Datums for 9454777, CHENEGA ISLAND (S.W. END)


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9454777, CHENEGA ISLAND (S.W. END)
Status: Superseded (Apr 17 2003) (Accepted Jan 7 1997)
Units: Feet
Control Station: 9454240 Valdez, AK
T.M.: 135
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW11.71Mean Higher-High Water
MHW10.82Mean High Water
MTL6.14Mean Tide Level
MSL6.26Mean Sea Level
DTL5.86Mean Diurnal Tide Level
MLW1.45Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-0.21Station Datum
GT11.72Great Diurnal Range
MN9.37Mean Range of Tide
DHQ0.89Mean Diurnal High Water Inequality
DLQ1.46Mean Diurnal Low Water Inequality
HWI10.06Greenwich High Water Interval (in hours)
LWI3.74Greenwich 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
09/03/1996 - 10/31/1996




Products available at 9454777 CHENEGA ISLAND (S.W. END),