Station list
05548500 FOX RIVER AT JOHNSBURG, IL
LOCATION.--Lat 42�22'35", long 88�14'15", in SW¼SW¼ 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.
PERIOD OF RECORD.--October 1939 to current year (gage heights only).
GAGE.--Water-stage recorder. 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.
EXTREMES FOR PERIOD OF RECORD.--Maximum gage height, 7.55 ft, present datum, Apr. 6, 1960; minimum, 1.43 ft,
present datum, Mar. 9, 1967.
EXTREMES FOR CURRENT YEAR.--Maximum gage height, 4.84 ft, Apr. 21; minimum, 2.20 ft, Mar. 13.