05578500 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 40°06'54", long 89°02'57" (NAD of 1927), in NE1/4SE1/4 sec.11, T.19 N., R.1 E., De Witt County, Hydrologic Unit 07130009, on right bank at downstream side of bridge on County Road 490 E, 0.5 mi upstream from State Highway 54, 0.8 mi upstream from a railroad bridge and Ten Mile Creek, 3.2 mi northwest of Rowell, and at mile 65.3.

DRAINAGE AREA.-- 335 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1942 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-91.

REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-04: 2003

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 610.00 ft above NGVD of 1929 (U.S. Army Corps of Engineers bench mark).

REMARKS.-- Flow partially regulated due to storage at Clinton Reservoir, 11 mi upstream from gage since Oct. 12, 1977.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 24,500 ft³/s, May 16, 1968, gage height, 29.21 ft; maximum discharge after Clinton Reservoir, 7,810 ft³/s, Apr. 13, 1994, gage height 24.04 ft; minimum daily discharge, 0.7 ft³/s, Oct. 4, 1954.

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	14	12	491	318	e115	130	1120	144	1190	187	59	241
2	14	12	432	298	e112	113	1240	145	1620	176	54	206
3	13	12	404	289	e110	122	1130	147	1520	174	47	177
4	13	13	364	374	e108	142	948	128	1110	167	48	153
5	12	17	338	453	e106	314	819	123	763	157	49	138

6	11	16	323	422	e104	395	722	121	592	150	36	114
7	11	13	300	417	e102	429	653	114	491	153	25	90
8	10	12	288	414	e100	423	603	122	420	135	20	76
9	9.9	12	276	406	e99	429	560	94	367	136	20	58
10	10	12	281	364	e98	377	497	87	357	305	50	43

11	10	13	256	325	e97	323	438	103	694	308	24	35
12	11	13	249	299	e96	284	400	101	776	358	19	29
13	11	12	246	284	e95	271	338	98	904	279	17	27
14	19	12	238	262	e94	241	282	151	883	297	15	22
15	12	12	217	245	e93	224	253	234	900	332	15	19

16	9.3	13	208	236	e92	240	227	282	1050	323	14	17
17	8.8	13	184	228	e91	214	215	294	824	300	13	17
18	8.9	666	193	231	e91	197	196	365	746	268	13	19
19	9.1	886	183	222	e115	181	157	730	648	237	12	14
20	9.8	813	174	e230	e160	171	190	682	529	211	16	14

21	10	856	164	e165	176	154	195	675	445	191	16	12
22	11	836	156	e145	179	144	202	634	397	172	13	11
23	11	772	259	e140	179	131	207	597	351	165	12	11
24	11	782	323	e135	168	122	188	558	309	147	28	11
25	11	771	365	e135	157	120	199	1440	316	127	69	11

26	13	749	376	e155	152	429	177	1370	288	100	278	11
27	12	703	374	e140	144	716	167	1330	256	80	168	11
28	12	644	356	e135	135	782	149	1220	235	66	150	11
29	12	590	353	e130	132	853	120	919	217	59	364	11
30	12	537	339	e125	---	864	132	734	200	62	341	11

31	12	---	322	e120	---	908	---	1100	---	67	284	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1978 - 2004, BY WATER YEAR (WY)
MEAN	105	160	229	207	321	528	478	516	353	224	132	57.7
MAX	1069	1236	1268	1316	975	2129	1704	1648	850	1370	1576	658
(WY)	1994	1986	1983	1993	1982	1982	1979	1995	1999	1981	1981	1993
MIN	8.31	9.77	12.1	11.0	14.9	22.3	54.8	45.2	13.7	8.51	6.57	5.46
(WY)	1989	1989	1996	1980	1989	2000	2000	1988	1988	1988	1988	1988

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1978 - 2004
ANNUAL TOTAL	54556.8		97756.8
ANNUAL MEAN	149		267		276
HIGHEST ANNUAL MEAN					601	1993
LOWEST ANNUAL MEAN					56.3	2000
HIGHEST DAILY MEAN	886	Nov 19	1620	Jun 2	6960	Apr 13 1994
LOWEST DAILY MEAN	8.8	Oct 17	8.8	Oct 17	3.7	Sep 8 1988
ANNUAL SEVEN-DAY MINIMUM	9.6	Oct 16	9.6	Oct 16	4.1	Sep 4 1988
MAXIMUM PEAK FLOW			1960	May 25	7810	Apr 13 1994
MAXIMUM PEAK STAGE			19.05	May 25	24.04	Apr 13 1994
INSTANTANEOUS LOW FLOW			8.7	Oct 17,18
10 PERCENT EXCEEDS	373		731		701
50 PERCENT EXCEEDS	70		168		110
90 PERCENT EXCEEDS	12		12		11