05584500 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 40°19'49", long 90°53'46" (NAD of 1927), in SE1/4SW1/4 sec.18, T.4 N., R.4 W., McDonough County, Hydrologic Unit 07130010, on right bank at downstream side of bridge on State Highway 61, 0.2 mi downstream from a railroad bridge, 1 mi southwest of Colmar, 1.8 mi upstream from Troublesome Creek, and at mile 61.8.

DRAINAGE AREA.-- 655 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 1975-91 and 1998.
	MISCELLANEOUS: Contaminants in streambed sediments, July 1997; contaminants in fish tissue, July 1997; streambank sediment size, October 1997; streambed sediment size, October 1997.
BIOLOGICAL
	BENTHIC MACROINVERTEBRATES: Water years 1996-1998.
	FISH: Water year 1997 and 1998.
	HABITAT: Water years 1996-1998.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and crest-stage gage. Datum of gage is 491.53 ft above NGVD of 1929. Prior to July 13, 1945, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 38,900 ft³/s, Mar. 5, 1985, gage height, 26.61 ft; maximum gage height, 27.03 ft, Jan. 3, 1965, ice jam; no flow part of each day Dec. 8, 9, 12, 13, 17, 21, 1955, due to temporary dam upstream; no flow Oct. 19, 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	25	32	142	424	e138	204	381	195	1330	127	34	111
2	20	36	131	396	e137	209	344	226	953	146	32	82
3	17	157	113	392	e136	194	310	228	605	195	31	66
4	15	324	109	362	e135	238	286	219	464	248	33	55
5	13	996	115	328	e134	1610	263	196	393	190	42	47

6	12	723	124	201	e132	1490	246	186	352	141	38	41
7	13	370	122	242	e131	878	240	168	316	172	37	35
8	13	245	113	312	e130	602	234	152	282	170	29	32
9	12	187	117	280	e128	477	223	137	253	127	23	29
10	12	153	3580	275	e125	412	203	132	969	377	20	26

11	10	137	6010	250	e124	355	190	129	1790	704	18	24
12	12	130	8250	258	e122	326	182	126	1080	540	26	23
13	14	118	4080	259	e120	286	175	131	662	271	21	23
14	51	100	1410	231	e120	291	170	143	479	191	16	21
15	142	85	848	222	e119	290	166	158	1150	145	15	375

16	90	82	929	242	e119	270	161	146	659	119	14	3300
17	70	91	970	240	e119	285	159	126	355	115	13	1920
18	52	1630	714	216	e120	296	153	117	294	120	12	549
19	40	1770	608	191	e170	277	144	118	254	100	13	301
20	32	806	493	e205	e400	248	144	119	225	81	17	216

21	27	499	444	e200	e850	235	209	113	220	72	31	169
22	25	367	507	e180	659	213	277	110	302	66	31	140
23	20	304	991	e170	432	199	221	112	257	65	33	121
24	19	289	820	e168	362	207	179	178	196	62	26	107
25	39	252	566	e162	305	216	202	3410	168	58	51	96

26	60	216	480	e160	236	266	218	2150	153	52	105	87
27	59	196	439	e153	227	401	190	741	138	48	2060	79
28	53	176	561	e152	214	393	163	451	129	45	2780	74
29	47	155	754	e150	202	598	154	337	123	40	845	69
30	42	145	584	e148	---	506	157	374	116	38	281	65

31	39	---	484	e145	---	418	---	1370	---	36	163	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2004, BY WATER YEAR (WY)
MEAN	254	260	276	337	537	704	808	779	704	451	168	254
MAX	3502	2693	2686	2077	2384	3734	3193	4471	3081	4194	899	4024
(WY)	1987	1986	1983	1974	2001	1985	1973	1995	1974	1993	1993	1961
MIN	0.67	2.61	2.54	3.33	5.70	30.5	22.9	20.8	21.1	3.89	2.82	1.75
(WY)	1989	1990	1990	1956	1989	1956	1956	1956	1988	1988	1988	1988

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1945 - 2004
ANNUAL TOTAL	91389.8		127567
ANNUAL MEAN	250		349		460
HIGHEST ANNUAL MEAN					1347	1993
LOWEST ANNUAL MEAN					23.1	1989
HIGHEST DAILY MEAN	8250	Dec 12	8250	Dec 12	35600	Mar 5 1985
LOWEST DAILY MEAN	7.3	Aug 28	10	Oct 11	0.00	Oct 19 1988
ANNUAL SEVEN-DAY MINIMUM	7.7	Aug 23	12	Oct 6	0.12	Oct 16 1988
MAXIMUM PEAK FLOW			8830	Dec 12	38900 A	Mar 5 1985
MAXIMUM PEAK STAGE			22.32	Dec 12	27.03 B	Jan 3 1965
INSTANTANEOUS LOW FLOW			9.0	Oct 11
ANNUAL RUNOFF (CFSM)	0.382		0.532		0.702
ANNUAL RUNOFF (INCHES)	5.19		7.25		9.54
10 PERCENT EXCEEDS	529		707		1000
50 PERCENT EXCEEDS	95		170		127
90 PERCENT EXCEEDS	16		29		10

	A - Gage height, 26.61 ft.
	B - Ice jam.