05531500 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN

05531500 SALT CREEK AT WESTERN SPRINGS, IL


LOCATION.-- Lat 41°49'33", long 87°54'02" (NAD of 1927), in NE1/4SE1/4 sec.31, T.39 N., R.12 E., Cook County, Hydrologic Unit 07120004, on left pier at upstream side of bridge on Wolf Road, in Cook County Forest Preserve, 0.5 mi north of Western Springs, and at mile 8.8.

DRAINAGE AREA.-- 115 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1945 to current year.
	STAGE: Water years 1994 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-91 and 1999 to current year.
	MISCELLANEOUS: Contaminants in streambed sediments, August 1998; contaminants in fish tissue, August 1998.
BIOLOGICAL
	BENTHIC MACROINVERTEBRATES: Water year 1999, and 2002.
	FISH: Water years 1999-2000, and 2002-03.
	HABITAT: Water years 1999, and 2002-03.

REVISED RECORDS.-- WSP 1915: Drainage area. WRD IL-87-2: Drainage area. WRD IL-97-2: July 21 - Sept. 26, 1996.

GAGE.-- Water-stage recorder, phone telemeter, crest-stage gage, and water-quality monitor. Datum of gage is 624.93 ft above NGVD of 1929. Prior to July 26, 1946, nonrecording gage at same site and datum.

REMARKS.-- Occasional regulation by sewage treatment plants upstream from station. Since May 28, 1996, some flow temporarily diverted for flood control to Elmhurst Quarry Flood Control Reservoir 12.3 miles upstream from gage.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,540 ft³/s, Aug. 17, 1987, gage height, 10.54 ft; minimum, no flow, May 27, 1998, due to bridge construction.

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

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	90	73	69	74	e84	58	112	1050	145	66	299	164
2	131	69	70	71	e78	58	101	1160	115	62	543	123
3	129	71	71	71	83	59	99	929	126	66	402	83
4	226	68	70	68	75	61	381	599	104	76	570	65
5	206	75	68	70	62	61	619	901	90	143	483	62

6	159	76	67	74	58	67	493	899	83	162	321	58
7	126	72	64	70	34	67	333	719	82	211	410	52
8	100	70	66	70	55	68	277	435	137	216	406	51
9	84	69	65	70	e57	76	238	885	214	226	267	51
10	77	74	63	71	e56	67	238	944	150	224	187	52

11	71	72	61	65	e55	73	214	941	120	173	158	52
12	69	69	64	e60	e54	93	176	766	104	131	134	50
13	69	68	65	e65	e54	128	146	592	91	108	120	52
14	64	90	63	e66	e54	126	139	385	80	102	180	144
15	63	113	64	e58	e54	116	153	428	73	344	173	151

16	60	85	65	e56	e52	120	141	436	67	372	151	96
17	55	71	65	e55	e52	123	127	306	65	279	102	69
18	66	69	250	e54	52	117	92	228	91	318	84	58
19	60	87	340	e54	51	103	87	188	188	178	77	48
20	57	77	200	e58	55	145	95	199	152	151	76	43

21	55	91	147	e57	57	148	89	180	113	296	69	40
22	50	103	114	e53	59	126	89	163	92	300	65	77
23	43	84	96	e52	59	111	82	131	81	213	58	57
24	43	76	89	e55	67	99	78	114	77	162	53	47
25	132	75	82	e55	64	109	80	97	71	135	51	46

26	139	74	77	e54	62	117	72	83	71	123	53	80
27	124	73	76	e54	58	101	77	80	70	113	61	131
28	111	74	75	e59	58	141	78	116	67	114	53	86
29	103	70	72	e60	---	187	75	147	64	115	59	64
30	86	72	75	e60	---	157	274	133	61	112	48	50

31	72	---	78	e64	---	129	---	208	---	111	47	---

TOTAL	2920	2310	2891	1923	1659	3211	5255	14442	3044	5402	5760	2202
MEAN	94.2	77.0	93.3	62.0	59.2	104	175	466	101	174	186	73.4
MAX	226	113	340	74	84	187	619	1160	214	372	570	164
MIN	43	68	61	52	34	58	72	80	61	62	47	40
CFSM	0.82	0.67	0.81	0.54	0.52	0.90	1.52	4.05	0.88	1.52	1.62	0.64
IN.	0.94	0.75	0.94	0.62	0.54	1.04	1.70	4.67	0.98	1.75	1.86	0.71

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1946 - 2003, BY WATER YEAR (WY)
MEAN	92.4	108	108	113	136	208	235	172	138	96.0	111	91.8
MAX	515	457	500	368	444	809	565	480	388	288	795	414
(WY)	2002	1986	1983	1993	1997	1979	1983	1996	1996	1978	1987	1972
MIN	3.34	5.55	8.14	5.79	12.4	46.1	41.8	24.8	25.6	10.6	3.08	3.33
(WY)	1949	1949	1954	1954	1954	1956	1946	1946	1956	1946	1948	1952

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1946 - 2003
ANNUAL TOTAL	65691		51019
ANNUAL MEAN	180		140		134
HIGHEST ANNUAL MEAN					250	1993
LOWEST ANNUAL MEAN					36.6	1953
HIGHEST DAILY MEAN	1380	Aug 23	1160	May 2	3220	Aug 17 1987
LOWEST DAILY MEAN	43	Oct 23,24	34	Feb 7	1.0	Aug 27 1950
ANNUAL SEVEN-DAY MINIMUM	53	Oct 18	51	Sep 19	2.1	Oct 15 1948
MAXIMUM PEAK FLOW			1220	May 1	3540	Aug 17 1987
MAXIMUM PEAK STAGE			7.36	May 1	10.54	Aug 17 1987
INSTANTANEOUS LOW FLOW					0.00 A	May 27 1998
ANNUAL RUNOFF (CFSM)	1.57		1.22		1.17
ANNUAL RUNOFF (INCHES)	21.25		16.50		15.83
10 PERCENT EXCEEDS	341		278		303
50 PERCENT EXCEEDS	114		78		76
90 PERCENT EXCEEDS	69		54		16

A - Due to bridge construction.