USGS Water-Year Summary for Site 06465500

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	Available Parameters
	00010 Temperature, water(Mean,Min.,Max.)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

06465500 Niobrara River near Verdel, Nebr.

LOCATION - Lat 42°44'23", long 98°13'22" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 sec.23, T.32 N., R.8 W., Knox County, NE, Hydrologic Unit 10150007, on right bank at downstream side of county road bridge, 6.6 mi south of Verdel, 7.5 mi upstream from Verdigre Creek, and at mile 14.8.

DRAINAGE AREA - 11,580 mi².

REVISIONS HISTORY - WDR NE-94-1: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1938 to May 1940, June 1958 to current year.

GAGE - Water-stage recorder with satellite telemetry. Datum of gage is 1,312.12 ft above sea level. Apr. 25, 1938 to June 16, 1939, non-recording gage at site 2,600 ft downstream; June 17, 1939 to June 13, 1940, non-recording gage 2,850 ft downstream; and June 14, 1958 to July 24, 1985, water-stage recorder at site 2,600 ft downstream, all at datum 4.00 ft lower.

REMARKS - Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water years 2014 onward, records fair to poor because of the difficulty of determining bed regime changes; except for estimated daily discharges, which are poor, unless otherwise noted. Natural flow of stream affected by irrigation and power developments.

EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, 123,000 ft³/s, gage height, 19.38 ft, March 14, 2019, from rating curve extension above 41,670 ft³/s based on indirect measurement.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2010 to current year. SPECIFIC CONDUCTANCE: March, 2014 to November, 2014. pH: March, 2014 to November, 2014. DISSOLVED OXYGEN: March, 2014 to November, 2014.

INSTRUMENTATION - Continuous water temperature monitor. Water temperature measurements were collected using a Hach H377C water temperature probe.

REMARKS - Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water year 2014, the water temperature and dissolved oxygen records were rated as excellent; the specific conductance and pH records were rated as good.

EXTREMES FOR PERIOD OF RECORD -

These extremes may have been exceeded during non-measured periods.

WATER TEMPERATURE: Maximum, 36.3°C, July 19, 2017; minimum, 0.0°C, several days during winter period.

SPECIFIC CONDUCTANCE: Maximum, 473 uS/cm, May 6, 2020; minimum, 182 uS/cm, August 6, 2014.

DISSOLVED OXYGEN: Maximum, 14.9 mg/L, November 12, 2014; minimum, 6.1 mg/L, August 20, 2017.

pH: Maximum, 9.2 standard units, June 20, 2020; minimum, 7.7 standard units, August 6, 2014