05594450 DATA: Discharge Tables, 2001

Station list Available data
KASKASKIA RIVER BASIN

05594450 SILVER CREEK NEAR TROY, IL

LOCATION.-- Lat 38°43'00", long 89°49'45", in SE1/4SW1/4 sec.12, T.3 N., R.7 W., Madison County, Hydrologic Unit 07140204, on right bank at upstream side of bridge on U.S. Highway 40, 0.2 mi upstream from railroad bridge, 1.9 mi upstream from East Fork Silver Creek, 1.9 mi southeast of Troy, and at mile 44.6.

DRAINAGE AREA.-- 154 mi².

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

DISCHARGE: October 1966 to current year.

STAGE: Water years 1994-2001.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-91.

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

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 438.91 ft above sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 10,600 ft³/s, April 12, 1979, gage height, 17.52 ft; maximum gage height, 17.94 ft, May 17, 1990, discharge, 9,170 ft³/s; no flow for several days in 1967-68, 1973, 1988.

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	31	e15	56	e21	787	123	32	15	366	3.2	2.4	2.4
2	24	e18	51	e20	334	98	30	14	85	3.1	2.5	2.1
3	19	e24	47	e20	117	85	46	14	35	3.0	7.6	2.1
4	173	e21	44	e22	103	73	46	13	246	7.8	2.7	2.2
5	922	e20	41	e26	79	62	47	13	453	6.0	2.3	2.2

6	866	e100	39	e31	74	54	41	15	526	4.3	2.2	2.4
7	869	509	37	e36	69	50	38	19	552	3.5	2.1	2.3
8	324	567	35	e42	68	47	42	15	280	3.1	2.4	2.9
9	83	777	34	e42	380	45	38	13	67	2.9	2.3	15
10	46	948	33	e36	701	43	36	13	36	2.8	3.9	12

11	36	1170	54	e32	882	41	448	11	26	2.6	3.1	4.3
12	31	639	e140	e30	390	41	1060	8.7	21	2.6	2.4	2.7
13	26	372	e180	e37	166	40	556	7.6	17	2.5	1.9	2.1
14	23	360	e160	e170	264	38	126	7.3	14	2.4	1.6	2.0
15	34	159	e80	e450	292	40	69	7.0	12	2.4	1.7	2.0

16	91	96	e58	e520	180	87	54	6.3	11	2.4	1.8	2.1
17	401	73	e47	e500	112	101	43	5.6	12	2.4	1.8	1.9
18	209	58	e40	e280	76	82	35	6.8	9.2	9.4	2.4	47
19	90	49	e35	e180	65	59	32	19	7.3	64	1.6	63
20	56	45	e31	e120	65	50	31	12	7.1	26	1.5	15

21	42	41	e29	e85	59	46	29	37	10	15	1.6	7.3
22	e33	37	e27	e70	54	43	27	28	11	7.7	2.2	3.9
23	e29	34	e25	e58	52	41	26	25	7.0	4.5	2.5	2.8
24	e26	33	e24	e54	140	39	25	15	5.8	16	644	2.3
25	e23	144	e23	e48	672	37	23	11	6.0	6.3	474	2.0

26	e21	315	e22	e45	1150	34	23	9.5	5.7	3.4	79	2.0
27	e19	250	e23	e42	1000	32	21	7.8	4.4	3.0	17	2.1
28	e18	118	e25	e40	330	32	19	6.7	3.5	2.5	8.7	2.1
29	e17	81	e24	e90	---	34	18	6.1	3.3	2.3	5.3	2.4
30	e16	61	e23	478	---	34	17	8.2	3.1	2.1	3.6	2.8

31	e15	---	e22	626	---	33	---	265	---	2.2	2.7	---

TOTAL	4613	7134	1509	4251	8661	1664	3078	654.6	2842.4	221.4	1290.8	217.4
MEAN	149	238	48.7	137	309	53.7	103	21.1	94.7	7.14	41.6	7.25
MAX	922	1170	180	626	1150	123	1060	265	552	64	644	63
MIN	15	15	22	20	52	32	17	5.6	3.1	2.1	1.5	1.9
CFSM	.97	1.54	.32	.89	2.01	.35	.67	.14	.62	.05	.27	.05
IN.	1.11	1.72	.36	1.03	2.09	.40	.74	.16	.69	.05	.31	.05

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1967 - 2001, BY WATER YEAR (WY)
MEAN	26.9	89.5	160	143	211	223	237	142	110	74.2	32.0	25.5
MAX	165	509	902	562	646	927	738	827	501	570	296	408
(WY)	1987	1985	1983	1974	1982	1978	1994	1995	1998	1969	1998	1993
MIN	.23	.34	.42	.31	9.25	6.74	13.4	5.26	.91	1.44	.75	.093
(WY)	1972	1972	1977	1977	1978	1981	2000	1977	1988	1984	1971	1988

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1967 - 2001
ANNUAL TOTAL	54334.7		36136.6
ANNUAL MEAN	148		99.0		122
HIGHEST ANNUAL MEAN					244	1983
LOWEST ANNUAL MEAN					23.1	1980
HIGHEST DAILY MEAN	4500	Jun 25	1170	Nov 11	7740	Apr 12 1979
LOWEST DAILY MEAN	1.0 A	Jan 2	1.5	Aug 20	.00	B
ANNUAL SEVEN-DAY MINIMUM	1.8	Feb 5	1.8	Aug 14	.00	Sep 29 1968
MAXIMUM PEAK FLOW			1360	Feb 26	10600 C	Apr 12 1979
MAXIMUM PEAK STAGE			13.29	Feb 26	17.94 D	May 17 1990
INSTANTANEOUS LOW FLOW			1.3	Aug 19,20
ANNUAL RUNOFF (CFSM)	.96		.64		.79
ANNUAL RUNOFF (INCHES)	13.13		8.73		10.79
10 PERCENT EXCEEDS	368		326		300
50 PERCENT EXCEEDS	23		31		15
90 PERCENT EXCEEDS	3.8		2.4		.79

	A - Estimated, but may have been less during periods of estimated discharges in Jan. and Feb.
	B - Several days in 1967-68, 1973, 1988.
	C - Gage height, 17.52 ft.
	D - Discharge, 9,170 ft³/s.