| Datum | Value | Description |
|---|---|---|
| MHHW | 9.56 | Mean Higher-High Water |
| MHW | 9.13 | Mean High Water |
| MTL | 4.73 | Mean Tide Level |
| MSL | 4.77 | Mean Sea Level |
| DTL | 4.78 | Mean Diurnal Tide Level |
| MLW | 0.34 | Mean Low Water |
| MLLW | 0.00 | Mean Lower-Low Water |
| NAVD88 | 5.14 | North American Vertical Datum of 1988 |
| CRD_OFFSET | Columbia River Datum Offset | |
| STND | -14.77 | Station Datum |
| GT | 9.56 | Great Diurnal Range |
| MN | 8.79 | Mean Range of Tide |
| DHQ | 0.43 | Mean Diurnal High Water Inequality |
| DLQ | 0.34 | Mean Diurnal Low Water Inequality |
| HWI | 3.71 | Greenwich High Water Interval (in hours) |
| LWI | 9.79 | Greenwich Low Water Interval (in hours) |
| Max Tide | 13.35 | Highest Observed Tide |
| Max Tide Date & Time | 01/04/2018 17:48 | Highest Observed Tide Date & Time |
| Min Tide | -3.07 | Lowest Observed Tide |
| Min Tide Date & Time | 02/20/2015 23:00 | Lowest Observed Tide Date & Time |
| HAT | 11.66 | Highest Astronomical Tide |
| HAT Date & Time | 11/05/1998 16:24 | HAT Date and Time |
| LAT | -2.18 | Lowest Astronomical Tide |
| LAT Date & Time | 12/23/1999 22:24 | LAT Date and Time |
| Tidal Datum Analysis Periods |
|---|
| 12/01/2005 - 11/30/2008 |
| 12/01/2009 - 11/30/2010 |
| 07/01/2011 - 06/30/2016 |