05536215 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN

05536215 THORN CREEK AT GLENWOOD, IL


LOCATION.-- Lat 41°31'49", long 87°37'20" (NAD of 1927), 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 1994-2002.

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

GAGE.-- Water-stage recorder. Datum of gage is 610.97 ft above NGVD of 1929.

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 24.0 ft³/s during the year. The maximum monthly average was 36.8 ft³/s in May and the minimum was 15.5 ft³/s in 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	e20	30	54	24	97	33	38	43	30	25	17	15
2	e18	103	45	25	62	56	140	44	28	23	18	27
3	e17	53	40	24	51	60	69	37	28	24	16	19
4	e71	43	36	24	42	48	49	34	28	80	16	18
5	e124	38	36	25	36	44	43	30	28	42	23	17

6	e58	35	38	27	34	71	39	52	27	26	16	17
7	e44	33	33	25	33	109	43	39	27	24	16	18
8	e31	30	31	25	35	237	256	90	25	23	15	17
9	e27	30	30	24	51	281	316	346	25	82	15	18
10	e25	31	29	24	70	124	93	84	29	34	16	20

11	24	28	28	24	60	65	62	288	44	26	15	18
12	149	28	28	24	48	56	53	808	29	24	16	18
13	209	27	37	24	42	50	47	294	28	22	15	17
14	253	35	42	24	38	46	44	94	36	20	16	17
15	88	28	35	25	35	42	40	60	36	20	15	17

16	68	28	35	24	34	40	37	92	28	19	24	17
17	48	27	62	25	32	38	39	71	27	19	17	17
18	41	27	44	24	32	36	35	53	26	21	16	23
19	35	34	41	24	61	35	33	50	23	19	31	29
20	33	28	37	23	142	36	104	45	24	18	19	44

21	32	28	34	24	79	32	77	43	24	18	17	22
22	31	27	36	23	54	30	60	38	25	19	15	20
23	92	25	38	24	45	30	47	36	25	17	19	19
24	117	33	34	23	39	28	59	119	25	17	17	18
25	75	36	31	23	37	30	53	53	26	17	16	17

26	54	29	30	23	47	30	42	42	36	18	16	17
27	44	31	29	21	38	30	90	38	73	28	16	17
28	40	27	28	22	35	42	127	35	30	19	17	17
29	35	38	27	22	---	46	61	34	25	28	15	19
30	31	116	26	33	---	41	49	33	25	20	16	18

31	32	---	25	80	---	35	---	32	---	18	16	---

TOTAL	1966	1106	1099	806	1409	1881	2245	3157	890	810	532	587
MEAN	63.42	36.87	35.45	26.00	50.32	60.68	74.83	101.8	29.67	26.13	17.16	19.57
MAX	253	116	62	80	142	281	316	808	73	82	31	44
MIN	17	25	25	21	32	28	33	30	23	17	15	15

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2002, BY WATER YEAR (WY)
MEAN	27.58	34.07	38.08	36.37	42.82	58.06	61.23	49.69	44.91	33.70	29.05	27.94
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 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1949 - 2002
ANNUAL TOTAL	16716		16488
ANNUAL MEAN	45.80		45.17		40.38
HIGHEST ANNUAL MEAN					67.9	1993
LOWEST ANNUAL MEAN					24.8	1954
HIGHEST DAILY MEAN	535	Feb 9	808	May 12	1500	A
LOWEST DAILY MEAN	17 B	Oct 3	15	C	6.0	D
ANNUAL SEVEN-DAY MINIMUM	20	Jul 11	15	Aug 7	8.5	Sep 5 1949
MAXIMUM PEAK FLOW			1290	May 12	2700 E	Jul 18 1996
MAXIMUM PEAK STAGE			9.97	May 12	11.26 F	Aug 17 1968
INSTANTANEOUS LOW FLOW			6.6	Jan 27	0.00 G	Jun 3 1992
10 PERCENT EXCEEDS	76		76		69
50 PERCENT EXCEEDS	32		31		24
90 PERCENT EXCEEDS	23		17		16

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