Datums for 8459681, Block Island RI


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8459681, Block Island, RI
Status: Superseded (Apr 17 2003) (Accepted May 19 2000)
Units: Feet
Control Station: 8452660 Newport, RI
T.M.: 75
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW3.00Mean Higher-High Water
MHW2.75Mean High Water
MTL1.43Mean Tide Level
MSL1.40Mean Sea Level
DTL1.50Mean Diurnal Tide Level
MLW0.11Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-7.98Station Datum
GT3.01Great Diurnal Range
MN2.64Mean Range of Tide
DHQ0.26Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWI0.38Greenwich High Water Interval (in hours)
LWI6.61Greenwich 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
HAT4.09Highest Astronomical Tide
HAT Date & Time10/27/2011 12:30HAT Date and Time
LAT-0.85Lowest Astronomical Tide
LAT Date & Time02/12/2032 07:12LAT Date and Time
Tidal Datum Analysis Periods
05/01/1998 - 10/31/1998




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