05529000 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 42°04'55", long 87°53'25" (NAD of 1927), in SE1/4SE1/4 sec.25, T.42 N., R.11 E., Cook County, Hydrologic Unit 07120004, on right bank 50 ft upstream from Dam No. 2 of Cook County Forest Preserve, 0.3 mi downstream from Lake Avenue Bridge, 1.2 mi upstream from Central Road Bridge, 2.5 mi north of Des Plaines, and at mile 69.3.

DRAINAGE AREA.-- 360 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1940 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-91.

REVISED RECORDS.-- WSP 975: 1942. WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and masonry dam. Datum of gage is 626.31 ft above NGVD of 1929. Prior to Apr. 8, 1941, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 4,900 ft³/s, Oct. 1, 1986, gage height, 10.88 ft; no flow many days in 1944, 1946 and Aug. 7, 8, 1962.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of July 4, 1938, reached a stage of 9.0 ft, from floodmark, discharge, 5,000 ft³/s.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

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	62	80	183	246	e82	631	1040	346	2790	562	68	112
2	57	239	187	236	e82	604	879	319	2250	500	67	95
3	88	739	169	233	e83	604	800	293	1830	497	84	83
4	93	701	158	226	e83	636	742	268	1470	791	340	72
5	75	878	220	234	e84	1350	693	244	1160	666	213	67

6	69	708	244	186	e86	1640	647	210	884	620	142	63
7	69	526	222	152	e90	1520	602	184	756	614	120	63
8	64	422	206	217	e94	1290	554	173	674	615	102	59
9	63	346	215	179	e97	1050	502	169	602	634	87	51
10	61	274	700	164	e98	921	445	196	669	786	79	55

11	62	219	911	158	96	855	386	239	1240	775	70	50
12	59	182	817	162	93	804	336	273	1430	698	67	52
13	67	146	717	165	92	769	301	445	1330	624	64	56
14	233	131	656	163	90	741	281	636	1290	530	59	57
15	235	121	608	156	88	704	260	766	1150	424	55	58

16	128	114	580	146	87	665	241	750	946	298	57	75
17	84	111	547	152	88	624	259	718	839	215	66	78
18	73	474	508	155	86	579	278	1140	779	173	87	73
19	69	665	473	135	96	535	268	1660	725	155	70	70
20	70	505	422	e120	175	490	278	1660	669	133	70	72

21	69	405	358	e100	269	436	365	1880	683	124	60	66
22	71	354	327	e92	290	395	420	2300	778	130	56	49
23	69	347	319	e86	360	364	409	2680	745	190	56	43
24	67	399	293	e84	466	400	394	2830	716	140	70	50
25	94	349	261	e88	482	462	463	3180	714	121	73	53

26	93	300	226	e88	486	618	451	3610	714	108	70	55
27	86	265	216	e87	483	791	413	3740	705	100	75	68
28	81	229	e250	e86	480	851	380	3470	685	86	287	65
29	77	203	276	e84	493	1530	365	2920	652	82	237	64
30	77	187	268	e82	---	1590	351	2610	618	75	168	62

31	79	---	261	e80	---	1320	---	3080	---	71	136	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2004, BY WATER YEAR (WY)
MEAN	157	215	230	233	318	621	629	436	311	179	133	135
MAX	1453	1187	1368	1046	1070	2216	1990	1557	1299	908	726	1191
(WY)	1987	1986	1983	1960	1974	1979	1993	1996	2000	1993	1972	1972
MIN	0.96	3.02	2.73	2.92	5.01	40.7	57.7	41.5	15.3	6.35	0.81	0.30
(WY)	1945	1954	1945	1945	1963	1945	1945	1946	1963	1946	1944	1944

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1941 - 2004
ANNUAL TOTAL	84792		165064
ANNUAL MEAN	232		451		299
HIGHEST ANNUAL MEAN					656	1993
LOWEST ANNUAL MEAN					31.4	1963
HIGHEST DAILY MEAN	1560	May 11	3740	May 27	4870	Oct 1 1986
LOWEST DAILY MEAN	46 A	Feb 24	43	Sep 23	0.00	B
ANNUAL SEVEN-DAY MINIMUM	47	Feb 21	54	Sep 9	0.00	Aug 10 1944
MAXIMUM PEAK FLOW			3760	May 27	4900	Oct 1 1986
MAXIMUM PEAK STAGE			8.51	May 27	10.88	Oct 1 1986
INSTANTANEOUS LOW FLOW			38	Sep 23
ANNUAL RUNOFF (CFSM)	0.645		1.25		0.832
ANNUAL RUNOFF (INCHES)	8.76		17.06		11.30
10 PERCENT EXCEEDS	506		892		776
50 PERCENT EXCEEDS	155		240		139
90 PERCENT EXCEEDS	54		67		12

	A - Estimated.
	B - Many days in 1944, 1946 and Aug. 7, 8, 1962.