05533400 DATA: Discharge Tables, 2000

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 upstream 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 1994-2000.

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

PRECIPITATION: April 1986 to current year.

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, 6.17 in., July 17, 1996 but may have been greater during periods of missing record.

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

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	2.8	.39	.41	e1.7	e.68	4.8	2.1	9.5	65	4.1	10	.16
2	2.1	.34	.39	e1.9	e.70	4.0	2.1	6.3	32	3.4	8.0	.11
3	19	.41	2.0	2.4	e.72	3.7	2.3	4.4	16	82	3.7	.05
4	16	.50	11	4.7	e.73	3.5	2.0	4.1	12	24	2.3	.02
5	3.6	.33	99	3.1	e.73	3.4	1.8	3.5	22	11	8.6	.00

6	2.1	.31	26	2.5	e.73	3.4	1.8	3.1	11	7.2	25	.00
7	1.3	.38	7.2	2.1	e.74	3.2	4.1	2.9	6.9	5.0	23	.19
8	1.3	.47	4.6	2.0	e1.0	3.0	10	8.8	4.9	3.8	6.1	.03
9	1.1	.25	3.9	6.3	3.0	2.5	4.7	173	3.8	3.6	3.8	.00
10	.84	.07	3.7	11	6.8	2.1	3.4	72	3.6	134	3.1	26

11	.66	.06	3.1	5.9	6.6	2.1	5.4	42	25	47	2.7	48
12	.65	.12	2.7	3.8	4.5	1.9	3.6	29	114	21	2.0	115
13	.52	.49	2.5	3.2	3.8	1.9	3.0	20	84	10	1.4	25
14	.63	.26	2.4	2.7	3.4	1.9	2.7	10	52	7.1	2.0	25
15	.60	.21	3.1	e2.4	3.2	2.2	2.7	6.8	36	5.5	1.4	10

16	1.2	.09	3.8	e2.2	3.4	3.3	9.6	8.1	18	4.4	.90	5.7
17	.92	.06	3.7	e2.0	3.5	2.3	40	6.2	11	3.3	45	4.2
18	.58	.25	2.9	e1.8	3.6	2.0	9.2	24	6.9	2.8	11	3.2
19	.54	.38	2.7	e1.6	5.2	3.7	37	34	5.4	2.7	4.4	2.8
20	.44	.26	e2.3	e1.4	4.6	12	231	15	13	2.1	3.0	8.0

21	.44	.03	e1.9	e1.2	8.9	6.3	144	9.9	14	1.9	2.1	5.8
22	.34	.00	e1.7	e1.0	35	4.0	55	16	6.0	1.8	1.9	12
23	.54	11	e1.5	e.90	30	3.3	36	8.9	4.4	1.2	9.3	18
24	.57	5.2	e1.3	e.80	55	4.6	24	6.1	41	.39	3.0	21
25	.42	1.1	e1.1	e.72	27	3.8	13	4.9	58	.17	2.0	8.6

26	.36	.70	e1.0	e.68	14	3.0	8.8	4.0	20	.11	1.7	5.6
27	.14	.62	e1.1	e.64	11	6.5	6.7	16	9.5	.08	1.4	4.1
28	.59	.57	e1.2	e.66	6.5	3.6	5.6	216	7.4	.04	.81	3.3
29	.52	.52	e1.3	e.70	5.3	2.9	5.0	48	7.3	.98	.49	3.2
30	.60	.53	e1.4	e.70	---	2.5	4.4	21	4.4	27	.31	3.1

31	.42	---	e1.5	e.69	---	2.2	---	78	---	15	.30	---

TOTAL	61.82	25.90	202.40	73.39	250.33	109.6	681.0	911.5	714.5	432.67	190.71	358.16
MEAN	1.99	.86	6.53	2.37	8.63	3.54	22.7	29.4	23.8	14.0	6.15	11.9
MAX	19	11	99	11	55	12	231	216	114	134	45	115
MIN	.14	.00	.39	.64	.68	1.9	1.8	2.9	3.6	.04	.30	.00
CFSM	.15	.07	.50	.18	.66	.27	1.75	2.26	1.83	1.07	.47	.92
IN.	.18	.07	.58	.21	.72	.31	1.95	2.61	2.04	1.24	.55	1.02

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1986 - 2000, BY WATER YEAR (WY)
MEAN	6.21	12.4	9.64	11.9	13.1	14.7	17.9	16.1	13.2	11.0	8.67	7.19
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 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1986 - 2000
ANNUAL TOTAL	4978.10		4011.98
ANNUAL MEAN	13.6		11.0		11.6
HIGHEST ANNUAL MEAN					17.9	1993
LOWEST ANNUAL MEAN					7.58	1994
HIGHEST DAILY MEAN	226	Apr 9	231	Apr 20	1220	Jul 18 1996
LOWEST DAILY MEAN	.00	Nov 22	.00	A	.00	B
ANNUAL SEVEN-DAY MINIMUM	.14	Sep 5	.04	Sep 3	.00	Jul 24 1991
INSTANTANEOUS PEAK FLOW			655	May 28	3070	Jul 18 1996
INSTANTANEOUS PEAK STAGE			12.87	May 28	17.53	Jul 18 1996
ANNUAL RUNOFF (CFSM)	1.05		.84		.90
ANNUAL RUNOFF (INCHES)	14.25		11.48		12.17
10 PERCENT EXCEEDS	32		25		25
50 PERCENT EXCEEDS	3.7		3.2		4.0
90 PERCENT EXCEEDS	.26		.39		.41

A - Nov. 22, Sept. 5, 6, 9.
B - At times in most years.