USGS Water-Year Summary 2019
06815000 Big Nemaha River at Falls City, Nebr.
LOCATION - Lat 40°02'08", long 95°35'45" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.22, T.1 N., R.16 E., Richardson County, NE, Hydrologic Unit 10240008, on right bank near upstream side of bridge on U.S. Highway 73, 1 mi south of Falls City and 14.5 mi upstream from mouth.
DRAINAGE AREA - 1,339 mi².
- WSP 1086: Drainage area.
PERIOD OF RECORD - March 1944 to current year. Prior to October 1967, published as Nemaha River at Falls City.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 858.24 ft above sea level. Prior to Oct. 16, 1952, non-recording gage; and Oct. 17, 1952 to Aug. 24, 1982, water-stage recorder for stages above 6.1 ft at site 150 ft downstream at datum 3.0 ft higher. Aug. 25, 1982 to Sept. 30, 1997, at present site at datum 3.0 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, 71,600 ft³/s, October 11, 1973, gage height, 31.40 ft, datum then in use.