LOCATION.-- Lat 43°03'12", long 88°11'41" (NAD of 1927), in NW1/4 SE1/4 sec.24, T.7N., R.19E., Waukesha County, Hydrologic Unit 07120006, on left bank at upstream side of Watertown Road bridge, 3.5 mi northeast of Waukesha.

DRAINAGE AREA.-- 77.4 mi²

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: December 1992 to September 2000 (discontinued).

SURFACE-WATER QUALITY

MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.

BIOLOGICAL

ALGAE: Water year 2000.

BENTHIC MACROINVERTEBRATES: Water year 2000.

FISH: Water year 2001.

HABITAT: Water year 2000-01.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 820 ft above NGVD of 1929 (820 ft NAVD 1988).

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1430 ft³/s, Aug. 8, 1998, gage height, 12.07 ft; minimum discharge, 13 ft³/s, Sept. 16, 1995.

REMARKS FOR CURRENT YEAR.--Fish community samples were collected as part of the National Water-Quality Assessment program (NAWQA) in the upper Illinois River Basin. Taxonomy is based on Robins and others (1991), except where modified for the family Moronidae (Johnson, 1984) and the order Cyprinidontiformes (Parenti, 1981). Collections were made with a single pass of the entire reach with a barge or a backpack electroshocker with supplementary seine hauls and kicks. Fishes were identified in the field by D.J. Sullivan, U.S. Geological Survey, Madison, Wisconsin. Reach A begins 43 feet upstream of Watertown Road and continues upstream for 853 feet.