USGS Water-Year Summary 2021
06781600 South Loup River at Arnold, Nebr.
LOCATION - Lat 41°25'22.00", long 100°12'12.16" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.21, T.17 N., R.25 W., Custer County, NE, Hydrologic Unit 10210004, on upstream side of State Highway 92 bridge, 0.5 mi west of Arnold.
DRAINAGE AREA - Not determined.
PERIOD OF RECORD - April 2010 to current year.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 2,686.22 ft above North American Vertical Datum of 1988. Prior to September 26, 2014, datum of gage was 2,685.04 ft above National Geodetic Vertical Datum of 1929.
EXTREMES FOR PERIOD OF RECORD - Maximum peak flow 1,430 ft³/s, March 13, 2019, 9.92 ft.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 30.3°C, July 22, 2016; minimum, 0.1°C, several days during winter period. These extremes may have been exceeded during non-measured periods.