05540500 DATA: Discharge Tables, 2003

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 33 ft³/s during the year. The maximum monthly average was 40 ft³/s in May, and the minumum was 30 ft³/s in October.

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	146	134	129	173	e175	145	255	1290	416	138	531	208
2	155	129	133	166	e190	146	227	2010	315	133	1150	369
3	222	130	130	175	e220	145	208	1720	308	135	939	262
4	229	127	134	166	250	156	370	928	306	141	1230	204
5	433	131	130	169	189	148	1220	1470	259	224	837	180

6	311	132	117	176	195	153	959	1680	236	402	603	161
7	225	129	127	183	159	154	614	1040	235	449	1010	149
8	192	124	122	173	114	156	535	696	240	439	792	144
9	160	123	122	171	e150	159	458	1560	374	469	528	144
10	147	124	e140	169	e180	150	417	2020	344	419	385	147

11	136	128	154	113	e170	179	392	1810	296	363	306	143
12	143	135	146	134	e165	177	337	1320	245	276	272	138
13	131	129	149	e170	e160	330	301	901	224	218	247	139
14	129	123	142	e165	e157	316	269	682	208	190	230	151
15	145	135	143	e160	e154	265	244	621	189	441	213	264

16	133	139	144	e152	e152	257	232	594	181	710	204	231
17	127	134	149	e150	e150	265	222	467	178	460	195	186
18	127	141	210	e148	e151	252	217	397	175	1190	191	161
19	139	140	851	e153	e156	246	209	356	225	833	190	143
20	133	150	593	e155	e164	324	205	362	226	482	177	140

21	124	149	364	e154	166	342	210	351	186	543	165	133
22	136	150	281	e150	171	286	202	303	166	652	156	133
23	128	154	233	e145	164	252	201	287	155	399	151	155
24	122	145	218	e142	169	227	189	265	160	297	142	151
25	129	140	209	e143	159	230	180	241	149	255	134	144

26	163	139	190	e149	161	243	173	221	144	206	136	146
27	152	140	186	e150	152	225	163	219	147	744	140	260
28	138	141	185	e150	145	219	154	229	141	1350	137	243
29	145	135	172	e150	---	340	177	288	148	880	141	188
30	140	134	171	e150	---	337	237	272	137	565	139	166

31	129	---	181	e160	---	275	---	469	---	398	133	---

TOTAL	5069	4064	6355	4864	4688	7099	9777	25069	6713	14401	11804	5383
MEAN	164	135	205	157	167	229	326	809	224	465	381	179
MAX	433	154	851	183	250	342	1220	2020	416	1350	1230	369
MIN	122	123	117	113	114	145	154	219	137	133	133	133
CFSM	0.50	0.42	0.63	0.48	0.52	0.71	1.01	2.50	0.69	1.43	1.18	0.55
IN.	0.58	0.47	0.73	0.56	0.54	0.82	1.12	2.88	0.77	1.65	1.36	0.62

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2003, BY WATER YEAR (WY)
MEAN	201	223	242	251	326	469	517	428	325	236	197	183
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 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1941 - 2003
ANNUAL TOTAL	141324		105286
ANNUAL MEAN	387		288		300
HIGHEST ANNUAL MEAN					564	1993
LOWEST ANNUAL MEAN					94.2	1963
HIGHEST DAILY MEAN	3710	May 12	2020	May 10	11400	Oct 11 1954
LOWEST DAILY MEAN	117 A	Dec 6	113 A	Jan 11	14	Dec 24 1963
ANNUAL SEVEN-DAY MINIMUM	126	Dec 3	126	Dec 3	15	Dec 27 1963
MAXIMUM PEAK FLOW			2070	May 2	17300 B	Jul 18 1996
MAXIMUM PEAK STAGE			4.53	May 2	14.03 C	Jul 18 1996
INSTANTANEOUS LOW FLOW			56 A	Dec 6	0.20 A	Nov 17 1955
ANNUAL RUNOFF (CFSM)	1.20		0.89		0.92
ANNUAL RUNOFF (INCHES)	16.23		12.09		12.56
10 PERCENT EXCEEDS	714		552		641
50 PERCENT EXCEEDS	232		176		173
90 PERCENT EXCEEDS	133		133		48

	A - Result of freeze up.
	B - From rating curve extended above 14,000 ft³/s.
	C - From floodmark.