| Datum | Value | Description |
|---|---|---|
| MHHW | 2.12 | Mean Higher-High Water |
| MHW | 1.62 | Mean High Water |
| MTL | 0.90 | Mean Tide Level |
| MSL | 0.92 | Mean Sea Level |
| DTL | 1.06 | Mean Diurnal Tide Level |
| MLW | 0.18 | Mean Low Water |
| MLLW | 0.00 | Mean Lower-Low Water |
| Ortho | ||
| CRD_OFFSET | Columbia River Datum Offset | |
| STND | -2.85 | Station Datum |
| GT | 2.12 | Great Diurnal Range |
| MN | 1.45 | Mean Range of Tide |
| DHQ | 0.50 | Mean Diurnal High Water Inequality |
| DLQ | 0.17 | Mean Diurnal Low Water Inequality |
| HWI | 2.04 | Greenwich High Water Interval (in hours) |
| LWI | 8.27 | Greenwich Low Water Interval (in hours) |
| Max Tide | 3.45 | Highest Observed Tide |
| Max Tide Date & Time | 12/15/2016 15:12 | Highest Observed Tide Date & Time |
| Min Tide | -0.70 | Lowest Observed Tide |
| Min Tide Date & Time | 04/09/2009 19:42 | Lowest Observed Tide Date & Time |
| HAT | 3.02 | Highest Astronomical Tide |
| HAT Date & Time | 07/12/1987 02:54 | HAT Date and Time |
| LAT | -0.48 | Lowest Astronomical Tide |
| LAT Date & Time | 01/28/1983 06:42 | LAT Date and Time |
| Tidal Datum Analysis Periods |
|---|
| 12/01/2007 - 11/30/2013 |
| 01/01/2015 - 12/31/2015 |