05551675 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°44'27", long 88°23'00" (NAD of 1927), in NW1/4SE1/4 sec.25, T.38 N., R.7 E., Kane County, Hydrologic Unit 07120007, on right bank at bridge on Jericho Rd., 1.0 mi west of Montgomery, and at mile 13.0.

DRAINAGE AREA.-- 55.0 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: June 1998 to current year.
	STAGE: Water years 1998-2002.
PRECIPITATION: October 1999 to current year.

GAGE.-- Water-stage recorder, phone telemeter, unheated tipping-bucket rain gage, and crest-stage gage. Datum of gage is 654.00 ft above NGVD of 1929.

REMARKS.-- Collection, computation, and publication of precipitation data do not necessarily conform to standards used by the National Weather Service. Precipitation data could be subject to error for days with freezing and/or thawing of precipitation.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,040 ft³/s, Apr. 23, 1999, gage height, 8.61 ft; minimum, 2.9 ft³/s, Sept. 27, 1999.
PRECIPITATION: Maximum daily total, 2.62 in, October 13, 2001.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum measured, 1,170 ft³/s, Feb. 22, 1997, gage height unknown.

REMARKS FOR CURRENT YEAR.-- Records good except those for Jan. 9 to Aug. 13, which are fair, and estimated daily discharges, which are poor.

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	19	50	47	e21	24	37	42	69	55	26	13	10
2	18	47	42	e21	24	e36	45	65	53	25	12	10
3	17	42	40	e21	23	e31	44	59	64	23	9.9	11
4	17	39	37	e22	e22	e27	41	54	175	22	11	10
5	57	35	34	e22	e20	e28	39	50	450	21	22	9.4

6	51	34	33	e21	18	32	36	50	453	20	18	8.8
7	39	35	31	e21	17	37	39	48	215	19	14	8.9
8	31	33	29	e21	16	84	72	45	147	23	13	8.4
9	27	31	27	e23	17	188	193	51	109	34	11	7.6
10	26	30	26	e24	32	179	166	48	104	56	10	7.4

11	27	28	25	e24	46	130	120	71	91	40	9.4	7.2
12	41	27	25	23	43	104	96	291	78	31	9.1	7.0
13	113	26	47	22	44	89	80	357	71	26	13	7.0
14	368	30	51	22	39	78	70	239	65	24	124	7.3
15	253	34	48	22	37	70	63	177	59	22	83	7.2

16	146	31	42	22	34	62	57	167	53	19	46	6.7
17	103	28	44	24	31	58	53	223	53	19	31	6.5
18	79	27	47	22	28	54	50	179	54	18	24	8.1
19	66	29	66	22	32	50	48	141	47	20	20	9.3
20	58	28	56	20	87	49	72	118	44	18	16	14

21	52	27	45	21	111	46	71	104	41	16	14	13
22	47	25	45	19	85	40	80	92	38	15	48	14
23	133	26	46	21	67	40	69	85	37	14	98	14
24	179	29	42	23	58	40	64	80	35	13	64	13
25	217	41	e38	22	53	36	63	78	33	12	43	11

26	139	41	e34	21	47	36	57	74	34	12	31	10
27	97	38	e31	20	43	35	59	69	32	13	24	9.9
28	77	34	e29	22	40	34	101	64	30	16	20	9.6
29	67	32	e26	21	---	40	90	65	28	20	17	8.4
30	61	41	e24	21	---	49	77	61	28	18	14	8.1

31	56	---	e22	27	---	44	---	58	---	15	12	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2002, BY WATER YEAR (WY)
MEAN	51.19	36.97	28.89	40.84	70.75	54.05	81.47	63.57	67.00	40.59	22.96	16.69
MAX	86.5	53.2	38.1	106	137	72.5	156	107	92.5	90.8	35.4	26.8
(WY)	2002	2001	1999	1999	2001	2001	1999	2002	2002	1998	2000	2001
MIN	16.6	11.5	19.4	15.2	30.3	23.9	46.6	27.6	46.1	10.6	5.80	9.43
(WY)	2000	2000	2001	2000	2000	2000	2000	2001	2001	2001	2001	2002

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1998 - 2002
ANNUAL TOTAL	16639.9		18649.2
ANNUAL MEAN	45.59		51.09
HIGHEST ANNUAL MEAN					64.6	1999
LOWEST ANNUAL MEAN					30.3	2000
HIGHEST DAILY MEAN	500 A	Feb 10	453	Jun 6	760	Apr 24 1999
LOWEST DAILY MEAN	3.4	Aug 14	6.5	Sep 17	3.4	Aug 14 2001
ANNUAL SEVEN-DAY MINIMUM	4.0	Aug 9	7.0	Sep 11	4.0	Aug 9 2001
MAXIMUM PEAK FLOW			608	Jun 6	1040	Apr 23 1999
MAXIMUM PEAK STAGE			7.63	Jun 6	8.61	Apr 23 1999
INSTANTANEOUS LOW FLOW			6.1	Sep 13,17		2.9 Sep 27 1999
ANNUAL RUNOFF (CFSM)	0.83		0.93
ANNUAL RUNOFF (INCHES)	11.26		12.62
10 PERCENT EXCEEDS	84		99
50 PERCENT EXCEEDS	31		35
90 PERCENT EXCEEDS	7.2		13

A - Estimated due to backwater from ice.

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	19	50	47	e21	24	37	42	69	55	26	13	10
2	18	47	42	e21	24	e36	45	65	53	25	12	10
3	17	42	40	e21	23	e31	44	59	64	23	9.9	11
4	17	39	37	e22	e22	e27	41	54	175	22	11	10
5	57	35	34	e22	e20	e28	39	50	450	21	22	9.4

6	51	34	33	e21	18	32	36	50	453	20	18	8.8
7	39	35	31	e21	17	37	39	48	215	19	14	8.9
8	31	33	29	e21	16	84	72	45	147	23	13	8.4
9	27	31	27	e23	17	188	193	51	109	34	11	7.6
10	26	30	26	e24	32	179	166	48	104	56	10	7.4

11	27	28	25	e24	46	130	120	71	91	40	9.4	7.2
12	41	27	25	23	43	104	96	291	78	31	9.1	7.0
13	113	26	47	22	44	89	80	357	71	26	13	7.0
14	368	30	51	22	39	78	70	239	65	24	124	7.3
15	253	34	48	22	37	70	63	177	59	22	83	7.2

16	146	31	42	22	34	62	57	167	53	19	46	6.7
17	103	28	44	24	31	58	53	223	53	19	31	6.5
18	79	27	47	22	28	54	50	179	54	18	24	8.1
19	66	29	66	22	32	50	48	141	47	20	20	9.3
20	58	28	56	20	87	49	72	118	44	18	16	14

21	52	27	45	21	111	46	71	104	41	16	14	13
22	47	25	45	19	85	40	80	92	38	15	48	14
23	133	26	46	21	67	40	69	85	37	14	98	14
24	179	29	42	23	58	40	64	80	35	13	64	13
25	217	41	e38	22	53	36	63	78	33	12	43	11

26	139	41	e34	21	47	36	57	74	34	12	31	10
27	97	38	e31	20	43	35	59	69	32	13	24	9.9
28	77	34	e29	22	40	34	101	64	30	16	20	9.6
29	67	32	e26	21	---	40	90	65	28	20	17	8.4
30	61	41	e24	21	---	49	77	61	28	18	14	8.1

31	56	---	e22	27	---	44	---	58	---	15	12	---

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	19	50	47	e21	24	37	42	69	55	26	13	10
2	18	47	42	e21	24	e36	45	65	53	25	12	10
3	17	42	40	e21	23	e31	44	59	64	23	9.9	11
4	17	39	37	e22	e22	e27	41	54	175	22	11	10
5	57	35	34	e22	e20	e28	39	50	450	21	22	9.4

6	51	34	33	e21	18	32	36	50	453	20	18	8.8
7	39	35	31	e21	17	37	39	48	215	19	14	8.9
8	31	33	29	e21	16	84	72	45	147	23	13	8.4
9	27	31	27	e23	17	188	193	51	109	34	11	7.6
10	26	30	26	e24	32	179	166	48	104	56	10	7.4

11	27	28	25	e24	46	130	120	71	91	40	9.4	7.2
12	41	27	25	23	43	104	96	291	78	31	9.1	7.0
13	113	26	47	22	44	89	80	357	71	26	13	7.0
14	368	30	51	22	39	78	70	239	65	24	124	7.3
15	253	34	48	22	37	70	63	177	59	22	83	7.2

16	146	31	42	22	34	62	57	167	53	19	46	6.7
17	103	28	44	24	31	58	53	223	53	19	31	6.5
18	79	27	47	22	28	54	50	179	54	18	24	8.1
19	66	29	66	22	32	50	48	141	47	20	20	9.3
20	58	28	56	20	87	49	72	118	44	18	16	14

21	52	27	45	21	111	46	71	104	41	16	14	13
22	47	25	45	19	85	40	80	92	38	15	48	14
23	133	26	46	21	67	40	69	85	37	14	98	14
24	179	29	42	23	58	40	64	80	35	13	64	13
25	217	41	e38	22	53	36	63	78	33	12	43	11

26	139	41	e34	21	47	36	57	74	34	12	31	10
27	97	38	e31	20	43	35	59	69	32	13	24	9.9
28	77	34	e29	22	40	34	101	64	30	16	20	9.6
29	67	32	e26	21	---	40	90	65	28	20	17	8.4
30	61	41	e24	21	---	49	77	61	28	18	14	8.1

31	56	---	e22	27	---	44	---	58	---	15	12	---

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	19	50	47	e21	24	37	42	69	55	26	13	10
2	18	47	42	e21	24	e36	45	65	53	25	12	10
3	17	42	40	e21	23	e31	44	59	64	23	9.9	11
4	17	39	37	e22	e22	e27	41	54	175	22	11	10
5	57	35	34	e22	e20	e28	39	50	450	21	22	9.4

6	51	34	33	e21	18	32	36	50	453	20	18	8.8
7	39	35	31	e21	17	37	39	48	215	19	14	8.9
8	31	33	29	e21	16	84	72	45	147	23	13	8.4
9	27	31	27	e23	17	188	193	51	109	34	11	7.6
10	26	30	26	e24	32	179	166	48	104	56	10	7.4

11	27	28	25	e24	46	130	120	71	91	40	9.4	7.2
12	41	27	25	23	43	104	96	291	78	31	9.1	7.0
13	113	26	47	22	44	89	80	357	71	26	13	7.0
14	368	30	51	22	39	78	70	239	65	24	124	7.3
15	253	34	48	22	37	70	63	177	59	22	83	7.2

16	146	31	42	22	34	62	57	167	53	19	46	6.7
17	103	28	44	24	31	58	53	223	53	19	31	6.5
18	79	27	47	22	28	54	50	179	54	18	24	8.1
19	66	29	66	22	32	50	48	141	47	20	20	9.3
20	58	28	56	20	87	49	72	118	44	18	16	14

21	52	27	45	21	111	46	71	104	41	16	14	13
22	47	25	45	19	85	40	80	92	38	15	48	14
23	133	26	46	21	67	40	69	85	37	14	98	14
24	179	29	42	23	58	40	64	80	35	13	64	13
25	217	41	e38	22	53	36	63	78	33	12	43	11

26	139	41	e34	21	47	36	57	74	34	12	31	10
27	97	38	e31	20	43	35	59	69	32	13	24	9.9
28	77	34	e29	22	40	34	101	64	30	16	20	9.6
29	67	32	e26	21	---	40	90	65	28	20	17	8.4
30	61	41	e24	21	---	49	77	61	28	18	14	8.1

31	56	---	e22	27	---	44	---	58	---	15	12	---