USGS Water-Year Summary 2018
06795500 Shell Creek near Columbus, Nebr.
LOCATION - Lat 41°31'34", long 97°16'54" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.23, T.18 N., R.1 E., Platte County, NE, Hydrologic Unit 10200201, on right bank 10 ft upstream from county road bridge, 1 mi upstream from Loseke Creek, 7 mi northeast of Columbus, and at mile 32.2.
DRAINAGE AREA - 294 mi².
- WDR NE-94-1: Drainage Area.
PERIOD OF RECORD - August 1947 to September 1975, October 1977 to current year.
GAGE - Water-stage recorder with satellite telemetry. Elevation of gage is 1,435 ft above National Geodetic Vertical Datum of 1929, from topographic map.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 2, 1947, reached a stage of 21.7 ft, from floodmark, discharge, 4,600 ft³/s. According to local residents, this was the highest occurrence since 1912.
EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, 11,200 ft³/s, May 30, 2008, gage height, 22.06 ft. Maximum peak stage, 22.76 ft, June 17, 1990, discharge, 8,000 ft³/s.
PERIOD OF RECORD - Water years 1974-1975, 1977, 1989-1990, 1992-1995, 2003, 2008 to October 2012, March to October 2014.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: March 2008 to October 2012 (seasonal records only). March 2014 to October 2015(seasonal records only).
SPECIFIC CONDUCTANCE: March 2008 to October 2012 (seasonal records only). March 2014 to October 2015(seasonal records only).
TURBIDITY: March 2008 to October 2012 (seasonal records only). March 2014 to October 2015(seasonal records only).
DISSOLVED OXYGEN: March 2008 to October 2012 (seasonal records only). March 2014 to October 2015(seasonal records only).
INSTRUMENTATION - Seasonal deployment of a continuous water-quality monitor. Measured parameters include water temperature, specific conductance, dissolved oxygen, and turbidity. Turbidity measurements conform to ISO 7027 standards and were made using a Yellow Springs International (YSI) 6136 sensor. Dissolved oxygen measurements were collected using an optical dissolved oxygen sensor.
EXTREMES FOR PERIOD OF RECORD - Extremes computed from approved periods of record, and may have been exceeded during non-measured periods.
WATER TEMPERATURE: Maximum, 33.3°C, July 25, 2012; minimum, 1.4°C, March 21, 2010.
SPECIFIC CONDUCTANCE: Maximum, 996 uS/cm, September 11, 2011; minimum, 119 uS/cm, September 16, 2016.
DISSOLVED OXYGEN: Maximum, 26.1 mg/L, August 29, 2008; minimum, 0.1 mg/L, June 5, 2008.
TURBIDITY: Maximum, >1,000 FNU, sensor limit exceeded numerous times, typically during periods of runoff; minimum, 3.7 FNU, September 19, 2011.