05558300 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN

05558300 ILLINOIS RIVER AT HENRY, IL


LOCATION.-- Lat 41°06'26", long 89°21'23" (NAD of 1927), in SW1/4 sec.15, T.13 N., R.10 E., Marshall County, Hydrologic Unit 07130001, on right bank 600 ft upstream from bridge on State Highway 18, 4.4 mi upstream from Crow Creek, 38.2 mi upstream from Peoria Lock and Dam, and at mile 196.0.

DRAINAGE AREA.-- 13,543 mi², does not include diversion from Lake Michigan through the Chicago Sanitary and Ship Canal, which has occurred since Jan. 17, 1900.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1981 to current year. Prior to October 1983, published as station number "05558900."
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	SEDIMENT: June 1983 to September 1986, May 1993 to September 1993.
	MISCELLANEOUS: Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996.

GAGE.-- Water-stage recorder, phone telemeter, and acoustical-velocity meter. Datum of gage is 425.88 ft above NGVD of 1929.

REMARKS.-- Some regulation by locks and dams upstream from station at Starved Rock and downstream at Peoria.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum recorded discharge, 117,000 ft³/s, based on stage-area and velocity ratings, Feb. 23, 1997, gage height, 27.19 ft; maximum gage height, 32.02 ft, Mar. 7, 1985; minimum daily discharge, 2,240 ft³/s, Nov. 3, 2002.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 324 mg/L, June 11, 1993; minimum daily mean, 19 mg/L, May 2, 1993.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 52,800 tons, June 11, 1993; minimum daily, 1,600 tons, June 2, 1993.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of Mar. 22, 1979, reached a stage of 32.67 ft, from information by the U.S. Army Corps of Engineers, discharge, about 140,000 ft³/s, based on rating curve extended above 32.20 ft.

REMARKS FOR CURRENT YEAR.-- Records fair except those for Aug. 24 - Sept. 4 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	4710	2730	2550	3370	e3300	4160	5930	12600	11000	5380	16600	6380
2	4720	2880	4630	4260	4220	4060	5460	17200	11500	5290	16600	7910
3	3960	2240	3240	3910	2880	4080	6290	16100	11700	4460	16700	7140
4	4840	2400	2760	5080	3280	4070	8540	15300	10600	5730	17600	7680
5	7470	3290	2930	5090	3850	3520	11500	19800	9930	5950	16600	7650

6	6640	3150	e3200	4690	3580	4110	13300	22700	10500	6980	15400	7580
7	6090	e2700	e3100	e2800	3600	3800	12700	23800	9490	10300	14900	6260
8	5310	2500	3570	3990	4240	5930	14100	21800	8750	12600	12600	6980
9	5830	2530	3530	4720	3510	3720	13600	e25000	9640	17200	11400	5850
10	5030	4200	2930	3330	4310	5560	13800	28800	8720	21900	10100	5660

11	4520	3210	3310	3050	3650	5000	12800	32700	9630	26800	9690	5540
12	4250	2940	2830	e2400	3390	5090	11500	36600	8820	29400	9690	4260
13	3880	2850	3220	4460	4270	5710	10200	33900	8210	27800	8670	e5100
14	4520	3580	2600	2760	3140	6390	8570	31000	8180	26600	8300	e6100
15	3760	3650	2950	3010	3660	7160	7030	28800	10600	28200	7440	e5200

16	3300	3330	3570	2340	3390	6440	9640	27000	12200	30300	7050	5030
17	3620	3390	3170	2440	3060	6070	8510	26200	12200	29400	7540	e4300
18	e4400	3770	e7000	3340	3180	5900	7680	24000	10900	30400	6740	e4500
19	3930	2880	7900	e2500	3500	5710	6460	21300	13500	32500	5790	4700
20	3650	4160	5870	e2800	2980	7610	6690	22800	9370	36100	5580	5360

21	e4300	4540	6170	e3300	2800	7420	7510	19600	9920	34800	6010	4700
22	3640	3630	5050	e2700	4330	7790	6820	17900	8050	32100	7030	e4200
23	2720	e3000	5470	e2300	2730	6850	5970	16000	7490	31800	4780	e4900
24	2810	4830	5070	e2800	3900	6340	6700	14900	6430	29300	5670	4640
25	2510	2520	4060	e3800	4440	7820	6240	14000	6250	26400	5250	3900

26	4210	2340	4430	e2800	4060	6780	5700	12700	7160	23500	6010	5240
27	3830	3260	3100	e3200	4350	7420	5230	12100	4890	22200	5190	6060
28	2680	2440	3800	e2800	4460	7880	6400	11100	6570	e25000	4630	5500
29	3000	3660	4240	e3000	---	7600	5100	10600	6970	22800	6300	4770
30	2340	3310	4020	e3300	---	6940	5140	8230	5200	19800	4160	5810

31	2710	---	5000	e2700	---	6090	---	12400	---	17700	5350	---

TOTAL	129180	95910	125270	103040	102060	183020	255110	636930	274370	678690	285370	168900
MEAN	4167	3197	4041	3324	3645	5904	8504	20550	9146	21890	9205	5630
MAX	7470	4830	7900	5090	4460	7880	14100	36600	13500	36100	17600	7910
MIN	2340	2240	2550	2300	2730	3520	5100	8230	4890	4460	4160	3900

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1982 - 2003, BY WATER YEAR (WY)
MEAN	9348	12330	14380	13010	17420	22950	22350	19550	17240	13200	9409	8862
MAX	23990	31730	51370	36120	38680	55690	48890	36220	33600	28840	18640	26090
(WY)	1994	1986	1983	1993	2001	1982	1983	2002	1996	1993	1993	1993
MIN	4167	3197	4041	3324	3645	5904	8504	8544	7199	5669	3739	2687
(WY)	2003	2003	2003	2003	2003	2003	2003	1989	1988	1991	1991	1991

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1982 - 2003
ANNUAL TOTAL	4892920		3037850
ANNUAL MEAN	13410		8323		14980
HIGHEST ANNUAL MEAN					24470	1993
LOWEST ANNUAL MEAN					8323	2003
HIGHEST DAILY MEAN	85100	May 14	36600	May 12	111000	Feb 23 1997
LOWEST DAILY MEAN	2240	Nov 3	2240	Nov 3	2040	Sep 27 1991
ANNUAL SEVEN-DAY MINIMUM	2610	Oct 29	2610	Oct 29	2140	Sep 24 1991
MAXIMUM PEAK FLOW			38400 A	May 12	117000 B	Feb 23 1997
MAXIMUM PEAK STAGE			20.46 C	Jul 21	32.02	Mar 7 1985
10 PERCENT EXCEEDS	27200		19800		29400
50 PERCENT EXCEEDS	7470		5470		11100
90 PERCENT EXCEEDS	3220		2880		5390

	A - Gage height, 19.53 ft.
	B - Based on stage-area and velocity ratings; gage height, 27.19 ft.
	C - Discharge, 34,600 ft³/s.