Pearson Pilings are being used. The pearson pilings use a proprietary formula which makes their pilings stronger than steel even though it’s much lighter.
here is their website
Check out their website
PEARSON FIBERGLASS COMPOSITE PILINGS are today’s preferred building material for waterfront foundations, docks, piers and bridges. Our composite pilings are stronger than wood, steel or concrete pilings, and because they will not rust, rot or crumble, they will last virtually forever. Containing no chemical preservatives that leach into the water, our sustainable fiberglass composite pilings are environmentally friendly and are the choice of “green” developers of clean marinas and waterfront properties.
Kathy Chapman took this picture of the pilings loaded on the barge last week-