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Datums for 8638610, Sewells Point VA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8638610, Sewells Point, VA
Status: Accepted (Jul 25 2013)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW2.76Mean Higher-High Water
MHW2.56Mean High Water
MTL1.34Mean Tide Level
MSL1.36Mean Sea Level
DTL1.38Mean Diurnal Tide Level
MLW0.13Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.61North American Vertical Datum of 1988
STND-4.38Station Datum
GT2.76Great Diurnal Range
MN2.43Mean Range of Tide
DHQ0.20Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWI1.55Greenwich High Water Interval (in hours)
LWI7.83Greenwich Low Water Interval (in hours)
Max Tide3.64Highest Observed Tide
Max Tide Date & Time08/23/1933 09:18Highest Observed Tide Date & Time
Min Tide-7.96Lowest Observed Tide
Min Tide Date & Time01/31/1966 15:00Lowest Observed Tide Date & Time
HAT3.63Highest Astronomical Tide
HAT Date & Time10/16/1993 14:12HAT Date and Time
LAT-0.72Lowest Astronomical Tide
LAT Date & Time01/21/1996 08:12LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 8638610 Sewells Point, VA

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services