USGS Water-Year Summary for Site USGS 06768000

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

06768000 Platte River near Overton, Nebr.

LOCATION - Lat 40°40'57", long 99°32'26" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.12, T.8 N., R.20 W., Dawson County, NE, Hydrologic Unit 10200101, on left bank 25 ft upstream from county highway bridge, 4 mi south of Overton, 4 mi downstream from Plum Creek and at river mile 142.

DRAINAGE AREA - 56,300 mi² of which 4,680 mi² probably is noncontributing.

REVISIONS HISTORY - WDR NE-67, WDR NE-94-1: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - July to September 1914 (gage heights only), October 1914 to September 1994, October 1997 to current year. Monthly discharge only for some periods, published in WSP 1310. Published as "near Elm Creek" 1914-15.

GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 2,295.83 ft above National Geodetic Vertical Datum of 1929. July 1914 to October 1917, non-recording gage at site 8 mi downstream at different datum. June 1918 to Sept. 12, 1928, non-recording gage at present site (south channel only) at datum 6.0 ft higher, and Sept. 13, 1928 to Sept. 30, 1930, at datum 4.0 ft higher. Oct. 1, 1930 to Sept. 30, 1968, water-stage recorder, at present site (south channel only), and Oct. 1, 1968 to Feb. 3, 1976, at datum 4.0 ft higher, and Feb. 4 to June 2, 1976, at datum 3.0 ft higher (south channel gage discontinued). Oct. 1, 1968 to July 10, 1974, north channel gage at present site at datum 4.0 ft higher, and July 11, 1974 to June 1, 1976, at datum 3.0 ft higher. June 2, 1976 to Aug. 19, 1984, at site 600 ft downstream at datum 3.0 ft higher, and Aug. 20, 1984 to Oct. 6, 1986, at datum 2.0 ft higher. Oct. 7, 1986 to Sept. 30, 2004, at present site at datum 2.0 ft higher.

EXTREMES FOR PERIOD OF RECORD - Prior to closure of Kingsley Dam in 1941, maximum discharge, 37,600 ft³/s, June 5, 1935, gage height, 6.25 ft, datum then in use, south channel; no flow at times in 1919, 1922, 1925, 1927-28, 1930-41. Since beginning of storage in Lake McConaughy in 1942, maximum peak flow, 22,900 ft³/s, June 28, 1983, gage height, 6.38 ft, site and datum then in use; maximum peak gage height, 9.05 ft, May 25, 2008, discharge 11,200 ft³/s.

WATER-QUALITY RECORDS

INSTRUMENTATION - An H-377 thermistor temperature probe is used to collect water temperature record.

EXTREMES FOR PERIOD OF RECORD -

These extremes may have been exceeded during non monitoring periods.

SPECIFIC CONDUCTANCE: Maximum daily, 1,480 microsiemens May 15, 1966 (south channel); minimum daily, 176 microsiemens June 25, 1989 (south channel).

WATER TEMPERATURES: Maximum, 37.0°C June 13, 1959 (south channel), July 9, 1960 (north channel); minimum, 0.0°C on many days during winter periods.