05536215 DATA: Discharge Tables, 2001

ILLINOIS RIVER BASIN

05536215 THORN CREEK AT GLENWOOD, IL

LOCATION.-- Lat 41°31'49", long 87°37'20", in SW1/4SE1/4 sec.9, T.35 N., R.14 E., Cook County, Hydrologic Unit 07120003, on right bank 20 ft downstream from abandoned Baltimore and Ohio Chicago Terminal Railroad bridge, 0.7 mi north of Chicago Heights, 0.8 mi south of Glenwood, 1.0 mi upstream from Deer Creek, and at mile 9.2.

DRAINAGE AREA.-- 24.7 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: May 1949 to current year. Prior to October 1974, records published with those for streams in the St. Lawrence River basin (WSP 1307, 1727, 1911, 2111, WDR IL 1971-74).

STAGE: Water years 1994-2001.

REVISED RECORDS.-- WSP 1437: 1955. WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder. Datum of gage is 610.97 ft above sea level.

REMARKS.-- Effluent from sewage-treatment plant 1 mi upstream consists of publicly supplied water from Lake Michigan and ground-water sources.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,700 ft³/s (estimated), July 18, 1996, gage height unknown; maximum recorded gage height, 11.26 ft, Aug. 17, 1968, may have been higher during period of no gage-height record, July 17-20, 1996; minimum daily, 6.0 ft³/s, July 4, Aug. 21, Sept. 5, 11, 25, 1949.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of Apr. 1947, reached a stage of 12.94 ft, from floodmarks, discharge not determined.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. Effluent from sewage-treatment plant upstream averaged 22.6 ft³/s during the year. The maximum monthly average was 38.1 ft³/s in February and the minimum was 17.7 ft³/s in September.

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	20	20	31	24	77	53	29	31	44	25	26	e24
2	20	19	30	23	57	48	27	30	45	23	199	e25
3	25	18	27	23	48	43	26	29	34	58	74	e24
4	131	18	26	23	42	40	25	29	31	40	45	e23
5	48	18	25	24	39	37	38	29	197	25	36	e21

6	38	26	24	26	52	35	60	29	107	23	32	e29
7	29	51	25	25	43	33	38	29	60	23	29	e33
8	75	23	24	25	115	31	31	28	48	23	30	e24
9	45	171	23	24	535	30	33	28	41	23	33	e29
10	33	85	23	24	296	30	30	32	35	22	32	e28

11	28	50	24	23	113	33	36	39	33	21	23	e26
12	26	38	21	23	78	38	42	30	61	21	26	e24
13	26	74	21	27	66	36	30	28	37	21	26	e23
14	25	46	23	56	87	32	28	30	33	20	24	e23
15	26	38	22	86	83	53	91	29	32	20	24	e23

16	25	33	28	66	68	79	56	35	30	19	42	e25
17	23	29	28	52	55	93	41	30	29	21	26	e18
18	23	28	24	45	47	86	36	29	26	22	71	e40
19	22	27	23	39	44	75	35	29	28	21	37	e53
20	23	25	23	35	40	61	50	29	27	22	29	e19

21	23	24	23	32	37	52	74	48	44	131	27	e26
22	22	23	22	29	35	45	66	32	31	101	26	e28
23	21	24	23	28	33	40	62	35	29	176	27	e36
24	46	24	22	28	268	37	49	43	28	68	e32	e29
25	26	33	20	24	373	34	42	32	27	45	e58	e33

26	24	45	21	25	133	33	38	111	27	35	e42	e28
27	23	32	21	25	82	30	36	129	25	31	e29	e24
28	23	28	21	23	63	30	34	62	25	30	e27	e23
29	21	40	21	74	---	28	32	43	26	28	e23	e22
30	21	31	22	154	---	28	32	37	26	29	e27	e22

31	21	---	23	106	---	29	---	46	---	26	e30	---

TOTAL	982	1141	734	1241	3009	1352	1247	1220	1266	1193	1212	805
MEAN	31.7	38.0	23.7	40.0	107	43.6	41.6	39.4	42.2	38.5	39.1	26.8
MAX	131	171	31	154	535	93	91	129	197	176	199	53
MIN	20	18	20	23	33	28	25	28	25	19	23	18

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2001, BY WATER YEAR (WY)
MEAN	26.9	34.0	38.1	36.6	42.7	58.0	61.0	48.7	45.2	33.8	29.3	28.1
MAX	87.1	108	172	97.7	136	188	120	153	138	147	85.2	108
(WY)	1955	1991	1983	1993	1997	1979	1999	1996	1993	1996	1968	1961
MIN	11.0	9.31	11.4	12.0	19.3	20.8	19.3	18.2	12.4	14.0	11.8	9.28
(WY)	1950	1950	1954	1954	1964	1981	1971	1954	1949	1952	1949	1949

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1949 - 2001
ANNUAL TOTAL	15383		15402
ANNUAL MEAN	42.0		42.2		40.3
HIGHEST ANNUAL MEAN					67.9	1993
LOWEST ANNUAL MEAN					24.8	1954
HIGHEST DAILY MEAN	427	Jun 25	535	Feb 9	1500	A
LOWEST DAILY MEAN	18	Nov 3-5	18	B	6.0	C
ANNUAL SEVEN-DAY MINIMUM	19	Oct 30	19	Oct 30	8.5	Sep 5 1949
MAXIMUM PEAK FLOW			692	Feb 24	2700 D	Jul 18 1996
MAXIMUM PEAK STAGE			8.68	Feb 24	11.26 E	Aug 17 1968
INSTANTANEOUS LOW FLOW			9.4	Nov 3	.00 F	Jun 3 1992
10 PERCENT EXCEEDS	74		72		68
50 PERCENT EXCEEDS	27		29		24
90 PERCENT EXCEEDS	21		22		16

	A - Aug. 17, 1968; July 18, 1996 (estimated).
	B - Nov. 3-5, Sept 17 (estimated).
	C - July 4, Aug. 21, Sept. 5, 11, 25, 1949.
	D - Estimated, gage height unknown.
	E - May have been higher during period of no gage-height record, July 17-20, 1996.
	F - No effluent from sewage-treatment plant because of temporary equipment repair.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data

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	20	20	31	24	77	53	29	31	44	25	26	e24
2	20	19	30	23	57	48	27	30	45	23	199	e25
3	25	18	27	23	48	43	26	29	34	58	74	e24
4	131	18	26	23	42	40	25	29	31	40	45	e23
5	48	18	25	24	39	37	38	29	197	25	36	e21

6	38	26	24	26	52	35	60	29	107	23	32	e29
7	29	51	25	25	43	33	38	29	60	23	29	e33
8	75	23	24	25	115	31	31	28	48	23	30	e24
9	45	171	23	24	535	30	33	28	41	23	33	e29
10	33	85	23	24	296	30	30	32	35	22	32	e28

11	28	50	24	23	113	33	36	39	33	21	23	e26
12	26	38	21	23	78	38	42	30	61	21	26	e24
13	26	74	21	27	66	36	30	28	37	21	26	e23
14	25	46	23	56	87	32	28	30	33	20	24	e23
15	26	38	22	86	83	53	91	29	32	20	24	e23

16	25	33	28	66	68	79	56	35	30	19	42	e25
17	23	29	28	52	55	93	41	30	29	21	26	e18
18	23	28	24	45	47	86	36	29	26	22	71	e40
19	22	27	23	39	44	75	35	29	28	21	37	e53
20	23	25	23	35	40	61	50	29	27	22	29	e19

21	23	24	23	32	37	52	74	48	44	131	27	e26
22	22	23	22	29	35	45	66	32	31	101	26	e28
23	21	24	23	28	33	40	62	35	29	176	27	e36
24	46	24	22	28	268	37	49	43	28	68	e32	e29
25	26	33	20	24	373	34	42	32	27	45	e58	e33

26	24	45	21	25	133	33	38	111	27	35	e42	e28
27	23	32	21	25	82	30	36	129	25	31	e29	e24
28	23	28	21	23	63	30	34	62	25	30	e27	e23
29	21	40	21	74	---	28	32	43	26	28	e23	e22
30	21	31	22	154	---	28	32	37	26	29	e27	e22

31	21	---	23	106	---	29	---	46	---	26	e30	---

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	20	20	31	24	77	53	29	31	44	25	26	e24
2	20	19	30	23	57	48	27	30	45	23	199	e25
3	25	18	27	23	48	43	26	29	34	58	74	e24
4	131	18	26	23	42	40	25	29	31	40	45	e23
5	48	18	25	24	39	37	38	29	197	25	36	e21

6	38	26	24	26	52	35	60	29	107	23	32	e29
7	29	51	25	25	43	33	38	29	60	23	29	e33
8	75	23	24	25	115	31	31	28	48	23	30	e24
9	45	171	23	24	535	30	33	28	41	23	33	e29
10	33	85	23	24	296	30	30	32	35	22	32	e28

11	28	50	24	23	113	33	36	39	33	21	23	e26
12	26	38	21	23	78	38	42	30	61	21	26	e24
13	26	74	21	27	66	36	30	28	37	21	26	e23
14	25	46	23	56	87	32	28	30	33	20	24	e23
15	26	38	22	86	83	53	91	29	32	20	24	e23

16	25	33	28	66	68	79	56	35	30	19	42	e25
17	23	29	28	52	55	93	41	30	29	21	26	e18
18	23	28	24	45	47	86	36	29	26	22	71	e40
19	22	27	23	39	44	75	35	29	28	21	37	e53
20	23	25	23	35	40	61	50	29	27	22	29	e19

21	23	24	23	32	37	52	74	48	44	131	27	e26
22	22	23	22	29	35	45	66	32	31	101	26	e28
23	21	24	23	28	33	40	62	35	29	176	27	e36
24	46	24	22	28	268	37	49	43	28	68	e32	e29
25	26	33	20	24	373	34	42	32	27	45	e58	e33

26	24	45	21	25	133	33	38	111	27	35	e42	e28
27	23	32	21	25	82	30	36	129	25	31	e29	e24
28	23	28	21	23	63	30	34	62	25	30	e27	e23
29	21	40	21	74	---	28	32	43	26	28	e23	e22
30	21	31	22	154	---	28	32	37	26	29	e27	e22

31	21	---	23	106	---	29	---	46	---	26	e30	---

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	20	20	31	24	77	53	29	31	44	25	26	e24
2	20	19	30	23	57	48	27	30	45	23	199	e25
3	25	18	27	23	48	43	26	29	34	58	74	e24
4	131	18	26	23	42	40	25	29	31	40	45	e23
5	48	18	25	24	39	37	38	29	197	25	36	e21

6	38	26	24	26	52	35	60	29	107	23	32	e29
7	29	51	25	25	43	33	38	29	60	23	29	e33
8	75	23	24	25	115	31	31	28	48	23	30	e24
9	45	171	23	24	535	30	33	28	41	23	33	e29
10	33	85	23	24	296	30	30	32	35	22	32	e28

11	28	50	24	23	113	33	36	39	33	21	23	e26
12	26	38	21	23	78	38	42	30	61	21	26	e24
13	26	74	21	27	66	36	30	28	37	21	26	e23
14	25	46	23	56	87	32	28	30	33	20	24	e23
15	26	38	22	86	83	53	91	29	32	20	24	e23

16	25	33	28	66	68	79	56	35	30	19	42	e25
17	23	29	28	52	55	93	41	30	29	21	26	e18
18	23	28	24	45	47	86	36	29	26	22	71	e40
19	22	27	23	39	44	75	35	29	28	21	37	e53
20	23	25	23	35	40	61	50	29	27	22	29	e19

21	23	24	23	32	37	52	74	48	44	131	27	e26
22	22	23	22	29	35	45	66	32	31	101	26	e28
23	21	24	23	28	33	40	62	35	29	176	27	e36
24	46	24	22	28	268	37	49	43	28	68	e32	e29
25	26	33	20	24	373	34	42	32	27	45	e58	e33

26	24	45	21	25	133	33	38	111	27	35	e42	e28
27	23	32	21	25	82	30	36	129	25	31	e29	e24
28	23	28	21	23	63	30	34	62	25	30	e27	e23
29	21	40	21	74	---	28	32	43	26	28	e23	e22
30	21	31	22	154	---	28	32	37	26	29	e27	e22

31	21	---	23	106	---	29	---	46	---	26	e30	---