05540500 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN

05540500 DU PAGE RIVER AT SHOREWOOD, IL


LOCATION.-- Lat 41°31'20", long 88°11'33" (NAD of 1927), in SE1/4SW1/4 sec.10, T.35 N., R.9 E., Will County, Hydrologic Unit 07120004, on left bank 400 ft upstream from bridge on U.S. Highway 52 at Shorewood, 3.8 mi downstream from Lily Cache Creek and at mile 10.6.

DRAINAGE AREA.-- 324 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1940 to current year. Published as "at Troy" 1940-65.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-91.
	WATER TEMPERATURE: Water years 1964-76.
	MISCELLANEOUS: Water years 1998 and 2002.

REVISED RECORDS.-- WSP 1035: 1944. WSP 1055: 1942(M). WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, U.S. Army Corps of Engineers satellite telemeter, and masonry dam. Datum of gage is 564.62 ft above NGVD of 1929 (Illinois Department of Transportation bench mark). Prior to Apr. 11, 1941, nonrecording gage at same site and datum.

REMARKS.-- Streamflow contains effluent from sewage-treatment plants upstream.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 17,300 ft³/s, July 18, 1996, from rating curve extended above 14,000 ft³/s, gage height, 14.03 ft, from floodmark; minimum 0.2 ft³/s, Nov. 17, 1955, result of freezeup.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. Effluent from sewage-treatment plant upstream averaged about 35 ft³/s during the year.

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	152	138	295	242	e180	320	904	295	2330	214	178	512
2	151	235	276	234	e200	414	705	285	1730	208	172	381
3	141	740	265	227	e220	404	575	259	1150	206	167	307
4	151	927	252	227	e210	375	496	239	797	311	440	268
5	154	1790	343	242	e200	1510	437	224	606	276	583	241

6	142	1560	497	172	e195	1980	400	212	496	327	365	218
7	138	867	401	e185	e190	1430	369	216	425	612	278	209
8	130	557	342	e195	e185	901	335	212	372	397	227	203
9	125	429	327	e200	e180	695	317	208	329	314	194	197
10	126	367	1080	e195	e175	563	297	230	369	493	187	186

11	123	330	1800	188	e172	486	284	220	1480	435	176	186
12	119	299	1230	192	162	419	273	245	3300	367	168	183
13	119	253	781	205	165	372	258	289	2840	317	166	175
14	173	233	591	197	173	370	252	608	1740	275	165	171
15	373	220	491	187	163	389	246	1080	1170	241	158	166

16	282	217	436	189	163	353	234	766	830	222	153	215
17	207	220	385	188	166	341	222	516	642	207	151	214
18	172	946	351	201	156	351	216	507	532	186	187	186
19	151	1870	327	165	163	384	213	543	446	185	221	164
20	142	1300	291	e180	246	384	233	433	384	198	205	154

21	142	773	272	e180	559	389	359	407	358	201	193	147
22	127	571	261	e170	490	344	365	667	535	317	173	149
23	123	486	259	e165	477	321	304	993	460	267	161	147
24	127	822	252	e165	554	355	269	847	371	242	200	140
25	185	725	243	e170	497	541	403	606	341	213	434	133

26	228	536	241	e175	424	629	442	525	308	195	518	131
27	175	446	240	e180	381	951	340	431	276	189	774	129
28	166	370	247	e175	340	758	284	373	260	179	2290	132
29	150	332	300	e175	317	1960	268	322	252	173	e2400	130
30	140	310	277	e170	---	1870	272	633	232	176	e1400	129

31	140	---	254	e175	---	1300	---	2120	---	182	801	---

TOTAL	4974	18869	13607	5911	7703	21859	10572	15511	25361	8325	13885	5903
MEAN	160	629	439	191	266	705	352	500	845	269	448	197
MAX	373	1870	1800	242	559	1980	904	2120	3300	612	2400	512
MIN	119	138	240	165	156	320	213	208	232	173	151	129
CFSM	0.50	1.94	1.35	0.59	0.82	2.18	1.09	1.54	2.61	0.83	1.38	0.61
IN.	0.57	2.17	1.56	0.68	0.88	2.51	1.21	1.78	2.91	0.96	1.59	0.68

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2004, BY WATER YEAR (WY)
MEAN	200	229	245	250	325	472	515	429	333	237	201	184
MAX	1474	788	1257	927	1267	1946	1418	1105	946	1337	1245	908
(WY)	1955	1986	1983	1993	1997	1979	1983	1974	1996	1996	1987	1961
MIN	26.2	27.4	22.7	30.8	28.4	71.2	102	99.5	68.6	45.8	31.2	26.8
(WY)	1957	1957	1964	1954	1964	1945	1963	1958	1963	1956	1941	1946

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1941 - 2004
ANNUAL TOTAL	127248		152480
ANNUAL MEAN	349		417		301
HIGHEST ANNUAL MEAN					564	1993
LOWEST ANNUAL MEAN					94.2	1963
HIGHEST DAILY MEAN	2020	May 10	3300	Jun 12	11400	Oct 11 1954
LOWEST DAILY MEAN	113 A	Jan 11	119	Oct 12	14	Dec 24 1963
ANNUAL SEVEN-DAY MINIMUM	126	Oct 7	126	Oct 7	15	Dec 27 1963
MAXIMUM PEAK FLOW			3840	Jun 12	17300 B	Jul 18 1996
MAXIMUM PEAK STAGE			6.17	Jun 12	14.03 C	Jul 18 1996
INSTANTANEOUS LOW FLOW			107	D	0.20 A	Nov 17 1955
ANNUAL RUNOFF (CFSM)	1.08		1.29		0.930
ANNUAL RUNOFF (INCHES)	14.61		17.51		12.64
10 PERCENT EXCEEDS	776		807		642
50 PERCENT EXCEEDS	224		268		175
90 PERCENT EXCEEDS	142		155		48

	A - Result of freezeup.
	B - From rating curve extended above 14,000 ft³/s.
	C - From floodmark.
	D - Oct. 11-13 and 23.