USGS Water-Year Summary for Site 06827500

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

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

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USGS Water-Year Summary 2023

06827500 South Fork Republican River near Benkelman, Nebr.

LOCATION - Lat 40°00'37", long 101°32'31" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 sec.31, T.1 N., R.37 W., Dundy County, NE, Hydrologic Unit 10250003, 1 mi downstream from Kansas-Nebraska State line, 2.5 mi southwest of Benkelman, and 3.4 mi upstream from mouth.

DRAINAGE AREA - 2,740 mi² of which 550 mi² probably is noncontributing.

REVISIONS HISTORY - WSP 1310: 1904-6, 1931. WSP 1390: 1940, 1945, 1947. WSP 1919: 1951-52, 1954-56. WSP 2119: Drainage area. WDR NE-97: 1995 (M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1894 to September 1895, October 1902 to November 1906, October 1930 to September 1932, August 1937 to current year. Published as South Fork of Republican River at Benkelman prior to 1906 and as Republican River at Benkelman 1931-32. Monthly discharge only for some periods, published in WSP 1310.

GAGE - Water-stage recorder with satellite telemetry. Datum of gage 2,990.99 ft above North American Vertical Datum of 1988 (NAVD88). Prior to August 17, 2017 datum of gage was 2,989.91 ft above National Geodetic Vertical Datum of 1929 (NGVD29). Prior to December 10, 1947, non-recording gages at several sites within 3.5 mi of present site at various datums. December 10, 1947 to September 28, 1966, water-stage recorder 170 ft upstream at datum 2,992.91 ft above NGVD29; and September 29, 1966 to March 7, 1968, at site 300 ft upstream at datum 2,992.91 ft above NGVD29. March 8, 1968 to May 29, 1991, at site 300 ft upstream at datum 2,990.91 ft above NGVD29. May 30, 1991 to September 30, 1998, at present site at datum 2,990.91 ft above NGVD29.

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 affected by irrigation development above station. Natural flow was affected by storage in Bonny Reservoir from July 6, 1950 to September 2011.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known since at least 1923, 10.1 ft, May 31, 1935, from floodmark at site 0.26 mi downstream, at datum 2.00 ft higher, discharge 150,000 ft³/s, by slope-area measurement.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 19,600 ft³/s, August 16, 1958, gage height, 8.70 ft, site and datum then in use. Maximum gage height 9.64 ft, July 24, 2020, discharge 5,300 ft³/s. Maximum gage height may have been higher during flood of June 24, 1945.