Inundation Analysis Tool


9439221 Portland Morrison Street Bridge, OR

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 1940-10-16 00:00:00 and 2009-01-28 23:59:00


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 -0.155 -0.51 Mean High Water
DTL -0.551 -1.81 Mean Diurnal Tide Level
MTL -0.59 -1.94 Mean Tide Level
MSL -0.639 -2.1 Mean Sea Level
MLW -1.025 -3.36 Mean Low Water
MLLW -1.102 -3.62 Mean Lower-Low Water
NAVD88 -3.245 -10.65 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