05533000 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°44'20", long 87°53'47" (NAD of 1927), in SE1/4NE1/4 sec.31, T.38 N., R.12 E., Cook County, Hydrologic Unit 07120004, on left bank at upstream side of bridge on German Church Road, 1.1 mi northwest of Willow Springs, and at mile 2.2.

DRAINAGE AREA.-- 16.5 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: July 1951 to current year.
	STAGE: Water years 1994-2002.
SURFACE-WATER QUALITY
	MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.
BIOLOGICAL
	BENTHIC MACROINVERTEBRATES: Water year 2000.
	FISH: Water year 2001.
	HABITAT: Water year 2000.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 606.36 ft above NGVD of 1929. Prior to June 17, 1963, water-stage recorder at same site at datum 3.73 ft higher. June 17, 1963, to June 26, 1964, nonrecording gage at site 0.5 mi upstream at datum 4.82 ft higher.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,680 ft³/s, Sept. 14, 1961, gage height, 13.71 ft, present datum; minimum daily, 0.1 ft³/s, Dec. 9, 1957.

REMARKS FOR CURRENT YEAR.-- Records good. Effluent from sewage-treatment plant 2 mi. upstream averaged 20.0 ft³/s during the year. The maximum monthly average was 27.3 ft³/s in April, and the minimum was 15.0 ft³/s in January and September.

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	18	22	27	15	28	20	27	28	18	16	16	14
2	17	22	21	15	22	26	60	41	17	16	16	24
3	16	20	19	15	20	29	38	28	19	16	14	19
4	34	19	18	15	19	25	31	26	90	16	19	16
5	133	19	18	15	16	23	28	24	53	16	51	15

6	39	19	17	15	18	34	26	33	34	15	20	16
7	26	18	16	15	18	56	42	26	23	15	17	15
8	24	19	15	14	21	155	138	30	18	15	16	14
9	21	18	15	14	34	163	189	49	16	95	15	15
10	20	17	15	14	63	84	78	27	36	27	14	15

11	20	17	15	14	41	54	49	184	51	21	14	15
12	63	17	15	14	31	42	40	397	29	18	15	15
13	316	17	27	14	27	35	34	135	26	17	32	15
14	325	21	22	15	24	28	30	72	66	16	25	14
15	113	17	19	14	24	30	29	47	43	17	18	14

16	72	16	18	15	22	27	24	85	26	17	17	13
17	40	16	28	15	20	25	38	70	23	15	16	14
18	34	15	23	15	20	24	28	44	22	16	14	25
19	29	18	23	14	39	23	27	38	20	16	18	22
20	25	17	21	14	90	24	98	34	17	15	16	26

21	24	16	19	15	61	22	64	25	17	16	15	18
22	23	15	20	15	38	21	46	25	17	15	256	20
23	102	15	24	17	30	20	36	24	17	15	178	17
24	79	19	19	17	27	19	50	27	18	14	79	16
25	78	31	17	16	25	22	45	31	18	14	34	15

26	42	22	17	15	22	22	30	23	19	16	25	14
27	32	22	17	15	23	22	63	21	18	21	21	14
28	28	19	17	16	21	18	83	21	17	16	18	14
29	28	24	16	16	---	44	45	21	16	18	18	16
30	22	47	15	17	---	33	34	20	16	17	15	15

31	23	---	16	22	---	26	---	20	---	16	15	---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2002, BY WATER YEAR (WY)
MEAN	15.95	19.29	19.15	18.46	22.55	31.91	35.77	26.99	21.52	17.97	17.66	17.16
MAX	100	69.6	86.6	59.8	98.8	110	95.0	90.9	68.1	67.7	66.8	106
(WY)	1955	1991	1983	1993	1997	1979	1983	1996	1993	1996	1987	1961
MIN	2.30	2.37	2.83	2.44	4.05	5.88	7.00	4.94	5.64	4.94	4.65	3.01
(WY)	1954	1954	1959	1956	1963	1957	1971	1958	1956	1952	1953	1954

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1951 - 2002
ANNUAL TOTAL	12355		11752
ANNUAL MEAN	33.85		32.20		22.02
HIGHEST ANNUAL MEAN					39.6	1983
LOWEST ANNUAL MEAN					7.79	1953
HIGHEST DAILY MEAN	374	Feb 9	397	May 12	1040	Jul 18 1996
LOWEST DAILY MEAN	13	Jul 14	13	Sep 16	0.10	Dec 9 1957
ANNUAL SEVEN-DAY MINIMUM	14	Jul 8	14	Jan 7	1.0	Feb 3 1959
MAXIMUM PEAK FLOW			962	Oct 13	2680	Sep 14 1961
MAXIMUM PEAK STAGE			8.30	Oct 13	13.71 A	Sep 14 1961
INSTANTANEOUS LOW FLOW			5.2	Feb 5
10 PERCENT EXCEEDS	62		55		41
50 PERCENT EXCEEDS	22		20		13
90 PERCENT EXCEEDS	16		15		4.4

A - Present datum.

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	18	22	27	15	28	20	27	28	18	16	16	14
2	17	22	21	15	22	26	60	41	17	16	16	24
3	16	20	19	15	20	29	38	28	19	16	14	19
4	34	19	18	15	19	25	31	26	90	16	19	16
5	133	19	18	15	16	23	28	24	53	16	51	15

6	39	19	17	15	18	34	26	33	34	15	20	16
7	26	18	16	15	18	56	42	26	23	15	17	15
8	24	19	15	14	21	155	138	30	18	15	16	14
9	21	18	15	14	34	163	189	49	16	95	15	15
10	20	17	15	14	63	84	78	27	36	27	14	15

11	20	17	15	14	41	54	49	184	51	21	14	15
12	63	17	15	14	31	42	40	397	29	18	15	15
13	316	17	27	14	27	35	34	135	26	17	32	15
14	325	21	22	15	24	28	30	72	66	16	25	14
15	113	17	19	14	24	30	29	47	43	17	18	14

16	72	16	18	15	22	27	24	85	26	17	17	13
17	40	16	28	15	20	25	38	70	23	15	16	14
18	34	15	23	15	20	24	28	44	22	16	14	25
19	29	18	23	14	39	23	27	38	20	16	18	22
20	25	17	21	14	90	24	98	34	17	15	16	26

21	24	16	19	15	61	22	64	25	17	16	15	18
22	23	15	20	15	38	21	46	25	17	15	256	20
23	102	15	24	17	30	20	36	24	17	15	178	17
24	79	19	19	17	27	19	50	27	18	14	79	16
25	78	31	17	16	25	22	45	31	18	14	34	15

26	42	22	17	15	22	22	30	23	19	16	25	14
27	32	22	17	15	23	22	63	21	18	21	21	14
28	28	19	17	16	21	18	83	21	17	16	18	14
29	28	24	16	16	---	44	45	21	16	18	18	16
30	22	47	15	17	---	33	34	20	16	17	15	15

31	23	---	16	22	---	26	---	20	---	16	15	---

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	18	22	27	15	28	20	27	28	18	16	16	14
2	17	22	21	15	22	26	60	41	17	16	16	24
3	16	20	19	15	20	29	38	28	19	16	14	19
4	34	19	18	15	19	25	31	26	90	16	19	16
5	133	19	18	15	16	23	28	24	53	16	51	15

6	39	19	17	15	18	34	26	33	34	15	20	16
7	26	18	16	15	18	56	42	26	23	15	17	15
8	24	19	15	14	21	155	138	30	18	15	16	14
9	21	18	15	14	34	163	189	49	16	95	15	15
10	20	17	15	14	63	84	78	27	36	27	14	15

11	20	17	15	14	41	54	49	184	51	21	14	15
12	63	17	15	14	31	42	40	397	29	18	15	15
13	316	17	27	14	27	35	34	135	26	17	32	15
14	325	21	22	15	24	28	30	72	66	16	25	14
15	113	17	19	14	24	30	29	47	43	17	18	14

16	72	16	18	15	22	27	24	85	26	17	17	13
17	40	16	28	15	20	25	38	70	23	15	16	14
18	34	15	23	15	20	24	28	44	22	16	14	25
19	29	18	23	14	39	23	27	38	20	16	18	22
20	25	17	21	14	90	24	98	34	17	15	16	26

21	24	16	19	15	61	22	64	25	17	16	15	18
22	23	15	20	15	38	21	46	25	17	15	256	20
23	102	15	24	17	30	20	36	24	17	15	178	17
24	79	19	19	17	27	19	50	27	18	14	79	16
25	78	31	17	16	25	22	45	31	18	14	34	15

26	42	22	17	15	22	22	30	23	19	16	25	14
27	32	22	17	15	23	22	63	21	18	21	21	14
28	28	19	17	16	21	18	83	21	17	16	18	14
29	28	24	16	16	---	44	45	21	16	18	18	16
30	22	47	15	17	---	33	34	20	16	17	15	15

31	23	---	16	22	---	26	---	20	---	16	15	---

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	18	22	27	15	28	20	27	28	18	16	16	14
2	17	22	21	15	22	26	60	41	17	16	16	24
3	16	20	19	15	20	29	38	28	19	16	14	19
4	34	19	18	15	19	25	31	26	90	16	19	16
5	133	19	18	15	16	23	28	24	53	16	51	15

6	39	19	17	15	18	34	26	33	34	15	20	16
7	26	18	16	15	18	56	42	26	23	15	17	15
8	24	19	15	14	21	155	138	30	18	15	16	14
9	21	18	15	14	34	163	189	49	16	95	15	15
10	20	17	15	14	63	84	78	27	36	27	14	15

11	20	17	15	14	41	54	49	184	51	21	14	15
12	63	17	15	14	31	42	40	397	29	18	15	15
13	316	17	27	14	27	35	34	135	26	17	32	15
14	325	21	22	15	24	28	30	72	66	16	25	14
15	113	17	19	14	24	30	29	47	43	17	18	14

16	72	16	18	15	22	27	24	85	26	17	17	13
17	40	16	28	15	20	25	38	70	23	15	16	14
18	34	15	23	15	20	24	28	44	22	16	14	25
19	29	18	23	14	39	23	27	38	20	16	18	22
20	25	17	21	14	90	24	98	34	17	15	16	26

21	24	16	19	15	61	22	64	25	17	16	15	18
22	23	15	20	15	38	21	46	25	17	15	256	20
23	102	15	24	17	30	20	36	24	17	15	178	17
24	79	19	19	17	27	19	50	27	18	14	79	16
25	78	31	17	16	25	22	45	31	18	14	34	15

26	42	22	17	15	22	22	30	23	19	16	25	14
27	32	22	17	15	23	22	63	21	18	21	21	14
28	28	19	17	16	21	18	83	21	17	16	18	14
29	28	24	16	16	---	44	45	21	16	18	18	16
30	22	47	15	17	---	33	34	20	16	17	15	15

31	23	---	16	22	---	26	---	20	---	16	15	---