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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
06797500 Elkhorn River at Ewing, Nebr.
LOCATION - Lat 42°16'06.4", long 98°20'21.7" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 sec.35, T.27 N., R.9 W., Holt County, NE, Hydrologic Unit 10220001, on left bank, 10 ft downstream from bridge on State Highway L-45B, 0.8 mi north of Ewing, 1.5 mi upstream from South Fork Elkhorn River, and at mile 199.
DRAINAGE AREA - 1,400 mi² of which 660 mi² probably is noncontributing.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1947 to current year.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 1,836.24 ft above sea level, levels by Nebraska Department of Roads. From Aug. 1, 1947 to Oct. 22, 1952, at site 300 ft upstream at same datum. From Oct. 23, 1952 to Sept. 30, 1996, at site 500 ft downstream at same datum.
REMARKS - Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water years 2014 onward, records good except for estimated daily discharges, which are poor, unless otherwise noted.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum gage height known, 11.32 ft, June 23-24, 1947, from floodmark at site 300 ft upstream, discharge, 6,600 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, 27,300 ft³/s, June 14, 2010, gage height, 13.26 ft.
