05552500 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN

05552500 FOX RIVER AT DAYTON, IL


LOCATION.-- Lat 41°23'04", long 88°47'21" (NAD of 1927), in SW1/4SE1/4 sec.29, T.34 N., R.4 E., La Salle County, Hydrologic Unit 07120007, on left bank under County Highway 18 bridge in Dayton, and at mile 5.2.

DRAINAGE AREA.-- 2,642 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: November 1914 to current year. Prior to April 1925, published as "at Wedron." Monthly discharge only for some periods, published in WSP 1308.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-92 and 1996.
	MISCELLANEOUS: Sediment concentration and particle size, water years 1996-97, 2003.

REVISED RECORDS.-- WSP 730: 1931. WSP 1208: 1930, 1935, 1939. WSP 1308: 1916(M), 1922(M), 1926-31(M), 1934-40(M), 1946-47(M). WDR IL-75-1: Drainage area. WDR IL-76-1: 1969.

GAGE.-- Water-stage recorder, phone telemeter, U.S. Army Corps of Engineers satellite telemeter, automatic sediment sampler, and crest-stage gage. Datum of gage is 462.30 ft above NGVD of 1929. Prior to Apr. 13, 1925, nonrecording gage at site 4.1 mi upstream at datum 496.80 ft above Memphis datum. Apr. 13, 1925, to Sept. 30, 1942, nonrecording gage at site 1,000 ft upstream at datum 7.70 ft below NGVD of 1929. Oct. 1, 1942, to Apr. 10, 1951, nonrecording gage, and Apr. 11, 1951, to Sept. 30, 1978, water-stage recorder, at site 1.000 ft upstream at same datum. Oct. 1, 1978 to June 11, 1997, water-stage recorder at site 500 ft upstream at same datum.

REMARKS.-- Regulation by hydropower plant upstream from gage.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 55,400 ft³/s, July 19, 1996, gage height, 24.47 ft, from rating curve extended above 43,000 ft³/s; affected by dam failure 500 ft upstream from gage then in use. Maximum gage height, 36.47 ft, Jan. 25, 1960, ice jam; minimum daily discharge, 1.0 ft³/s, Aug. 29, 1934, when turbines were shut down; minimum daily with plant operating, 78 ft³/s, Oct. 29, 1956.

REMARKS FOR CURRENT YEAR.-- Records fair except those for 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	565	686	658	818	e540	e430	1090	1750	1510	637	892	360
2	567	636	640	1160	e540	e430	1040	4250	1520	617	1310	430
3	678	595	720	1320	e540	e440	1050	3290	1430	599	1440	378
4	1120	616	554	903	e540	e440	1280	2540	1380	570	1460	295
5	1480	654	657	629	e540	e450	1910	3150	1350	603	1310	267

6	1400	702	482	586	e540	e450	2030	4270	1290	706	1170	237
7	1280	695	547	589	e540	e440	1770	3740	1200	909	1150	240
8	1180	664	773	563	e540	e440	1750	3440	1230	983	1100	239
9	1070	638	511	541	e540	e450	1520	4860	1450	1300	905	e230
10	924	612	618	562	e550	e450	1360	5640	1320	1550	842	225

11	847	607	772	e640	e550	e450	1330	5620	1250	1460	785	232
12	738	654	748	e520	e550	e450	1200	6260	1170	1260	722	242
13	727	684	655	e560	e550	e480	1200	4880	1270	1230	669	215
14	702	675	614	e610	e550	e480	1190	4130	1220	1140	668	216
15	668	664	589	e640	e540	e470	1110	3990	1160	1430	647	379

16	646	700	602	e650	e540	e500	996	3850	1110	2030	631	354
17	642	725	566	e640	e520	e580	996	3380	1050	1780	509	305
18	654	719	610	e630	e500	724	1290	3080	1050	2800	433	335
19	624	802	742	e620	e470	752	1230	2840	1180	2030	422	302
20	592	1000	689	e630	e430	849	1080	2690	1240	1720	397	266

21	604	1810	606	e630	e390	854	931	2440	1400	1720	376	241
22	614	1700	538	e640	e380	858	736	2200	1070	1670	315	252
23	614	1750	483	e640	e420	966	821	2080	825	1340	398	279
24	624	1260	475	e610	e430	1000	880	1680	731	1150	388	259
25	669	1260	440	e580	e430	971	867	1470	698	998	298	253

26	722	1250	532	e570	e430	1010	861	1410	677	885	e280	295
27	746	1150	546	e560	e430	1050	843	1360	685	768	e310	364
28	882	1080	688	e570	e430	1060	684	1330	656	1120	366	469
29	898	897	680	e580	---	1160	507	1310	673	1110	e290	368
30	835	692	811	e540	---	1170	569	1220	663	950	e300	318

31	718	---	762	e520	---	1140	---	1360	---	811	308	---

TOTAL	25030	26577	19308	20251	13950	21394	34121	95510	33458	37876	21091	8845
MEAN	807	886	623	653	498	690	1137	3081	1115	1222	680	295
MAX	1480	1810	811	1320	550	1170	2030	6260	1520	2800	1460	469
MIN	565	595	440	520	380	430	507	1220	656	570	280	215
CFSM	0.31	0.34	0.24	0.25	0.19	0.26	0.43	1.17	0.42	0.46	0.26	0.11
IN.	0.35	0.37	0.27	0.29	0.20	0.30	0.48	1.34	0.47	0.53	0.30	0.12

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1915 - 2003, BY WATER YEAR (WY)
MEAN	1143	1479	1476	1465	2061	3247	3260	2457	1961	1266	934	972
MAX	5239	5444	7695	4941	5649	11290	9157	7575	6189	5988	4909	5141
(WY)	1955	1986	1983	1960	2001	1979	1979	1974	1996	1996	1924	1972
MIN	141	329	364	335	338	412	418	217	267	174	153	186
(WY)	1957	1954	1940	1940	1934	1934	1934	1934	1934	1934	1934	1946

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1915 - 2003
ANNUAL TOTAL	647828		357411
ANNUAL MEAN	1775		979		1808
HIGHEST ANNUAL MEAN					3940	1993
LOWEST ANNUAL MEAN					330	1934
HIGHEST DAILY MEAN	14700	Jun 5	6260	May 12	46600	Jul 19 1996
LOWEST DAILY MEAN	351	Aug 12	215	Sep 13	1.0 A	Aug 29 1934
ANNUAL SEVEN-DAY MINIMUM	433	Jul 22	228	Sep 8	120	Oct 8 1956
MAXIMUM PEAK FLOW			6840	May 12	55400 B	Jul 19 1996
MAXIMUM PEAK STAGE			10.05	May 12	36.47 C	Jan 25 1960
INSTANTANEOUS LOW FLOW			34 D	Dec 27
ANNUAL RUNOFF (CFSM)	0.67		0.37		0.68
ANNUAL RUNOFF (INCHES)	9.12		5.03		9.30
10 PERCENT EXCEEDS	3710		1690		4100
50 PERCENT EXCEEDS	1180		686		1180
90 PERCENT EXCEEDS	556		379		378

	A - When turbines were shut down; lowest daily mean with plant operating, 78 ft³/s, Oct. 29, 1956.
	B - Gage height, 24.47 ft, from rating curve extended above 43,000 ft³/s, affected by dam failure 500 ft. upstream from gage then in use.
	C - Ice jam.
	D - Result of freezeup or regulation by hydropower plant. May have been less during periods of intermittent missing record; Aug. 22-30, Sept. 8-12, and 18-20.