List of Figures Figure 1. Columbia River littoral cell, the study area extends from Pt. Grenville, Washington to Tillamook Head, Oregon. Southern tip of Ocean shores, building is approximately 5 to 10 m from edge of the eroding dune. Arrows point to wave bumpers installed on beach to slow local erosion rates.
Arrows point to the highway at risk of erosion.
Map of the Columbia River littoral cell. Bold line indicates ocean shoreline and light lines are included to depict 10 and 20 m offshore contours. Solid circles identify coastal communities and arrows point to major coastal geographic features. Northern littoral cell boundary of Pt. Narrow beaches are evidence of the lack of sand.