05533400 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05533400 SAWMILL CREEK NEAR LEMONT, IL

LOCATION.-- Lat 41°42'28", long 87°57'47", in NE1/4SW1/4 sec.10, T.37 N., R.11 E., Du Page County, Hydrologic Unit 07120004, on concrete abutment on right bank, 50 ft up stream from bridge on Bluff Road at south edge of Argonne National Laboratory, 2.5 mi northeast of Lemont, and at mile 1.

DRAINAGE AREA.-- 13.0 mi²

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

DISCHARGE: December 1985 to current year.

STAGE: Water years 1994-2001.

PARTIAL RECORD: Annual maximum, water years 1961-79.

PRECIPITATION: April 1986 to current year.
SURFACE-WATER QUALITY

MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.

BIOLOGICAL

BENTHIC MACROINVERTEBRATES: Water year 2000.

FISH: Water year 2001.

HABITAT: Water year 2000.

REVISED RECORDS.-- WDR IL-77-1: 1961-76(M).

GAGE.-- Water-stage recorder, phone telemeter, rain gage, and crest-stage gage. Datum of gage is 630.00 ft above sea level. Oct. 11, 1961, to Sept. 30, 1976, crest-stage gage on bridge 50 ft downstream at datum 11.22 ft higher.

REMARKS.-- For precipitation records, snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,070 ft³/s, July 18,1996, gage height, 17.53 ft; no flow at times in most years.
PRECIPITATION: Maximum daily total, 6.17 in., July 17, 1996.

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	2.6	1.6	e3.4	e2.2	e20	11	4.8	4.2	27	.07	1.8	20
2	2.3	2.8	e3.1	e2.2	e12	10	4.6	3.2	7.5	.07	87	5.2
3	4.7	2.4	e2.8	e2.3	e9.0	9.1	4.4	2.9	5.2	3.6	27	3.1
4	45	2.1	e2.6	e2.4	e7.0	8.0	4.0	2.5	4.3	2.4	8.8	1.7
5	13	1.9	e2.4	e2.4	e6.5	6.7	5.6	2.3	37	.60	4.3	1.3

6	8.6	7.4	e2.3	e2.4	e6.7	6.0	16	5.4	22	.13	3.3	7.6
7	4.6	41	e2.2	e2.3	e8.0	5.8	8.5	6.4	9.1	1.4	2.6	22
8	5.0	8.8	e2.5	e2.3	54	5.7	5.5	3.7	6.1	.56	2.0	5.2
9	3.4	61	e2.4	e2.2	265	5.5	9.4	3.1	4.7	.17	3.3	16
10	2.9	34	e2.3	e2.2	74	5.4	6.4	4.2	3.9	.13	12	7.0

11	2.6	13	e2.7	e2.2	40	6.3	15	26	3.4	.13	2.6	3.4
12	2.4	8.2	e3.5	e2.3	23	12	25	6.4	9.8	.12	2.1	4.1
13	2.3	20	e3.2	e2.5	18	12	9.0	3.9	4.3	.10	2.3	3.8
14	2.3	10	e3.0	e10	34	7.6	6.8	4.6	3.2	.08	1.4	3.3
15	2.0	7.3	e2.8	38	28	25	48	3.9	2.5	.05	.93	2.2

16	2.4	5.7	e2.6	25	18	46	22	4.0	2.5	.03	17	2.1
17	2.3	4.9	e2.5	15	12	41	12	3.5	2.1	.03	4.2	1.7
18	2.0	e4.0	e2.4	11	9.2	31	8.0	3.0	2.4	.04	5.7	1.8
19	3.3	e3.3	e2.3	8.5	7.7	20	6.5	2.4	2.0	.04	4.5	69
20	2.1	e2.8	e2.2	7.0	7.6	15	24	2.0	1.4	.03	2.6	16

21	1.8	e2.4	e2.1	e6.0	6.6	12	45	3.9	3.3	22	1.9	31
22	1.8	e2.3	e2.1	e5.3	6.3	9.4	29	3.2	2.8	20	1.9	9.7
23	1.8	e2.2	e2.0	e4.9	6.0	7.7	20	3.4	1.7	14	1.7	37
24	2.4	e2.1	e2.0	e4.5	103	7.0	13	3.1	1.0	7.6	8.5	28
25	2.1	e2.0	e2.0	e4.2	99	6.3	10	5.8	.35	104	43	9.5

26	1.9	e4.3	e1.9	e3.9	39	5.8	7.0	36	.20	25	15	4.9
27	2.4	e4.0	e1.9	e3.6	21	5.4	5.8	39	.16	8.1	13	2.8
28	2.0	e3.7	e1.9	e3.9	14	5.1	4.8	13	.10	4.4	20	2.1
29	1.8	e4.2	e2.0	e4.3	---	6.3	4.2	6.0	.08	3.6	8.2	1.7
30	1.9	e3.8	e2.0	e60	---	5.7	3.8	4.3	.07	2.6	3.3	1.4

31	1.8	---	e2.1	e30	---	5.1	---	7.8	---	2.2	42	---

TOTAL	137.5	273.2	75.2	275.0	954.6	364.9	388.1	223.1	170.16	223.28	353.93	324.6
MEAN	4.44	9.11	2.43	8.87	34.1	11.8	12.9	7.20	5.67	7.20	11.4	10.8
MAX	45	61	3.5	60	265	46	48	39	37	104	87	69
MIN	1.8	1.6	1.9	2.2	6.0	5.1	3.8	2.0	.07	.03	.93	1.3
CFSM	.34	.70	.19	.68	2.62	.91	1.00	.55	.44	.55	.88	.83
IN.	.39	.78	.22	.79	2.73	1.04	1.11	.64	.49	.64	1.01	.93

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1986 - 2001, BY WATER YEAR (WY)
MEAN	6.09	12.2	9.16	11.7	14.4	14.5	17.6	15.6	12.7	10.7	8.84	7.42
MAX	17.8	37.4	28.7	30.6	54.5	27.7	53.4	49.3	57.6	58.6	28.2	20.6
(WY)	1992	1991	1988	1993	1997	1990	1999	1990	1993	1996	1998	1989
MIN	1.11	.86	1.03	2.37	2.08	3.54	5.30	1.25	1.02	.14	.50	.095
(WY)	1993	2000	1996	2000	1993	2000	1989	1992	1992	1991	1991	1995

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1986 - 2001
ANNUAL TOTAL	4207.76		3763.57
ANNUAL MEAN	11.5		10.3		11.6
HIGHEST ANNUAL MEAN					17.9	1993
LOWEST ANNUAL MEAN					7.58	1994
HIGHEST DAILY MEAN	231	Apr 20	265	Feb 9	1220	Jul 18 1996
LOWEST DAILY MEAN	.00	Sep 5,6,9	.03	Jul 16,17,20	.00	A
ANNUAL SEVEN-DAY MINIMUM	.04	Sep 3	.04	Jul 14	.00	Jul 24 1991
MAXIMUM PEAK FLOW			479	Feb 9	3070	Jul 18 1996
MAXIMUM PEAK STAGE			12.26	Feb 9	17.53	Jul 18 1996
INSTANTANEOUS LOW FLOW			.01	Jul 16,21
ANNUAL RUNOFF (CFSM)	.88		.79		.89
ANNUAL RUNOFF (INCHES)	12.04		10.77		12.08
10 PERCENT EXCEEDS	27		25		25
50 PERCENT EXCEEDS	3.5		4.2		4.0
90 PERCENT EXCEEDS	.99		1.8		.42

A - At most times in most years.