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Current Datum Value: 2.64

Datums for 8635150, Colonial Beach, Potomac River VA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8635150, Colonial Beach, Potomac River, VA
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.94Mean Higher-High Water
MHW1.78Mean High Water
MTL0.96Mean Tide Level
MSL0.97Mean Sea Level
DTL0.97Mean Diurnal Tide Level
MLW0.15Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.99North American Vertical Datum of 1988
STND-2.64Station Datum
GT1.94Great Diurnal Range
MN1.63Mean Range of Tide
DHQ0.16Mean Diurnal High Water Inequality
DLQ0.14Mean Diurnal Low Water Inequality
HWI7.35Greenwich High Water Interval (in hours)
LWI1.40Greenwich Low Water Interval (in hours)
Max Tide5.21Highest Observed Tide
Max Tide Date & Time09/06/1996 15:30Highest Observed Tide Date & Time
Min Tide-3.91Lowest Observed Tide
Min Tide Date & Time04/04/1975 00:00Lowest Observed Tide Date & Time
HAT2.52Highest Astronomical Tide
HAT Date & Time09/17/1993 20:18HAT Date and Time
LAT-0.69Lowest Astronomical Tide
LAT Date & Time01/21/1996 14:12LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 8635150 Colonial Beach, Potomac River, VA

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services