05567500 DATA: Discharge Tables, 1999

Station list Available data
ILLINOIS RIVER BASIN

05567500 MACKINAW RIVER NEAR CONGERVILLE, IL

LOCATION.--Lat 40°37'25", long 89°14'30", in NE1/4SW1/4 sec.17, T.25 N., R.1 W., Woodford County, Hydrologic Unit 07130004, on right bank at downstream side of bridge on U.S. Highway 150, 0.2 mi downstream from Walnut Creek, 2 mi northwest of Congerville, and at mile 58.7.

DRAINAGE AREA.--767 mi².

PERIOD OF RECORD.--October 1944 to current year.

REVISED RECORDS.--WSP 1175: 1948. WSP 1308: 1945(M). WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 607.01 ft above sea level. Prior to July 11, 1945, nonrecording gage at same site and datum.

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

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	12	17	18	20	1030	464	327	1200	679	603	44	15
2	13	16	18	e29	1180	403	302	1060	925	748	38	15
3	14	16	18	e21	1080	418	286	965	1170	757	36	15
4	16	15	19	e17	865	471	297	889	1170	573	34	15
5	16	15	19	e15	679	476	258	859	1960	463	32	15

6	30	15	23	e17	585	497	288	885	1560	394	33	14
7	27	16	103	e20	559	502	235	1050	1160	340	39	13
8	20	16	104	e18	647	497	239	920	936	300	48	12
9	18	23	79	e17	836	539	296	798	815	270	44	11
10	16	48	52	e17	818	532	307	725	734	234	37	9.6

11	14	96	44	e16	732	429	290	690	765	202	32	9.8
12	14	56	39	e16	676	371	252	837	3760	179	66	10
13	13	41	35	e15	551	360	221	3130	6080	160	68	11
14	11	33	33	e15	474	360	221	4330	10100	147	54	9.8
15	11	28	28	e14	451	377	301	2700	10400	136	43	9.1

16	11	25	27	e14	418	561	2200	1970	5270	118	36	8.9
17	14	23	26	e18	369	1290	4470	5900	2300	107	30	8.6
18	31	21	26	e28	333	1330	3870	6700	1750	100	26	8.7
19	41	20	25	e33	315	960	2550	2690	1450	92	25	8.8
20	36	18	27	e39	282	783	1950	1940	1250	85	23	8.7

21	31	17	25	e54	251	703	1660	1630	1110	78	23	9.0
22	19	18	22	e700	239	610	1510	1870	989	73	21	9.2
23	15	17	22	e2300	250	538	1530	1560	897	67	22	9.0
24	17	16	21	e2700	254	494	1440	1390	822	59	28	8.3
25	18	17	20	1820	245	434	1230	1200	873	56	28	8.2

26	16	16	20	1300	236	383	1100	1040	835	54	26	8.0
27	17	15	20	1500	296	365	1090	926	718	51	22	11
28	21	15	20	2500	430	361	1540	848	641	56	21	15
29	17	17	19	1560	---	344	1650	781	567	55	19	15
30	16	19	18	1060	---	312	1420	727	495	56	17	13

31	18	---	22	900	---	310	---	700	---	49	16	---

TOTAL	583	725	992	16793	15081	16474	33330	52910	62181	6662	1031	333.7
MEAN	18.8	24.2	32.0	542	539	531	1111	1707	2073	215	33.3	11.1
MAX	41	96	104	2700	1180	1330	4470	6700	10400	757	68	15
MIN	11	15	18	14	236	310	221	690	495	49	16	8.0
CFSM	.02	.03	.04	.71	.70	.69	1.45	2.23	2.70	.28	.04	.01
IN.	.03	.04	.05	.81	.73	.80	1.62	2.57	3.02	.32	.05	.02

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 1999, BY WATER YEAR (WY)
MEAN	198	276	403	478	624	951	1075	911	786	374	182	229
MAX	2765	3340	4062	2808	2089	3157	3136	4216	3322	2687	2734	4330
(WY)	1987	1986	1983	1993	1951	1979	1973	1995	1974	1951	1981	1993
MIN	.59	2.47	2.40	6.01	14.9	68.1	99.7	114	21.6	6.09	1.22	1.84
(WY)	1957	1964	1964	1945	1963	1956	1977	1958	1963	1988	1988	1988

SUMMARY STATISTICS	FOR 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1945 - 1999
ANNUAL TOTAL	287612.9		207095.7
ANNUAL MEAN	788		567		539
HIGHEST ANNUAL MEAN					1672	1993
LOWEST ANNUAL MEAN					78.2	1989
HIGHEST DAILY MEAN	11700	May 9	10400	Jun 15	34000	Dec 4 1982
LOWEST DAILY MEAN	9.9	Sep 30	8.0	Sep 26	.20	A
ANNUAL SEVEN-DAY MINIMUM	11	Sep 24	8.6	Sep 20	.20	Oct 27 1956
INSTANTANEOUS PEAK FLOW			13800	Jun 14	44800	Dec 4 1982
INSTANTANEOUS PEAK STAGE			16.89	Jun 14	20.21 B	Dec 4 1982
INSTANTANEOUS LOW FLOW			7.2	Sep 26, 27	0.20 C
ANNUAL RUNOFF (CFSM)	1.03		.74		.70
ANNUAL RUNOFF (INCHES)	13.95		10.04		9.55
10 PERCENT EXCEEDS	1910		1470		1290
50 PERCENT EXCEEDS	381		85		188
90 PERCENT EXCEEDS	15		15		12

A - Oct. 21-24, Oct. 27 to Nov. 3, 1956
B - From floodmark.
C - Oct. 21-24, Oct. 27 to Nov. 3, 1956; Oct. 6, 1957; Oct. 8-10, 1963.