05548500 DATA: Discharge Tables, 1999

Station list Available data
ILLINOIS RIVER BASIN

05548500 FOX RIVER AT JOHNSBURG, IL

LOCATION.--Lat 42°22'35", long 88°14'15", in SW1/4SW1/4 sec.18, T.45 N., R.9 E., McHenry County, Hydrologic Unit 07120006, on left bank at upstream side of bridge on Chapel Hill Road in Johnsburg, 5.5 mi upstream from McHenry Dam, and at mile 103.0.

DRAINAGE AREA.--1,205 mi².

PERIOD OF RECORD.--December 1997 to August 1999 (discontinued). October 1939 to current year (gage heights only).

GAGE.--Water-stage recorder and acoustical-velocity meter. Datum of gage is 733.00 ft above sea level (levels by Illinois Department of Transportation). Oct. 1, 1939 to Dec. 14, 1939, nonrecording gage at same site at datum 2.16 ft higher. Dec. 14, 1939, to Sept. 30, 1971, at datum 2.16 ft higher.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Stage regulated by Stratton Lock and Dam, 5.5 mi downstream from station (previously known as McHenry Dam). Gage-height telemeter at station.

EXTREMES FOR PERIOD OF RECORD.--Maximum recorded discharge, 4,780 ft³/s, June 17, 1999, gage height, 5.91 ft; maximum gage height, 7.55 ft, present datum, April 6, 1960, discharge unknown; minimum recorded discharge, -1,300 ft³/s, June 25, 1998.

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	254	706	694	509	2590	1290	558	3230	1280	1270	686	---
2	244	853	750	468	2600	1150	593	3120	1490	1140	533	---
3	276	742	669	552	2550	1160	682	2970	1780	903	421	---
4	364	668	652	574	2670	1060	690	2860	1760	850	365	---
5	532	634	638	573	2680	1030	749	2500	1720	836	361	---

6	736	630	644	566	2710	1030	528	2100	1630	884	372	---
7	904	641	745	576	2700	e1000	681	1920	1270	821	322	---
8	959	644	922	576	2580	e1000	837	1740	1230	729	449	---
9	938	647	927	568	2550	e990	1210	1760	1100	677	328	---
10	946	328	960	569	2480	986	1470	1720	901	684	354	---

11	926	1690	924	579	2220	976	1700	1670	995	654	351	---
12	708	1700	960	576	2460	983	1710	1650	1450	497	338	---
13	474	1830	955	579	2570	994	1720	1630	1850	426	374	---
14	443	1800	894	584	2510	999	1690	1580	3340	389	415	---
15	351	1770	953	612	2510	929	1680	1550	3980	354	400	---

16	349	1770	924	605	2470	781	1870	1550	4460	390	363	---
17	347	1730	912	600	2450	573	1890	1490	4610	412	---	---
18	780	1670	884	541	2420	792	1900	1760	4530	468	---	---
19	1210	1600	942	500	2360	914	1660	2040	4340	481	---	---
20	1330	1630	900	647	2290	1070	1450	2130	4090	515	---	---

21	1350	1400	753	705	2180	1110	1460	2200	3820	562	---	---
22	1270	1190	615	870	2060	1080	1730	2260	3550	575	---	---
23	1030	1100	691	1300	1730	1060	2390	2200	3290	608	---	---
24	884	922	675	1590	1430	1130	2980	2200	3080	700	---	---
25	771	908	651	1850	1420	1120	3270	2140	2860	723	---	---

26	614	910	687	1940	1410	1070	3470	2110	2510	739	---	---
27	564	901	658	2100	1400	1010	3550	2040	2080	808	---	---
28	572	844	647	2360	1370	891	3640	1950	1760	780	---	---
29	556	722	593	2460	---	765	3630	1740	1700	671	---	---
30	557	827	506	2530	---	559	3470	1710	1590	695	---	---

31	568	---	481	2590	---	573	---	1530	---	634	---	---

TOTAL	21807	33407	23806	31649	63370	30075	54858	63050	74046	20875	---	---
MEAN	703	1114	768	1021	2263	970	1829	2034	2468	673	---	---
MAX	1350	1830	960	2590	2710	1290	3640	3230	4610	1270	---	---
MIN	244	328	481	468	1370	559	528	1490	901	354	---	---
CFSM	.58	.92	.64	.85	1.88	.81	1.52	1.69	2.05	.56	---	---
IN.	.67	1.03	.73	.98	1.96	.93	1.69	1.95	2.29	.64	---	---

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1997 - 1999, BY WATER YEAR (WY)
MEAN	703	1114	676	1052	1879	1071	1995	1716	1635	744	717	387
MAX	703	1114	768	1082	2263	1173	2161	2034	2468	815	717	387
(WY)	1999	1999	1999	1998	1999	1998	1998	1999	1999	1998	1998	1998
MIN	703	1114	584	1021	1496	970	1829	1397	802	673	717	387
(WY)	1999	1999	1998	1999	1998	1999	1999	1998	1998	1999	1998	1998

SUMMARY STATISTICS	FOR 1998 CALENDAR YEAR
ANNUAL TOTAL	382131
ANNUAL MEAN	1047
HIGHEST DAILY MEAN	2560	Apr 19
LOWEST DAILY MEAN	239	Jul 21
ANNUAL SEVEN-DAY MINIMUM	276	Sep 26
INSTANTANEOUS PEAK FLOW
INSTANTANEOUS PEAK STAGE
INSTANTANEOUS LOW FLOW
ANNUAL RUNOFF (CFSM)	.87
ANNUAL RUNOFF (INCHES)	11.80
10 PERCENT EXCEEDS	1900
50 PERCENT EXCEEDS	924
90 PERCENT EXCEEDS	366