Beach topography and nearshore bathymetry of the Columbia River littoral cell, Washington and Oregon (ver. 5.0, July 2026)

Repeat surveys of beach topography and nearshore bathymetry were performed by a team of scientists from the U.S. Geological Survey, Washington State Department of Ecology, and Oregon State University in the Columbia River littoral cell (CRLC), Washington and Oregon. Bathymetric and topographic data were collected along a series of shore-perpendicular survey lines spaced at 100- to 1,000-m intervals that extend from approximately 13 m water depth to just landward of the primary dune crest. Bathymetric surveys were performed using personal watercraft equipped with single-beam echosounders and survey-grade global navigation satellite system (GNSS) receivers. Topographic data were collected by walking along survey lines with GNSS receivers mounted on backpacks. Additional topographic data were collected along selected segments of the survey area using all-terrain vehicles (ATV) equipped with GNSS receivers. Surveys were performed annually between July and September during spring tides with nearshore bathymetry data collected during high tide, and topographic measurements collected during low tide to maximize coverage of intertidal areas, often achieving overlap between topographic and bathymetric profiles. The data were used to characterize interannual changes in coastal morphology and sediment volume to inform management of sediment resources throughout the region. This data release currently contains bathymetric data from 12 field activities performed between 2014 and 2025 and will be updated when additional surveys become available.