USGS Water-Year Summary for Site 06807000

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	Available Parameters
	00010 Temperature, water(Mean)
	00060 Discharge(Mean)
	72213 Turbidity, 90&0-45 d(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)

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

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USGS Water-Year Summary 2023

06807000 Missouri River at Nebraska City, NE

LOCATION - Lat 40°40'54.5", long 95°50'49.5" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 NE 1/4 sec.09, T.8 N., R.14 E., Otoe County, NE, Hydrologic Unit 10240001, on right bank 0.7 mi upstream from bridge on State Highway 2 in Nebraska City, and 562.6 mi upstream from mouth.

DRAINAGE AREA - 410,000 mi².

REVISIONS HISTORY - WSP 761: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Discharge records from August 1929 to current year. Stage-only records collected in this vicinity from August 1878 to December 1899 in reports of Missouri River Commission.

GAGE -

Water-stage recorder.

Datum of gage is 905.61 ft above North American Vertical Datum of 1988 (US Army Corps of Engineers).

Apr. 1, 1963, to July 31, 2016, same site at gage datum 905.36 ft above National Geodetic Vertical Datum of 1929, supplementary adjustment of 1954.

Oct. 22, 1931, to Mar. 31, 1963, water-stage recorder at site 0.7 mi downstream at gage datum 903.94 ft above National Geodetic Vertical Datum of 1929.

Aug. 12, 1929, to Oct. 21, 1931, non-recording gage at site 0.7 mi downstream at gage datum 905.32 ft above National Geodetic Vertical Datum of 1929.

Oct. 31, 1888, to Dec. 31, 1899, non-recording gage at site 0.7 mi downstream at gage datum 412.14 ft above mean sea level (St. Louis directrix).

Aug. 1, 1878, to Oct. 30, 1888, non-recording gage at site 1.2 mi downstream at gage datum 412.14 ft above mean sea level (St. Louis directrix).

REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IA Water Science Center. Flow regulated by upstream main-stem reservoirs. Fort Randall Dam was completed in July 1952, with storage beginning in December 1952. Gavins Point Dam was completed in July 1955, with storage beginning in December 1955.

EXTREMES FOR PERIOD OF RECORD - Minimum daily discharge, 1,800 ft³/s, December 31, 1946; minimum instantaneous gage height, -0.28 ft, December 24, 1960, result of freeze-up.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1951 to current year.

PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in conjunction with suspended-sediment samples, January 1951 to December 1977, October 1991 to September 2010, records fragmentary. Beginning October 2010, daily instantaneous values published with water-quality samples. Daily mean, March 2006 to November 2007.
WATER TEMPERATURE: Daily instantaneous values collected in conjunction with suspended-sediment samples, May 1951 to December 1977, October 1991 to September 2010, records fragmentary. Beginning October 2010, daily instantaneous values published with water-quality samples. Daily mean, March 2006 to November 2007, September 2012 to current year.
DISSOLVED OXYGEN: March 2006 to November 2007.
pH: March 2006 to October 2007.
TURBIDITY: March 2006 to November 2007. October 2014 to current year, records fragmentary.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: August 1957 to December 1959, March to November 1960, March to November 1961, March to November 1962, March to November 1963, March to November 1964, April to December 1965, March 1966 to December 1967, March to December 1968, March 1969 to September 1971, October 1971 to September 1976, October 1991 to current year. Prior to October 1971, suspended-sediment discharge records only, provided by the U.S. Army Corps of Engineers.