Datums for 8770475, Port Arthur TX


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8770475, Port Arthur, TX
Status: Accepted (Nov 4 2020)
Units: Feet
Control Station: 8770822 Texas Point, Sabine Pass, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.04Mean Higher-High Water
MHW0.99Mean High Water
MTL0.56Mean Tide Level
MSL0.60Mean Sea Level
DTL0.51Mean Diurnal Tide Level
MLW0.14Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.37North American Vertical Datum of 1988
STND-4.61Station Datum
GT1.04Great Diurnal Range
MN0.84Mean Range of Tide
DHQ0.05Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide4.76Highest Observed Tide
Max Tide Date & Time09/03/2017 09:42Highest Observed Tide Date & Time
Min Tide-2.15Lowest Observed Tide
Min Tide Date & Time12/21/2018 16:00Lowest Observed Tide Date & Time
HAT1.55Highest Astronomical Tide
HAT Date & Time05/16/1987 21:30HAT Date and Time
LAT-0.97Lowest Astronomical Tide
LAT Date & Time01/28/1987 15:48LAT Date and Time
Tidal Datum Analysis Periods
08/01/2016 - 07/31/2019




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