05540500 DATA: Discharge Tables, 2002

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 1994-2002.
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 rain gage, 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 plants upstream averaged 43 ft³/s during the year. The maximum monthly average was 52 ft³/s in May, and the minumum was 36 ft³/s in September.

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	252	435	539	e220	286	347	389	587	324	207	162	179
2	247	414	444	e220	304	349	e500	548	304	201	156	171
3	230	362	386	e220	289	388	e470	561	291	185	146	219
4	213	327	367	e220	273	380	e440	454	552	198	139	225
5	805	311	325	e220	262	375	401	403	1770	247	292	180

6	915	308	308	220	251	348	e380	397	1820	212	373	160
7	565	298	299	217	238	454	e600	418	1050	182	232	155
8	408	289	286	217	242	998	e900	376	713	172	198	150
9	333	290	270	218	261	1830	1980	426	545	897	169	146
10	302	275	260	211	456	1900	1780	462	456	1270	153	145

11	299	262	261	210	649	1300	1130	605	605	700	142	141
12	434	254	257	207	563	938	847	3710	607	445	139	137
13	1190	250	359	206	495	e750	698	3690	466	330	164	129
14	4620	280	467	202	438	e650	581	2350	470	267	596	132
15	4800	312	396	212	398	586	513	1350	557	234	714	127

16	3600	283	352	211	379	513	465	1080	428	217	455	124
17	1900	261	380	211	352	467	439	1570	347	200	337	123
18	1140	255	421	210	330	439	440	1250	324	194	256	130
19	850	262	377	205	374	414	401	921	296	194	225	165
20	692	292	381	205	805	388	658	753	276	174	231	189

21	582	264	368	203	1120	366	762	634	259	162	199	280
22	522	247	327	208	872	342	715	561	240	151	443	236
23	1010	236	349	221	e600	330	623	514	226	165	1510	247
24	1520	249	372	230	e550	319	540	531	222	155	1960	212
25	1660	393	334	226	469	310	696	497	248	148	987	169

26	1370	434	e300	225	440	307	596	495	309	148	567	150
27	931	393	e280	219	407	302	541	432	410	165	400	136
28	719	338	e270	220	375	291	1040	398	295	193	329	126
29	611	314	e260	214	---	301	905	402	241	182	275	124
30	552	398	e230	223	---	508	700	366	221	218	239	134

31	484	---	e225	247	---	448	---	346	---	191	200	---

TOTAL	33756	9286	10450	6698	12478	17638	21130	27087	14872	8604	12388	4941
MEAN	1089	309.5	337.1	216.1	445.6	569.0	704.3	873.8	495.7	277.5	399.6	164.7
MAX	4800	435	539	247	1120	1900	1980	3710	1820	1270	1960	280
MIN	213	236	225	202	238	291	380	346	221	148	139	123
CFSM	3.36	0.96	1.04	0.67	1.38	1.76	2.17	2.70	1.53	0.86	1.23	0.51
IN.	3.88	1.07	1.20	0.77	1.43	2.03	2.43	3.11	1.71	0.99	1.42	0.57

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2002, BY WATER YEAR (WY)
MEAN	201.6	224.1	242.9	252.1	328.2	472.5	520.4	422.0	326.3	232.5	194.4	183.4
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 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1941 - 2002
ANNUAL TOTAL	179266		179328
ANNUAL MEAN	491.1		491.3		299.7
HIGHEST ANNUAL MEAN					564	1993
LOWEST ANNUAL MEAN					94.2	1963
HIGHEST DAILY MEAN	4800	Oct 15	4800	Oct 15	11400	Oct 11 1954
LOWEST DAILY MEAN	124	Jul 16	123	Sep 17	14	Dec 24 1963
ANNUAL SEVEN-DAY MINIMUM	136	Jul 12	129	Sep 12	15	Dec 27 1963
MAXIMUM PEAK FLOW			5010	Oct 15	17300 A	Jul 18 1996
MAXIMUM PEAK STAGE			7.32	Oct 15	14.03 B	Jul 18 1996
INSTANTANEOUS LOW FLOW			118	C	0.20 D	Nov 17 1955
ANNUAL RUNOFF (CFSM)	1.52		1.52		0.92
ANNUAL RUNOFF (INCHES)	20.58		20.59		12.57
10 PERCENT EXCEEDS	913		917		642
50 PERCENT EXCEEDS	338		330		173
90 PERCENT EXCEEDS	174		170		47

	A - From rating curve extended above 14,000 ft³/sec.
	B - From floodmark.
	C - Sept. 17, 18, 28, 29.
	D - Result of freezeup.