05543500 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN

05543500 ILLINOIS RIVER AT MARSEILLES, IL


LOCATION.-- Lat 41°19'37", long 88°43'03" (NAD of 1927), in SE1/4SW1/4 sec.13, T.33 N., R.4 E., La Salle County, Hydrologic Unit 07120005, on right bank 0.5 mi downstream from Marseilles Dam in Marseilles, 6.9 mi upstream from Fox River, and at mile 246.5.

DRAINAGE AREA.-- 8,259 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 1919 to current year. Prior to October 1939, published as "at Morris."
	STAGE: Water years 1994-2002.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1975-96.
	SPECIFIC CONDUCTANCE: Water years 1975-81.
	WATER TEMPERATURE: Water years 1975-81.
	MISCELLANEOUS: Water Year 1998; Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996.

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

GAGE.-- Water-stage recorder, phone telemeter, and U.S. Army Corps of Engineers satellite telemeter and rain gage. Datum of gage is 462.91 ft above NGVD of 1929. October 1919 to January 1935, nonrecording gage at site at Morris, 16.6 mi upstream, at datum 478.50 ft above NGVD of 1929. January 1935 to September 1939, water-stage recorder at site 300 ft downstream from site used 1919-35 and at that datum.

REMARKS.-- Figures of daily discharge include flow through navigation locks. Flow regulated by powerplants and navigation dam above station. Since Jan. 17, 1900, flow has included diversion from Lake Michigan through Chicago Sanitary and Ship Canal.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 95,000 ft³/s, Feb. 22, 1997, gage height, 16.85 ft; minimum daily discharge, 1,460 ft³/s, Oct. 16, 1943 and Nov. 10, 1999.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: A stage of 26.2 ft at Morris occurred in 1831, and a stage of 25.4 ft (ice jam) occurred at present site on Jan. 21, 1916.

REMARKS FOR CURRENT YEAR.-- Records good.

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	4620	16000	10000	4990	19400	10400	14900	19800	10200	6330	5520	4450
2	4020	14100	12200	5380	24600	10300	16700	18400	9250	5280	4780	5340
3	3670	15400	10600	5380	24400	10900	21400	17300	9520	5570	4540	4780
4	3910	15000	10600	5380	22500	12600	20000	15800	13100	5240	5930	4260
5	8940	12100	9710	5280	19700	13300	16300	14600	12900	5830	5940	4370

6	7820	11200	9360	5510	17700	13300	14800	12500	14200	4380	6500	3890
7	7160	10500	8520	5540	14900	14500	14600	13000	13500	4680	5860	3920
8	5910	10200	8320	5310	13200	23300	16200	11900	12200	4730	4840	3130
9	5180	8800	7630	5900	12600	37400	32600	15100	12000	7380	4270	3790
10	5280	8180	6970	4900	14200	40100	33900	22000	10500	8540	4330	2180

11	5260	8250	6530	5900	16100	32600	27800	22100	12500	7040	4620	3300
12	7880	7670	6570	5160	13800	25800	22200	52000	11000	6230	3430	2710
13	12800	7010	7120	5190	12500	22500	18900	76700	10100	5460	4870	2510
14	31600	8010	8120	5150	11500	20100	17100	67300	9640	5380	4820	2950
15	36900	7730	8130	5170	9970	17100	14800	51300	11500	4550	6030	2650

16	33700	7170	7850	4710	9900	15500	13500	42200	10700	4100	5970	2380
17	29400	6640	9850	5490	9190	14500	13100	39300	9490	4510	5500	2340
18	26500	6660	11800	4230	8390	13000	11600	34600	9290	2710	3650	3120
19	23900	5970	12800	4210	8900	11000	11000	29700	7210	4990	4960	3770
20	21400	5980	13000	4840	11600	10800	12700	25300	7160	3950	5240	4080

21	19100	6150	12500	4610	18400	11100	13300	21600	6620	3670	8170	4410
22	17600	6840	10600	4070	20200	9490	12500	19200	6350	4400	14600	4500
23	22400	6020	10300	4570	18900	8550	11800	17500	6460	3490	17700	3570
24	26700	5850	9770	4580	17700	8610	11300	17200	5980	3660	14500	3280
25	29600	6330	9120	4740	15800	8560	12100	16900	6310	4310	13700	3210

26	31900	7360	8270	4360	13000	7920	12500	14700	6370	3650	11400	1990
27	29200	5840	7970	4320	12800	8460	13100	13200	6890	4930	9740	3420
28	27200	6420	7990	4690	10800	7550	17600	11700	7390	4110	8200	2810
29	24700	6450	6680	4190	---	8980	24200	10800	6930	4010	6820	3140
30	22000	7930	4910	5160	---	11100	21900	11000	7160	5500	5050	2900

31	18600	---	5800	9320	---	14000	---	10100	---	4730	5440	---

TOTAL	554850	257760	279590	158230	422650	473320	514400	764800	282420	153340	216920	103150
MEAN	17900	8592	9019	5104	15090	15270	17150	24670	9414	4946	6997	3438
MAX	36900	16000	13000	9320	24600	40100	33900	76700	14200	8540	17700	5340
MIN	3670	5840	4910	4070	8390	7550	11000	10100	5980	2710	3430	1990

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1920 - 2002, BY WATER YEAR (WY)
MEAN	7596	8494	9668	9983	11850	15100	16230	13830	11820	9205	7790	7663
MAX	21050	24180	30100	28430	25970	41290	33180	35180	25940	21020	19220	22770
(WY)	1927	1986	1983	1993	1997	1979	1922	1943	1993	1957	1924	1993
MIN	3169	2278	3739	3186	3264	5153	6516	5649	4346	4687	4242	3345
(WY)	2000	2000	1944	2000	1963	1964	1986	1988	1988	1988	1939	1999

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1920 - 2002
ANNUAL TOTAL	3868540		4181430
ANNUAL MEAN	10600		11460		10760
HIGHEST ANNUAL MEAN					17850	1993
LOWEST ANNUAL MEAN					5583	1964
HIGHEST DAILY MEAN	61000	Feb 10	76700	May 13	89600	Feb 22 1997
LOWEST DAILY MEAN	2730	Aug 14	1990	Sep 26	1460	A
ANNUAL SEVEN-DAY MINIMUM	3790	Jan 2	2670	Sep 12	1990 B	Jan 9 1999
MAXIMUM PEAK FLOW			79200	May 13	95000	Feb 22 1997
MAXIMUM PEAK STAGE			14.52	May 13	16.85	Feb 22 1997
INSTANTANEOUS LOW FLOW			701	Oct 3,Jul 22
10 PERCENT EXCEEDS	21300		22100		19400
50 PERCENT EXCEEDS	7850		8610		8960
90 PERCENT EXCEEDS	4460		4090		4500

	A - Oct. 16, 1943 and Nov. 10, 1999.
	B - Period estimated due to backwater from ice.