A bathymetric survey of Blue Mountain Lake, Arkansas, was conducted in May 2017 by the Lower Mississippi-Gulf Water Science Center of the U.S. Geological Survey (USGS) using methodologies for sonar surveys similar to those described by Wilson and Richards (2006). Point data from the bathymetric survey were merged with point data from an aerial LiDAR survey conducted in December 2010 for the U.S. Army Corps of Engineers (USACE), Little Rock District. From the combined point data, a terrain dataset (a type of triangulated irregular network, or TIN model) was created in Esri ArcGIS for the lakebed within the extent of pool elevation 420 feet above the North American Vertical Datum of 1988 (NAVD88). Products included in this data release are: 1) an Esri file geodatabase containing point data from the bathymetric and LiDAR surveys, the terrain dataset, a digital elevation model (DEM) in Esri GRID format with a 3-ft cell size, a feature class of bathymetric contours at 4-ft intervals, and a table of storage capacity (volume) of the lake at 1-ft increments in water surface elevation from 350-420 ft NAVD88 and seasonal conservation and flood pool elevations; and 2) a second 3-ft DEM in GeoTiff format. Reference Cited: Wilson, G.L. and Richards, J.M., 2006, Procedural Documentation and Accuracy Assessment of Bathymetric Maps and Area/Capacity Tables for Small Reservoirs, U.S. Geological Survey Scientific Investigations Report 2006-5208, available at https://pubs.usgs.gov/sir/2006/5208/.
