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Datums for 8771450, Galveston Pier 21 TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8771450, Galveston Pier 21, TX
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.41Mean Higher-High Water
MHW1.32Mean High Water
MTL0.82Mean Tide Level
MSL0.83Mean Sea Level
DTL0.71Mean Diurnal Tide Level
MLW0.30Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.14North American Vertical Datum of 1988
STND-4.38Station Datum
GT1.41Great Diurnal Range
MN1.02Mean Range of Tide
DHQ0.09Mean Diurnal High Water Inequality
DLQ0.30Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide13.52Highest Observed Tide
Max Tide Date & Time09/08/1900 00:00Highest Observed Tide Date & Time
Min Tide-6.28Lowest Observed Tide
Min Tide Date & Time01/11/1908 04:00Lowest Observed Tide Date & Time
HAT2.14Highest Astronomical Tide
HAT Date & Time10/17/1989 00:48HAT Date and Time
LAT-1.19Lowest Astronomical Tide
LAT Date & Time12/31/1986 15:54LAT Date and Time
Tidal Datum Analysis Periods
01/01/1997 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8771450 Galveston Pier 21, TX

Revised: 08/08/2018
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