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Datums for 8723921, GRASSY KEY NORTH SIDE, FLORIDA BAY FL


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8723921, GRASSY KEY NORTH SIDE, FLORIDA BAY, FL
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station: 8724580 Key West, FL
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.27Mean Higher-High Water
MHW1.10Mean High Water
MTL0.67Mean Tide Level
MSL0.60Mean Sea Level
DTL0.63Mean Diurnal Tide Level
MLW0.25Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.38North American Vertical Datum of 1988
STND-2.76Station Datum
GT1.27Great Diurnal Range
MN0.86Mean Range of Tide
DHQ0.17Mean Diurnal High Water Inequality
DLQ0.25Mean Diurnal Low Water Inequality
HWI8.43Greenwich High Water Interval (in hours)
LWI2.79Greenwich Low Water Interval (in hours)
Max Tide2.30Highest Observed Tide
Max Tide Date & Time02/19/1972 19:36Highest Observed Tide Date & Time
Min Tide-1.17Lowest Observed Tide
Min Tide Date & Time02/04/1971 06:42Lowest Observed Tide Date & Time
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
01/01/1971 - 12/31/1971
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8723921 GRASSY KEY NORTH SIDE, FLORIDA BAY, FL

Revised: 08/08/2018
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