USGS Water-Year Summary 2020
04087204 OAK CREEK AT SOUTH MILWAUKEE, WI
LOCATION - Lat 42°55'30", long 87°52'12" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 sec.2, T.5 N., R.22 E., Milwaukee County, WI, Hydrologic Unit 04040002, on left bank 25 ft downstream from 15th Avenue bridge in South Milwaukee and 2.8 mi upstream from mouth.
DRAINAGE AREA - 25 mi².
- WDR WI-80-1: 1979 (average discharge).
PERIOD OF RECORD - October 1963 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 631.13 ft, NAVD of 1988.
PERIOD OF RECORD - May 2011 to September 2011 (discontinued).
PERIOD OF DAILY RECORD - WATER TEMPERATURE: May 2011 to September 2011 (discontinued).
SPECIFIC CONDUCTANCE: May 2011 to September 2011 (discontinued).
DISSOLVED OXYGEN: May 2011 to September 2011 (discontinued).
INSTRUMENTATION - Continuous water quality monitor with water temperature, specific conductivity and dissolved oxygen sensors: May 2011 to September 2011 (discontinued).
EXTREMES FOR CURRENT YEAR - WATER TEMPERATURE: Maximum observed, 25.8°C, July 21; minimum observed, 7.7°C, May 16.
SPECIFIC CONDUCTANCE: Maximum observed, 1,540 uS/cm, May 22; minimum observed, 92 uS/cm, Sept. 24.
DISSOLVED OXYGEN: Maximum observed, 17.1 mg/L, May 20; minimum observed, 2.0 mg/L, Aug.3.