05531500 DATA: Discharge Tables, 1999

Station list Available data
ILLINOIS RIVER BASIN

05531500 SALT CREEK AT WESTERN SPRINGS, IL

LOCATION.--Lat 41°49'35", long 87°54'00", 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.--October 1945 to current year.

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 and crest-stage gage. Datum of gage is 624.93 ft above sea level. Prior to July 26, 1946, nonrecording gage at same site and datum.

REMARKS.--Records good except those for estimated daily discharges, which are poor. 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. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	121	207	160	e56	344	260	120	483	198	216	61	87
2	83	178	129	e58	411	227	121	343	610	208	56	80
3	205	157	103	e65	438	229	115	264	592	154	55	60
4	135	142	90	e62	409	201	117	236	440	114	55	53
5	264	143	82	e59	367	179	101	214	273	92	53	49

6	352	126	191	e57	355	206	111	247	210	86	52	46
7	273	116	568	e56	340	210	104	268	199	72	61	47
8	219	99	461	e55	301	196	103	249	169	65	63	52
9	137	97	320	e54	278	196	675	219	143	144	55	47
10	96	624	227	e53	255	214	641	196	160	153	59	46

11	74	695	181	e52	273	228	489	199	265	122	57	42
12	69	565	142	e51	369	235	320	793	385	97	88	46
13	64	408	117	e50	357	239	230	591	697	82	88	75
14	63	283	103	e50	297	232	186	348	946	73	84	59
15	63	232	96	e53	253	254	210	229	862	75	67	53

16	61	197	91	e60	195	311	677	180	613	83	62	50
17	344	152	85	e95	181	448	662	386	320	94	58	48
18	1280	131	78	e180	164	472	509	420	225	89	56	44
19	1140	117	80	e160	148	394	352	325	169	81	164	43
20	981	110	71	e130	138	303	273	225	138	90	116	46

21	656	93	69	e180	129	248	275	244	127	108	90	48
22	395	85	70	e1000	117	209	508	631	181	306	75	43
23	274	83	67	e1300	107	178	1340	552	156	176	74	39
24	208	86	e68	1210	114	160	1210	406	163	131	167	38
25	177	78	60	1020	114	146	1050	278	123	100	232	33

26	152	81	54	805	117	135	755	209	88	85	244	32
27	177	74	57	605	261	125	615	174	123	76	186	64
28	321	71	59	551	292	114	901	151	153	67	126	425
29	267	70	61	493	---	108	850	136	145	68	95	599
30	283	141	59	422	---	105	719	119	116	62	76	503

31	258	---	e58	358	---	100	---	118	---	56	73	---

TOTAL	9192	5641	4057	9400	7124	6862	14339	9433	8989	3425	2848	2897
MEAN	297	188	131	303	254	221	478	304	300	110	91.9	96.6
MAX	1280	695	568	1300	438	472	1340	793	946	306	244	599
MIN	61	70	54	50	107	100	101	118	88	56	52	32
CFSM	2.58	1.64	1.14	2.64	2.21	1.92	4.16	2.65	2.61	.96	.80	.84
IN.	2.97	1.82	1.31	3.04	2.30	2.22	4.64	3.05	2.91	1.11	.92	.94

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1946 - 1999, BY WATER YEAR (WY)
MEAN	83.7	107	108	114	132	212	234	163	134	92.9	104	84.1
MAX	331	457	500	368	444	809	565	480	388	288	795	414
(WY)	1955	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 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1946 - 1999
ANNUAL TOTAL	79737		84207
ANNUAL MEAN	218		231		131
HIGHEST ANNUAL MEAN					250	1993
LOWEST ANNUAL MEAN					36.6	1953
HIGHEST DAILY MEAN	1280	Oct 18	1340	Apr 23	3220	Aug 17 1987
LOWEST DAILY MEAN	42	Aug 3	32	Sep 26	1.0	Aug 27 1950
ANNUAL SEVEN-DAY MINIMUM	45	Jul 28	40	Sep 20	2.1	Oct 15 1948
INSTANTANEOUS PEAK FLOW			1550	Apr 23	3540	Aug 17 1987
INSTANTANEOUS PEAK STAGE			7.95	Apr 23	10.54	Aug 17 1987
INSTANTANEOUS LOW FLOW			26	Sep 24, 25	.00 A	May 27 1998
ANNUAL RUNOFF (CFSM)	1.90		2.01		1.14
ANNUAL RUNOFF (INCHES)	25.79		27.24		15.44
10 PERCENT EXCEEDS	473		557		300
50 PERCENT EXCEEDS	144		146		73
90 PERCENT EXCEEDS	61		56		15

A - Due to bridge construction.