David Evans and Associates, also known as DEA, is one of the leading, employee-owned hydrographic surveying companies in the United States. It offers structural analysis and watershed management services. The company serves the energy and transportation services. David Evans and Associates provides geophysical surveying and oceanographic monitoring services to the federal, local and state governments. The company has served the National Oceanic and Atmospheric Administration. It offers civil engineering, environmental planning, and design and build solutions. David Evans and Associates provides project and program management services. The company has completed projects for the Phoenix Convention Center and the La Quinta Civic Center Park.