PIN OAK MARINE TERMINAL

Mt. Airy, Louisiana

The Pin Oak Marine Terminal petroleum liquids storage terminal project was a project along the east bank of the Mississippi River in Mt. Airy, St. John the Baptist Parish, Louisiana. The project included storage of 10 million barrels of crude oil, refined products, and chemicals on a 431-acre site for receiving and shipping of petroleum liquids and chemicals by rail, pipeline, barge, ship, and truck to and from both domestic and export markets.

Massman’s scope of work included the construction of a dock facility made up of five structures over the river. These structures were the electrical platform, firewater platform, dock house, dock, and hose tower. Massman constructed an elevated pipe rack which spans from the dock facility, over the batture, and across the levee and River Road where it ties into the landside work performed by other contractors.

All of the structures were founded on pipe piling, ranging from 12 to 36 inches in diameter. Each structure, except for the electrical platform, had jacketed piling with the heaviest pile jacket weighing about 240,000 pounds. In order to moor ships and barges, Massman drove 19 monopile dolphins. These monopiles ranged in size from 60-inch-diameter x 170-feet-long to 96-inch-diameter x 210-feet-long with variable wall thicknesses up to 2¼ inches. Nine of the monopile dolphins had jackets that were weld