Datums for 8574070, Havre De Grace MD


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8574070, Havre De Grace, MD
Status: Accepted (May 24 2005)
Units: Feet
Control Station: 8574680 Baltimore, Fort McHenry, Patapsco River, MD
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW2.44Mean Higher-High Water
MHW2.10Mean High Water
MTL1.15Mean Tide Level
MSL1.18Mean Sea Level
DTL1.22Mean Diurnal Tide Level
MLW0.21Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-6.32Station Datum
GT2.45Great Diurnal Range
MN1.90Mean Range of Tide
DHQ0.34Mean Diurnal High Water Inequality
DLQ0.21Mean Diurnal Low Water Inequality
HWI2.33Greenwich High Water Interval (in hours)
LWI9.15Greenwich Low Water Interval (in hours)
Max Tide6.84Highest Observed Tide
Max Tide Date & Time09/06/1979 07:30Highest Observed Tide Date & Time
Min Tide-4.14Lowest Observed Tide
Min Tide Date & Time12/25/1980 18:24Lowest Observed Tide Date & Time
HAT3.15Highest Astronomical Tide
HAT Date & Time05/25/1986 15:24HAT Date and Time
LAT-0.56Lowest Astronomical Tide
LAT Date & Time01/22/1996 10:30LAT Date and Time
Tidal Datum Analysis Periods
01/01/1979 - 12/31/1991
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




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