Datums for 8594900, Washington DC

NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8594900, Washington, DC
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
MHHW3.17Mean Higher-High Water
MHW2.94Mean High Water
MTL1.55Mean Tide Level
MSL1.55Mean Sea Level
DTL1.59Mean Diurnal Tide Level
MLW0.15Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.40North American Vertical Datum of 1988
STND-4.55Station Datum
GT3.17Great Diurnal Range
MN2.79Mean Range of Tide
DHQ0.23Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWI0.48Greenwich High Water Interval (in hours)
LWI7.61Greenwich Low Water Interval (in hours)
Max Tide11.05Highest Observed Tide
Max Tide Date & Time10/17/1942 06:30Highest Observed Tide Date & Time
Min Tide-5.05Lowest Observed Tide
Min Tide Date & Time02/26/1967 04:24Lowest Observed Tide Date & Time
HAT3.81Highest Astronomical Tide
HAT Date & Time05/26/2021 12:18HAT Date and Time
LAT-0.79Lowest Astronomical Tide
LAT Date & Time02/01/2014 21:00LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001

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