USGS Water-Year Summary 2020
05464000 Cedar River at Waterloo, IA
LOCATION - Lat 42°29'44", long 92°20'03" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 NW 1/4 sec.25, T.89 N., R.13 W., Black Hawk County, IA, Hydrologic Unit 07080205, on left bank near end of East 7th Street, 0.3 mi upstream from bridge on 11th Street in Waterloo, 1.1 mi downstream from Black Hawk Creek, and 162.3 mi upstream from mouth.
DRAINAGE AREA - 5,146 mi².
- WSP 1438: Drainage area. WSP 1558: 1950.
PERIOD OF RECORD - Discharge records from October 1940 to current year. Prior to April 1941, monthly mean discharge for some periods published in WSP 1308.
GAGE - Water-stage recorder. Datum of gage is 824.14 ft above National Geodetic Vertical Datum of 1929.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of March 16, 1929, reached a stage of about 20.0 ft, determined by U.S. Army Corps of Engineers, from information by city of Waterloo, discharge about 65,000 ft³/s. Flood of April 2, 1933, reached a stage of about 19.5 ft, from information by city of Waterloo, discharge about 61,000 ft³/s.