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Water-Year Summary for Site 301057081414800

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00095 Specific cond at 25C(Max.,Mean)  
00480 Salinity(Min.,Max.,Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
301057081414800 ST.JOHNS RVR AB BUCKMAN BRIDGE AT JACKSONVILLE,FL
LOCATION - Lat 30°10'56.85", long 81°41'48.35" referenced to North American Datum of 1983, Clay County, FL, Hydrologic Unit 03080103, on left bank, attached to homeowner's dock with second story/deck, approximately 0.7 mi upstream of Buckman Bridge, and 35 mi upstream from mouth. 
WATER-QUALITY RECORDS
PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: January 2018 to current year.

WATER TEMPERATURE: January 2018 to current year.

SALINITY: January 2018 to current year.

COOPERATION - This gage is monitored in cooperation with the U.S. Army Corps of Engineers.
INSTRUMENTATION - Water quality monitor and data-collection platform.
REMARKS - Extremes for current year and extremes for period of daily record are based on recorded values and may have been exceeded during periods of no record. January 2018 to current year; water temperature, specific conductance, and salinity are published as instantaneous maximum, minimum, and daily mean.
EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 38,200 µS/cm @ 25, May 27, 2023; minimum, 418 µS/cm @ 25 °C, February 7, 2018.

WATER TEMPERATURE: Maximum, 35.2 °C, Aug. 13, 2023; minimum, 8.6 °C, Jan. 18, 2018.

SALINITY: Maximum, 24 ppth, May 27, 2023; minimum, 0.2 ppth, many days.