05558300 DATA: Discharge Tables, 2002

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 1994-2002.
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, 2,600 ft³/s (estimated), Nov. 12, 1999.
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, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	6560	27000	14300	6760	17600	19200	19400	27600	19200	12000	e6000	6050
2	5310	26500	15500	6500	24700	18200	20800	27000	18300	11600	e5800	4840
3	5040	23700	16700	e7400	28800	18100	23500	24600	17200	10900	e5500	8070
4	5860	24200	15400	e7100	27500	17400	25000	24100	18500	8300	e6800	6190
5	9300	21900	12900	e6500	25400	19300	23800	22100	27600	7970	e7000	6240

6	9830	19500	16000	e6300	24800	19900	21900	22000	32400	7030	7970	5730
7	9180	18700	14500	6820	23000	20300	20600	21500	28400	6790	6470	4930
8	6550	18500	13500	5650	20900	22000	22300	18700	26000	5120	6090	4590
9	5850	15500	12100	7700	18800	31400	28700	20500	24000	9070	5470	4830
10	6730	16000	11300	8900	20500	40100	35000	23800	21300	10500	4960	4310

11	8010	14500	11200	8840	20000	41300	36300	24600	22000	10100	5400	4460
12	8120	13600	10900	9210	22500	38800	34700	39000	21900	8760	4260	3780
13	12700	12300	11800	7070	21100	34100	30600	66100	19100	8070	5560	3170
14	25900	13000	12400	8710	17600	30100	27600	85100	18000	7440	7410	4040
15	33300	11600	12500	8570	19500	30900	25900	78000	18100	6580	6610	3320

16	36200	10600	12800	8010	18500	27300	23900	65600	18500	5980	8090	e3000
17	34600	9800	13800	7190	17500	24500	25000	58200	16000	4820	6580	3600
18	32100	9110	15000	7430	14500	23600	20900	52300	14300	4790	6180	3250
19	31300	10000	18200	5570	15800	22300	23600	48700	13500	5340	6950	3460
20	28700	8140	19100	5570	18100	21300	21100	45200	12600	4750	6760	4680

21	27200	9180	18800	7200	23800	21700	20000	41000	12200	4650	7100	6010
22	24400	8480	16600	e6700	26100	17100	20400	35600	11800	5800	11400	5370
23	25600	8860	17500	8700	25900	16900	19000	36300	11300	4380	18800	6380
24	30600	7180	17000	6550	24500	17800	19400	34900	11000	4390	19500	6720
25	33400	12000	15500	5480	26200	17200	19500	32900	10300	e5000	19900	4430

26	36300	12600	14000	7040	23400	15000	19900	29800	11600	e4500	18100	3810
27	35800	11300	12200	5800	21100	14000	18400	27200	12700	e5400	15900	4320
28	32600	11800	12000	6700	19300	13900	21500	24900	16600	e5100	14500	3540
29	33400	11600	10400	7290	---	14700	27200	23100	15400	e4800	12300	3470
30	31200	10300	7840	6970	---	16200	28800	21500	13100	e4700	7920	4450

31	27100	---	6950	9110	---	17800	---	20900	---	e5200	6870	---

TOTAL	658740	427450	428690	223340	607400	702400	724700	1122800	532900	209830	278150	141040
MEAN	21250	14250	13830	7205	21690	22660	24160	36220	17760	6769	8973	4701
MAX	36300	27000	19100	9210	28800	41300	36300	85100	32400	12000	19900	8070
MIN	5040	7180	6950	5480	14500	13900	18400	18700	10300	4380	4260	3000

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1982 - 2002, BY WATER YEAR (WY)
MEAN	9595	12760	14870	13470	18070	23760	23010	19500	17620	12790	9419	9016
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	5032	3758	4698	5202	7132	8122	10770	8544	7199	5669	3739	2687
(WY)	2000	2000	1990	2000	2000	2000	1986	1989	1988	1991	1991	1991

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1982 - 2002
ANNUAL TOTAL	5758190		6057440
ANNUAL MEAN	15780		16600		15300
HIGHEST ANNUAL MEAN					24470	1993
LOWEST ANNUAL MEAN					10100	2000
HIGHEST DAILY MEAN	71500	Feb 12	85100	May 14	111000	Feb 23 1997
LOWEST DAILY MEAN	3490	Aug 14	3000 A	Sep 16	2040	Sep 27 1991
ANNUAL SEVEN-DAY MINIMUM	4260	Jan 6	3410	Sep 13	2140	Sep 24 1991
MAXIMUM PEAK FLOW			88500 B	May 14	117000 C	Feb 23 1997
MAXIMUM PEAK STAGE			28.28 D	May 18	32.02	Mar 7 1985
10 PERCENT EXCEEDS	31600		30600		29600
50 PERCENT EXCEEDS	12200		14500		11400
90 PERCENT EXCEEDS	5650		5170		5650

	A - Estimated.
	B - Gage height, 26.67 ft.
	C - Based on stage-area and velocity ratings, gage height, 27.19 ft.
	D - Dishcarge, 54,300 ft³/s.