| Datum | Value | Description |
|---|---|---|
| MHHW | 1.47 | Mean Higher-High Water |
| MHW | 1.40 | Mean High Water |
| MTL | 0.79 | Mean Tide Level |
| MSL | 0.87 | Mean Sea Level |
| DTL | 0.73 | Mean Diurnal Tide Level |
| MLW | 0.17 | Mean Low Water |
| MLLW | 0.00 | Mean Lower-Low Water |
| NAVD88 | ||
| CRD_OFFSET | Columbia River Datum Offset | |
| STND | -24.25 | Station Datum |
| GT | 1.47 | Great Diurnal Range |
| MN | 1.23 | Mean Range of Tide |
| DHQ | 0.07 | Mean Diurnal High Water Inequality |
| DLQ | 0.17 | Mean Diurnal Low Water Inequality |
| HWI | Greenwich High Water Interval (in hours) | |
| LWI | Greenwich Low Water Interval (in hours) | |
| Max Tide | 3.61 | Highest Observed Tide |
| Max Tide Date & Time | 10/07/2017 23:48 | Highest Observed Tide Date & Time |
| Min Tide | -0.97 | Lowest Observed Tide |
| Min Tide Date & Time | 12/22/2018 13:30 | Lowest Observed Tide Date & Time |
| HAT | 2.28 | Highest Astronomical Tide |
| HAT Date & Time | 10/19/1989 04:00 | HAT Date and Time |
| LAT | -1.00 | Lowest Astronomical Tide |
| LAT Date & Time | 12/31/1986 14:36 | LAT Date and Time |
| Tidal Datum Analysis Periods |
|---|
| 01/01/2017 - 11/30/2017 |