Datums for 8572770, Matapeake MD


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8572770, Matapeake, MD
Status: Superseded (Apr 17 2003) (Accepted Feb 4 1994)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW1.49Mean Higher-High Water
MHW1.22Mean High Water
MTL0.73Mean Tide Level
MSL0.76Mean Sea Level
DTL0.75Mean Diurnal Tide Level
MLW0.23Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.85Station Datum
GT1.49Great Diurnal Range
MN0.99Mean Range of Tide
DHQ0.27Mean Diurnal High Water Inequality
DLQ0.23Mean Diurnal Low Water Inequality
HWI10.20Greenwich High Water Interval (in hours)
LWI3.99Greenwich Low Water Interval (in hours)
Max Tide4.75Highest Observed Tide
Max Tide Date & Time09/15/1979 00:00Highest Observed Tide Date & Time
Min Tide-3.37Lowest Observed Tide
Min Tide Date & Time04/05/1975 00:00Lowest Observed Tide Date & Time
HAT1.95Highest Astronomical Tide
HAT Date & Time06/25/2021 10:24HAT Date and Time
LAT-0.54Lowest Astronomical Tide
LAT Date & Time01/21/2019 15:48LAT Date and Time
Tidal Datum Analysis Periods




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