Inundation Analysis Tool


9454153 GRAVINA RIVER, AK

Please see the data inventory to find a period with hourly or six-minute data available.
Data Inventory

Note that this is a historical station and data may be available between 1976-06-23 00:00:00 and 2022-08-12 15:30:00


Select a reference elevation and specify a date range for analysis.

You may select from an accepted tidal datum or specify a different elevation.
Most elevations on land are given relative to a geodetic datum such as NAVD88

All analysis results are presently provided in meters relative to the requested threshold.

Meters relative to MHHWFeet relative to MHHWDatum
MHHW 0.0 0.0 Mean Higher-High Water
MHW -0.28 -0.92 Mean High Water
DTL -1.835 -6.02 Mean Diurnal Tide Level
MTL -1.746 -5.73 Mean Tide Level
MSL -1.708 -5.6 Mean Sea Level
MLW -3.212 -10.54 Mean Low Water
MLLW -3.669 -12.04 Mean Lower-Low Water
NAVD88 -3.424 -11.23 North American Vertical Datum
User Specified Elevation         in       relative to   


Note: Data query is limited to a 10 year maximum and 1 month minimum date range when requesting an analysis of 6-minute data


6-minute Height and High Water Analysis
Hourly Height and High Water Analysis
Hourly Height Analysis