USGS Water-Year Summary 2021
06921600 South Grand River at Urich, MO
LOCATION - Lat 38°27'08", long 94°00'15" referenced to North American Datum of 1927, in sec.10, T.42 N., R.28 W., Henry County, MO, Hydrologic Unit 10290108,
DRAINAGE AREA - 670 mi².
PERIOD OF RECORD - Jul 23, 2014 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 716.88 ft. above North American Vertical Datum of 1988.