Datums for 8417988, GREAT DIAMOND IS., CASCO BAY ME


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8417988, GREAT DIAMOND IS., CASCO BAY, ME
Status: Accepted (Apr 20 2004)
Units: Feet
Control Station: 8418150 Portland, ME
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW9.86Mean Higher-High Water
MHW9.43Mean High Water
MTL4.89Mean Tide Level
MSL4.93Mean Sea Level
DTL4.93Mean Diurnal Tide Level
MLW0.35Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-1.64Station Datum
GT9.86Great Diurnal Range
MN9.08Mean Range of Tide
DHQ0.43Mean Diurnal High Water Inequality
DLQ0.35Mean Diurnal Low Water Inequality
HWI3.58Greenwich High Water Interval (in hours)
LWI9.75Greenwich 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
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
09/01/1979 - 09/30/1979




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