05539000 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°31'08", long 88°04'10" (NAD of 1927), in SW1/4NE1/4 sec.15, T.35 N., R.10 E., Will County, Hydrologic Unit 07120004, on right bank at Third Avenue in Joliet, 0.3 mi downstream from Spring Creek, and at mile 1.9.

DRAINAGE AREA.-- 107 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1944 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1979-91.

REVISED RECORDS.-- WDR IL-91-2: 1981(M).

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 526.00 ft above NGVD of 1929. Prior to Oct. 9, 1946, nonrecording gage at same site at datum 1.00 ft higher. Oct. 9, 1946, to Sept. 30, 1974, at datum 1.00 ft higher.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 17,300 ft³/s, June 13, 1981, gage height, 14.90 ft, from rating curve extended above 6,300 ft³/s; minimum, 0.5 ft³/s, Aug. 9, 16, 19, 1964.

REMARKS FOR CURRENT YEAR.-- Records good except those for Oct. 1 to May 16, which are fair, and those for Aug. 13 to Sept. 10 and estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	15	19	19	30	e15	e14	33	204	30	14	115	131
2	18	19	19	29	e16	e14	31	146	27	11	169	157
3	17	18	19	28	e18	e14	31	80	56	11	228	86
4	42	19	17	28	e20	e14	464	67	54	11	247	52
5	81	21	16	29	e19	e15	929	603	35	106	129	41

6	37	21	16	28	e18	e17	208	235	29	147	133	32
7	22	21	16	27	e17	e21	127	118	28	242	114	27
8	17	20	15	28	e16	e28	123	80	25	163	80	23
9	15	20	16	27	e15	e50	92	1680	24	207	63	20
10	14	22	15	27	e14	e40	69	654	22	177	53	18

11	13	21	14	27	e13	e35	50	616	21	98	57	17
12	13	21	14	e26	e13	42	51	273	20	56	109	17
13	13	20	13	e24	e13	58	43	171	18	37	80	18
14	14	22	13	e22	e14	61	37	111	19	26	65	45
15	14	24	12	e21	e14	52	31	112	16	333	54	49

16	14	25	11	e20	e14	46	28	83	15	285	46	28
17	14	23	11	e19	e13	50	30	61	14	182	44	19
18	14	22	34	e18	e14	48	27	50	18	580	40	16
19	14	23	91	e17	e15	50	25	47	75	218	32	15
20	14	21	60	e16	e18	68	27	145	40	112	29	14

21	15	22	41	e16	e22	65	28	111	24	304	27	13
22	15	23	35	e15	e19	53	26	68	17	250	e23	19
23	15	25	32	e15	e17	45	24	51	14	136	19	26
24	15	23	30	e14	e16	39	23	43	12	80	18	24
25	17	21	30	e14	e15	36	22	39	11	50	18	21

26	17	21	29	e13	e15	34	22	34	20	37	17	30
27	18	19	31	e13	e14	32	22	31	25	931	16	76
28	18	19	28	e13	e14	36	21	39	20	1420	15	43
29	20	19	27	e14	---	44	20	49	19	579	15	28
30	20	19	27	e14	---	44	49	45	17	282	37	21

31	18	---	30	e15	---	37	---	36	---	167	31	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2003, BY WATER YEAR (WY)
MEAN	39.9	61.6	77.6	82.2	110	166	174	132	104	60.1	35.5	39.7
MAX	458	359	552	306	416	726	566	488	581	432	144	372
(WY)	1955	1991	1983	1974	1997	1979	1947	1974	1981	1957	1998	1961
MIN	3.05	5.34	3.15	3.89	5.54	18.9	13.8	20.1	10.9	7.17	3.36	4.35
(WY)	1964	1964	1964	1963	1963	1964	1963	1985	1988	1988	1964	1966

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1945 - 2003
ANNUAL TOTAL	48063		24368
ANNUAL MEAN	132		66.8		90.0
HIGHEST ANNUAL MEAN					168	1993
LOWEST ANNUAL MEAN					20.8	1963
HIGHEST DAILY MEAN	3430	May 12	1680	May 9	8400	Jun 13 1981
LOWEST DAILY MEAN	10	Jul 23,24	11	A	0.80	Aug 16 1964
ANNUAL SEVEN-DAY MINIMUM	11	Jul 20	13	Dec 11	1.0	Aug 12 1964
MAXIMUM PEAK FLOW			2640	May 9	17300 B	Jun 13 1981
MAXIMUM PEAK STAGE			6.42	May 9	14.90	Jun 13 1981
INSTANTANEOUS LOW FLOW			9.7	Jul 4	0.50	C
ANNUAL RUNOFF (CFSM)	1.23		0.62		0.84
ANNUAL RUNOFF (INCHES)	16.71		8.47		11.43
10 PERCENT EXCEEDS	318		132		197
50 PERCENT EXCEEDS	26		25		30
90 PERCENT EXCEEDS	13		14		7.7

	A - Dec. 16, 17, June 25, July 2-4.
	B - From rating curve extended above 6,300 ft³/s.
	C - Aug. 9, 16, 19, 1964.