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Datums for 8728690, Apalachicola FL


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8728690, Apalachicola, FL
Status: Accepted (Oct 7 2011)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.61Mean Higher-High Water
MHW1.51Mean High Water
MTL0.95Mean Tide Level
MSL0.91Mean Sea Level
DTL0.80Mean Diurnal Tide Level
MLW0.40Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.76North American Vertical Datum of 1988
STND-4.29Station Datum
GT1.61Great Diurnal Range
MN1.11Mean Range of Tide
DHQ0.10Mean Diurnal High Water Inequality
DLQ0.40Mean Diurnal Low Water Inequality
HWI8.76Greenwich High Water Interval (in hours)
LWI2.81Greenwich Low Water Interval (in hours)
Max Tide8.04Highest Observed Tide
Max Tide Date & Time07/10/2005 18:42Highest Observed Tide Date & Time
Min Tide-1.84Lowest Observed Tide
Min Tide Date & Time01/18/1981 15:42Lowest Observed Tide Date & Time
HAT2.08Highest Astronomical Tide
HAT Date & Time10/08/1990 09:18HAT Date and Time
LAT-0.96Lowest Astronomical Tide
LAT Date & Time01/18/1988 15:00LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8728690 Apalachicola, FL

Revised: 08/08/2018
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