USGS Water-Year Summary 2020
06809210 East Nishnabotna River near Atlantic, IA
LOCATION - Lat 41°20'46", long 95°04'36" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 NW 1/4 sec.35, T.76 N., R.37 W., Cass County, IA, Hydrologic Unit 10240003, on left bank on downstream side of bridge on Lansing Road, 5.2 mi southwest of intersection of U.S. Highway 6 and State Highway 83 in Atlantic, 1.6 mi upstream from Turkey Creek, 74.3 mi upstream from confluence with West Nishnabotna River, and 89.9 mi upstream from mouth of Nishnabotna River.
DRAINAGE AREA - 436 mi².
PERIOD OF RECORD - Discharge records from October 1960 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,105.83 ft above National Geodetic Vertical Datum of 1929. Prior to October 1, 1970, at site 2.2 mi upstream at datum 5.00 ft higher.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of July 2, 1958, reached a stage of 22.49 ft, from high-water mark, discharge 34,200 ft³/s.