Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
05458500 Cedar River at Janesville, IA
LOCATION - Lat 42°38'53.94", long 92°27'54.67" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 SE 1/4 sec.35, T.91 N., R.14 W., Bremer County, IA, Hydrologic Unit 07080201, on left bank 300 ft downstream from bridge on County Highway C50 in Janesville, 3.6 mi upstream from West Fork Cedar River, and 182.6 mi upstream from mouth.
DRAINAGE AREA - 1,661 mi².
REVISIONS HISTORY - WSP 1438: Drainage area. WSP 1558: 1906(M), 1915-1916(M), 1917, 1918-1919(M), 1920-1927, 1933-1937(M), 1940-1942(M). WDR IA-97-1: 1996.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records from October 1904 to September 1906, October 1914 to September 1927, October 1932 to September 1942, October 1945 to current year. Prior to May 1946, monthly mean discharge for some periods published in WSP 1308. Prior to October 1906, published as "Red Cedar River at Janesville".
GAGE - Water-stage recorder. Datum of gage is 860.96 ft above North American Vertical Datum of 1988. Prior to July 26, 1919, non-recording gage at site 1,000 ft downstream at datum 4.0 ft lower; July 26, 1919, to September 30, 1927, November 14, 1932, to September 30, 1942, and April 26, 1946, to November 10, 1949, non-recording gage at county bridge 300 ft upstream at same datum.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IA Water Science Center. Minor diurnal fluctuations during periods of low flow due to operations of power plant located 10.0 mi upstream.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of March 17, 1945, reached a stage of 16.2 ft, from high-water mark, at site 300 ft upstream at current datum, discharge 34,300 ft³/s. Flood of March 16, 1929, reached a stage of about 16 ft, from information by city of Waterloo, at current datum, discharge not determined.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1988, 2001-2002, 2004, 2011-2012. Period of record includes water-quality data published in USGS annual reports and various project reports.
