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    ALL DATA ARE EASTERN STANDARD TIME

    USGS 01311145 EAST ROCKAWAY INLET AT ATLANTIC BEACH NY

    PROVISIONAL DATA SUBJECT TO REVISION

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    This station is operated in cooperation with:
       NYS Department of Environmental Conservation


    LOCATION.--Lat 40°35'35", long 73°44'16" referenced to North American Datum of 1927, Nassau County, NY, Hydrologic Unit 02030202, at Nassau County Bridge Authority Atlantic Beach Bridge, in Atlantic Beach.
    PERIOD OF RECORD.--August 2002 to current year. November 1972 to October 1998, in files of Town of Hempstead Department of Conservation & Waterways.
    GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929. November 1972 to September 1989, water-stage recorder at site 900 ft west. October 1990 to October 1998, water-stage recorder at site 300 ft south.
    REMARKS.--Records excellent, except those for Jan. 26 to Feb. 24, Apr. 7-9, and Apr. 12 to May 5, which are good; and those for Feb. 25 to Apr. 6 and Apr. 10-11, which are fair. Satellite and telephone elevation telemeter at station.
    EXTREMES FOR PERIOD OF RECORD.--Maximum elevation, 5.91 ft, Mar. 13, 2010; minimum, -4.77 ft, Mar. 9, 2005.
    EXTREMES OUTSIDE PERIOD OF RECORD.--Storm tides of Dec. 11, 1992, and Oct. 31, 1991, reached elevations of 7.7 and 6.7 ft, respectively, from information provided by Town of Hempstead Department of Conservation & Waterways. Minimum elevation recorded, -5.0 ft, Jan. 10, 1978, from information provided by Town of Hempstead Department of Conservation & Waterways.
    EXTREMES FOR CURRENT YEAR.--Maximum elevation, 5.91 ft, Mar. 13; minimum, -3.92 ft, Jan. 30.
    Derived from NY Annual Water-Data Report 2010

    Peak Flow and Stage Information

    Station Picture

    Elevation (observed) and tide elevation (predicted) for this station are reported to NGVD 1929. To convert data to NAVD 1988 subtract 1.10 ft. To convert data to MLLW datum add 1.50 ft. These corrections vary from site to site.

    NGVD 1929 is the National Geodetic Vertical Datum of 1929, formerly called "mean sea level" or "Sea Level Datum of 1929." NGVD 1929 was a general adjustment of the first-order level nets fit to mean sea level at 26 tide gages in the US and Canada.
    NAVD 1988 is the North American Vertical Datum of 1988, which is a geodetic datum derived from a general adjustment of the first-order level nets fit to 1 tide gage in eastern Canada.
    MLLW is mean lower low water, which is a site-specific datum determined by averaging the lowest of the 2 low tides that occur each day over a 19-year tidal epoch. For tide gages with less than 19 years of record, this datum is estimated by correlation with long-term tide gages.

    Additional sensor graph(s) available (click on graph or sensor name)

    Water elevation, astronomical-tide elevation, and residual water level

    Water elevation, astronomical-tide elevation, and residual water level Graph updated every 15 minutes

    Alternate link to graph

    This station managed by the NY Water Science Center, Coram Program Office.

    Available Parameters Available Period
    All 2 Available Parameters for this site
      
    62619 Est/ocean elev, NGVD 2007-10-01  2014-08-30
    62619 Est/ocean elev, NGVD, tidal prediction 2014-05-02  2014-08-31

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    Summary of all available data for this site
    Instantaneous-data availability statement


    Estuary or ocean water surface elevation above NGVD 1929, feet

    Most recent instantaneous value: 2.42   08-30-2014  21:00 EST
    Graph of  Estuary or ocean water surface elevation above NGVD 1929, feet

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    Estuary or ocean water surface elevation above NGVD 1929, feet, tidal prediction

    Most recent instantaneous value: 2.35   08-31-2014  23:54 EST
    Graph of  Estuary or ocean water surface elevation above NGVD 1929, feet, tidal prediction

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