Technical Specialties

Hydrographic Surveying

DEA provides the people, the experience, and the equipment necessary to make any marine services project a success. Our staff has conducted more than 500 major hydrographic surveying projects in coastal areas and inland waters throughout the United States and in the Caribbean and has extensive experience both at home and abroad with federal and state agencies as well as private companies.

Cutting-edge field equipment and computers augment DEA’s expertise. These tools allow the firm to maximize the effectiveness of its field personnel and maintain high levels of production and accuracy.

The John B. Preston, DEA’s custom-built hydrographic surveying vessel, was named for Oregon’s first surveyor general. This vessel is designed for both inland and offshore work.

Services

  • Bathymetric surveys
  • Geophysical surveys
  • GIS mapping
  • Magnetic/electromagnetic surveys
  • Navigation services
  • Sediment sampling and coring
  • Side-scan sonar
  • Submerged photo imagery
  • Tidal studies
Search the Site:  
Featured DEA Project

Sea-Tac Bagwell 3D Laser Scanning/Modeling

DEA used a combination of state-of-the-art, high-accuracy laser scanning and conventional surveying methods to create 3-D models and 2-D composite drawings charting the placement and route of all pipes and tubes with at least a one-inch diameter.

Learn More


Featured DEA Project

Las Haciendas Models

DEA landscape architects provided design services for a complex of nine model homes and two demonstration gardens that the client wanted to have the look and feel of a hacienda style.

Learn More