Datums for 8729753, BLACKWATER RIVER


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8729753, BLACKWATER RIVER
Status: Accepted (Apr 14 2004)
Units: Feet
Control Station: 8729747 SHIELD POINT, BLACKWATER RIVER
T.M.: 90
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.66Mean Higher-High Water
MHW1.53Mean High Water
MTL0.83Mean Tide Level
MSL0.83Mean Sea Level
DTL0.83Mean Diurnal Tide Level
MLW0.12Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.47North American Vertical Datum of 1988
STND-3.36Station Datum
GT1.66Great Diurnal Range
MN1.41Mean Range of Tide
DHQ0.12Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT2.43Highest Astronomical Tide
HAT Date & Time10/11/2025 07:12HAT Date and Time
LAT-1.14Lowest Astronomical Tide
LAT Date & Time01/10/2005 16:00LAT Date and Time
Tidal Datum Analysis Periods
01/01/1993 - 10/31/1993




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