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Status: Superseded (Apr 17 2003) (Accepted Mar 24 1998)
Units: Feet
Control Station: 8594900 Washington, DC
T.M.: 75
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW1.97Mean Higher-High Water
MHW1.74Mean High Water
MTL0.91Mean Tide Level
MSL0.91Mean Sea Level
DTL0.98Mean Diurnal Tide Level
MLW0.08Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-2.38Station Datum
GT1.97Great Diurnal Range
MN1.66Mean Range of Tide
DHQ0.23Mean Diurnal High Water Inequality
DLQ0.08Mean Diurnal Low Water Inequality
HWI7.29Greenwich High Water Interval (in hours)
LWI1.30Greenwich Low Water Interval (in hours)
Max Tide5.47Highest Observed Tide
Max Tide Date & Time09/06/1996 19:30Highest Observed Tide Date & Time
Min Tide-3.65Lowest Observed Tide
Min Tide Date & Time04/04/1975 00:00Lowest Observed Tide Date & Time
HAT2.47Highest Astronomical Tide
HAT Date & Time09/20/2028 20:36HAT Date and Time
LAT-0.76Lowest Astronomical Tide
LAT Date & Time01/14/2036 14:12LAT Date and Time
Tidal Datum Analysis Periods
01/01/1973 - 12/31/1984




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