US Army Corps of Engineers topographic LiDAR surveys, 2009 - 2010.Estuary Partnership shallow water bathymetric surveys, 2009 - 2010.US Army Corps of Engineers crossline and channel bathymetric surveys, 2000 - 2009.NOAA multibeam bathymetric surveys, 2008-2009.The model incorporates the most recent elevation data which has been collected for the lower Columbia River and its floodplain, including the following sources: The project was completed primarily to suppor t hydraulic modeling related to the Columbia River Treaty, however its applications extend far beyond this. The 2010 Lower Columbia Terrain Model is a combined bathymetric/topographic seamless digital surface model created by the Portland District of the US Army Corps of Engineers.
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