USGS CD-ROM: Current Year Discharge

05594800 SILVER CREEK NEAR FREEBURG, IL

LOCATION.--Lat 38°24'22", long 89°52'26", in NE¼NE¼ sec.33, T.1 S., R.7 W., St. Clair County, Hydrologic Unit 07140204, on left bank at downstream side of bridge on State Highway 15, 2.2 mi southeast of Freeburg, 4.8 mi northwest of Fayetteville, and at mile 9.6.

DRAINAGE AREA.--464 mi².

PERIOD OF RECORD.--October 1970 to current year. October 1980 to September 1994 (8:00 a.m. gage heights).

REVISED RECORDS.--WDR IL-73-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 381.40 ft above sea level.

REMARKS.--Records good except those for estimated daily discharges, and those for period of Oct. 1-22, which are poor. Gage-height 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	10	19	29	39	121	496	1690	616	121	434	1980	44
2	8.8	17	31	36	104	301	1300	513	96	378	2520	58
3	8.7	16	27	38	91	210	641	653	86	214	2280	67
4	12	18	25	37	81	173	787	479	396	253	1510	58
5	12	19	28	51	76	154	1110	635	1510	184	1220	63

6	11	66	31	149	73	147	1050	443	2410	170	1220	47
7	8.8	178	26	206	71	149	565	355	2650	140	1400	38
8	8.4	102	24	579	68	445	383	335	2030	662	2010	31
9	8.2	56	23	1250	66	1260	296	266	1270	1050	2290	26
10	10	36	26	1240	64	1480	247	236	1130	1120	1560	21

11	11	26	35	1020	73	1680	213	182	1210	384	480	19
12	9.1	22	39	446	137	1640	194	152	1230	279	730	18
13	9.1	21	35	234	170	1170	180	132	1190	375	960	16
14	16	20	30	164	190	450	360	112	1490	167	925	16
15	21	22	26	162	154	305	619	e104	1840	106	379	17

16	16	24	24	219	138	257	1640	e96	2140	88	171	17
17	13	23	24	169	453	320	2110	e88	1960	78	121	19
18	11	20	22	150	1290	1040	3510	80	1670	69	129	27
19	11	19	21	119	1410	1430	3670	73	1290	62	552	30
20	9.6	19	21	92	1550	2520	2690	69	548	58	918	23

21	8.4	18	21	97	1510	4490	1520	73	599	53	977	27
22	8.8	18	30	92	895	4470	441	302	1080	50	531	23
23	9.0	18	65	93	418	4150	301	969	1520	451	174	20
24	14	17	95	95	302	3570	254	1170	2010	907	103	19
25	71	17	413	92	242	2540	217	1400	2090	492	77	16

26	63	16	382	93	208	1490	193	1610	1640	210	62	17
27	73	16	247	102	232	537	206	1480	473	160	51	42
28	65	16	149	137	405	1170	310	1030	192	110	43	52
29	36	15	87	170	---	1430	662	347	149	87	41	53
30	23	18	63	170	---	1620	795	197	406	357	39	35

31	19	---	50	145	---	1680	---	151	---	1140	41	---

TOTAL	614.9	912	2149	7686	10592	42774	28154	14348	36426	10288	25494	959
MEAN	19.8	30.4	69.3	248	378	1380	938	463	1214	332	822	32.0
MAX	73	178	413	1250	1550	4490	3670	1610	2650	1140	2520	67
MIN	8.2	15	21	36	64	147	180	69	86	50	39	16
CFSM	.04	.07	.15	.53	.82	2.97	2.02	1.00	2.62	.72	1.77	.07
IN.	.05	.07	.17	.62	.85	3.43	2.26	1.15	2.92	.82	2.04	.08

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1971 - 1998, BY WATER YEAR (WY)
MEAN	90.0	286	456	399	581	716	734	527	322	136	104	95.9
MAX	506	1543	2380	1438	1954	2390	1771	3579	1214	530	822	1142
(WY)	1987	1994	1983	1974	1982	1978	1979	1995	1998	1981	1998	1993
MIN	2.55	2.21	6.86	3.87	42.3	34.5	45.3	25.4	12.4	12.9	10.7	4.30
(WY)	1972	1972	1977	1977	1978	1981	1981	1976	1988	1976	1971	1983

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1971 - 1998
ANNUAL TOTAL	97457.8		180396.9
ANNUAL MEAN	267		494		369
HIGHEST ANNUAL MEAN					660	1973
LOWEST ANNUAL MEAN					74.6	1976
HIGHEST DAILY MEAN	4250	Mar 2	4490	Mar 21	15000	May 19 1995
LOWEST DAILY MEAN	5.3	Sep 21,22	8.2	Oct 9	.00	A
ANNUAL SEVEN-DAY MINIMUM	8.4	Sep 19	9.2	Oct 7	.75	Sep 15 1983
INSTANTANEOUS PEAK FLOW			4830	Mar 21	15300	May 19 1995
INSTANTANEOUS PEAK STAGE			16.91	Mar 21	25.38	May 19 1995
INSTANTANEOUS LOW FLOW			7.6	B
ANNUAL RUNOFF (CFSM)	.58		1.07		.80
ANNUAL RUNOFF (INCHES)	7.81		14.46		10.81
10 PERCENT EXCEEDS	728		1510		1050
50 PERCENT EXCEEDS	73		149		73
90 PERCENT EXCEEDS	15		17		8.7

A - Aug. 4-6, 1993, during period of backwater from the Mississippi River. Minimum daily discharge unaffected by backwater, 0.41 ft³/s, Sept. 17, 1983.
B - Oct. 3, 8-9.