USGS Water-Year Summary 2020
06600500 Floyd River at James, IA
LOCATION - Lat 42°34'36", long 96°18'40" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 SW 1/4 sec.29, T.90 N., R.46 W., Plymouth County, IA, Hydrologic Unit 10230002, on left bank on upstream side of bridge on County Highway C70, 0.2 mi east of James, 14.3 mi downstream from West Branch Floyd River, and 8.9 mi upstream from mouth.
DRAINAGE AREA - 886 mi².
- WSP 1240: 1935(M), 1936, 1937-1938(M), 1942, 1945. WSP 1440: Drainage area.
PERIOD OF RECORD - Discharge records from December 1934 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,092.59 ft above National Geodetic Vertical Datum of 1929. Prior to September 11, 1938, June 9 to November 15, 1953, and October 1, 1955, to May 22, 1957, non-recording gage at same site at datum 10.0 ft higher; May 23, 1957, to September 30, 1970, water-stage recorder at same site at datum 10.0 ft higher.
EXTREMES OUTSIDE PERIOD OF RECORD - Since at least 1892, no flood outside the period of record exceeded the June 8, 1953, stage of 25.30 ft, discharge 71,500 ft³/s, from information by U.S. Army Corps of Engineers.
PERIOD OF RECORD - Water year 2012.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1968 to September 1973.
WATER TEMPERATURE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1968 to September 1973.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: March 1954 to April 1957, October 1968 to September 1973. Prior to October 1968, suspended-sediment discharge records only, provided by U.S. Army Corps of Engineers.