Datums for 8770625, UMBRELLA POINT, TRINITY BAY TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770625, UMBRELLA POINT, TRINITY BAY, TX
Status: Accepted (Jul 25 2011)
Units: Feet
Control Station: 8771450 Galveston Pier 21, TX
T.M.: 90
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.28Mean Higher-High Water
MHW1.24Mean High Water
MTL0.67Mean Tide Level
MSL0.70Mean Sea Level
DTL0.64Mean Diurnal Tide Level
MLW0.10Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-6.43Station Datum
GT1.27Great Diurnal Range
MN1.14Mean Range of Tide
DHQ0.04Mean Diurnal High Water Inequality
DLQ0.09Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT1.96Highest Astronomical Tide
HAT Date & Time10/11/1987 08:12HAT Date and Time
LAT-1.10Lowest Astronomical Tide
LAT Date & Time01/19/1988 20:36LAT Date and Time
Tidal Datum Analysis Periods
09/01/1995 - 05/31/1996




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