USGS Water-Year Summary 2021
05421740 Wapsipinicon River near Anamosa, IA
LOCATION - Lat 42°05'00", long 91°16'02" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 SW 1/4 sec.13, T.84 N., R.4 W., Jones County, IA, Hydrologic Unit 07080103, on left bank 6 ft upstream from bridge on Shaw Road, 2.2 mi downstream from dam in Anamosa, 1.1 mi downstream from mouth of Dutch Creek and Fawn Creek, and 92.7 mi upstream from mouth.
DRAINAGE AREA - 1,575 mi².
PERIOD OF RECORD - Discharge records from July 2002 to current year.
GAGE - Water-stage recorder. Datum of gage is 755.00 ft above National Geodetic Vertical Datum of 1929.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 21, 1968, discharge about 20,000 ft³/s, gage height 22.90 ft. Flood of May 18, 1999, gage height and discharge not determined.
PERIOD OF RECORD - Water years 2008, 2012.