Marine construction projects face significant challenges due to their physical environment as well as safety and environmental regulations. A well-engineered design with constructability in mind is essential for the successful construction of such projects. This study investigated the design features that created significant constructability benefits on the Pier 12 Replacement Project at San Diego, California. The US $82 Million fixed price design-build project involved the construction of a new 1,500-foot pier that could fulfill the utility needs of multiple stationed ships. The following design features were important in improving the constructability of the new pier: (1) Selection of plumb piles; (2) Design of uniform and longer pile spacing; (3) Increased depth of pile dowel tubes; (4) Use of T-headed pile dowels; (5) Avoiding the use of pile caps; (6) Minimizing the fluctuations of deck soffit elevations; (7) Minimizing the expansion joints; (8) Minimizing the variety of rebar sizes; and (9) Increasing the depth of concrete rebar cover.