Datums for 8571117, Ewell, Smith Island MD


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8571117, Ewell, Smith Island, MD
Status: Accepted (Mar 16 2011)
Units: Feet
Control Station: 8635750 Lewisetta, VA
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.85Mean Higher-High Water
MHW1.67Mean High Water
MTL0.91Mean Tide Level
MSL0.94Mean Sea Level
DTL0.93Mean Diurnal Tide Level
MLW0.15Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-0.37Station Datum
GT1.85Great Diurnal Range
MN1.52Mean Range of Tide
DHQ0.17Mean Diurnal High Water Inequality
DLQ0.15Mean Diurnal Low Water Inequality
HWI5.55Greenwich High Water Interval (in hours)
LWI12.07Greenwich 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
07/01/2010 - 10/31/2010




Products available at 8571117 Ewell, Smith Island, MD