GEI performed a comprehensive assessment of the CITGO Braintree Marine Terminal Facility with the goal of developing prioritized recommendations for long-term maintenance and repair improvements. Site investigation included above and underwater inspection of all existing structures, identification of elements requiring maintenance, mooring analysis, and development of repair and upgrade alternatives with recommendations. Specific recommendations included construction of a new stern dolphin and phased repairs to the steel cell structures.

While the steel cells all exhibited corrosion, the steel thickness measurements on Cell 3 (the primary product distribution manifold cell) identified this cell as having the most severe corrosion and a limited useful life. After a review of alternatives was performed, the selected alternative consisted of construction of a new cell around the outside of the existing cell.

In addition, the design included steel pile supported concrete dolphins on each side and integrated into the improvements of Cell 3 to provide mooring bollards for a new stern spring line and the relocation of the bow spring line.

GEI performed analysis and final design of the new cell and dolphin structures, which are founded on a shallow ledge at the site. The dock remained active during construction and simple details and proper phasing of the construction work was critical to limit impacts on CITGO vessels and product unloading operations.

GEI also obtained all the required regulatory approvals for this phase and provided construction oversight. Construction of this phase was completed in Spring 2014.