05533000 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN

05533000 FLAG CREEK NEAR WILLOW SPRINGS, IL


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 to current year.
SURFACE-WATER QUALITY
	MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.
BIOLOGICAL
	ALGAE: Pigment and biomass, Water year 2000.
	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 except those greater than 100 ft³/s, which are fair. Effluent from sewage-treatment plant 2 mi. upstream averaged 18.0 ft³/s during the year. The maximum monthly average was 25 ft³/s in March, and the minimum was 13.4 ft³/s in September.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	13	11	16	14	12	35	32	22	82	15	13	22
2	12	36	15	14	13	33	28	19	60	15	13	18
3	17	141	16	16	13	26	25	19	39	31	17	16
4	14	130	19	14	13	69	22	18	27	32	63	16
5	12	252	63	18	13	296	22	17	24	20	20	14

6	11	61	37	15	14	92	18	17	21	38	17	14
7	12	34	27	14	14	51	19	18	20	31	15	14
8	12	26	23	14	13	38	19	17	19	21	14	13
9	12	21	36	13	14	32	18	17	18	25	13	13
10	11	19	154	13	13	28	18	18	78	51	12	8.3

11	12	20	71	13	13	26	17	16	144	23	14	13
12	12	19	39	16	14	22	17	25	201	21	11	12
13	11	17	31	16	14	20	17	47	63	18	13	14
14	55	17	26	15	13	27	18	112	47	17	12	10
15	22	17	24	15	13	20	17	45	33	15	12	14

16	16	18	23	14	13	21	17	28	26	15	13	20
17	15	17	20	15	13	22	20	24	23	14	14	14
18	13	225	20	15	14	26	16	33	20	13	15	12
19	12	172	19	13	16	25	16	23	20	14	15	12
20	13	43	17	13	51	29	33	20	18	14	13	13

21	13	28	16	12	41	23	37	25	35	19	12	13
22	13	22	17	12	32	22	22	59	27	21	12	13
23	13	60	17	12	39	19	20	49	20	16	12	13
24	14	79	16	12	35	35	19	27	21	14	40	12
25	36	37	15	12	31	28	51	29	19	13	34	12

26	16	30	14	12	27	62	26	22	16	13	35	11
27	15	e26	14	12	25	42	21	20	15	13	47	12
28	15	e20	20	12	23	88	21	18	17	13	338	13
29	14	e18	18	13	22	131	18	16	15	13	89	13
30	14	e16	16	13	---	57	23	175	15	15	41	13

31	12	---	15	12	---	39	---	190	---	13	27	---

TOTAL	482	1632	874	424	581	1484	667	1185	1183	606	1016	407.3
MEAN	15.5	54.4	28.2	13.7	20.0	47.9	22.2	38.2	39.4	19.5	32.8	13.6
MAX	55	252	154	18	51	296	51	190	201	51	338	22
MIN	11	11	14	12	12	19	16	16	15	13	11	8.3

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2004, BY WATER YEAR (WY)
MEAN	16.0	19.9	19.3	18.3	22.3	32.0	35.4	27.9	21.8	18.3	18.0	17.1
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 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1951 - 2004
ANNUAL TOTAL	10088.8		10541.3
ANNUAL MEAN	27.6		28.8		22.2
HIGHEST ANNUAL MEAN					39.6	1983
LOWEST ANNUAL MEAN					7.79	1953
HIGHEST DAILY MEAN	283	May 9	338	Aug 28	1040	Jul 18 1996
LOWEST DAILY MEAN	9.8	Jan 21	8.3	Sep 10	0.10	Dec 9 1957
ANNUAL SEVEN-DAY MINIMUM	12	Oct 5	12	Oct 5	1.0	Feb 3 1959
MAXIMUM PEAK FLOW			790	Aug 28	2680	Sep 14 1961
MAXIMUM PEAK STAGE			7.82	Aug 28	13.71 A	Sep 14 1961
INSTANTANEOUS LOW FLOW			1.7	Sep 10
10 PERCENT EXCEEDS	47		50		41
50 PERCENT EXCEEDS	17		18		14
90 PERCENT EXCEEDS	12		12		4.5

A - Present datum.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	13	11	16	14	12	35	32	22	82	15	13	22
2	12	36	15	14	13	33	28	19	60	15	13	18
3	17	141	16	16	13	26	25	19	39	31	17	16
4	14	130	19	14	13	69	22	18	27	32	63	16
5	12	252	63	18	13	296	22	17	24	20	20	14

6	11	61	37	15	14	92	18	17	21	38	17	14
7	12	34	27	14	14	51	19	18	20	31	15	14
8	12	26	23	14	13	38	19	17	19	21	14	13
9	12	21	36	13	14	32	18	17	18	25	13	13
10	11	19	154	13	13	28	18	18	78	51	12	8.3

11	12	20	71	13	13	26	17	16	144	23	14	13
12	12	19	39	16	14	22	17	25	201	21	11	12
13	11	17	31	16	14	20	17	47	63	18	13	14
14	55	17	26	15	13	27	18	112	47	17	12	10
15	22	17	24	15	13	20	17	45	33	15	12	14

16	16	18	23	14	13	21	17	28	26	15	13	20
17	15	17	20	15	13	22	20	24	23	14	14	14
18	13	225	20	15	14	26	16	33	20	13	15	12
19	12	172	19	13	16	25	16	23	20	14	15	12
20	13	43	17	13	51	29	33	20	18	14	13	13

21	13	28	16	12	41	23	37	25	35	19	12	13
22	13	22	17	12	32	22	22	59	27	21	12	13
23	13	60	17	12	39	19	20	49	20	16	12	13
24	14	79	16	12	35	35	19	27	21	14	40	12
25	36	37	15	12	31	28	51	29	19	13	34	12

26	16	30	14	12	27	62	26	22	16	13	35	11
27	15	e26	14	12	25	42	21	20	15	13	47	12
28	15	e20	20	12	23	88	21	18	17	13	338	13
29	14	e18	18	13	22	131	18	16	15	13	89	13
30	14	e16	16	13	---	57	23	175	15	15	41	13

31	12	---	15	12	---	39	---	190	---	13	27	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	13	11	16	14	12	35	32	22	82	15	13	22
2	12	36	15	14	13	33	28	19	60	15	13	18
3	17	141	16	16	13	26	25	19	39	31	17	16
4	14	130	19	14	13	69	22	18	27	32	63	16
5	12	252	63	18	13	296	22	17	24	20	20	14

6	11	61	37	15	14	92	18	17	21	38	17	14
7	12	34	27	14	14	51	19	18	20	31	15	14
8	12	26	23	14	13	38	19	17	19	21	14	13
9	12	21	36	13	14	32	18	17	18	25	13	13
10	11	19	154	13	13	28	18	18	78	51	12	8.3

11	12	20	71	13	13	26	17	16	144	23	14	13
12	12	19	39	16	14	22	17	25	201	21	11	12
13	11	17	31	16	14	20	17	47	63	18	13	14
14	55	17	26	15	13	27	18	112	47	17	12	10
15	22	17	24	15	13	20	17	45	33	15	12	14

16	16	18	23	14	13	21	17	28	26	15	13	20
17	15	17	20	15	13	22	20	24	23	14	14	14
18	13	225	20	15	14	26	16	33	20	13	15	12
19	12	172	19	13	16	25	16	23	20	14	15	12
20	13	43	17	13	51	29	33	20	18	14	13	13

21	13	28	16	12	41	23	37	25	35	19	12	13
22	13	22	17	12	32	22	22	59	27	21	12	13
23	13	60	17	12	39	19	20	49	20	16	12	13
24	14	79	16	12	35	35	19	27	21	14	40	12
25	36	37	15	12	31	28	51	29	19	13	34	12

26	16	30	14	12	27	62	26	22	16	13	35	11
27	15	e26	14	12	25	42	21	20	15	13	47	12
28	15	e20	20	12	23	88	21	18	17	13	338	13
29	14	e18	18	13	22	131	18	16	15	13	89	13
30	14	e16	16	13	---	57	23	175	15	15	41	13

31	12	---	15	12	---	39	---	190	---	13	27	---

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	13	11	16	14	12	35	32	22	82	15	13	22
2	12	36	15	14	13	33	28	19	60	15	13	18
3	17	141	16	16	13	26	25	19	39	31	17	16
4	14	130	19	14	13	69	22	18	27	32	63	16
5	12	252	63	18	13	296	22	17	24	20	20	14

6	11	61	37	15	14	92	18	17	21	38	17	14
7	12	34	27	14	14	51	19	18	20	31	15	14
8	12	26	23	14	13	38	19	17	19	21	14	13
9	12	21	36	13	14	32	18	17	18	25	13	13
10	11	19	154	13	13	28	18	18	78	51	12	8.3

11	12	20	71	13	13	26	17	16	144	23	14	13
12	12	19	39	16	14	22	17	25	201	21	11	12
13	11	17	31	16	14	20	17	47	63	18	13	14
14	55	17	26	15	13	27	18	112	47	17	12	10
15	22	17	24	15	13	20	17	45	33	15	12	14

16	16	18	23	14	13	21	17	28	26	15	13	20
17	15	17	20	15	13	22	20	24	23	14	14	14
18	13	225	20	15	14	26	16	33	20	13	15	12
19	12	172	19	13	16	25	16	23	20	14	15	12
20	13	43	17	13	51	29	33	20	18	14	13	13

21	13	28	16	12	41	23	37	25	35	19	12	13
22	13	22	17	12	32	22	22	59	27	21	12	13
23	13	60	17	12	39	19	20	49	20	16	12	13
24	14	79	16	12	35	35	19	27	21	14	40	12
25	36	37	15	12	31	28	51	29	19	13	34	12

26	16	30	14	12	27	62	26	22	16	13	35	11
27	15	e26	14	12	25	42	21	20	15	13	47	12
28	15	e20	20	12	23	88	21	18	17	13	338	13
29	14	e18	18	13	22	131	18	16	15	13	89	13
30	14	e16	16	13	---	57	23	175	15	15	41	13

31	12	---	15	12	---	39	---	190	---	13	27	---