USGS Water-Year Summary 2020
05481650 Des Moines River near Saylorville, IA
LOCATION - Lat 41°40'50", long 93°40'05" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 NE 1/4 sec.05, T.79 N., R.24 W., Polk County, IA, Hydrologic Unit 07100004, on left bank 5 ft upstream from Fisher Bridge on County Highway R6F, 2.0 mi west of Saylorville, 2.1 mi downstream from Rock Creek, 2.3 mi downstream from Saylorville Dam, 2.2 mi upstream from Beaver Creek, and 203.0 mi upstream from mouth.
DRAINAGE AREA - 5,841 mi².
PERIOD OF RECORD - Discharge records from October 1961 to current year.
GAGE - Water-stage recorder. Datum of gage is 787.42 ft above National Geodetic Vertical Datum of 1929 (levels by U.S. Army Corps of Engineers). Prior to August 6, 1970, non-recording gage at same site and datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Since at least 1893, no flood outside the period of record exceeded the June 24, 1954, stage of 24.50 ft, from high-water mark, discharge 60,000 ft³/s.
PERIOD OF RECORD - Water years 1962-2004.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in conjunction with suspended-sediment samples, December 1967 to September 2004, records fragmentary.
WATER TEMPERATURE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1961 to September 2004, records fragmentary.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: October 1961 to September 2004.