USGS Water-Year Summary for Site 06887000

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	Available Parameters
	00010 Temperature, water(Mean) [(2)]
	00060 Discharge(Mean)
	00065 Gage height(Mean)

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

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USGS Water-Year Summary 2023

06887000 BIG BLUE RIVER NEAR MANHATTAN, KS

LOCATION - Lat 39°14'14", long 96°34'16" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 NE 1/4 sec.30, T.9 S., R.8 E., Riley County, KS, Hydrologic Unit 10270205, on right bank at downstream side of county highway bridge, 2.5 mi downstream from Tuttle Creek Dam, 4.0 mi north of Manhattan, and at mile 7.5.

DRAINAGE AREA - 9,640 mi².

REVISIONS HISTORY - WDR 93-1:1933(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - May to July 1951 (published in WSP 1139), October 1954 to current year. Records for April 1895 to October 1905, published in previous Annual Reports and Water-Supply Papers, have been found to be unreliable and should not be used.

GAGE - Water-stage recorders. Datum of gage is 989.25 NAVD88. May 1 to July 31, 1951, nonrecording gage above power dam 1.1 mi upstream at datum 8.34 ft higher. Oct. 1 to Nov. 17, 1954, nonrecording gage and Nov. 18, 1954, to Sept. 30, 1974, recording gage at present site and datum 3.00 ft higher.

REMARKS - Flow regulated since 1962 by Tuttle Creek Lake (station 06886900), 2.5 mi upstream. Discharge may, at times, be affected by backwater from the Kansas River. Satellite telemeter at station.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of May 31, 1903, reached a stage of 38.85 ft, and flood in June 1941 reached a stage of about 37.1 ft, from floodmarks and information by local resident.

WATER-QUALITY RECORDS

PERIOD OF RECORD - April 2009 to April 2011 (discontinued).

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: April 2009 to April 2011 (discontinued). WATER TEMPERATURE: April 2009 to April 2011 (discontinued). TURBIDITY (YSI 6136 sensor): April 2009 to April 2011 (discontinued).

INSTRUMENTATION - Multiparameter water-quality monitor.

REMARKS - Records good. Interruptions in record are due to ice conditions or malfunction of the recording instrument or sensors. Instruments used to measure turbidity conform to ISO 7027 standards and were made using Yellow Springs Instrument (YSI) 6136 sensor.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 747 microsiemens/cm, Feb. 8, 2011; minimum, 344 microsiemens/cm, Aug. 11, 2010. WATER TEMPERATURE: Maximum, 30.9°C, June 28, 2010; minimum, 0.0°C, Dec. 27, 2009. TURBIDITY (YSI 6136 sensor): Maximum, 790 FNU, June 16, 2010; minimum, 1.3 FNU, Jan. 17, 2011.