05536105 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°58'27", long 87°42'22" (NAD of 1927), in NW1/4SW1/4 sec.12, T.40 N., R.13 E., Cook County, Hydrologic Unit 07120003, on right downstream side of bridge in West River Park in Chicago, 0.1 mi upstream from North Shore Channel, and at mile 43.4.

DRAINAGE AREA.-- 113 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1989 to September 1998; June 2000 to current year.
	STAGE: October 1994 to September 1998, June 2000 to current year.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 580.67 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,360 ft³/s, Feb. 21, 1997, gage height 6.81 ft; minimum discharge, 3.6 ft³/s, Aug. 5,6, 1993.

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

DISCHARGE (CR10), 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	100	286	144	e32	73	59	93	96	50	34	22	119
2	82	156	96	e31	79	71	111	445	45	33	30	173
3	58	140	83	e30	60	91	100	428	49	31	20	358
4	63	122	68	e29	51	83	89	221	717	32	26	170
5	264	96	61	e28	53	76	80	129	956	26	58	116

6	114	107	58	e27	58	77	78	110	660	30	33	94
7	64	89	54	e27	46	96	92	102	402	34	18	67
8	52	75	48	e27	52	277	221	116	281	24	20	51
9	47	61	43	e28	63	681	632	177	235	165	20	42
10	47	57	39	e28	135	573	571	128	256	72	19	43

11	59	52	39	e28	174	319	384	258	265	44	21	45
12	340	49	39	29	126	238	264	1180	230	35	16	36
13	721	48	116	28	101	196	200	939	142	30	109	33
14	1600	46	109	28	84	157	163	501	195	21	460	31
15	1280	45	88	31	75	139	132	347	218	23	241	28

16	936	44	68	33	71	108	116	518	145	23	89	26
17	619	43	84	36	64	88	116	705	119	23	57	29
18	523	41	80	40	57	83	109	418	96	20	37	58
19	488	45	74	48	74	76	99	251	60	22	42	55
20	498	43	78	41	215	72	109	195	61	21	55	137

21	487	41	78	28	283	64	122	140	55	19	32	163
22	370	39	59	29	211	60	168	120	48	19	1350	118
23	802	35	60	30	150	56	111	92	41	21	1490	123
24	1130	40	56	32	119	52	102	74	39	20	833	72
25	1120	64	51	33	97	49	114	69	61	20	385	55

26	808	54	e49	33	84	53	88	71	44	22	262	52
27	573	48	e45	31	76	49	110	59	40	43	388	46
28	483	44	e43	31	65	45	199	55	37	36	320	39
29	491	53	e39	33	---	99	141	56	38	33	216	79
30	478	134	e36	35	---	178	108	56	36	28	111	104

31	425	---	e34	40	---	107	---	53	---	20	151	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2002, BY WATER YEAR (WY)
MEAN	117.6	128.0	88.85	114.1	162.8	189.3	203.0	195.2	156.2	97.91	131.2	94.09
MAX	488	266	175	280	394	288	514	446	332	189	342	247
(WY)	2002	1991	1992	1993	1997	1993	1993	1996	1996	1993	1990	2001
MIN	38.7	46.9	31.3	31.7	50.3	69.9	84.1	45.0	46.0	33.0	48.3	24.1
(WY)	1995	1997	1990	2002	1995	1996	1994	1992	1992	2002	1996	1994

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1990 - 2002
ANNUAL TOTAL	66927		56759
ANNUAL MEAN	183.4		155.5		139.1
HIGHEST ANNUAL MEAN					201	1993
LOWEST ANNUAL MEAN					95.2	1994
HIGHEST DAILY MEAN	1600	Oct 14	1600	Oct 14	1990	Feb 22 1997
LOWEST DAILY MEAN	15	Jul 31,Aug 1	16	Aug 12	11	Oct 11 1992
ANNUAL SEVEN-DAY MINIMUM	30	Jun 30	20	Jul 18	14	Sep 16 1994
MAXIMUM PEAK FLOW			1800	Aug 22	2360	Feb 21 1997
MAXIMUM PEAK STAGE			6.24	Aug 22	6.81	Feb 21 1997
INSTANTANEOUS LOW FLOW			12	Aug 12	3.6	A
ANNUAL RUNOFF (CFSM)	1.62		1.38		1.23
ANNUAL RUNOFF (INCHES)	22.03		18.69		16.73
10 PERCENT EXCEEDS	473		421		325
50 PERCENT EXCEEDS	90		71		71
90 PERCENT EXCEEDS	38		28		28

A - Aug. 5, 6, 1993.