05540500 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05540500 DU PAGE RIVER AT SHOREWOOD, IL

LOCATION.-- Lat 41°31'20", long 88°11'33", 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 1994-2001.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-91.

WATER TEMPERATURE: Water years 1964-76.

MISCELLANEOUS: June and July 1998.

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 sea level (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 37.2 ft³/s during the year. The maximum monthly average was 46.9 ft³/s in February, and the minimum was 33.3 ft³/s in December.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	174	157	294	e170	997	675	317	332	543	158	172	613
2	169	149	266	e175	748	596	315	301	680	150	172	434
3	180	166	252	e180	600	528	305	280	699	178	225	312
4	488	154	248	e185	491	489	286	265	526	204	215	250
5	740	145	246	e195	435	451	272	261	602	175	177	236

6	519	148	243	e205	421	411	469	249	1220	162	160	204
7	395	683	239	e205	393	389	766	266	914	152	157	448
8	309	757	237	e200	473	359	627	315	657	163	152	465
9	266	826	224	e190	3170	345	528	286	511	160	149	328
10	256	1690	230	e180	3790	342	515	261	431	159	166	337

11	235	1280	226	e170	2380	329	460	507	379	149	199	301
12	209	780	186	e175	1360	354	563	800	383	139	166	243
13	189	623	186	e185	1010	449	581	528	461	142	145	211
14	178	615	e195	235	937	434	469	405	347	132	165	199
15	174	492	e205	399	1080	466	561	362	313	127	156	179

16	171	417	e205	564	909	826	728	320	301	124	188	162
17	186	371	e200	515	741	927	595	315	257	146	323	162
18	170	332	e195	444	608	920	491	295	234	141	262	176
19	163	302	e190	e390	549	806	435	264	257	142	272	855
20	163	289	e185	e330	519	698	486	241	237	141	248	1610

21	166	285	e180	e295	478	620	743	246	228	136	210	1620
22	167	266	e175	e270	432	551	912	321	239	278	199	1360
23	166	256	e170	e250	411	507	746	289	226	562	211	1060
24	190	245	e170	e240	589	454	934	271	207	568	271	1280
25	174	240	e165	e225	2180	424	753	258	193	714	332	1050

26	166	297	e160	e220	1740	383	599	453	200	777	865	682
27	158	352	e160	e225	1100	369	506	781	177	431	615	503
28	156	315	e160	e230	820	355	430	684	168	280	381	392
29	150	295	e165	272	---	342	385	541	167	226	282	323
30	151	300	e165	1040	---	330	348	440	172	198	239	280

31	160	---	e170	1300	---	318	---	357	---	190	406	---

TOTAL	7138	13227	6292	9859	29361	15447	16125	11494	11929	7404	7880	16275
MEAN	230	441	203	318	1049	498	538	371	398	239	254	542
MAX	740	1690	294	1300	3790	927	934	800	1220	777	865	1620
MIN	150	145	160	170	393	318	272	241	167	124	145	162
CFSM	.71	1.36	.63	.98	3.24	1.54	1.66	1.14	1.23	.74	.78	1.67
IN.	.82	1.52	.72	1.13	3.37	1.77	1.85	1.32	1.37	.85	.90	1.87

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2001, BY WATER YEAR (WY)
MEAN	187	223	241	253	326	471	517	415	324	232	191	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 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1941 - 2001
ANNUAL TOTAL	142474		152431
ANNUAL MEAN	389		418		297
HIGHEST ANNUAL MEAN					564	1993
LOWEST ANNUAL MEAN					94.2	1963
HIGHEST DAILY MEAN	3610	Apr 21	3790	Feb 10	11400	Oct 11 1954
LOWEST DAILY MEAN	118	Jan 21	124	Jul 16	14	Dec 24 1963
ANNUAL SEVEN-DAY MINIMUM	145	Sep 4	136	Jul 12	15	Dec 27 1963
MAXIMUM PEAK FLOW			4240	Feb 9	17300 A	Jul 18 1996
MAXIMUM PEAK STAGE			6.56	Feb 9	14.03 B	Jul 18 1996
INSTANTANEOUS LOW FLOW			118	Jul 15-17	.20 C	Nov 17 1955
ANNUAL RUNOFF (CFSM)	1.20		1.29		.92
ANNUAL RUNOFF (INCHES)	16.36		17.50		12.44
10 PERCENT EXCEEDS	789		780		638
50 PERCENT EXCEEDS	248		295		171
90 PERCENT EXCEEDS	158		162		47

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