Datums for 8447685, Chappaquoit Point MA


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8447685, Chappaquoit Point, MA
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station: 8452660 Newport, RI
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW4.25Mean Higher-High Water
MHW3.99Mean High Water
MTL2.07Mean Tide Level
MSL1.85Mean Sea Level
DTL2.13Mean Diurnal Tide Level
MLW0.16Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.86Station Datum
GT4.25Great Diurnal Range
MN3.82Mean Range of Tide
DHQ0.27Mean Diurnal High Water Inequality
DLQ0.16Mean Diurnal Low Water Inequality
HWI0.37Greenwich High Water Interval (in hours)
LWI6.05Greenwich 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
HAT5.45Highest Astronomical Tide
HAT Date & Time10/16/1993 12:54HAT Date and Time
LAT-1.02Lowest Astronomical Tide
LAT Date & Time02/28/1998 19:48LAT Date and Time
Tidal Datum Analysis Periods
08/01/2000 - 09/30/2000




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