Datums for 8779911, San Martin Lake Channel


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8779911, San Martin Lake Channel
Status: Accepted (Mar 17 2021)
Units: Feet
Control Station: 8779770 Port Isabel, TX
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.36Mean Higher-High Water
MHW1.29Mean High Water
MTL0.73Mean Tide Level
MSL0.80Mean Sea Level
DTL0.68Mean Diurnal Tide Level
MLW0.18Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.90North American Vertical Datum of 1988
STND-29.62Station Datum
GT1.36Great Diurnal Range
MN1.11Mean Range of Tide
DHQ0.08Mean Diurnal High Water Inequality
DLQ0.18Mean 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
HAT2.23Highest Astronomical Tide
HAT Date & Time10/12/2025 05:48HAT Date and Time
LAT-1.00Lowest Astronomical Tide
LAT Date & Time01/10/2005 15:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/2020 - 05/31/2020




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