05555300 DATA: Discharge Tables, 1999

Station list Available data
ILLINOIS RIVER BASIN

05555300 VERMILION RIVER NEAR LEONORE, IL

LOCATION.--Lat 41°12'30", long 88°55'51", in SW1/4SW1/4 sec.30, T.32 N., R.3 E., La Salle County, Hydrologic Unit 07130002, on left downstream side of bridge on County Highway 57 (Red, White and Blue Bridge Road), 3 mi northeast of Leonore, 6.2 mi downstream from Otter Creek, 8 mi northwest of Streator, and at mile 17.2.

DRAINAGE AREA.--1,251 mi².

PERIOD OF RECORD.--May 1931 to current year. Prior to October 1971, published as "at Lowell."

REVISED RECORDS.--WSP 745: 1931-32. WSP 1308: 1932(M), 1935-38(M), 1940(M), 1942(M). WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 520.58 ft above sea level. Prior to Aug. 20, 1952, nonrecording gage at site 6.8 mi downstream at datum 19.97 ft lower. Aug. 20, 1952 to Sept. 30, 1971, nonrecording gage at site 6.7 mi downstream at datum 19.97 ft lower.

REMARKS.--Records fair except those for estimated daily discharges, which are poor. U.S. Army Corps of Engineers satellite telemeter at station.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 33,500 ft³/s, July 15, 1958, gage height, 15.30 ft, from graph based on gage readings, site and datum then in use; maximum gage height, 27.13 ft, Dec. 4, 1982, present site; minimum discharge, 2.6 ft³/s, Aug. 3, 1988.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	20	45	21	e25	2370	1020	453	1700	732	504	38	13
2	19	52	20	e29	2670	862	455	1470	1350	556	28	12
3	18	43	22	e36	2630	700	444	1310	1110	663	23	12
4	19	31	23	e34	2150	841	437	1180	1130	565	21	11
5	20	25	21	e32	1650	887	407	1080	1470	440	19	10

6	35	22	29	e32	1310	781	402	1060	1510	368	18	9.8
7	42	20	93	e36	1150	865	374	1170	1190	322	17	9.1
8	40	20	123	e35	1090	968	370	1150	936	288	20	9.4
9	31	22	89	e34	1420	850	477	965	796	258	21	8.9
10	26	92	72	e32	1880	751	499	844	715	230	21	8.6

11	24	85	60	e31	1680	739	497	810	657	205	19	8.5
12	23	69	57	e30	1360	625	462	1940	838	181	29	9.6
13	21	60	51	e29	1120	579	443	4870	4030	158	44	11
14	18	50	46	e29	913	570	423	5360	10400	140	49	8.8
15	19	47	43	e28	808	598	482	3890	10100	125	36	9.1

16	20	45	39	e28	726	731	4080	2910	4750	111	28	8.9
17	24	45	35	e28	669	2280	9950	3400	2960	101	26	7.8
18	40	41	34	e29	608	3120	9710	4680	2170	91	25	9.5
19	35	39	35	e31	566	2120	6760	3070	1690	85	63	10
20	29	33	31	e34	516	1500	4370	2270	1360	93	37	9.7

21	32	30	32	e40	468	1210	3380	1860	1130	85	27	11
22	24	27	31	e70	430	1020	3270	1740	993	41	21	9.2
23	22	23	25	e350	411	871	4200	1500	894	54	19	8.3
24	20	21	21	e2000	404	759	5080	1350	1050	73	38	7.6
25	20	18	22	4070	402	675	3620	1180	1510	70	25	8.3

26	19	20	25	3730	383	606	2680	1020	1050	63	26	8.1
27	24	19	26	3440	387	560	2210	893	818	51	26	8.4
28	57	18	27	5090	510	540	1950	798	691	46	20	42
29	32	18	26	4740	---	520	1900	736	601	42	18	35
30	24	19	e25	3480	---	482	1930	698	516	36	15	19

31	22	---	e24	2590	---	455	---	678	---	33	12	---

TOTAL	819	1099	1228	30222	30681	29085	71715	57582	59147	6078	829	353.6
MEAN	26.4	36.6	39.6	975	1096	938	2390	1857	1972	196	26.7	11.8
MAX	57	92	123	5090	2670	3120	9950	5360	10400	663	63	42
MIN	18	18	20	25	383	455	370	678	516	33	12	7.6
CFSM	.02	.03	.03	.78	.88	.75	1.91	1.48	1.58	.16	.02	.01
IN.	.02	.03	.04	.90	.91	.86	2.13	1.71	1.76	.18	.02	.01

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1972 - 1999, BY WATER YEAR (WY)
MEAN	456	769	1059	960	1293	2151	1947	1661	1358	714	354	431
MAX	3188	4978	6201	4259	3681	7649	5098	5152	4442	2966	2678	3997
(WY)	1987	1986	1983	1993	1997	1979	1982	1995	1980	1993	1981	1993
MIN	11.4	11.4	11.4	6.36	40.9	192	208	241	78.5	8.83	6.89	11.8
(WY)	1972	1972	1977	1977	1977	1996	1977	1992	1988	1988	1988	1999

SUMMARY STATISTICS	FOR 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1972 - 1999
ANNUAL TOTAL	483909		288838.6
ANNUAL MEAN	1326		791		1094
HIGHEST ANNUAL MEAN					2419	1993
LOWEST ANNUAL MEAN					280	1977
HIGHEST DAILY MEAN	16200	May 9	10400	Jun 14	30000	Dec 4 1982
LOWEST DAILY MEAN	12	Sep 28	7.6	Sep 24	2.6	Aug 3 1988
ANNUAL SEVEN-DAY MINIMUM	14	Sep 23	8.7	Sep 21	3.0	Jul 30 1988
INSTANTANEOUS PEAK FLOW			11900	Jun 15	31800	Dec 4 1982
INSTANTANEOUS PEAK STAGE			17.34	Jun 15	27.13	Dec 4 1982
INSTANTANEOUS LOW FLOW			7.1	A	2.6	Aug 3 1988
ANNUAL RUNOFF (CFSM)	1.06		.63		.87
ANNUAL RUNOFF (INCHES)	14.39		8.59		11.89
10 PERCENT EXCEEDS	3380		2230		2720
50 PERCENT EXCEEDS	570		85		418
90 PERCENT EXCEEDS	20		18		29

A - Sept. 17, 24, 26.