JOIN US SEARCH LOCATIONS CONTACT DEA HOME WHO WE ARE WHAT WE DO SOLUTIONS NEWS MARINE SERVICES :: INFRASTRUCTURE INSPECTION DEA has been on the forefront of high-resolution multibeam bathymetric survey technology for monitoring underwater structures since the early 1990s. We evolved this service to monitor stilling basins, dams, and coastal navigation structures using a variety of methods including: Surface-based, high-resolution multibeam sonar Underwater scanning bathymetric sonar Remotely Operated Vehicle (ROV) video inspections Above-water, high-definition laser scanning Sub-bottom profiling 3D modeling Acoustic Doppler current profiling These types of surveys have been performed for the USACE, the Waterways Experiment Station (now the ERDC Coastal and Hydraulics Laboratory), hydropower companies; Port Authorities; and state Departments of Transportation. The USACE mission of monitoring underwater structures and evaluating erosion areas before they become a problem requires quality data with highly accurate and precise horizontal and vertical positioning. DEA has been chosen to perform this work based on our demonstrated ability to fulfill USACE’s objective of precision monitoring. More Key Contacts :: Related Projects Marine Services Navigation and Nautical Charting Infrastructure Inspection Marine Design and Construction Support Flood Control and Reservoir Capacity Studies Environmental Investigations Marine Geophysical Investigations Geospatial Analysis Mobile Vessel Laser Scanning Hydrographic Surveys Marine Services Projects Who We Are History Core Ideology Leadership Stewardship Locations Contact DEA What We Do Energy Land Development Transportation Water and Environment Surveying and Geomatics Marine Services Solutions Alternative Project Delivery Construction Engineering Energy Development Engineering Landscape Architecture Environmental Planning and Compliance Planning Project Management News Awards Rankings Join Us Our People Current Openings Benefits Subconsultants and Vendors David Evans and Associates, Inc., 2100 S. River Parkway, Suite 100, Portland, OR 97201 :: 800.721.1916 Copyright © 1996-2021 David Evans and Associates, Inc. All rights reserved. :: Terms of Use | Privacy Policy