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Status: Superseded (Apr 17 2003) (Accepted Nov 4 1999)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW1.41Mean Higher-High Water
MHW1.32Mean High Water
MTL0.83Mean Tide Level
MSL0.84Mean Sea Level
DTL0.71Mean Diurnal Tide Level
MLW0.35Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-4.35Station Datum
GT1.41Great Diurnal Range
MN0.97Mean Range of Tide
DHQ0.10Mean Diurnal High Water Inequality
DLQ0.34Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide13.55Highest Observed Tide
Max Tide Date & Time09/08/1900 00:00Highest Observed Tide Date & Time
Min Tide-6.25Lowest Observed Tide
Min Tide Date & Time01/11/1908 04:00Lowest Observed Tide Date & Time
HAT2.16Highest Astronomical Tide
HAT Date & Time10/28/2007 00:42HAT Date and Time
LAT-1.21Lowest Astronomical Tide
LAT Date & Time01/10/2005 15:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1990 - 12/31/1994




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