05537500 DATA: Discharge Tables, 2000

Station list Available data
ILLINOIS RIVER BASIN

05537500 LONG RUN NEAR LEMONT, IL

LOCATION.-- Lat 41°38'33", long 87°59'57", in SW1/4SE1/4 sec.32, T.37 N., R.11 E., Cook County, Hydrologic Unit 07120004, on left bank at downstream side of bridge on State Street, 2 mi south of Lemont, and at mile 5.4.

DRAINAGE AREA.-- 20.9 mi².

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

DISCHARGE: July 1951 to current year.

STAGE: Water years 1994-2000.

REVISED RECORDS.-- WSP 1338: 1952(M). WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 637.20 ft above sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 5,310 ft³/s, July 18, 1996, from rating curve extended above 2,800 ft³/s, gage height, 11.10 ft; no flow at times in most years.

REMARKS FOR CURRENT YEAR.-- Records good except those for Feb. 10-13 and 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	3.3	1.1	1.4	e3.2	e2.0	13	5.0	15	324	13	15	2.4
2	1.9	1.0	1.4	e3.5	e2.1	10	6.2	15	127	11	13	2.5
3	5.0	.90	2.0	3.8	e2.1	8.6	5.3	12	61	78	14	2.6
4	17	.86	23	5.1	e2.1	8.1	4.7	9.9	39	39	9.0	2.5
5	6.6	1.1	103	4.4	e2.1	7.2	3.9	8.8	91	23	22	2.3

6	3.0	1.5	61	3.6	e2.1	6.7	3.6	8.5	51	16	45	2.1
7	2.1	2.0	35	3.2	e2.2	6.0	4.1	8.0	30	12	62	2.3
8	1.7	2.0	20	3.3	e3.1	5.8	8.2	8.1	20	10	24	2.7
9	1.5	1.7	13	5.6	e5.0	5.7	7.4	62	15	8.9	14	2.7
10	1.5	1.3	10	12	9.1	5.4	5.8	87	11	205	8.8	4.4

11	1.5	1.5	7.6	12	11	5.1	7.0	55	14	105	7.0	13
12	1.7	1.5	6.8	8.4	13	4.8	6.1	52	214	46	5.8	70
13	1.7	1.4	6.0	6.3	14	4.8	5.1	72	190	29	5.0	20
14	1.7	1.5	5.3	5.5	9.0	4.7	5.0	35	171	20	4.6	16
15	1.7	1.7	6.2	5.0	6.0	4.4	4.6	23	153	15	4.1	11

16	1.7	1.9	9.8	e4.2	5.7	5.6	11	20	67	11	3.7	6.5
17	2.0	1.9	7.6	e3.7	6.1	4.5	114	17	40	9.5	21	5.2
18	2.1	1.1	6.4	e3.3	6.2	4.0	46	48	27	7.9	16	4.7
19	2.0	.29	5.7	e3.0	6.3	5.6	78	142	19	7.1	8.6	4.2
20	1.1	.29	e4.9	e2.8	6.4	15	344	56	21	6.2	6.2	4.1

21	.42	.30	e4.3	e2.6	6.7	13	305	36	59	5.5	5.2	6.3
22	.74	.30	e3.6	e2.4	34	8.5	150	28	30	5.3	4.4	5.3
23	.60	2.0	e3.2	e2.2	45	7.5	89	28	18	5.1	3.9	13
24	.82	5.4	e2.6	e2.0	65	7.0	61	18	37	5.0	5.2	15
25	.95	2.7	e2.3	e1.9	57	6.8	40	12	179	4.6	4.7	11

26	.85	2.0	e2.1	e1.9	32	6.4	29	9.8	65	4.0	3.6	6.8
27	.87	1.7	e2.3	e1.9	24	6.9	23	23	34	4.7	3.1	5.0
28	.68	1.5	e2.4	e1.9	18	6.6	18	186	22	7.8	2.8	4.1
29	.37	1.5	e2.6	e2.0	15	6.0	22	65	20	5.7	2.8	3.8
30	1.0	1.2	e2.8	e2.0	---	5.4	16	39	16	14	2.8	4.0

31	1.2	---	e3.0	e2.0	---	5.0	---	188	---	19	2.5	---

TOTAL	69.30	45.14	367.3	124.7	412.3	214.1	1428.0	1387.1	2165	753.3	349.8	255.5
MEAN	2.24	1.50	11.8	4.02	14.2	6.91	47.6	44.7	72.2	24.3	11.3	8.52
MAX	17	5.4	103	12	65	15	344	188	324	205	62	70
MIN	.37	.29	1.4	1.9	2.0	4.0	3.6	8.0	11	4.0	2.5	2.1
CFSM	.11	.07	.57	.19	.68	.33	2.28	2.14	3.45	1.16	.54	.41
IN.	.12	.08	.65	.22	.73	.38	2.54	2.47	3.85	1.34	.62	.45

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2000, BY WATER YEAR (WY)
MEAN	9.67	14.0	16.8	16.9	21.1	34.6	36.8	23.5	18.9	11.5	5.48	7.77
MAX	163	71.9	92.2	75.5	104	131	86.9	74.5	89.6	126	27.4	74.9
(WY)	1955	1986	1983	1993	1997	1979	1975	1966	1993	1996	1972	1961
MIN	.000	.006	.016	.020	.028	2.19	1.69	2.83	.73	.048	.000	.000
(WY)	1965	1972	1964	1977	1964	1964	1963	1958	1988	1961	1964	1963

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1951 - 2000
ANNUAL TOTAL	8776.64		7571.54
ANNUAL MEAN	24.0		20.7		18.0
HIGHEST ANNUAL MEAN					39.9	1993
LOWEST ANNUAL MEAN					3.37	1963
HIGHEST DAILY MEAN	496	Jan 23	344	Apr 20	2190	Jul 18 1996
LOWEST DAILY MEAN	.29	Nov 19, 20	.29	Nov 19, 20	.00	A
ANNUAL SEVEN-DAY MINIMUM	.73	Oct 23	.73	Oct 23	.00	Aug 27 1953
INSTANTANEOUS PEAK FLOW			568	May 31	5310 B	Jul 18 1996
INSTANTANEOUS PEAK STAGE			6.20	May 31	11.10	Jul 18 1996
INSTANTANEOUS LOW FLOW			.29 C	Nov 18-22
ANNUAL RUNOFF (CFSM)	1.15		.99		.86
ANNUAL RUNOFF (INCHES)	15.62		13.48		11.72
10 PERCENT EXCEEDS	54		55		42
50 PERCENT EXCEEDS	7.1		6.0		5.1
90 PERCENT EXCEEDS	1.5		1.6		.10

A - At times in most years.
B - From rating curve extended above 2,800 ft³/s.
C - Minimum recorded, but may have been less during Nov. 18-22.