05580000 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 40°15'17", long 89°07'45" (NAD of 1927), on line between secs.19 and 20, T.21 N., R.1 E., De Witt County, Hydrologic Unit 07130009, on left upstream side of bridge on Waynesville Road, 0.5 mi downstream from Rock Creek, 0.7 mi north of Waynesville, and at mile 25.3.

DRAINAGE AREA.-- 227 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: January 1948 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-91.
BIOLOGICAL
	BENTHIC MACROINVERTEBRATES: Water year 1997.

REVISED RECORDS.-- WSP 1175: 1948-49.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 620.24 ft above NGVD of 1929 (U.S. Army Corps of Engineers bench mark). Prior to Sept. 8, 1970, nonrecording gage at same site and datum.

REMARKS.-- Diurnal fluctuation of low flows caused by City of Heyworth pumping station 10 mi. upstream at highway 136.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 24,600 ft³/s, Aug. 15, 1981, gage height, 16.91 ft; no flow Sept. 15, 28, 29, 1988.

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

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	16	17	160	142	e60	73	e800	129	1270	105	33	44
2	16	15	146	143	e59	78	632	150	685	100	29	34
3	24	13	149	139	e58	70	526	296	537	111	27	29
4	21	13	142	166	e56	85	441	220	446	150	28	26
5	24	21	140	293	e54	598	369	186	375	113	38	24

6	22	32	128	205	e53	625	342	153	330	106	25	22
7	13	23	116	235	e52	440	291	130	294	104	24	20
8	12	20	119	189	e51	337	258	114	273	92	23	19
9	12	16	118	164	e50	287	211	108	257	85	22	17
10	12	15	127	137	e49	232	180	101	414	439	22	16

11	13	16	134	135	e49	212	163	124	1600	555	19	15
12	12	17	109	133	e48	178	149	129	1090	326	17	15
13	13	15	103	116	e48	146	142	127	640	208	17	15
14	19	14	109	113	e48	144	131	289	495	437	16	14
15	31	14	106	115	e47	136	120	627	493	273	15	14

16	19	15	107	104	e47	140	114	448	477	189	17	88
17	13	16	96	116	e47	144	107	350	505	144	21	66
18	10	686	91	125	e46	136	98	335	410	116	21	37
19	10	1060	89	99	103	116	98	1200	333	101	21	26
20	10	711	75	e120	247	109	103	746	304	90	22	21

21	17	567	92	e100	222	100	125	541	272	79	23	22
22	15	453	88	e86	123	90	97	426	238	71	16	18
23	10	387	319	e76	104	89	85	351	199	65	14	16
24	8.2	468	406	e72	99	92	76	290	180	56	37	15
25	11	404	322	e70	90	99	164	2740	189	49	102	14

26	34	336	255	e78	85	707	152	1790	164	45	395	14
27	18	283	220	e74	79	1160	119	757	141	43	121	13
28	18	239	206	e70	67	819	109	573	131	39	68	13
29	19	208	198	e66	65	e1000	96	450	121	35	96	12
30	18	191	180	e64	---	e800	91	853	111	35	95	12

31	16	---	159	e62	---	e750	---	2870	---	38	59	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2004, BY WATER YEAR (WY)
MEAN	53.4	86.5	149	157	214	286	326	278	235	127	76.2	56.8
MAX	523	877	954	1020	731	1294	1020	976	1100	713	1540	1028
(WY)	1978	1986	1991	1993	1959	1979	1973	1995	1974	1993	1981	1993
MIN	0.31	2.07	0.79	3.69	3.76	19.1	47.7	32.1	9.69	2.40	1.33	0.70
(WY)	1964	1964	1964	1977	1963	2000	1956	1963	1963	1988	1963	1988

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1948 - 2004
ANNUAL TOTAL	47343.2		71164.2
ANNUAL MEAN	130		194		171
HIGHEST ANNUAL MEAN					518	1993
LOWEST ANNUAL MEAN					38.5	1954
HIGHEST DAILY MEAN	3780	Jul 10	2870	May 31	16100	Aug 15 1981
LOWEST DAILY MEAN	8.2	Oct 24	8.2	Oct 24	0.00	A
ANNUAL SEVEN-DAY MINIMUM	11	Jan 22	11	Oct 18	0.20	Oct 21 1963
MAXIMUM PEAK FLOW			3370	May 25	24600	Aug 15 1981
MAXIMUM PEAK STAGE			13.13	May 25	16.91	Aug 15 1981
INSTANTANEOUS LOW FLOW			7.6	Oct 24
ANNUAL RUNOFF (CFSM)	0.571		0.857		0.753
ANNUAL RUNOFF (INCHES)	7.76		11.66		10.23
10 PERCENT EXCEEDS	314		471		398
50 PERCENT EXCEEDS	60		103		62
90 PERCENT EXCEEDS	13		15		5.0

A - Sept. 15, 28, 29, 1988.