USGS Water-Year Summary 2020
06478513 JAMES RIVER NEAR YANKTON SD
LOCATION - Lat 42°59'45", long 97°22'10" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.05, T.94 N., R.55 W., Yankton County, SD, Hydrologic Unit 10160011, on left bank at downstream side of county highway bridge, 3.9 mi upstream from Beaver Creek, 17.2 mi upstream from mouth, and 9.0 mi northeast of Yankton.
DRAINAGE AREA - 20,962 mi² of which 2,056 mi² probably is noncontributing.
- WDR SD-11-1: Drainage area.
PERIOD OF RECORD - October 1981 to September 1995 (continuous-record), October 1995 to September 2004 (crest-stage partial record), October 2009 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,154.08 ft above NAVD88. Prior to conversion to NAVD88 datum was published as 1,153.38 ft above NGVD29.