Datums for 8415490, Rockland ME


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8415490, Rockland, ME
Status: Superseded (Apr 17 2003) (Accepted Apr 20 1998)
Units: Feet
Control Station: 8418150 Portland, ME
T.M.: 75
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW10.60Mean Higher-High Water
MHW10.14Mean High Water
MTL5.25Mean Tide Level
MSL5.30Mean Sea Level
DTL5.30Mean Diurnal Tide Level
MLW0.37Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-3.57Station Datum
GT10.60Great Diurnal Range
MN9.77Mean Range of Tide
DHQ0.46Mean Diurnal High Water Inequality
DLQ0.37Mean Diurnal Low Water Inequality
HWI3.45Greenwich High Water Interval (in hours)
LWI9.63Greenwich Low Water Interval (in hours)
Max Tide14.22Highest Observed Tide
Max Tide Date & Time03/18/1976 00:00Highest Observed Tide Date & Time
Min Tide-2.56Lowest Observed Tide
Min Tide Date & Time03/18/1976 00:00Lowest Observed Tide Date & Time
HAT12.85Highest Astronomical Tide
HAT Date & Time11/27/2034 16:24HAT Date and Time
LAT-2.29Lowest Astronomical Tide
LAT Date & Time11/27/2034 22:48LAT Date and Time
Tidal Datum Analysis Periods
01/01/1974 - 12/31/1983




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