eTrac completes high-resolution static and mobile terrestrial lidar surveys for a range of industry needs. These datasets are used independently or combined with multibeam & topographic datasets for a virtually seamless overlap of the three while also acting as a data QC tool. By combining multibeam data (collected on a high tide) with 3D terrestrial laser scanners (collected on a low tide), eTrac is able to create merged point clouds throughout the coastal environment, regardless of waterline location. This capability has proven itself to be highly effective in a number of applications. eTrac has been contracted to collect lidar data along breakwaters, dam faces, tunnels, and piers for structural analysis. Terrestrial lidar is a great alternative to topographic surveys when possible and is also used to get absolute coordinates on features and objects not easily accessible.