05547755 DATA: Discharge Tables, 2004

Station list Available data
ILLINOIS RIVER BASIN


LOCATION.-- Lat 42°21'00", long 88°05'18" (NAD of 1927), in SW1/4NE1/4 sec.29, T.45 N., R.10 E., Lake County, Hydrologic Unit 07120006, on left bank at upstream side of bridge on MacGillis Road at Round Lake, and at mile 7.5.

DRAINAGE AREA.-- 17.2 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1989 to current year.
	STAGE: Water years 1994 to current year.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 764.94 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 312 ft³/s, July 18, 1993, from rating curve extended above 120 ft³/s on basis of slope-area measurement of peak flow, gage height, 6.42 ft; no flow at times in 1991, 1994 and 1998.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	0.23	1.2	4.7	8.2	e2.2	33	55	12	76	6.9	1.2	0.74
2	0.21	3.9	4.1	7.8	e2.2	41	44	12	60	5.7	0.69	0.69
3	0.72	14	3.7	7.8	e2.2	34	36	11	48	7.6	1.1	0.62
4	0.44	20	3.1	7.0	e2.2	32	30	11	40	18	3.5	0.62
5	0.42	40	4.9	7.0	e2.2	91	26	9.4	33	14	2.1	0.57

6	0.43	22	6.0	7.7	e2.3	95	22	8.5	29	11	1.9	0.60
7	0.45	11	5.4	5.1	e2.3	84	19	7.7	25	9.2	1.5	0.63
8	0.33	7.3	5.0	5.4	e2.4	71	16	8.0	21	8.4	1.1	0.54
9	0.22	5.4	6.5	5.1	e2.4	57	14	9.8	21	8.6	0.87	0.45
10	0.22	4.4	56	5.0	e2.3	48	13	10	49	26	0.65	0.47

11	0.19	3.8	64	e4.6	e2.2	40	11	13	76	20	0.59	0.62
12	0.34	3.4	46	e4.4	e2.2	32	10	14	86	13	0.63	1.1
13	0.46	3.3	33	e4.2	e2.1	27	8.8	31	73	10	0.62	0.56
14	2.4	3.0	27	e4.0	e2.1	26	8.0	49	56	7.8	0.61	0.44
15	1.2	2.9	22	e3.8	e2.0	25	7.7	56	45	6.7	0.55	0.88

16	0.74	2.4	20	e3.7	e2.0	21	6.5	44	38	5.7	0.46	1.3
17	0.74	2.5	17	e3.5	e2.1	19	6.4	35	33	4.9	0.75	1.3
18	0.79	14	15	e3.4	e2.2	20	7.2	141	27	3.5	0.58	1.3
19	0.78	21	13	e3.4	4.8	20	8.0	150	23	4.0	0.40	0.70
20	0.53	14	13	e3.3	9.2	19	9.5	123	20	3.1	0.32	0.43

21	0.41	10	9.3	e3.2	18	16	22	94	26	2.9	0.29	0.75
22	0.43	8.4	8.9	e3.0	26	15	19	155	38	3.2	0.28	1.4
23	0.57	12	8.7	e2.9	32	15	16	183	27	5.7	0.27	1.6
24	0.78	13	7.6	e2.7	33	23	14	163	22	4.4	0.70	1.6
25	1.0	12	8.2	e2.5	31	29	20	128	19	3.4	0.57	0.89

26	0.85	7.8	6.2	e2.4	29	62	18	97	16	2.9	0.62	0.46
27	0.87	6.4	5.4	e2.3	19	65	16	75	13	2.5	0.87	0.29
28	1.1	5.5	8.0	e2.2	19	65	15	62	12	2.2	1.6	0.33
29	1.0	5.9	11	e2.2	21	88	13	54	10	1.9	1.4	0.34
30	0.94	5.0	11	e2.1	---	79	11	61	8.0	1.7	1.1	0.34

31	0.94	---	9.1	e2.1	---	66	---	76	---	1.8	0.86	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2004, BY WATER YEAR (WY)
MEAN	6.27	11.7	10.5	12.4	22.2	25.7	29.6	29.1	19.4	10.0	2.49	3.06
MAX	52.5	33.6	26.6	40.2	55.4	45.8	79.4	99.6	74.4	54.0	7.60	12.9
(WY)	2002	1993	1992	1999	2001	1990	1993	1996	1996	1993	1990	1992
MIN	0.40	0.92	0.98	0.74	0.45	2.12	7.76	3.36	0.76	0.44	0.19	0.11
(WY)	1995	2003	1990	2003	2003	2003	2003	1994	1992	1991	1991	1994

SUMMARY STATISTICS	FOR 2003 CALENDAR YEAR		FOR 2004 WATER YEAR		WATER YEARS 1990 - 2004
ANNUAL TOTAL	2688.33		6314.07
ANNUAL MEAN	7.37		17.3		15.1
HIGHEST ANNUAL MEAN					27.6	1993
LOWEST ANNUAL MEAN					5.61	2003
HIGHEST DAILY MEAN	77	May 9	183	May 23	284	May 21 1996
LOWEST DAILY MEAN	0.11	Sep 9	0.19	Oct 11	0.00	A
ANNUAL SEVEN-DAY MINIMUM	0.14	Sep 5	0.31	Oct 6	0.00	Sep 10 1994
MAXIMUM PEAK FLOW			196	May 22	312 B	Jul 18 1993
MAXIMUM PEAK STAGE			4.97	May 22	6.42	Jul 18 1993
INSTANTANEOUS LOW FLOW			0.12	Oct 11
ANNUAL RUNOFF (CFSM)	0.433		1.01		0.891
ANNUAL RUNOFF (INCHES)	5.88		13.82		12.11
10 PERCENT EXCEEDS	22		49		38
50 PERCENT EXCEEDS	2.9		6.9		6.0
90 PERCENT EXCEEDS	0.35		0.58		0.57

	A - No flow at times in 1991, 1994 and 1998.
	B - From rating curve extended above 120 ft³/s on basis of slope-area measurement of peak flow.