05554500 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05554500 VERMILION RIVER AT PONTIAC, IL

LOCATION.-- Lat 40°52'40", long 88°38'10", in SE1/4SW1/4 sec.22, T.28 N., R.5 E., Livingston County, Hydrologic Unit 07130002, near center of span on downstream side of bridge on Vermilion Street in Pontiac, 0.1 mi upstream from State Highway 116, 0.8 mi upstream from Turtle Creek, and at mile 60.3.

DRAINAGE AREA.-- 579 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1942 to current year.

STAGE: Water years 1994-2001.

REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-83-2: 1951, 1957, 1965(M), 1968, 1970, 1980. WDR IL-98: 1997 (P).

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 619.45 ft above sea level. Prior to Nov. 8, 1965, nonrecording gage at same site and datum.

REMARKS.-- An average of 3 ft³/s, diverted 0.5 mi upstream from station for water supply of city of Pontiac, is not included in records.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 13,100 ft³/s, Dec. 4, 1982, gage height; 19.16 ft; no flow for many days in 1953, 1983-84, 1986-91.

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

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	.83	2.1	51	e20	1380	1310	281	341	635	137	37	15
2	.97	3.1	49	e21	1290	992	266	331	844	123	33	12
3	.95	4.9	48	23	945	801	245	299	652	201	26	8.7
4	14	8.8	52	24	742	692	228	271	499	695	24	7.2
5	15	7.4	46	25	575	613	217	262	3560	665	20	6.3

6	14	13	53	26	517	538	265	250	7830	383	15	5.4
7	19	28	53	26	592	483	465	239	8060	257	12	4.9
8	18	29	52	25	1270	450	552	226	6330	225	10	5.1
9	15	66	48	24	5320	421	462	216	4050	373	9.2	13
10	11	223	47	22	6870	384	622	210	2420	488	9.1	11

11	7.8	285	47	22	4480	365	1350	232	1680	346	11	8.2
12	4.6	187	39	23	2280	347	1580	233	1280	235	11	6.7
13	4.5	133	38	24	1560	360	1210	204	988	179	9.5	8.1
14	4.1	127	36	28	1400	356	837	185	770	148	5.6	12
15	4.7	122	33	32	1710	334	690	185	629	128	4.2	11

16	5.2	101	34	37	1560	390	577	190	535	112	5.3	10
17	4.7	86	33	42	1200	697	507	190	450	101	6.1	8.5
18	3.6	77	31	45	867	1040	445	270	390	94	11	12
19	1.6	64	e28	49	716	1000	412	372	351	87	10	54
20	1.3	50	e25	53	618	813	401	347	318	80	14	70

21	1.4	45	e23	51	509	675	398	300	305	72	14	52
22	2.3	50	e21	46	446	582	714	269	308	70	16	44
23	3.5	46	e20	43	421	513	1160	e230	283	69	27	38
24	3.6	43	e19	42	561	464	951	199	250	61	41	28
25	6.0	44	e18	41	4300	417	685	204	221	53	53	21

26	6.3	48	e18	41	5030	372	550	240	198	48	47	16
27	7.4	48	e18	40	2970	361	485	507	180	42	31	15
28	6.5	48	e17	40	1830	330	426	727	167	40	23	13
29	8.4	49	e18	59	---	322	376	552	156	42	23	12
30	8.2	48	e18	220	---	311	347	429	146	40	17	11

31	4.1	---	e19	791	---	293	---	375	---	42	16	---

TOTAL	208.55	2086.3	1052	2005	51959	17026	17704	9085	44485	5636	591.0	539.1
MEAN	6.73	69.5	33.9	64.7	1856	549	590	293	1483	182	19.1	18.0
MAX	19	285	53	791	6870	1310	1580	727	8060	695	53	70
MIN	.83	2.1	17	20	421	293	217	185	146	40	4.2	4.9
CFSM	.01	.12	.06	.11	3.20	.95	1.02	.51	2.56	.31	.03	.03
IN.	.01	.13	.07	.13	3.34	1.09	1.14	.58	2.86	.36	.04	.03

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1943 - 2001, BY WATER YEAR (WY)
MEAN	133	226	330	365	513	736	808	719	575	323	122	119
MAX	1682	2327	2773	1981	1856	3123	2801	2968	2232	2350	1186	1540
(WY)	1994	1986	1983	1993	2001	1979	1957	1943	1980	1951	1943	1989
MIN	.000	.93	4.58	3.03	6.71	23.2	109	71.1	27.0	.000	.000	.000
(WY)	1989	2000	1954	1977	1963	2000	1977	1964	1988	1988	1988	1988

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1943 - 2001
ANNUAL TOTAL	49278.81		152376.95
ANNUAL MEAN	135		417		413
HIGHEST ANNUAL MEAN					1094	1993
LOWEST ANNUAL MEAN					49.7	1964
HIGHEST DAILY MEAN	2260	Jul 6	8060	Jun 7	12300	Dec 4 1982
LOWEST DAILY MEAN	.17	Sep 6	.83	Oct 1	.00	A
ANNUAL SEVEN-DAY MINIMUM	.21	Sep 2	2.5	Oct 18	.00	Jul 1 1988
MAXIMUM PEAK FLOW			8440	Jun 7	13100	Dec 4 1982
MAXIMUM PEAK STAGE			14.94	Jun 7	19.16	Dec 4 1982
INSTANTANEOUS LOW FLOW			.57	Oct 3
ANNUAL RUNOFF (CFSM)	.23		.72		.71
ANNUAL RUNOFF (INCHES)	3.17		9.79		9.70
10 PERCENT EXCEEDS	381		853		1050
50 PERCENT EXCEEDS	24		70		130
90 PERCENT EXCEEDS	.92		8.0		6.4

A - Many days in 1953, 1983-84, 1986-91.