ANAMAR was contracted by USACE Wilmington District to perform an MPRSA Section 103 Tier I sediment evaluation for the North Carolina State Ports Authority facilities and portions of the inner and outer harbor, and a Tier III sediment evaluation for other portions of the outer harbor and U.S. Coast Guard Station Fort Macon.
The project purpose is to support USACE’s navigation mission of maintaining the federal navigation within Morehead City Harbor to its authorized depth. ANAMAR provided all necessary information to determine the suitability of dredged material for ocean disposal at the Morehead City ODMDS. The testing program followed guidelines established in the Evaluation of Dredged Material Proposed for Ocean Disposal – Testing Manual (Green Book) and Southeast Region Implementation Manual (SERIM).
Areas to be dredged were divided into six project-specific dredging units (DUs), with four associated with the Tier I analysis and two associated with the Tier III analysis. Each DU represented defined associated basins, channel reaches, or ranges based on expected sediment characteristics. Field sampling for the Tier III analysis involved collection of vibracore and grab sediment samples and site water. ANAMAR coordinated and directed field operations and worked closely with USACE and EPA to design sampling and analysis schemes, collect samples, and subcontract coring services and laboratory analysis. ANAMAR reviewed all data and produced a Tier I evaluation and Tier III testing report summarizing the analytical results, along with a sediment evaluation for use by USACE in obtaining concurrence from EPA.