The downloadable ZIP file contains an Esri shapefile.  This is a bathymetric data set of Coeur d'Alene Lake, Coeur d'Alene River, St. Joe River, and Spokane River. This data was derived from bathymetric contour lines created by Parametrix, Golder and USGS. The contour lines were interpreted by the ArcGIS using the "Topo to Raster" tool to produce raster surfaces (i.e. Digital Elevation Model (DEM)). For most of the project area the contour lines had a one-foot increment. The only exception to this was when USGS data was used for areas around the Lateral Lakes along the Coeur d'Alene River. Five-foot contour lines were then generated from the DEM. Contour attribute is displayed in feet above sea level.The original data sets used for the basis of this project were created for various studies of Coeur d'Alene Lake. Primarily, in relation to the re licensing of the Post Falls dam. This dataset was created to try to avoid many of the edge matching issues that arose around the original Parametrix data set. This data set will also be used to generate future contour lines of the lake and rivers.These data were contributed to INSIDE Idaho at the University of Idaho Library in 2004.