476	164	224	55	47	37
17	198	e80	e72	66	110	256	436	274	168	74	47	40
18	885	e54	68	161	104	251	297	299	140	81	45	42
19	720	e66	62	115	97	191	223	216	120	78	96	42
20	340	e66	59	89	95	151	180	167	100	72	68	42

21	194	e66	61	94	87	132	158	166	89	78	58	40
22	139	e66	56	547	86	122	214	518	98	105	52	36
23	113	e64	55	906	81	111	678	398	141	75	50	36
24	99	62	54	1080	79	103	658	328	173	77	88	38
25	91	67	51	642	74	102	448	245	117	68	201	40

26	77	68	51	367	80	92	320	194	97	63	113	39
27	82	61	51	292	154	83	386	154	152	59	69	51
28	142	59	53	310	161	79	720	128	188	56	59	238
29	107	56	53	247	---	83	524	115	155	54	54	266
30	114	90	51	205	---	78	364	100	110	53	48	148

31	101	---	51	186	---	75	---	106	---	52	45	---

TOTAL	4859	2884	2628	6065	3730	3975	8038	6881	5269	2493	1922	1749
MEAN	157	96.1	84.8	196	133	128	268	222	176	80.4	62.0	58.3
MAX	885	332	333	1080	246	256	720	533	451	203	201	266
MIN	55	54	51	43	74	75	71	100	86	52	45	36
CFSM	2.07	1.27	1.12	2.58	1.76	1.69	3.53	2.93	2.32	1.06	.82	.77
IN.	2.38	1.42	1.29	2.98	1.83	1.95	3.94	3.38	2.59	1.22	.94	.86

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 1999, BY WATER YEAR (WY)
MEAN	78.4	118	87.3	118	116	140	164	149	124	92.8	87.7	72.8
MAX	157	179	135	263	306	208	358	286	239	299	155	114
(WY)	1999	1991	1995	1993	1997	1993	1993	1990	1993	1996	1998	1989
MIN	38.4	44.0	23.5	53.3	42.2	63.5	50.5	43.5	43.6	41.7	38.0	41.1
(WY)	1990	1990	1990	1994	1989	1996	1989	1992	1992	1991	1991	1991

SUMMARY STATISTICS	FOR 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1989 - 1999
ANNUAL TOTAL	49467		50493
ANNUAL MEAN	136		138		112
HIGHEST ANNUAL MEAN					152	1993
LOWEST ANNUAL MEAN					76.9	1989
HIGHEST DAILY MEAN	1040	May 8	1080	Jan 24	2700	Jul 18 1996
LOWEST DAILY MEAN	39	Aug 2	36	Sep 22,23	12	Aug 5 1993
ANNUAL SEVEN-DAY MINIMUM	45	Jul 28	39	Sep 20	18	Aug 16 1992
INSTANTANEOUS PEAK FLOW			1200	Jan 24	3980	Jul 18 1996
INSTANTANEOUS PEAK STAGE			20.94	Jan 24	23.75	Jul 18 1996
INSTANTANEOUS LOW FLOW			23	A	2.4	Aug 5 1993
ANNUAL RUNOFF (CFSM)	1.79		1.83		1.48
ANNUAL RUNOFF (INCHES)	24.28		24.78		20.13
10 PERCENT EXCEEDS	265		280		218
50 PERCENT EXCEEDS	94		95		74
90 PERCENT EXCEEDS	56		47		37

A - Sept. 8, 16, 22, 23.