JOIN US SEARCH LOCATIONS CONTACT DEA HOME WHO WE ARE WHAT WE DO SOLUTIONS NEWS MARINE SERVICES :: ENVIRONMENTAL INVESTIGATIONS Marine and fresh waterways are unique natural environments for marine flora and fauna, and are critical assets to commerce, industry, and recreation. Maintaining and managing these crucial resources requires an understanding of their conditions, uses, and influences on both natural and human-made environments. DEA Marine Services has the experience and technical resources necessary to support environmental investigations, document and monitor conditions using current and historical data, and aid in the remediation of contaminated marine sites. Environmental investigations cover a broad range of hydrographic, oceanographic, and marine geophysical and associated geospatial services. We customize the instrumentation and methodology used to meet the specific project needs. In addition, DEA Marine Services has developed methods for semi-automated habitat mapping from acoustic backscatter. Environmental investigations typically support: Remedial Investigations (RI) Feasibility Studies (FS) Habitat mapping (macrophytes, currents, tidal range, bathymetry, and substrate material) Oyster cultch delineation and volumetric analysis Sediment cap construction and monitoring Sediment transport studies Inundation modeling Derelict fishing gear remediation Unexploded ordnance remediation Marine archaeological investigations Tide and current studies Acoustic noise compliance monitoring during construction Baseline condition with follow-on mapping and change analysis 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