05533000 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05533000 FLAG CREEK NEAR WILLOW SPRINGS, IL

LOCATION.-- Lat 41°44'20", long 87°53'47", 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 1994-2001.

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 sea level. 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.

REMARKS.-- Effluent from sewage-treatment plant 2 mi upstream.

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 19.6 ft³/s during the year. The maximum monthly average was 27.5 ft³/s in February, and the minimum was 14.9 ft³/s in December.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	17	16	18	15	45	30	21	23	78	14	17	25
2	18	19	17	16	35	27	20	21	36	14	250	21
3	19	17	16	16	29	25	20	20	27	19	71	20
4	92	16	16	16	26	23	20	19	25	15	39	20
5	34	16	15	16	24	22	24	19	72	14	28	20

6	30	21	14	16	26	21	75	24	52	14	26	30
7	24	64	15	16	25	21	39	29	36	17	24	65
8	24	24	15	17	81	20	29	22	29	14	23	24
9	22	109	14	16	374	20	38	19	24	15	26	40
10	21	63	14	17	131	20	29	22	21	15	43	29

11	20	33	15	17	63	20	42	54	21	15	25	22
12	20	26	15	17	44	27	57	25	36	15	22	20
13	19	40	15	18	37	26	33	20	24	14	31	19
14	18	28	15	36	54	23	27	20	20	13	20	19
15	18	22	15	58	48	48	80	20	20	14	18	18

16	18	20	16	45	38	77	45	21	17	15	43	17
17	18	18	17	34	30	70	34	20	16	16	23	19
18	17	17	16	29	27	58	30	18	19	15	24	20
19	18	16	16	26	26	47	27	17	18	16	23	136
20	18	17	15	23	24	39	45	16	17	16	20	47

21	17	16	15	21	24	33	95	24	21	16	18	87
22	17	16	15	21	23	30	61	19	18	19	22	40
23	18	15	15	20	21	27	49	19	16	23	20	91
24	18	14	14	20	150	25	38	18	15	21	20	75
25	18	15	13	19	174	23	33	51	16	168	98	41

26	18	30	14	19	63	23	30	97	16	40	54	30
27	18	21	14	18	43	22	26	120	15	28	32	27
28	16	19	14	17	35	21	24	55	15	22	27	24
29	15	19	15	39	---	21	22	35	15	20	24	21
30	17	18	14	119	---	20	22	28	14	20	23	18

31	17	---	15	69	---	20	---	31	---	19	46	---

TOTAL	674	785	467	846	1720	929	1135	946	769	696	1180	1085
MEAN	21.7	26.2	15.1	27.3	61.4	30.0	37.8	30.5	25.6	22.5	38.1	36.2
MAX	92	109	18	119	374	77	95	120	78	168	250	136
MIN	15	14	13	15	21	20	20	16	14	13	17	17

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2001, BY WATER YEAR (WY)
MEAN	15.1	19.3	19.2	18.5	22.4	31.8	35.5	26.4	21.4	17.9	17.3	17.2
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 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1951 - 2001
ANNUAL TOTAL	10631		11232
ANNUAL MEAN	29.0		30.8		21.8
HIGHEST ANNUAL MEAN					39.6	1983
LOWEST ANNUAL MEAN					7.79	1953
HIGHEST DAILY MEAN	349	Apr 20	374	Feb 9	1040	Jul 18 1996
LOWEST DAILY MEAN	13	A	13	B	.10	Dec 9 1957
ANNUAL SEVEN-DAY MINIMUM	13	Jan 22	14	Dec 24	1.0	Feb 3 1959
MAXIMUM PEAK FLOW			745	Aug 2	2680	Sep 14 1961
MAXIMUM PEAK STAGE			7.68	Aug 2	13.71 C	Sep 14 1961
INSTANTANEOUS LOW FLOW			6.5	Aug 1
10 PERCENT EXCEEDS	51		54		41
50 PERCENT EXCEEDS	19		21		13
90 PERCENT EXCEEDS	14		15		4.4

	A - Several days.
	B - Dec. 25, July 14.
	C - Present datum.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	17	16	18	15	45	30	21	23	78	14	17	25
2	18	19	17	16	35	27	20	21	36	14	250	21
3	19	17	16	16	29	25	20	20	27	19	71	20
4	92	16	16	16	26	23	20	19	25	15	39	20
5	34	16	15	16	24	22	24	19	72	14	28	20

6	30	21	14	16	26	21	75	24	52	14	26	30
7	24	64	15	16	25	21	39	29	36	17	24	65
8	24	24	15	17	81	20	29	22	29	14	23	24
9	22	109	14	16	374	20	38	19	24	15	26	40
10	21	63	14	17	131	20	29	22	21	15	43	29

11	20	33	15	17	63	20	42	54	21	15	25	22
12	20	26	15	17	44	27	57	25	36	15	22	20
13	19	40	15	18	37	26	33	20	24	14	31	19
14	18	28	15	36	54	23	27	20	20	13	20	19
15	18	22	15	58	48	48	80	20	20	14	18	18

16	18	20	16	45	38	77	45	21	17	15	43	17
17	18	18	17	34	30	70	34	20	16	16	23	19
18	17	17	16	29	27	58	30	18	19	15	24	20
19	18	16	16	26	26	47	27	17	18	16	23	136
20	18	17	15	23	24	39	45	16	17	16	20	47

21	17	16	15	21	24	33	95	24	21	16	18	87
22	17	16	15	21	23	30	61	19	18	19	22	40
23	18	15	15	20	21	27	49	19	16	23	20	91
24	18	14	14	20	150	25	38	18	15	21	20	75
25	18	15	13	19	174	23	33	51	16	168	98	41

26	18	30	14	19	63	23	30	97	16	40	54	30
27	18	21	14	18	43	22	26	120	15	28	32	27
28	16	19	14	17	35	21	24	55	15	22	27	24
29	15	19	15	39	---	21	22	35	15	20	24	21
30	17	18	14	119	---	20	22	28	14	20	23	18

31	17	---	15	69	---	20	---	31	---	19	46	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	17	16	18	15	45	30	21	23	78	14	17	25
2	18	19	17	16	35	27	20	21	36	14	250	21
3	19	17	16	16	29	25	20	20	27	19	71	20
4	92	16	16	16	26	23	20	19	25	15	39	20
5	34	16	15	16	24	22	24	19	72	14	28	20

6	30	21	14	16	26	21	75	24	52	14	26	30
7	24	64	15	16	25	21	39	29	36	17	24	65
8	24	24	15	17	81	20	29	22	29	14	23	24
9	22	109	14	16	374	20	38	19	24	15	26	40
10	21	63	14	17	131	20	29	22	21	15	43	29

11	20	33	15	17	63	20	42	54	21	15	25	22
12	20	26	15	17	44	27	57	25	36	15	22	20
13	19	40	15	18	37	26	33	20	24	14	31	19
14	18	28	15	36	54	23	27	20	20	13	20	19
15	18	22	15	58	48	48	80	20	20	14	18	18

16	18	20	16	45	38	77	45	21	17	15	43	17
17	18	18	17	34	30	70	34	20	16	16	23	19
18	17	17	16	29	27	58	30	18	19	15	24	20
19	18	16	16	26	26	47	27	17	18	16	23	136
20	18	17	15	23	24	39	45	16	17	16	20	47

21	17	16	15	21	24	33	95	24	21	16	18	87
22	17	16	15	21	23	30	61	19	18	19	22	40
23	18	15	15	20	21	27	49	19	16	23	20	91
24	18	14	14	20	150	25	38	18	15	21	20	75
25	18	15	13	19	174	23	33	51	16	168	98	41

26	18	30	14	19	63	23	30	97	16	40	54	30
27	18	21	14	18	43	22	26	120	15	28	32	27
28	16	19	14	17	35	21	24	55	15	22	27	24
29	15	19	15	39	---	21	22	35	15	20	24	21
30	17	18	14	119	---	20	22	28	14	20	23	18

31	17	---	15	69	---	20	---	31	---	19	46	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	17	16	18	15	45	30	21	23	78	14	17	25
2	18	19	17	16	35	27	20	21	36	14	250	21
3	19	17	16	16	29	25	20	20	27	19	71	20
4	92	16	16	16	26	23	20	19	25	15	39	20
5	34	16	15	16	24	22	24	19	72	14	28	20

6	30	21	14	16	26	21	75	24	52	14	26	30
7	24	64	15	16	25	21	39	29	36	17	24	65
8	24	24	15	17	81	20	29	22	29	14	23	24
9	22	109	14	16	374	20	38	19	24	15	26	40
10	21	63	14	17	131	20	29	22	21	15	43	29

11	20	33	15	17	63	20	42	54	21	15	25	22
12	20	26	15	17	44	27	57	25	36	15	22	20
13	19	40	15	18	37	26	33	20	24	14	31	19
14	18	28	15	36	54	23	27	20	20	13	20	19
15	18	22	15	58	48	48	80	20	20	14	18	18

16	18	20	16	45	38	77	45	21	17	15	43	17
17	18	18	17	34	30	70	34	20	16	16	23	19
18	17	17	16	29	27	58	30	18	19	15	24	20
19	18	16	16	26	26	47	27	17	18	16	23	136
20	18	17	15	23	24	39	45	16	17	16	20	47

21	17	16	15	21	24	33	95	24	21	16	18	87
22	17	16	15	21	23	30	61	19	18	19	22	40
23	18	15	15	20	21	27	49	19	16	23	20	91
24	18	14	14	20	150	25	38	18	15	21	20	75
25	18	15	13	19	174	23	33	51	16	168	98	41

26	18	30	14	19	63	23	30	97	16	40	54	30
27	18	21	14	18	43	22	26	120	15	28	32	27
28	16	19	14	17	35	21	24	55	15	22	27	24
29	15	19	15	39	---	21	22	35	15	20	24	21
30	17	18	14	119	---	20	22	28	14	20	23	18

31	17	---	15	69	---	20	---	31	---	19	46	---