| Datum | Value | Description |
|---|---|---|
| MHHW | 6.83 | Mean Higher-High Water |
| MHW | 6.14 | Mean High Water |
| MTL | 3.74 | Mean Tide Level |
| MSL | 3.69 | Mean Sea Level |
| DTL | 3.42 | Mean Diurnal Tide Level |
| MLW | 1.33 | Mean Low Water |
| MLLW | 0.00 | Mean Lower-Low Water |
| NAVD88 | ||
| CRD_OFFSET | Columbia River Datum Offset | |
| STND | -4.00 | Station Datum |
| GT | 6.83 | Great Diurnal Range |
| MN | 4.82 | Mean Range of Tide |
| DHQ | 0.69 | Mean Diurnal High Water Inequality |
| DLQ | 1.33 | Mean Diurnal Low Water Inequality |
| HWI | 11.36 | Greenwich High Water Interval (in hours) |
| LWI | 4.95 | Greenwich Low Water Interval (in hours) |
| Max Tide | 10.97 | Highest Observed Tide |
| Max Tide Date & Time | 01/30/2007 21:54 | Highest Observed Tide Date & Time |
| Min Tide | -3.67 | Lowest Observed Tide |
| Min Tide Date & Time | 12/13/2008 05:24 | Lowest Observed Tide Date & Time |
| HAT | 9.03 | Highest Astronomical Tide |
| HAT Date & Time | 12/02/1990 22:24 | HAT Date and Time |
| LAT | -2.62 | Lowest Astronomical Tide |
| LAT Date & Time | 06/22/1986 17:42 | LAT Date and Time |
| Tidal Datum Analysis Periods |
|---|
| 05/01/2006 - 04/30/2015 |
| 11/01/2015 - 10/31/2018 |