05540275 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05540275 SPRING BROOK AT 87TH STREET NEAR NAPERVILLE, IL

LOCATION.-- Lat 41°43'33", long 88°09'49", in SW1/4SW1/4 sec.36, T.38 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank at upstream side of bridge on 87th Street, 3.0 mi south of Naperville, and at mile 2.9.

DRAINAGE AREA.-- 9.90 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1987 to current year.

STAGE: Water years 1994-2001.

SURFACE-WATER QUALITY

CHEMICAL: October 1987 to current year.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 647.00 ft above sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,750 ft³/s, July 18, 1996, gage height, 10.77 ft; no flow, Oct. 11, 1988.

REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	2.8	1.4	e5.2	e1.9	30	19	4.3	9.0	22	.96	4.4	28
2	2.1	1.9	e4.5	e1.8	33	17	4.2	7.3	18	.73	3.7	18
3	1.6	2.2	e3.8	e1.8	18	15	4.2	6.1	12	1.2	3.0	13
4	17	1.9	e3.3	e1.9	16	14	3.8	5.4	8.9	1.3	2.4	10
5	8.9	1.6	e3.1	e1.9	15	11	4.3	4.8	24	1.3	1.9	6.7

6	7.0	2.9	e2.9	e2.0	14	9.4	13	4.7	37	1.2	1.6	6.6
7	9.1	32	e2.8	e2.0	12	8.2	14	5.6	28	1.2	1.4	17
8	9.6	16	e2.7	e2.0	22	7.1	9.7	5.8	20	1.3	1.2	10
9	7.6	49	e2.7	e2.0	180	6.1	14	4.8	10	1.2	1.1	17
10	6.2	54	e2.5	e2.0	85	5.5	18	5.5	7.6	1.0	1.4	16

11	5.2	34	e2.2	e2.1	40	5.6	19	13	5.9	.80	1.2	11
12	4.5	24	e2.0	e3.0	31	6.5	20	9.9	6.8	.61	.96	7.8
13	3.9	23	e1.9	7.4	27	7.7	11	6.7	6.8	.47	.73	4.4
14	3.1	19	e2.0	12	31	6.9	8.2	6.6	5.4	.33	.53	2.9
15	3.1	15	e2.1	17	30	13	25	5.5	4.9	.31	.46	2.2

16	2.6	13	e2.2	16	26	26	26	4.8	4.0	.31	3.0	1.9
17	2.6	11	e2.2	15	e22	27	21	4.1	3.5	.32	3.7	1.7
18	2.4	8.9	e2.1	13	e19	26	17	4.7	3.1	.40	3.6	1.6
19	2.2	7.3	e2.0	12	16	22	14	3.3	2.8	.40	4.2	51
20	1.8	5.8	e1.9	9.4	15	18	18	2.9	2.3	.38	3.4	46

21	1.9	5.7	e1.9	e7.5	e13	13	49	4.0	2.4	.46	2.8	41
22	1.9	5.7	e1.9	e6.4	10	10	43	5.0	2.3	6.8	3.2	31
23	1.9	3.6	e1.9	e5.8	8.9	8.9	42	4.7	2.2	16	3.0	34
24	2.0	3.1	e1.8	e5.0	30	7.7	48	4.3	2.1	9.7	2.7	45
25	2.2	3.2	e1.7	e5.0	54	6.5	38	4.8	1.6	45	20	34

26	2.6	7.3	e1.8	e5.0	32	5.5	32	12	1.6	44	41	27
27	2.0	7.7	e1.8	e5.2	27	5.1	27	25	1.6	27	22	21
28	1.7	6.7	e1.8	e5.6	21	4.8	22	15	1.3	16	12	16
29	1.6	6.6	e1.8	8.8	---	4.5	14	10	1.3	9.2	8.7	14
30	1.6	6.0	e1.9	42	---	4.3	11	7.1	1.1	6.1	4.7	11

31	1.6	---	e1.9	35	---	4.2	---	7.0	---	5.3	34	---

TOTAL	124.3	379.5	74.3	257.5	877.9	345.5	594.7	219.4	250.5	201.28	197.98	546.8
MEAN	4.01	12.6	2.40	8.31	31.4	11.1	19.8	7.08	8.35	6.49	6.39	18.2
MAX	17	54	5.2	42	180	27	49	25	37	45	41	51
MIN	1.6	1.4	1.7	1.8	8.9	4.2	3.8	2.9	1.1	.31	.46	1.6
CFSM	.41	1.28	.24	.84	3.17	1.13	2.00	.71	.84	.66	.65	1.84
IN.	.47	1.43	.28	.97	3.30	1.30	2.23	.82	.94	.76	.74	2.05

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2001, BY WATER YEAR (WY)
MEAN	4.73	10.3	8.28	11.6	13.0	12.9	17.4	14.7	12.6	11.7	6.45	6.05
MAX	18.2	20.1	22.6	30.7	44.3	26.1	34.0	46.3	31.3	78.1	27.6	18.2
(WY)	1999	1993	1988	1993	1997	1990	1993	1990	1993	1996	1998	2001
MIN	.70	.58	.69	2.34	3.22	2.36	4.03	1.57	.78	.39	.22	.36
(WY)	1993	2000	1990	2000	1996	2000	1989	1989	1988	1988	1991	1988

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1988 - 2001
ANNUAL TOTAL	3800.38		4069.66
ANNUAL MEAN	10.4		11.1		10.8
HIGHEST ANNUAL MEAN					15.7	1993
LOWEST ANNUAL MEAN					6.40	1994
HIGHEST DAILY MEAN	144	Apr 21	180	Feb 9	1370	Jul 18 1996
LOWEST DAILY MEAN	.34	Mar 14	.31	Jul 15,16	.00	Oct 11 1988
ANNUAL SEVEN-DAY MINIMUM	.58	Mar 9	.35	Jul 14	.05	Oct 9 1988
MAXIMUM PEAK FLOW			208	Feb 9	1750	Jul 18 1996
MAXIMUM PEAK STAGE			6.25	Feb 9	10.77	Jul 18 1996
INSTANTANEOUS LOW FLOW			.18	Jul 14,16,17
ANNUAL RUNOFF (CFSM)	1.05		1.13		1.09
ANNUAL RUNOFF (INCHES)	14.28		15.29		14.81
10 PERCENT EXCEEDS	27		28		27
50 PERCENT EXCEEDS	4.2		5.7		5.2
90 PERCENT EXCEEDS	1.6		1.6		.75