Datums for 8773896, Shoalwater Flats


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8773896, Shoalwater Flats
Status: Accepted (Feb 22 2021)
Units: Feet
Control Station: 8774770 Rockport, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW0.31Mean Higher-High Water
MHW0.31Mean High Water
MTL0.16Mean Tide Level
MSL0.17Mean Sea Level
DTL0.16Mean Diurnal Tide Level
MLW0.01Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88-0.55North American Vertical Datum of 1988
STND-28.81Station Datum
GT0.31Great Diurnal Range
MN0.31Mean Range of Tide
DHQ0.00Mean Diurnal High Water Inequality
DLQ0.01Mean 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
HAT0.39Highest Astronomical Tide
HAT Date & Time12/25/2026 09:48HAT Date and Time
LAT-0.09Lowest Astronomical Tide
LAT Date & Time12/13/2004 20:24LAT Date and Time
Tidal Datum Analysis Periods
12/01/2019 - 05/31/2020




Products available at 8773896 Shoalwater Flats,