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Water-Year Summary for Site USGS 06770500

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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.
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Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2020: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2020
06770500 Platte River near Grand Island, Nebr.
LOCATION - Lat 40°52'28", long 98°16'54" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.31, T.11 N., R.8 W., Merrick County, NE, Hydrologic Unit 10200101, 5.2 mi southeast of Grand Island, and at mile 70.0.
DRAINAGE AREA - 57,650 mi² of which 4,710 mi² probably is noncontributing.
REVISIONS HISTORY - WSP 956: 1935. WSP 1390: 1942. WDR NE-94-1: Drainage area.
PERIOD OF RECORD - October 1933 to current year.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 1,829.90 ft above National Geodetic Vertical Datum of 1929 (Nebraska Department of Highway's benchmark). Prior to Oct.23, 1933, nonrecording gage at bridge 68 ft downstream at datum 2.00 ft higher, and Oct. 23, 1933 to Aug. 19, 1980, water-stage recorder at site 90 ft downstream at datum 2.00 ft higher. Aug. 19, 1980 to Aug. 22, 2002, at present site at datum 2.00 ft higher.
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. Natural flow of stream affected by transmountain diversions, storage reservoirs, power developments, groundwater withdrawals and diversions for irrigation, and return flow from irrigated areas.
EXTREMES FOR PERIOD OF RECORD - Prior to closure of Kingsley Dam in 1941, maximum discharge, 30,000 ft³/s, June 6, 1935, gage height, 5.99 ft, datum then in use, from rating curve extended above 18,000 ft³/s; no flow at times during 1934-41. Since beginning of storage in Lake McConaughy in 1942, maximum peak flow, 23,900 ft³/s, June 30, 1983, gage height, 5.97 ft, datum then in use. Maximum peak gage height 7.79 ft, January 21, 2016.