05530990 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 42°03'37", long 88°01'00" (NAD of 1927), in SW1/4NW1/4 sec.8, T.41 N., R.11 E., Cook County, Hydrologic Unit 07120004, on left bank at upstream side of bridge on Algonquin Road in Rolling Meadows, 0.25 mi downstream from Arlington Heights Branch Salt Creek, and at mile 35.6.

DRAINAGE AREA.-- 30.5 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1973 to current year. August 1950 to September 1971, and October 1972 to September 1973 at site 0.9 mi downstream, published as Salt Creek near Arlington Heights. Records may not be equivalent.
	STAGE: Water years 1994-2002.
	PARTIAL RECORD: Annual maximum, water year 1972.

REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-93-2: 1992.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 686.40 ft above NGVD of 1929 (Cook County Highway Department bench mark).

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,650 ft³/s, Aug. 14, 1987, gage height, 14.03 ft; no flow, Jan. 12-Feb. 8, 1977, as a result of freezeup, Aug. 20, 25, 1986, and Sept. 8, 9, 11, 1999.

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

DISCHARGE, 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	14	34	44	e5.0	28	13	22	59	6.0	3.8	0.63	8.5
2	9.8	22	31	e4.7	19	23	27	196	4.7	5.2	0.39	118
3	9.2	17	22	e4.4	16	27	22	69	27	5.3	0.43	58
4	16	14	18	e4.4	12	21	17	42	657	5.4	3.9	30
5	45	13	16	e4.2	11	16	15	32	401	4.8	15	18

6	17	12	17	e4.2	8.7	20	12	26	127	7.0	2.9	9.5
7	8.8	11	12	e4.3	10	29	30	22	95	6.8	1.3	6.7
8	5.6	10	10	4.4	14	172	118	19	55	4.9	0.78	4.6
9	4.1	7.6	8.3	4.8	23	248	256	35	55	51	0.58	3.9
10	9.9	6.1	7.7	5.1	50	92	91	18	41	7.2	0.51	4.1

11	14	5.1	6.6	5.2	43	54	59	121	83	3.2	0.44	3.5
12	53	4.8	11	5.4	34	42	45	447	49	1.7	0.37	2.2
13	542	3.8	57	5.1	27	37	36	136	31	1.1	151	1.9
14	680	5.0	38	5.6	22	33	30	62	34	1.2	87	1.5
15	230	4.7	29	6.5	20	28	28	43	29	1.1	30	1.2

16	78	5.0	27	6.9	19	23	21	142	19	1.1	13	1.3
17	50	4.4	29	7.5	17	20	27	e115	12	1.3	7.0	1.5
18	50	4.5	24	6.0	14	18	18	e60	8.9	1.5	3.6	3.2
19	57	7.3	31	5.2	35	16	16	e36	11	1.1	8.2	44
20	34	5.2	26	4.7	100	16	14	e28	10	1.1	4.1	52

21	32	3.8	21	5.0	79	17	37	e21	4.9	1.0	25	27
22	52	3.9	22	5.3	48	16	31	e19	3.4	1.2	982	61
23	542	3.7	26	7.8	37	16	21	e17	2.4	1.1	404	22
24	342	21	20	10	30	13	22	19	2.2	0.97	148	9.1
25	185	34	17	8.8	26	11	21	25	2.2	1.0	95	5.3

26	75	19	13	8.0	24	8.7	14	20	1.5	1.0	88	3.8
27	63	17	12	7.7	19	7.7	33	14	1.7	6.3	75	3.3
28	53	13	9.9	8.2	15	6.8	49	16	2.1	2.3	52	2.9
29	56	20	9.3	7.9	---	44	33	11	2.2	18	37	28
30	65	68	e7.4	7.7	---	36	23	9.0	2.4	2.2	26	8.5

31	60	---	e6.2	15	---	23	---	7.0	---	0.97	10	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1974 - 2002, BY WATER YEAR (WY)
MEAN	19.74	28.66	28.07	25.07	35.27	49.49	58.94	42.47	29.11	18.29	27.83	20.65
MAX	111	120	107	85.7	113	202	136	148	87.6	83.6	136	77.0
(WY)	2002	1986	1983	1999	1997	1979	1983	1996	1996	1993	1987	2001
MIN	2.42	2.32	0.62	0.13	2.43	10.5	9.73	7.33	3.15	3.00	2.56	1.63
(WY)	1980	1977	1977	1977	1978	2000	1989	1977	1988	1979	1986	1974

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1974 - 2002
ANNUAL TOTAL	14554.43		14447.67
ANNUAL MEAN	39.88		39.58		31.92
HIGHEST ANNUAL MEAN					52.1	1993
LOWEST ANNUAL MEAN					9.25	1977
HIGHEST DAILY MEAN	892	Sep 19	982	Aug 22	1180	Aug 14 1987
LOWEST DAILY MEAN	0.31	Sep 16	0.37	Aug 12	0.00	A
ANNUAL SEVEN-DAY MINIMUM	0.85	Jul 10	0.98	Aug 6	0.00	Jan 12 1977
MAXIMUM PEAK FLOW			1450	Oct 13	1650	Aug 14 1987
MAXIMUM PEAK STAGE			10.88	Oct 13	14.03	Aug 14 1987
INSTANTANEOUS LOW FLOW			0.23	Aug 2,12
ANNUAL RUNOFF (CFSM)	1.31		1.30		1.05
ANNUAL RUNOFF (INCHES)	17.75		17.62		14.22
10 PERCENT EXCEEDS	69		71		73
50 PERCENT EXCEEDS	16		16		13
90 PERCENT EXCEEDS	2.0		2.2		1.7

A - Jan. 12 - Feb. 8, 1977, result of freezeup; Aug. 20, 25, 1986 and Sept. 8, 9, 11, 1999.