USGS Water-Year Summary 2021
05427085 ROCK RIVER AT ROBERT STREET AT FORT ATKINSON, WI
LOCATION - Lat 42°55'39", long 88°50'34" referenced to North American Datum of 1983, in SW 1/4 NE 1/4 sec.4, T.5 N., R.14 E., Jefferson County, WI, Hydrologic Unit 07090001, on upstream center of Robert Street bridge at Fort Atkinson.
DRAINAGE AREA - 2,240 mi².
PERIOD OF RECORD - October 1998 to current year.
GAGE - Water-stage recorder. Side looking velocity meter system. Datum of gage is 764.87 ft above NAVD of 1988 (levels by the City of Fort Atkinson). Prior to Oct. 1, 2012, datum was 10.00 ft. higher.