05558300 DATA: Discharge Tables, 2004

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, acoustic-velocity meter, and a crest-stage gage. 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 a stage-area and velocity rating, 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 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	5270	5090	14600	11800	e5300	7810	29300	11000	45700	11200	e5000	23400
2	4470	6120	12700	12600	e4800	10900	28500	11400	48500	8960	6630	21800
3	e5200	9220	11200	12500	e5200	10300	27100	11500	43700	7290	5150	20100
4	4880	8900	8290	12400	e3200	11400	24000	8840	38900	11400	10400	17500
5	4020	13900	8810	10700	e5400	15700	20700	9310	34700	9330	10100	14800

6	3490	15800	8690	10500	e5600	28000	19200	8550	31600	10100	9960	13800
7	3380	14800	9530	10900	e5200	32700	18000	9160	28300	10200	7540	13400
8	3550	12300	11100	10700	e5700	31100	16900	7970	26300	8700	8220	11100
9	4080	11100	11000	10400	e6200	28800	14800	8390	24100	7160	7840	8580
10	e3600	9850	14400	9060	e4800	23600	13900	8760	22000	9360	6480	8080

11	e3000	9500	18300	8800	e4500	25100	12900	9030	24100	7570	7050	8180
12	4930	8250	22000	10200	e5000	22000	12300	8770	28200	e9000	6180	7030
13	2830	7980	20600	9240	e5400	18500	11900	11700	40100	e11000	5500	6470
14	4380	5480	18900	8670	e5000	18900	9180	17200	49800	e10000	5290	7000
15	6510	7570	16300	7850	e4800	18700	7570	22300	49400	e9000	5860	5970

16	5720	6410	16400	8510	e4500	16800	8000	24200	45000	e8000	4760	9270
17	5980	5710	15700	8290	e4100	14400	6800	23600	42400	e7400	5020	7190
18	4700	10700	14200	7870	4960	14400	6430	24100	37400	e8000	5470	6850
19	5760	19600	13600	6350	5900	13100	8850	21400	34200	e6500	5990	5520
20	e5000	25100	e11500	5660	6210	14500	7290	20900	29600	e7200	7520	5340

21	5480	27400	9400	5570	8910	12900	10600	21300	28000	e9000	6290	5550
22	5140	23200	10000	6240	9940	10300	10300	20900	27700	e8500	6440	4950
23	3680	20700	9290	5830	12000	9630	10400	23500	24500	e7800	6380	5170
24	4230	20800	9000	5830	12600	9330	10200	25800	25700	e7000	6550	5390
25	5460	21000	8980	5000	12100	9560	9620	25100	19500	e6500	8360	4450

26	4690	21800	10200	5570	11400	12300	12500	24100	14700	e6000	9990	4310
27	4880	20400	9620	4150	11000	13300	12500	23600	11900	e5400	14200	5040
28	e5000	19300	10300	5160	10100	18000	7840	23400	11700	e5100	20000	5090
29	4820	15700	11000	e4400	9830	23600	11300	21300	11500	e5200	28600	3830
30	4000	16700	9420	e5200	---	28800	11500	22600	10400	e5500	28800	4290

31	5890	---	11700	e3000	---	29800	---	32800	---	e6000	26700	---

TOTAL	144020	420380	386730	248950	199650	554230	410380	542480	909600	249370	298270	269450
MEAN	4646	14010	12480	8031	6884	17880	13680	17500	30320	8044	9622	8982
MAX	6510	27400	22000	12600	12600	32700	29300	32800	49800	11400	28800	23400
MIN	2830	5090	8290	3000	3200	7810	6430	7970	10400	5100	4760	3830

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1982 - 2004, BY WATER YEAR (WY)
MEAN	9144	12400	14300	12790	16950	22730	21970	19460	17810	12980	9419	8867
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 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1982 - 2004
ANNUAL TOTAL	3638620		4633510
ANNUAL MEAN	9969		12660		14880
HIGHEST ANNUAL MEAN					24470	1993
LOWEST ANNUAL MEAN					8323	2003
HIGHEST DAILY MEAN	36600	May 12	49800	Jun 14	111000	Feb 23 1997
LOWEST DAILY MEAN	2300 A	Jan 23	2830	Oct 13	2040	Sep 27 1991
ANNUAL SEVEN-DAY MINIMUM	2740	Jan 14	3590	Oct 5	2140	Sep 24 1991
MAXIMUM PEAK FLOW			52100 B	Jun 14	117000 C	Feb 23 1997
MAXIMUM PEAK STAGE			23.08 D	Jun 17	32.02	Mar 7 1985
10 PERCENT EXCEEDS	21900		25100		29100
50 PERCENT EXCEEDS	7030		9620		11000
90 PERCENT EXCEEDS	3450		4990		5340

	A - Estimated due to backwater from ice.
	B - Gage height, 22.53 ft.
	C - Based on stage-area and velocity ratings; gage height, 27.19 ft.
	D - Discharge, 42500 ft³/s.