LOCATION.-- Lat 42°30'40", long 88°10'45" (NAD of 1927), in SE1/4SW1/4 sec.30, T.1 N., R.20 E., Kenosha County, Hydrologic Unit 07120006, on right bank 100 ft downstream from bridge on County Trunk Highway C, 300 ft upstream from Wilmot Dam, 1.0 mi north of Wisconsin-Illinois State line, 6.0 mi upstream from Fox Chain of Lakes, and at mile 116.6.

DRAINAGE AREA.-- 868 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1939 to September 1993. October 1993 to November 1997 (published as "near New Munster, WI"). December 1997 to August 1999 (discontinued).

STAGE: December 1997 to August 1999.

SURFACE-WATER QUALITY

SEDIMENT: Dec. 1997 to May 1999.

MISCELLANEOUS: Sediment concentration and particle size, water years 1998-99.

REVISED RECORDS.-- WSP 1308: 1943 (M), 1945 (M). WDR WI-67-1: Drainage area. WDR WI-92-1: 1991.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 735.22 ft above NGVD of 1929 (734.98 ft NAVD 1988). Prior to Sept. 1, 1965, nonrecording gage at bridge 100 ft upstream at same datum. Concrete dam until September 15, 1992.

REMARKS.-- Suspended-sediment samples were collected twice weekly with more frequent samples collected during high runoff periods.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,520 ft³/s, Mar. 31, 1960, gage height, 9.25 ft; No flow, Oct. 26, 1945 and Aug. 10, 1990.

SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily, 205 mg/L, April 24, 1999; minimum daily, 13 mg/L, Dec. 17, 1998, March 4-5, 1999.

SUSPENDED-SEDIMENT LOAD: Maximum daily, 1,160 tons, April 24, 1999; minimum daily, 13 tons, Sept. 25, 1998.