USGS CD-ROM: Current Year Discharge

05567500 MACKINAW RIVER NEAR CONGERVILLE, IL

LOCATION.--Lat 40°37'25", long 89°14'30", in NE¼SW¼ 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 Mar. 18 to July 29, which are fair, and 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 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	27	45	192	201	956	936	1630	5410	622	999	55	23
2	27	45	151	215	1090	842	1610	4470	575	719	53	21
3	27	47	138	242	988	767	1420	2780	543	585	50	20
4	25	44	138	286	874	704	1280	2200	518	518	51	18
5	25	42	123	558	780	636	1250	2500	499	555	59	17

6	23	55	111	961	688	587	1170	3000	476	545	64	18
7	21	101	102	1090	621	564	1090	4490	455	854	59	17
8	21	108	94	1610	572	829	1490	7530	428	1260	53	14
9	21	95	94	2170	531	1940	1590	11700	608	901	49	12
10	21	84	102	1950	508	2380	1450	6860	828	620	44	12

11	21	75	95	1370	1230	1940	1250	3210	1140	476	41	11
12	21	67	85	1070	2660	1510	1130	2280	2770	382	37	12
13	27	62	83	879	1920	1280	1080	2250	e2300	323	35	13
14	36	64	84	764	1430	1200	1180	1830	e2100	286	34	14
15	36	63	86	715	1190	1140	1130	1490	e1900	251	32	17

16	33	57	79	629	1050	1070	1240	1330	2090	220	33	19
17	31	51	79	553	1010	2190	1060	1140	e3000	184	29	15
18	26	49	82	490	1090	7610	922	1030	e3400	162	91	15
19	28	51	88	430	1190	7710	838	956	2600	147	82	14
20	26	50	104	386	1130	5880	819	914	1890	136	58	14

21	25	48	114	418	1020	4540	1020	865	1520	125	48	12
22	24	48	126	381	931	4980	1470	824	1250	131	41	12
23	23	46	137	361	869	4780	1290	843	1130	147	36	10
24	28	43	155	342	814	3360	1090	1130	1000	118	32	11
25	28	42	250	323	747	2240	975	1230	894	103	29	14

26	29	42	340	312	732	1900	903	1020	778	92	27	11
27	e40	45	343	305	951	1620	768	861	698	84	25	10
28	52	55	286	313	1050	1670	675	785	615	77	27	11
29	49	157	282	451	---	1910	760	735	545	72	28	10
30	48	186	236	688	---	1770	1690	766	855	67	26	9.9

31	45	---	191	729	---	1580	---	728	---	61	25	---

TOTAL	914	1967	4570	21192	28622	72065	35270	77157	38027	11200	1353	426.9
MEAN	29.5	65.6	147	684	1022	2325	1176	2489	1268	361	43.6	14.2
MAX	52	186	343	2170	2660	7710	1690	11700	3400	1260	91	23
MIN	21	42	79	201	508	564	675	728	428	61	25	9.9
CFSM	.04	.09	.19	.89	1.33	3.03	1.53	3.25	1.65	.47	.06	.02
IN.	.04	.10	.22	1.03	1.39	3.50	1.71	3.74	1.84	.54	.07	.02

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 1998, BY WATER YEAR (WY)
MEAN	201	280	410	477	626	959	1074	896	762	377	185	233
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 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1945 - 1998
ANNUAL TOTAL	120906		292763.9
ANNUAL MEAN	331		802		539
HIGHEST ANNUAL MEAN					1672	1993
LOWEST ANNUAL MEAN					78.2	1989
HIGHEST DAILY MEAN	6320	Feb 27	11700	May 9	34000	Dec 4 1982
LOWEST DAILY MEAN	14	Aug 8	9.9	Sep 30	.20	A
ANNUAL SEVEN-DAY MINIMUM	19	Aug 3	11	Sep 24	.20	Oct 27 1956
INSTANTANEOUS PEAK FLOW			13100	May 9	44800	Dec 4 1982
INSTANTANEOUS PEAK STAGE			16.42	May 9	20.21 B	Dec 4 1982
INSTANTANEOUS LOW FLOW			8.7	Sep 30	.20	C
ANNUAL RUNOFF (CFSM)	.43		1.05		.70
ANNUAL RUNOFF (INCHES)	5.86		14.20		9.54
10 PERCENT EXCEEDS	689		1910		1290
50 PERCENT EXCEEDS	113		381		189
90 PERCENT EXCEEDS	30		23		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.