05580950 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 40°28'16", long 89°01'48" (NAD of 1927), in NE1/4NW1/4 sec.7, T.23 N., R.2 E., McLean County, Hydrologic Unit 07130009, on left bank at Bloomington-Normal Sanitary District sewage-treatment plant, 250 ft upstream from bridge on Interstate 74, 0.4 mi west of Bloomington, and at mile 48.8.

DRAINAGE AREA.-- 34.4 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1974 to current year.
	STAGE: Water years 1994-2002.

REVISED RECORDS.-- WDR IL-82-2: Drainage area. WDR IL-87-2: 1985.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 725.11 ft above NGVD of 1929. Prior to Nov. 4, 1987, 200 ft upstream at same datum.

REMARKS.-- Sewage-treatment plant effluent 300 ft upstream contains publicly supplied water from Lake Bloomington and Lake Evergreen and ground-water sources.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,600 ft³/s, Dec. 3, 1982, gage height, 14.02 ft, from floodmark; minimum daily, 9.0 ft³/s, Dec. 25, 1976.

REMARKS FOR CURRENT YEAR.-- Records poor. Effluent from sewage-treatment plant upstream averaged 36.7 ft³/s and contains publicly supplied water from Lake Bloomington and Lake Evergreen and ground-water sources. The maximum monthly effluent was 46.9 ft³/s in March and the minimum was 29.1 ft³/s in January.

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	14	21	50	22	142	53	50	110	42	27	28	30
2	12	93	37	22	96	129	53	100	40	26	29	31
3	13	26	35	22	78	105	46	79	39	25	19	31
4	19	21	34	23	64	80	44	72	50	22	17	27
5	126	19	34	23	58	89	42	68	50	21	18	27

6	23	48	36	25	54	121	40	80	41	20	15	25
7	14	63	31	23	50	123	46	68	34	19	14	22
8	14	61	29	24	46	132	122	70	29	21	13	21
9	13	57	27	24	44	261	79	145	28	28	14	29
10	35	53	27	24	65	128	64	72	31	21	16	24

11	63	50	27	24	50	100	59	393	90	25	16	22
12	118	50	52	23	47	88	57	560	55	20	17	21
13	250	51	67	23	43	79	53	185	407	17	55	19
14	89	51	58	24	42	70	52	133	112	16	50	18
15	115	49	46	23	41	67	50	107	75	19	20	45

16	103	47	76	23	41	57	48	137	61	19	308	23
17	41	46	92	24	38	57	46	141	57	18	70	25
18	28	43	60	24	38	54	46	114	47	21	36	71
19	23	49	49	24	185	51	47	93	42	24	314	50
20	20	45	42	24	173	51	56	81	40	19	83	87

21	60	44	39	26	108	47	147	73	39	19	51	37
22	131	36	66	25	85	43	69	68	36	28	38	27
23	117	36	54	26	72	43	60	78	35	22	656	23
24	79	159	41	26	64	42	74	90	36	20	130	21
25	46	73	35	25	68	48	59	62	43	18	86	20

26	33	63	34	25	77	48	50	53	45	65	68	21
27	27	52	32	24	60	47	348	50	41	134	57	22
28	24	29	30	24	56	47	157	64	33	159	47	19
29	22	48	27	38	---	93	98	59	30	155	43	18
30	21	147	24	153	---	61	81	48	28	64	38	20

31	20	---	24	417	---	51	---	44	---	37	32	---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1975 - 2002, BY WATER YEAR (WY)
MEAN	36.23	45.54	51.21	40.61	59.06	80.08	70.93	76.31	55.69	42.41	44.49	40.40
MAX	152	203	201	130	148	238	146	181	118	125	138	178
(WY)	1987	1986	1983	1993	1976	1979	1979	1984	1993	1993	1981	1993
MIN	17.1	17.5	14.0	15.5	22.5	29.6	28.1	28.0	21.1	17.2	16.5	17.0
(WY)	1975	1977	1977	1977	1980	1981	1977	1987	1988	1994	1988	1998

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1975 - 2002
ANNUAL TOTAL	20715.5		22284
ANNUAL MEAN	56.75		61.05		53.54
HIGHEST ANNUAL MEAN					99.6	1993
LOWEST ANNUAL MEAN					31.7	2000
HIGHEST DAILY MEAN	514	Jan 29	656	Aug 23	2500	Mar 4 1979
LOWEST DAILY MEAN	9.3	Jan 25,Aug 5	12	Oct 2	9.0	Dec 25 1976
ANNUAL SEVEN-DAY MINIMUM	11	Jul 31	15	Aug 6	11	Jul 31 2001
MAXIMUM PEAK FLOW			2130	Aug 23	6600	Dec 3 1982
MAXIMUM PEAK STAGE			8.59	Aug 23	14.02 A	Dec 3 1982
INSTANTANEOUS LOW FLOW			3.3	Jul 14
10 PERCENT EXCEEDS	117		117		97
50 PERCENT EXCEEDS	37		45		31
90 PERCENT EXCEEDS	14		20		18

A-From flood mark.

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	14	21	50	22	142	53	50	110	42	27	28	30
2	12	93	37	22	96	129	53	100	40	26	29	31
3	13	26	35	22	78	105	46	79	39	25	19	31
4	19	21	34	23	64	80	44	72	50	22	17	27
5	126	19	34	23	58	89	42	68	50	21	18	27

6	23	48	36	25	54	121	40	80	41	20	15	25
7	14	63	31	23	50	123	46	68	34	19	14	22
8	14	61	29	24	46	132	122	70	29	21	13	21
9	13	57	27	24	44	261	79	145	28	28	14	29
10	35	53	27	24	65	128	64	72	31	21	16	24

11	63	50	27	24	50	100	59	393	90	25	16	22
12	118	50	52	23	47	88	57	560	55	20	17	21
13	250	51	67	23	43	79	53	185	407	17	55	19
14	89	51	58	24	42	70	52	133	112	16	50	18
15	115	49	46	23	41	67	50	107	75	19	20	45

16	103	47	76	23	41	57	48	137	61	19	308	23
17	41	46	92	24	38	57	46	141	57	18	70	25
18	28	43	60	24	38	54	46	114	47	21	36	71
19	23	49	49	24	185	51	47	93	42	24	314	50
20	20	45	42	24	173	51	56	81	40	19	83	87

21	60	44	39	26	108	47	147	73	39	19	51	37
22	131	36	66	25	85	43	69	68	36	28	38	27
23	117	36	54	26	72	43	60	78	35	22	656	23
24	79	159	41	26	64	42	74	90	36	20	130	21
25	46	73	35	25	68	48	59	62	43	18	86	20

26	33	63	34	25	77	48	50	53	45	65	68	21
27	27	52	32	24	60	47	348	50	41	134	57	22
28	24	29	30	24	56	47	157	64	33	159	47	19
29	22	48	27	38	---	93	98	59	30	155	43	18
30	21	147	24	153	---	61	81	48	28	64	38	20

31	20	---	24	417	---	51	---	44	---	37	32	---

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	14	21	50	22	142	53	50	110	42	27	28	30
2	12	93	37	22	96	129	53	100	40	26	29	31
3	13	26	35	22	78	105	46	79	39	25	19	31
4	19	21	34	23	64	80	44	72	50	22	17	27
5	126	19	34	23	58	89	42	68	50	21	18	27

6	23	48	36	25	54	121	40	80	41	20	15	25
7	14	63	31	23	50	123	46	68	34	19	14	22
8	14	61	29	24	46	132	122	70	29	21	13	21
9	13	57	27	24	44	261	79	145	28	28	14	29
10	35	53	27	24	65	128	64	72	31	21	16	24

11	63	50	27	24	50	100	59	393	90	25	16	22
12	118	50	52	23	47	88	57	560	55	20	17	21
13	250	51	67	23	43	79	53	185	407	17	55	19
14	89	51	58	24	42	70	52	133	112	16	50	18
15	115	49	46	23	41	67	50	107	75	19	20	45

16	103	47	76	23	41	57	48	137	61	19	308	23
17	41	46	92	24	38	57	46	141	57	18	70	25
18	28	43	60	24	38	54	46	114	47	21	36	71
19	23	49	49	24	185	51	47	93	42	24	314	50
20	20	45	42	24	173	51	56	81	40	19	83	87

21	60	44	39	26	108	47	147	73	39	19	51	37
22	131	36	66	25	85	43	69	68	36	28	38	27
23	117	36	54	26	72	43	60	78	35	22	656	23
24	79	159	41	26	64	42	74	90	36	20	130	21
25	46	73	35	25	68	48	59	62	43	18	86	20

26	33	63	34	25	77	48	50	53	45	65	68	21
27	27	52	32	24	60	47	348	50	41	134	57	22
28	24	29	30	24	56	47	157	64	33	159	47	19
29	22	48	27	38	---	93	98	59	30	155	43	18
30	21	147	24	153	---	61	81	48	28	64	38	20

31	20	---	24	417	---	51	---	44	---	37	32	---

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	14	21	50	22	142	53	50	110	42	27	28	30
2	12	93	37	22	96	129	53	100	40	26	29	31
3	13	26	35	22	78	105	46	79	39	25	19	31
4	19	21	34	23	64	80	44	72	50	22	17	27
5	126	19	34	23	58	89	42	68	50	21	18	27

6	23	48	36	25	54	121	40	80	41	20	15	25
7	14	63	31	23	50	123	46	68	34	19	14	22
8	14	61	29	24	46	132	122	70	29	21	13	21
9	13	57	27	24	44	261	79	145	28	28	14	29
10	35	53	27	24	65	128	64	72	31	21	16	24

11	63	50	27	24	50	100	59	393	90	25	16	22
12	118	50	52	23	47	88	57	560	55	20	17	21
13	250	51	67	23	43	79	53	185	407	17	55	19
14	89	51	58	24	42	70	52	133	112	16	50	18
15	115	49	46	23	41	67	50	107	75	19	20	45

16	103	47	76	23	41	57	48	137	61	19	308	23
17	41	46	92	24	38	57	46	141	57	18	70	25
18	28	43	60	24	38	54	46	114	47	21	36	71
19	23	49	49	24	185	51	47	93	42	24	314	50
20	20	45	42	24	173	51	56	81	40	19	83	87

21	60	44	39	26	108	47	147	73	39	19	51	37
22	131	36	66	25	85	43	69	68	36	28	38	27
23	117	36	54	26	72	43	60	78	35	22	656	23
24	79	159	41	26	64	42	74	90	36	20	130	21
25	46	73	35	25	68	48	59	62	43	18	86	20

26	33	63	34	25	77	48	50	53	45	65	68	21
27	27	52	32	24	60	47	348	50	41	134	57	22
28	24	29	30	24	56	47	157	64	33	159	47	19
29	22	48	27	38	---	93	98	59	30	155	43	18
30	21	147	24	153	---	61	81	48	28	64	38	20

31	20	---	24	417	---	51	---	44	---	37	32	---