05579500 DATA: Discharge Tables, 2000

Station list Available data
ILLINOIS RIVER BASIN

05579500 LAKE FORK NEAR CORNLAND, IL

LOCATION.-- Lat 39°57'05", long 89°23'01", in NW1/4 SW1/4 sec.1, T.17 N., R.3 W., Logan County, Hydrologic Unit 07130009, on right bank at downstream side of bridge on State Highway 54, 100 ft upstream from a railroad bridge, 2.0 mi northeast of Cornland, 8 mi downstream from Jones Fork, and at mile 12.9.

DRAINAGE AREA.-- 214 mi².

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

DISCHARGE: January 1948 to current year.

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-91.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 555.06 ft above sea level. Prior to Sept. 6, 1973, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 8,930 ft³/s, Apr. 12, 1979, gage height, 23.11 ft; minimum, 0.30 ft³/s, Sept. 16, 1988.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood in May 1943 reached a stage of 23.4 ft, from floodmarks, discharge 29,000 ft³/s, by contracted-opening measurement of peak flow.

REMARKS FOR CURRENT YEAR.-- Records good except those for Apr. 27 to July 18, which are fair, and those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	9.5	12	10	26	e14	70	88	189	108	356	44	16
2	8.7	12	10	22	e15	61	89	178	97	275	40	16
3	9.2	12	12	22	e15	57	89	151	89	260	39	15
4	11	12	13	22	e16	57	85	140	89	255	36	15
5	11	12	20	e23	e16	55	75	129	115	893	70	14

6	10	12	32	e25	e17	51	78	122	114	1190	103	14
7	11	12	29	21	e18	48	75	117	92	625	64	14
8	11	12	27	19	e19	47	75	113	87	452	50	14
9	19	13	25	20	e20	49	65	112	78	371	44	14
10	20	13	27	20	e25	45	64	103	73	322	38	14

11	20	13	27	21	e30	44	64	95	79	378	34	13
12	17	13	27	19	e34	44	64	96	102	e330	32	14
13	15	13	27	18	36	46	61	164	299	e290	30	14
14	12	13	27	e18	34	50	62	140	274	e260	28	13
15	11	13	27	e19	30	49	62	112	199	228	25	14

16	11	13	27	20	28	49	60	101	157	193	24	14
17	12	13	27	17	26	44	77	96	127	165	88	14
18	15	12	28	e16	75	41	80	93	109	147	260	14
19	14	13	28	e15	219	55	75	86	97	130	84	14
20	13	13	e27	e14	172	207	275	80	299	115	54	15

21	13	13	e26	e13	141	271	358	77	1470	105	43	15
22	13	13	e25	e12	123	216	258	76	1000	94	37	16
23	12	14	e24	e12	108	186	220	82	631	85	34	16
24	12	15	e23	e11	99	170	415	74	880	77	32	16
25	11	15	e21	e11	87	153	445	65	1150	71	29	17

26	11	14	e20	e11	80	136	336	62	976	64	27	18
27	12	14	e21	e12	78	139	291	162	805	59	28	18
28	11	13	e22	e12	68	130	256	247	608	55	25	17
29	12	12	e23	e13	65	111	222	180	507	53	22	17
30	13	10	e24	e13	---	100	e200	145	430	50	19	17

31	12	---	e25	e14	---	92	---	124	---	49	18	---

TOTAL	392.4	384	731	531	1708	2873	4664	3711	11141	7997	1501	452
MEAN	12.7	12.8	23.6	17.1	58.9	92.7	155	120	371	258	48.4	15.1
MAX	20	15	32	26	219	271	445	247	1470	1190	260	18
MIN	8.7	10	10	11	14	41	60	62	73	49	18	13
CFSM	.06	.06	.11	.08	.28	.43	.73	.56	1.74	1.21	.23	.07
IN.	.07	.07	.13	.09	.30	.50	.81	.65	1.94	1.39	.26	.08

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1948 - 2000, BY WATER YEAR (WY)
MEAN	63.3	78.3	143	149	208	264	290	294	239	135	74.1	42.5
MAX	680	1009	1260	988	712	1116	1016	1024	1099	772	887	546
(WY)	1978	1986	1983	1950	1959	1979	1979	1995	1974	1981	1981	1993
MIN	2.02	2.06	2.46	4.01	5.02	6.56	16.7	7.27	17.0	7.20	3.84	1.57
(WY)	1955	1955	1964	1977	1963	1954	1954	1954	1963	1954	1988	1954

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1948 - 2000
ANNUAL TOTAL	60573.7		36085.4
ANNUAL MEAN	166		98.6		165
HIGHEST ANNUAL MEAN					372	1993
LOWEST ANNUAL MEAN					8.89	1954
HIGHEST DAILY MEAN	1620	Jun 14	1470	Jun 21	7000	Dec 4 1982
LOWEST DAILY MEAN	7.1	Sep 27	8.7	Oct 2	.77	Sep 16 1988
ANNUAL SEVEN-DAY MINIMUM	8.6	Sep 22	10	Oct 1	.96	Sep 7 1988
INSTANTANEOUS PEAK FLOW			1570	Jun 21	8930	Apr 12 1979
INSTANTANEOUS PEAK STAGE			14.60	Jun 21	23.11	Apr 12 1979
INSTANTANEOUS LOW FLOW			1.8 A	Jan 17	.30	Sep 16 1988
ANNUAL RUNOFF (CFSM)	.78		.46		.77
ANNUAL RUNOFF (INCHES)	10.53		6.27		10.47
10 PERCENT EXCEEDS	451		255		400
50 PERCENT EXCEEDS	40		34		62
90 PERCENT EXCEEDS	10		12		6.8

A - Result of freeze up.