USGS Water-Year Summary 2021
06775900 Dismal River near Thedford, Nebr.
LOCATION - Lat 41°46'43", long 100°31'31" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 sec.23, T.21 N., R.28 W., Thomas County, NE, Hydrologic Unit 10210002, on right bank 1,400 ft downstream from bridge on U.S. Highway 83, 2 mi upstream from boundary of Nebraska National Forest (Bessey Division), 14 mi South of Thedford, and at mile 32.9.
DRAINAGE AREA - 966 mi² of which 936 mi² probably is noncontributing.
- WDR NE-94-1: Drainage area.
PERIOD OF RECORD - October 1966 to current year.
GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 2,798.18 ft above North American Vertical Datum of 1988 (NAVD1988). Sept. 24, 2015 to July 8, 2020, datum of gage was 2,800.18 ft above North American Vertical Datum of 1988 (NAVD1988). Jan. 13, 2004 to Sept. 24, 2015, datum of gage was 2,799.13 ft above National Geodetic Vertical Datum of 1929 (NGVD1929); prior to Jan.13, 2004 at datum 2,800.13 ft above NGVD1929.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,160 ft³/s, August 23, 1983, gage height, 3.83 ft, datum then in use. Maximum gage height, 5.10 ft, December 18, 1983, backwater from ice, datum then in use.
PERIOD OF RECORD - Water years 1968-98, 2001-2009, 2012 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2002 to September 2003, March 2012 to current year.
INSTRUMENTATION - Since 2012, an H-377 thermistor temperature probe used to collect water temperature.
EXTREMES FOR PERIOD OF RECORD
- These extremes may have been exceeded during non-measured periods.
WATER TEMPERATURE: Maximum, 26.5°C, July 17, 2003; minimum, 0.0°C,numerous days during winter periods.