05551200 DATA: Discharge Tables, 2002

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 41°55'58", long 88°20'28" (NAD of 1927), in NE1/4SE1/4 sec.20, T.40 N., R.8 E., Kane County, Hydrologic Unit 07120007, on right bank at downstream side of bridge on Randall Road, 2.4 mi northwest of St. Charles, and at mile 2.2.

DRAINAGE AREA.-- 51.7 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: December 1960 to current year.
	STAGE: Water years 1994-2002.
SURFACE-WATER QUALITY
	MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.
PRECIPITATION: August 2000 to current year.
BIOLOGICAL
	BENTHIC MACROINVERTEBRATES: Water year 2000.
	HABITAT: Water year 2000.

REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-82-2: 1966(M), 1968(M), 1970-71(M), 1973(M), 1978-79(M).

GAGE.-- Water-stage recorder, phone telemeter, crest-stage gage, and rain gage. Datum of gage is 704.84 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,580, Feb. 21, 1997, from rating curve extended above 1,960 ft³/s, gage height, 8.77 ft; maximum gage height, 9.66 ft, Feb. 8, 1965, from floodmark, ice jam; minimum discharge, 0.10 ft³/s, several days in 1961 and 1965.
PRECIPITATION: Maximum recorded daily total, 3.27 in., August 13, 2002.

REMARKS FOR CURRENT YEAR.-- Records good except those for 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	8.6	42	49	24	e23	34	38	43	26	20	7.9	18
2	7.8	38	41	24	e22	37	42	148	23	15	6.7	21
3	7.7	35	37	23	e20	38	40	105	23	13	5.9	31
4	6.7	33	35	23	e20	44	37	75	504	13	6.1	20
5	19	31	33	23	e20	38	35	63	986	11	18	15

6	16	29	33	23	20	32	34	56	345	11	12	14
7	12	29	30	21	20	37	39	46	178	10	8.8	12
8	10	28	29	20	19	131	98	44	126	9.7	7.2	11
9	9.0	27	27	22	20	270	244	52	102	59	6.1	11
10	9.8	26	25	22	54	183	154	42	88	39	5.4	10

11	12	25	25	21	67	110	108	68	74	23	5.2	9.5
12	22	26	25	20	52	89	87	515	64	18	4.8	9.2
13	93	26	51	20	44	76	74	332	56	15	79	8.9
14	258	27	50	20	38	66	66	159	78	13	391	9.1
15	124	29	42	20	36	59	59	108	70	12	138	8.5

16	73	27	38	19	35	50	53	121	52	10	62	8.3
17	51	24	40	e19	32	45	49	206	43	9.3	39	7.6
18	40	24	37	e18	29	43	42	123	40	9.0	27	8.1
19	33	25	37	e18	38	40	40	96	36	8.3	22	11
20	28	24	37	e17	111	39	40	80	34	8.4	19	14

21	26	23	33	17	126	37	43	65	30	7.9	16	13
22	24	22	33	17	84	33	46	58	28	7.6	256	14
23	260	22	38	20	64	34	42	54	25	7.7	392	13
24	295	31	35	22	55	33	39	49	22	7.0	156	10
25	247	54	e34	21	48	30	45	48	22	6.6	91	9.1

26	139	43	e32	20	44	29	37	46	22	8.1	63	8.9
27	97	38	31	20	39	29	39	40	21	12	45	8.5
28	74	34	29	20	36	31	73	36	19	12	36	8.7
29	60	36	25	21	---	38	57	36	17	14	27	8.6
30	52	45	26	20	---	49	48	32	18	12	23	8.3

31	46	---	25	e21	---	43	---	28	---	9.1	20	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2002, BY WATER YEAR (WY)
MEAN	22.74	35.75	36.73	36.57	51.76	69.96	71.49	54.56	46.50	25.55	25.67	23.57
MAX	99.3	151	159	134	170	303	186	148	159	113	141	170
(WY)	1973	1986	1983	1969	1997	1979	1993	1996	1993	1996	1987	1972
MIN	1.61	2.39	1.98	1.63	3.31	17.1	16.4	7.87	3.07	1.05	1.65	1.64
(WY)	1964	1972	1964	1977	1963	1968	1977	1989	1977	1961	1964	1976

SUMMARY STATISTICS	FOR 2001 CALENDAR YEAR		FOR 2002 WATER YEAR		WATER YEARS 1961 - 2002
ANNUAL TOTAL	15656.0		18624.7
ANNUAL MEAN	42.89		51.03		42.08
HIGHEST ANNUAL MEAN					76.7	1993
LOWEST ANNUAL MEAN					8.72	1977
HIGHEST DAILY MEAN	587	Feb 10	986	Jun 5	1620	Feb 21 1997
LOWEST DAILY MEAN	2.2	Aug 15	4.8	Aug 12	0.10	A
ANNUAL SEVEN-DAY MINIMUM	2.8	Aug 9	7.1	Aug 6	0.23	Aug 26 1961
MAXIMUM PEAK FLOW			1430	Jun 5	2580 B,C	Feb 21 1997
MAXIMUM PEAK STAGE			6.73	Jun 5	9.66 D	Feb 8 1965
INSTANTANEOUS LOW FLOW			4.2	Aug 12	0.10	E
ANNUAL RUNOFF (CFSM)	0.83		0.99		0.81
ANNUAL RUNOFF (INCHES)	11.27		13.40		11.06
10 PERCENT EXCEEDS	86		97		89
50 PERCENT EXCEEDS	28		31		22
90 PERCENT EXCEEDS	5.1		9.1		4.4

	A - Several days in 1961.
	B - From rating curve extended above 1,960 ft³/s.
	C - Gage height, 8.77 ft.
	D - From floodmark, ice jam.
	E - Several days in 1961 and 1965.

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	8.6	42	49	24	e23	34	38	43	26	20	7.9	18
2	7.8	38	41	24	e22	37	42	148	23	15	6.7	21
3	7.7	35	37	23	e20	38	40	105	23	13	5.9	31
4	6.7	33	35	23	e20	44	37	75	504	13	6.1	20
5	19	31	33	23	e20	38	35	63	986	11	18	15

6	16	29	33	23	20	32	34	56	345	11	12	14
7	12	29	30	21	20	37	39	46	178	10	8.8	12
8	10	28	29	20	19	131	98	44	126	9.7	7.2	11
9	9.0	27	27	22	20	270	244	52	102	59	6.1	11
10	9.8	26	25	22	54	183	154	42	88	39	5.4	10

11	12	25	25	21	67	110	108	68	74	23	5.2	9.5
12	22	26	25	20	52	89	87	515	64	18	4.8	9.2
13	93	26	51	20	44	76	74	332	56	15	79	8.9
14	258	27	50	20	38	66	66	159	78	13	391	9.1
15	124	29	42	20	36	59	59	108	70	12	138	8.5

16	73	27	38	19	35	50	53	121	52	10	62	8.3
17	51	24	40	e19	32	45	49	206	43	9.3	39	7.6
18	40	24	37	e18	29	43	42	123	40	9.0	27	8.1
19	33	25	37	e18	38	40	40	96	36	8.3	22	11
20	28	24	37	e17	111	39	40	80	34	8.4	19	14

21	26	23	33	17	126	37	43	65	30	7.9	16	13
22	24	22	33	17	84	33	46	58	28	7.6	256	14
23	260	22	38	20	64	34	42	54	25	7.7	392	13
24	295	31	35	22	55	33	39	49	22	7.0	156	10
25	247	54	e34	21	48	30	45	48	22	6.6	91	9.1

26	139	43	e32	20	44	29	37	46	22	8.1	63	8.9
27	97	38	31	20	39	29	39	40	21	12	45	8.5
28	74	34	29	20	36	31	73	36	19	12	36	8.7
29	60	36	25	21	---	38	57	36	17	14	27	8.6
30	52	45	26	20	---	49	48	32	18	12	23	8.3

31	46	---	25	e21	---	43	---	28	---	9.1	20	---

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	8.6	42	49	24	e23	34	38	43	26	20	7.9	18
2	7.8	38	41	24	e22	37	42	148	23	15	6.7	21
3	7.7	35	37	23	e20	38	40	105	23	13	5.9	31
4	6.7	33	35	23	e20	44	37	75	504	13	6.1	20
5	19	31	33	23	e20	38	35	63	986	11	18	15

6	16	29	33	23	20	32	34	56	345	11	12	14
7	12	29	30	21	20	37	39	46	178	10	8.8	12
8	10	28	29	20	19	131	98	44	126	9.7	7.2	11
9	9.0	27	27	22	20	270	244	52	102	59	6.1	11
10	9.8	26	25	22	54	183	154	42	88	39	5.4	10

11	12	25	25	21	67	110	108	68	74	23	5.2	9.5
12	22	26	25	20	52	89	87	515	64	18	4.8	9.2
13	93	26	51	20	44	76	74	332	56	15	79	8.9
14	258	27	50	20	38	66	66	159	78	13	391	9.1
15	124	29	42	20	36	59	59	108	70	12	138	8.5

16	73	27	38	19	35	50	53	121	52	10	62	8.3
17	51	24	40	e19	32	45	49	206	43	9.3	39	7.6
18	40	24	37	e18	29	43	42	123	40	9.0	27	8.1
19	33	25	37	e18	38	40	40	96	36	8.3	22	11
20	28	24	37	e17	111	39	40	80	34	8.4	19	14

21	26	23	33	17	126	37	43	65	30	7.9	16	13
22	24	22	33	17	84	33	46	58	28	7.6	256	14
23	260	22	38	20	64	34	42	54	25	7.7	392	13
24	295	31	35	22	55	33	39	49	22	7.0	156	10
25	247	54	e34	21	48	30	45	48	22	6.6	91	9.1

26	139	43	e32	20	44	29	37	46	22	8.1	63	8.9
27	97	38	31	20	39	29	39	40	21	12	45	8.5
28	74	34	29	20	36	31	73	36	19	12	36	8.7
29	60	36	25	21	---	38	57	36	17	14	27	8.6
30	52	45	26	20	---	49	48	32	18	12	23	8.3

31	46	---	25	e21	---	43	---	28	---	9.1	20	---

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	8.6	42	49	24	e23	34	38	43	26	20	7.9	18
2	7.8	38	41	24	e22	37	42	148	23	15	6.7	21
3	7.7	35	37	23	e20	38	40	105	23	13	5.9	31
4	6.7	33	35	23	e20	44	37	75	504	13	6.1	20
5	19	31	33	23	e20	38	35	63	986	11	18	15

6	16	29	33	23	20	32	34	56	345	11	12	14
7	12	29	30	21	20	37	39	46	178	10	8.8	12
8	10	28	29	20	19	131	98	44	126	9.7	7.2	11
9	9.0	27	27	22	20	270	244	52	102	59	6.1	11
10	9.8	26	25	22	54	183	154	42	88	39	5.4	10

11	12	25	25	21	67	110	108	68	74	23	5.2	9.5
12	22	26	25	20	52	89	87	515	64	18	4.8	9.2
13	93	26	51	20	44	76	74	332	56	15	79	8.9
14	258	27	50	20	38	66	66	159	78	13	391	9.1
15	124	29	42	20	36	59	59	108	70	12	138	8.5

16	73	27	38	19	35	50	53	121	52	10	62	8.3
17	51	24	40	e19	32	45	49	206	43	9.3	39	7.6
18	40	24	37	e18	29	43	42	123	40	9.0	27	8.1
19	33	25	37	e18	38	40	40	96	36	8.3	22	11
20	28	24	37	e17	111	39	40	80	34	8.4	19	14

21	26	23	33	17	126	37	43	65	30	7.9	16	13
22	24	22	33	17	84	33	46	58	28	7.6	256	14
23	260	22	38	20	64	34	42	54	25	7.7	392	13
24	295	31	35	22	55	33	39	49	22	7.0	156	10
25	247	54	e34	21	48	30	45	48	22	6.6	91	9.1

26	139	43	e32	20	44	29	37	46	22	8.1	63	8.9
27	97	38	31	20	39	29	39	40	21	12	45	8.5
28	74	34	29	20	36	31	73	36	19	12	36	8.7
29	60	36	25	21	---	38	57	36	17	14	27	8.6
30	52	45	26	20	---	49	48	32	18	12	23	8.3

31	46	---	25	e21	---	43	---	28	---	9.1	20	---