USGS Water-Year Summary for Site 06796500

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	Available Parameters
	00010 Temperature, water(Max.,Min.)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00630 NO3+NO2, wu(Max.,Min.,Mean)
	63160 Stream level, NAVD88(Mean)
	63680 Turbidity, Form Neph(Min.,Max.,Mean)

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

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USGS Water-Year Summary 2023

06796500 Platte River near Leshara, Nebr.

LOCATION - Lat 41°19'12", long 96°24'14" referenced to North American Datum of 1983, in sec.34, T.16 N., R.9 E., Douglas County, NE, Hydrologic Unit 10200202, on left bank 25 ft downstream from bridge on Nebraska Highway 64, 1.5 mi southeast of Leshara.

DRAINAGE AREA - Not determined.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1994 to current year.

GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 1,144.47 ft above North American Vertical Datum of 1988. Prior to September 26, 2016, datum of gage was 1,143.86 ft above National Geodetic Vertical Datum of 1929. Prior to Oct. 18, 2002, about 200 ft downstream at same datum.

EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, 173,000 ft³/s, March 15, 2019, estimate based on rating curve extension above 84,490 ft³/s, gage height, 11.47 ft. Maximum peak stage, 11.84 ft, February 9, 1996, backwater from ice.

WATER-QUALITY RECORDS

INSTRUMENTATION -

Seasonal deployment of a continuous water-quality monitor. Measured parameters include water temperature, specific conductance, dissolved oxygen, turbidity, and nitrate. Turbidity measurements conform to ISO 7027 standards. Dissolved oxygen measurements were collected using a luminescent sensor. Nitrate measurements were collected using a Hach Nitratax sensor with 2 mm wavelength sensing.

YSI Exo probes used at this site include:

Wiped Conductance probe (USGS Parameter Code 00095, method code SC001).

Dissolved Oxygen probe (USGS Parameter Code 00300, method code LUMIN).

Turbidity probe (USGS Parameter Code 63680, YSI Exo2-method code TS213).

EXTREMES FOR PERIOD OF RECORD -

These extremes may have been exceeded during non-measured portions of the record.

WATER TEMPERATURES: Maximum, 37.6°C, July 28, 2023; minimum, 0.0°C,multiple occurrences

SPECIFIC CONDUCTANCE: Maximum, 865 uS/cm, May 23, 2016; minimum, 187 uS/cm, August 7, 2017.

DISSOLVED OXYGEN: Maximum, 15.9 mg/L, April 30, 2020; minimum, 4.0 mg/L, July 22, 2017.

TURBIDITY: 2016 to the present, a YSI EXO was used. (USGS Parameter Code 63680, method code TS213).

Maximum, 1960 FNU, May 01, 2022; minimum, 7.4 FNU, April 21, 2022.

NITRATE CONCENTRATION: Maximum, 5.42 mg/L as NOx, May 26, 2020; minimum, <0.50 mg/L as N, many days.